DERR-1993-015341 - 0901a06880541f42

PROPERTY COMPLETION REPORT
DOE ID NO.: MS-00025-RS
ADDRESS: 516 CIRCLE DRIVE
MONTICELLO, UTAH 84535
JULY 1993
Prepared for
Decontamination and Decommissioning Program
Division of Facilities and Site Decommissioning
Department of Energy
RUST Geotech Inc. has been granted authorization to conduct remedial action under
the Decontamination and Decommissioning Program. Remedial action was done in
accordance with the U.S. Environmental Protection Agency "Standards for Cleanup of
Land and Buildings Contaminated with Residual Radioactive Materials from Inactive
Uranium Processing Sites," 40 CFR 192.12, 192.20-23.
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
by
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
SCANNED ,
nr»p-|qq3-0|534l
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.1.3 Radon Decay-Product Concentration (RDC) Measurement .... 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
DOE ID NO.: MS-00025-RS
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Decontamination and Decommissioning Program with the primary
objective of reducing the potential hazard to the public due to long-term
exposure to low-level radioactivity associated with the offsite mill tailings
derived from the former U.S. Atomic Energy Commission (AEC) uranium
mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to provide
additional sources of vanadium needed during World War II. Various
government agencies operated the mill until 1947. The AEC obtained the
mill in 1948 and operated it through 1959 under cost-type contracts to
provide both uranium and vanadium. Mill operations were terminated on
January 1, 1960.
The mill processed approximately one million tons of ore during the AEC
operations. Throughout the operating period, mill tailings from the
Monticello millsite were removed from the site and used for construction-
related activities in the vicinity.
1.2 Criteria for Remedial Action
The Decontamination and Decommissioning Program adopted the
"Standards for Remedial Actions at Inactive Uranium Processing Sites"
(40 CFR Part 192) for all cleanup activities under the MVP Project. These
standards were prepared by the U.S. Environmental Protection
Agency (EPA) to establish guidelines for the control of tailings piles and
the cleanup of buildings and open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Inclusion Survey Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the EPA
standards. The Remedial Action Contractor was notified of the inclusion
of this property into the Decontamination and Decommissioning Program
and was authorized by the DOE to conduct remedial action as required to
bring the property into conformance with the EPA standards.
1
DOE ID NO.: MS-00025-RS
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
MS-00025-RS
Beginning 148.67 feet south and 339.22 feet east of the center of Section 36,
T33S., R23E., Salt Lake Base Meridian; south 74 degrees 05 minutes west
128 feet, north 22 degrees 16 minutes west 142.843 feet, east 173.52 feet,
south 98.7 feet to beginning, County of San Juan, State of Utah
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
516 Circle Drive
Monticello, Utah 84535

Residential Simple (RS)
Oak Ridge National Laboratory
March 10, 1989
RUST Geotech Inc.
October 3, 1989
Sonderegger Construction
P.O. Box 6
Monticello, Utah
May 8, 1990
May 22, 1990
Interior:
Exterior:
0 cubic yards
79 cubic yards
193 square meters (m2)
June 1993
2
DOE ID NO.: MS-00025-RS
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual radioactive
material (Appendix Figure 2.1). Once excavation was complete, the
affected areas were resurveyed for possible remaining residual radioactive
material and, upon attaining satisfactory results, were backfilled with
uncontaminated material. The property was restored to a physical
condition comparable to that which existed prior to remedial action
activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified 18 cubic yards of contamination,
ranging from 6 inches to 18 inches deep, within the property. The
remedial action process included the removal of approximately 79 cubic
yards of residual radioactive material, ranging from 8 inches to 18 inches
deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00025-RS
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by RUST Geotech Inc. during
May 1989, as described in the final REA dated October 1989.
Appendix Figure 2.1 shows the extent of assessed contamination
and identifies the areas recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to backfilling.
Following the gamma scan, soil samples representative of the
6-inch-thick soil layer at the bottom of the excavation were
collected. These samples were blended to form composite
samples representing the verification areas (Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 11 microroentgens per hour (//R/h)
to 24 jjR/h (Appendix Figure 2.1). The results of analyses for
radium-226 in three composite soil samples ranged from
2.1 picocuries per gram (pCi/g) to 6.2 pCi/g (Appendix Table 3.1).
3.1.3 Radon Decay-Product Concentration (RDC) Measurement
Based on measurements representing an annual average, the
RDC was 0.0065 working level (WL), as indicated in Appendix
Table 3.2. Appendix Figure 2.1 shows the measurement location
on the ground floor (the lowest habitable level of the structure).
4
DOE ID NO.: MS-00025-RS
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by the EPA standards (40 CFR 192.12, 192.20-23),
as indicated in the Certification Data Summary below.
Therefore, the property located at 516 Circle Drive, in Monticello, Utah,
is recommended for certification as required by the Decontamination
and Decommissioning Program guidelines, and the appropriate records
should be documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Standards
Shall not exceed 20 jjR/h
above background.*
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Results
Range for the ground
floor was 11 //R/h to
16//R/h.
Annual average was
0.0065 WL.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background* in the
15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above background1 in any
15-cm-thick soil layer
more than 15 cm below
the surface, averaged
over 100 m2.
< 5 pCi/g above
background.
Soil sample results ranged
from 2.1 pCi/g to
6.2 pCi/g.
*The background exposure rate is approximately 15 //R/h.
The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00025-RS
4.0 APPENDIX
Appendix Tables:
Table 3.1 Post-Excavation Sample/Measurement Results
Table 3.2 Radon Decay-Product Concentration
Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
MM-SJW:06-08-93
MS-00025.RS WP51
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00025-RS
Address: 516 Circle Drive, Monticello, Utah
The analytical uncertainties in the table are reported at the 95-percent confidence
interval. A less-than sign (<) indicates that the minimum detection limit based on
Compton background was reached.
Area
Exposure- Soil
Rate Range Sample
O/R/h) Ticket No.
Meas.
Method *
Radium-226
(pCi/g)
Potassium
(pCi/g)
Thorium
(pCi/g)
V-l
V-2
V-3
14 - 24
14 - 19
13 - 18
MNZ 634
MNZ 635
MNZ 636
AL
AL
AL
6.2 ± 0.9
3.5 ± 0.5
2.1 ± 0.3
< 0.3 1.1 ± 0.3
18.0 ±3.9 1.3 ±0.3
17.9 ±3.8 1.1 ±0.3
See Appendix Figure 2.1 for the verification areas.
*AL = Analytical Laboratory
7
Table 3.2
Radon Decay-Product Concentration Measurement Results
DOE ID No.: MS-00025-RS
Address: 516 Circle Drive, Monticello, Utah
Instrument Type: Terradex Radtrak® Detector
Detector
Number Start Date End Date
Tracks Per
mm2
Radon
Concentration
(pCi/L)
Working
Level
3142692
3142031
3142676
09-12-90
09-12-90
09-12-90
09-17-91
09-17-91
09-17-91
11.5
11.1
10.4
1.35
1.30
1.22
0.0068
0.0065
0.0061
Annual Average: 0.0065
See Appendix Figure 2.1 for the measurement location.
8
10 12 14
T—i—i—r
16
i—r
18 20 22 24 26 28 30 32 34 36 38
i—i i j—\—i—i—i—i—i—i—i—i—i—i—i—r
WEST FIFTH SOUTH STREET
7l 12-15 24
0
12
0 V-1
16-17
fc o RDC or 3 GARAGE CO
to
ONE STORY
FRAME HOUSE O to RDC
L a:
O
to
DRWE CIRCLE
NO. DATE
SCALE IN FEET
Y
2.0 40
UORTH
i—i—i—i—r
LEGEND
ALL DEPTHS'IN INCHES
ALL EXPOSURE RATES IN; pR/H
ASSESSED AREA IDENTIFIER
.20....:. .10....:...0.....:
^ : RMOO029V 06/16/93 TMT/82*
THIS DRAWING. PREPARED FOR THE DECONTAMINATION AND
DECOMMISSIONING PROGRAM. IS FOR THE SOLE USE OF THE
U.S. DEPARTMENT OF ENERGY AND ITS CONTRACTORS. IT IS i
NOT A LAND SURVEY PLAT. UTILITY LOCATION PLAT.: OR OTHER
IMPROVEMENT SURVEY PLAT AND IS NOT TO BE RELIED UPON
FOR THE ESTABLISHMENT OF FENCE. BUILDING, OR OTHER
FUTURE IMPROVEMENT LINES.
10
J L
12
I I I I I I I I I I I I I L
14 16 18 20 22 24 26
J L
28
[AVERAGE DEPTH OF ASSESSED
IAREA OF ASSESSED CONTAMINATION
IPOST-I-REMEDIAL ACTION: EXPOSURE--
BOUNDARY"OF EXCAVATION
CONTAMINATION
RATE RANGE
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
ICONTAMIN ATI ON"':'i
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
;AND EXCAVATION EXPOSURE-RATE RANGE
:POST-I-REMEDIAL ACTION I RADON DECAY-PRODUCT
[CONCENTRATION MEASUREMENT LOCATION
ASSESSED CONTAMINATION NOT FOUND AT TIME
;OF RE3MEDIAL ACTION
EXTEP.IOR
FIGURE =2.1
EXTENT OF CONTAMINATION
RESIDENCE-NO. OF OCCUPANTS
NON-RESIDENCE—MAN. HRS./WK.
INSTRUMENT NO. SURVEYOR
SURVEY DATE
VERIFICATION
30
BY CK. A.E. APP. NO. DATE CK. A.E. APP.
40 4
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE, COLORADO
ENttT
SUBMITTED'.
516 CIRCLE DRIVE
MONTICELLO, UTAH
12
DATE APPROVAL DOE
32 34
I DOE ID NO. MS-00025-RS
B00025-VW 1 OF 1
36 38 40 4
DOE ID NO.: MS- OQQ&>^-~~ 'V^V-S
Property Address :3\ l<? 5^cJ-\txV"^OSv lAg\Saa&Ci
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
Chem-Nuclear Geotech. Inc.
YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m3.
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2. s—-
In-situ [ ] Lab(f><]
Interior gamma is < 20 /uR/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21.
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Decontamination and
Decommissioning
Program (Rev. 03/02/87).
[X]* [ ]
CM
[X]
[ ]
[ ]
[ ]
[ ]
[ 1
[ 1
[ ]
[ ]
[ ]
[ ]
U.S. Department
of Energy (DOE)
YES NO NOT TAKEN
l>0 t ] [ ]
tX] [ ] t 1
tvi t ] t ]
[/] [ ] [ ]
[ ] / hfl / t l
[ ] [ ) M
COMMENTS: *The excavations were backfilled with materials that were measured
at the source showing that the Ra-226 concentrations are in the range of
normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
inn
SFCERT1 FED •llllllll
SFMS-89062
DOE ID NO.: MS-
CHEM-NUCLEAR GEOTECH, INC., RECOMMENDATION
Based on the Chem-Nuclear Geotech, Inc., evaluation, I recommend this property
for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
'21 iarry A. Pe
Decontamiination and Decommissioning Program Manager
Chem-Nuclear Geotech, Inc.
Date
DOE EVALUATION
[yj Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental standards
were applied per 40 CFR 192.21.
Decontamination and Decoi
Certification Official
Department of Energy
ss ioriiny Program Date
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS. INC.
GRAND JUNCTION OFFICE
P. O. BOX 2567
GRAND JUNCTION. COLORADO 81502
MAY 2 61993
Jacob W. Gatrell
Office of Environmental Restoration
Southwestern Area Programs Division
U.S. Department of Energy
EM-451/GTN/D-247
Washington, DC 20545
Dear Mr. Gatrell:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil, indoor radon daughter
concentration, and indoor gamma exposure rate at this property.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Mary J. Wilson
Pollutant Assessments Group
Location Number: MS00062
Location Address: 316 South 1st East Street
Monticello. Utah 84535
Property Owner:

Monticello. Utah 84535
Attachments
DOE ID NO.: MS-00062-RS
1.3 summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
MS-00062-RS
Parcel No. M-55, Block 8, City of
Monticello, County of San Juan, State
of Utah
316 South First East Street
Monticello, Utah 84535
Estate of Eva B. Black

Residential Simple (RS)
Oak Ridge National Laboratory
October 14, 1988
Chem-Nuclear Geotech, Inc.
March 29, 1989
Crowley Construction
East Route
Monticello, Utah
June 23, 1989
September 15, 1989
Interior: 0 cubic yards
Exterior: *1SVcubic yards
\"486\ square meters (m2)
February 1993
2
DOE ID NO.: MS-00062-RS
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property
to the extent required by the EPA standards (40 CFR 192.12,
192.20-23), as indicated in the Certification Data Summary below.
Therefore, the property located at 316 South First East Street, in
Monticello, Utah, is recommended for certification as required by
the Decontamination and Decommissioning Program guidelines, and the
appropriate records should be documented.
Certification Data Summary
Standards Applicability Survey Results
Habitable Structures
Exposure Rate: Shall not exceed 20 pR/h
above background.*
Ranges were 12 uR/h to
14 juR/h for the
basement of Building 1,
and 14 /iR/h to 22 pR/h
for the ground floor of
Building 2.
Radon Decay-Product
Concentration:
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Annual averages were
0.0134 WL for
Building 1, and
0.0109 WL for
Building 2.
Land
Radium-226 Concentration
in Surface Soil:
Shall not exceed 5 pCi/g
above background** in
the 15-cm surface layer,
averaged over 100 ma.
< 5 pCi/g above
background.
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 15 pCi/g
above background** in any
15-cm-thick soil layer
more than 15 cm below the
surface, averaged over
100 m*.
Soil sample results
ranged from 1.3 pCi/g
to 2.7 pCi/g.
*The background exposure rate is approximately 15 fuR/h.
**The background radium-226 concentration is approximately 2.0 pCi/g.
5
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00062-RS
ADDRESS: 316 SOUTH FIRST EAST STREET
MONTICELLO, UTAH 84535
FEBRUARY 1993
Prepared for
Decontamination and Decommissioning Program
Division of Facilities and Site Decommissioning
Department of Energy
by
Chem-Nuclear Geotech, Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
* Harry X". Perry '
Program Manager
Chem-Nuclear Geotech, Inc., has been granted authorization to conduct remedial
action under the Decontamination and Decommissioning Program. Remedial action
was done in accordance with the Environmental Protection Agency Standards for
Cleanup of Lands and Buildings Contaminated with Residual Radioactive Material
from Inactive Uranium Processing Sites, 40 CFR 192.12, 192.20-23.
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action . 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.1.3 Radon Decay-Product Concentration (RDC) Measurement ... 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
DOE ID NO.: MS-00062-RS
1.0 SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) project was accepted into
the Decontamination and Decommissioning Program with the primary
objective of reducing the potential hazard to the public due to
long-term exposure to low-level radioactivity associated with the
offsite mill tailings derived from the former U.S. Atomic Energy
Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to
provide additional sources of vanadium needed during World War II.
Various government agencies operated the mill until 1947. The AEC
obtained the mill in 1948 and operated it through 1959 under
cost-type contracts to provide both uranium and vanadium. Mill
operations were terminated on January 1, 1960.
The mill processed approximately one million tons of ore during the
AEC operations. Throughout the operating period, mill tailings from
the Monticello millsite were removed from the site and used for
construction-related activities in the vicinity.
1.2 Criteria for Remedial Action
The Decontamination and Decommissioning Program has adopted the
"Standards for Remedial Action at Inactive Uranium Processing Sites"
(40 CFR Part 192) for all cleanup activities under the MVP project.
These standards were prepared by the U.S. Environmental Protection
Agency (EPA) to establish guidelines for the control of tailings
piles and the cleanup of buildings and open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Inclusion Survey Contractor. The
DOE reviewed these evaluation results and determined that the
property contained mill tailings (residual radioactive material)
exceeding the EPA standards. The Remedial Action Contractor was
notified of the inclusion of this property into the Decontamination
and Decommissioning Program and was authorized by the DOE to conduct
remedial action as required to bring the property into conformance
with the EPA standards.
1
DOE ID NO.: MS-00062-RS
Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
MS-00062-RS
Parcel No. M-55, Block 8, City of
Monticello, County of San Juan, State
of Utah
316 South First East Street
Monticello, Utah 84535

Residential Simple (RS)
Oak Ridge National Laboratory
October 14, 1988
Chem-Nuclear Geotech, Inc.
March 29, 1989
Crowley Construction
East Route
Monticello, Utah
June 23, 1989
September 15, 1989
Interior: 0 cubic yards
Exterior: 115 cubic yards
486 square meters (m2)
February 1993
DOE ID NO.: MS-00062-RS
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual
radioactive material (Appendix Figure 2.1). Once excavation was
complete, the affected areas were resurveyed for possible remaining
residual radioactive material and, upon attaining satisfactory
results, were backfilled with uncontaminated material. The property
was restored to a condition comparable to that which existed prior
to remedial action activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified 59 cubic yards of
contamination, ranging from 6 inches to 12 inches deep, within the
property. The remedial action process included the removal of
approximately 115 cubic yards of residual radioactive material,
ranging from 6 inches to 36 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00062-RS
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by Chem-Nuclear
Geotech, Inc., during October 1988, as described in the final
REA dated March 1989. Appendix Figure 2.1 shows the extent
of assessed contamination and identifies the areas
recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted
after the removal of residual radioactive material and prior
to backfilling. Following the gamma scan, soil samples
representative of the 6-inch-thick soil layer at the bottom
of the excavation were collected. These samples were blended
to form composite samples representing the verification areas
(Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined
during the gamma scan, ranged from 13 microroentgens per
hour (uR/h) to 20 pR/h (Appendix Figure 2.1). The results of
analyses for radium-226 in five composite soil samples ranged
from 1.3 picocuries per gram (pCi/g) to 2.7 pCi/g (Appendix
Table 3.1).
3.1.3 Radon Decay-Product Concentration (RDC) Measurement
Based on measurements representing annual averages, the RDCs
were 0.0134 working level (WL) for Building 1, and 0.0109 WL
for Building 2 (Appendix Table 3.2). Appendix Figure 2.1
shows the measurement location in the basement of Building 1,
and the location on the ground floor of Building 2 (the
lowest habitable level of each structure).
4
DOE ID NO.: MS-00062-RS
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property
to the extent required by the EPA standards (40 CFR 192.12,
192.20-23), as indicated in the Certification Data Summary below.
Therefore, the property located at 316 South First East Street, in
Monticello, Utah, is recommended for certification as required by
the Decontamination and Decommissioning Program guidelines, and the
appropriate records should be documented.
Applicability
Certification Data Summary
Standards Survey Results
Habitable Structures
Exposure Rate: Shall not exceed 20 /iR/h
above background.*
Ranges were 12 pR/h to
14 /iR/h for the
basement of Building 1,
and 14 /iR/h to 22 //R/h
for the ground floor of
Building 2.
Radon Decay-Product
Concentrat ion:
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Annual averages were
0.0134 WL for
Building 1, and
0.0109 WL for
Building 2.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background** in
the 15-cm surface layer,
averaged over 100 m3.
Shall not exceed 15 pCi/
above background** in any
15-cm-thick soil layer
more than 15 cm below the
surface, averaged over
100 m3.
< 5 pCi/g above
background.
Soil sample results
ranged from 1.3 pCi/g
to 2.7 pCi/g.
*The background exposure rate is approximately[l5 /uR/h
**The background radium-226 concentration is approximately|2 pCi/g
5
DOE ID NO.: MS-00062-RS
4.0 APPENDIX
Appendix Tables:
Table 3.1 Post-Excavation Sample/Measurement Results
Table 3.2 Radon Decay-Product Concentration (RDC)
Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00062-RS
Address: 316 South First East Street, Monticello, Utah
The analytical uncertainties in the table are reported at the 95-percent
confidence interval.
Exposure- Soil
Rate Range Sample Meas. Radium-226 Potassium Thorium
Area (juR/h) Ticket No. Method* (pCi/g) (pCi/g) (pCi/g)
V-l 13 - 20
V-2 13 - 16
V-3 14 - 17
V-4 14 - 19
V-5 14 - 17
MNK 475 AL
MKQ 905 AL
MKQ 906 AL
MKQ 907 AL
MKQ 908 AL
2.1 ± 0.3 17.7
1.3 ± 0.2 ; 18.2
1.7 ± 0.3 , 18.7
2.5 ± 0.4 J 18.0
2.7 ± 0.4 i 19.8
± 3.0 1.0 ± 0.2
± 3.0 1.0 ± 0.2
± 3.1 1.0 ± 0.2
± 3.0 0.9 + 0.2
± 3.2 1.0 ± 0.2
See Appendix Figure 2.1 for the verification areas.
*AL = Analytical Laboratory
7
Table 3.2
Radon Decay-Product Concentration (RDC) Measurement Results
DOE ID No.: MS-00062-RS
Address: 316 South First East Street, Monticello, Utah
Instrument Type: Terradex Radtrak* Detector
Detector
Number Start Date End Date
Tracks Per
mm'
Radon
Concentrat ion
(pCi/1)
Average
Working
Level (WL)
1652385
1652211
1650005
3315814
3315668
3315632
11-13-89
11-13-89
11-13-89
09-18-91
09-18-91
09-18-91
BUILDING 1
12-12-90
12-12-90
12-12-90
22.1
25.4
24.0
BUILDING 2
10-05-92
10-05-92
10-05-92
21.8
22.3
22.3
2.47
2.85
2.70
0.0124
0.0143
0.0135
Annual Average: 0.0134
2.14
2.20
2.20
0.0107
0.0110
0.0110
Annual Average: 0.0109
See Appendix Figure 2.1 for the measurement locations.
MM-SJW:01-07-93
MS-00062.RS WS
REV052592
8
12 14
42
40
38
36
34
32
30
28
26
24
22
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18
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: SOUTH FIRST EAST STREET
..: ..
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14-19 \
14-16
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36
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is. v-s 12-14 12 14-17
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13-20
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LU Q 12
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V-1 V-1 : BUILDING 2 V
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+
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:Moooeir ei/WiJ mi :•:::••::
10 J L I I I I J I
10 12 14 16 18 20 22 24 26 28 32
THIS DRAWING, PREPARED FOR THE DECONTAMINATION AMD
DECOUMISSIPNIHO PROGRAM, IS FOR THE SOLE JJSE OF THC
U.S. DEPARTMENT OF ENERGY AND (TJ CONTRACTORS. IT IS...,
NOT A LAND SURVEY PUT, UTIUTY LOCATION PLAT, OR OTHER
IMPROVEMENT SURVEY PLAT AND IS NO? TO (C RELIED UPON
FOR THE ESTABLISHMENT OF FENCE, BUILOINO. OR OTHER
fWIWRK ."MMRYfHtm. mtt.:\ : i I
I I I I I I L
40 42 44 46 48 60
1 1 1 1 f "1 1 1—T—T
0
Iv.-.vl
-iv.-.vj-
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12
v-l
16-17
•i i i i i i I ! —
••I i i i i i i"
jLEGEND j
ALL DEPTHS IN: INCHES j i j..
ALL EXPOSURE: RATES IN pR/h
ASSESSED AREA IDENTIFIER; j j
AVERAGE! DEPTH OF ASSESSED CCjNTAMINATIOljl
.AREA OF:ASSESSED CONTAMINATION j j -
POrST-RltMEDIA;L ACTION EXjPOSUljiE-RAjrE RAljJGE
"BC-UNDARY OF EXCAVATION i i i i —
AVERAGE: EXCAVATED iDEPTH FOR YHE DEPOSIT; OF
CONTAMINATION j
VERIFICATION SOIL SAMPLE -AREA jDENTIFIER j
..AND EXCAVATION EXPOSURE-RATE RANGE j
POfST-REMEDlAi ACTION RATION D!ECAY-|PRODUCT
.CWCENTRATIOfl. MEASURE^ENT.LpCATj^N • _
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF:REMEDIAL ACTION: I : :
i i i i t i i ' —
RADI o pojGi eAT: TCS 4 B V I UT"
j ! EXTERIORIEXTENT OF CONTAMINATION j
W.T.WMM1 M. tlftVltM SOS*
IST"
.1 ci. *x *»* rn*. mat mtmmomt «. e* ....
U.S. DEPARTMENT OF ENERGY
OHAND JUWCTION mO«CT» OffKV COLORADO
SI
ESKi
HUM? Si
"8?
316 SOUTH FIRST EAST STREET
MONTICELLO, UTAH
GtoUch, tne. 3=1 rare*—US-0DDB2-RS
+
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
34 36 38 40 42 44 46 48 50
•MO «1
Dl/E ID NO.: MS-00070-RS
Property Address: 432 South First East Street
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
RUST Geotech Inc. pf Energy (DOE)
YES NO NOT TAKEN YES NO NOT TAKEN
Ra-226 is ^ 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
Ra-226 is s= 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2.
In-situ [ ] Lab [X]
Interior gamma is ^ 20 //R/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21.
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Environmental Restoration
Program (Rev. 03/02/87).
[X]* [ ] [ ]
[X] [ ] [ ]
[X] [ ] [ ]
[X] [ ] [ ]
[ ] [X] [ ]
[ ] [ ] [X]
m I 1 I 1
m [ 1 [ ]
IX] [ ] [ ]
IX! I 1 I 1
[ ] \/l I ]
[ ] I ] [/J
COMMENTS: *The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
llilllllllH limn
SFCERTlFED SFMS-00078
DdE ID NO.: MS-00070-RS
RUST GEOTECH INC. RECOMMENDATION
Based on the RUST Geotech Inc. evaluation, I recommend this property for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
[ ] Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental
standards were applied per 40 CFR 192.21.
Program Manager
RUST Geotech Inc.
Date
DOE EVALUATION
EnvironmentaflRestoration Program
Certification Official
Department of Energy
Date
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00070-RS
ADDRESS: 432 SOUTH FIRST EAST STREET
MONTICELLO, UTAH 84535
JULY 1993
Prepared for
Decontamination and Decommissioning Program
Division of Facilities and Site Decommissioning
Department of Energy
by
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
p Hapry A. Perry
Program Manager
RUST Geotech Inc. has been granted authorization to conduct remedial action under
the Decontamination and Decommissioning Program. Remedial action was done in
accordance with the U.S. Environmental Protection Agency "Standards for Cleanup of
Land and Buildings Contaminated with Residual Radioactive Materials from Inactive
Uranium Processing Sites," 40 CFR 192.12, 192.20-23.
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.1.3 Radon Decay-Product Concentration (RDC) Measurement .... 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
DOE ID NO.: MS-00070-RS
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Decontamination and Decommissioning Program with the primary
objective of reducing the potential hazard to the public due to long-term
exposure to low-level radioactivity associated with the offsite mill tailings
derived from the former U.S. Atomic Energy Commission (AEC) uranium
mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to provide
additional sources of vanadium needed during World War II. Various
government agencies operated the mill until 1947. The AEC obtained the
mill in 1948 and operated it through 1959 under cost-type contracts to
provide both uranium and vanadium. Mill operations were terminated on
January 1, 1960.
The mill processed approximately one million tons of ore during the AEC
operations. Throughout the operating period, mill tailings from the
Monticello millsite were removed from the site and used for construction-
related activities in the vicinity.
1.2 Criteria for Remedial Action
The Decontamination and Decommissioning Program adopted the
"Standards for Remedial Actions at Inactive Uranium Processing Sites"
(40 CFR Part 192) for all cleanup activities under the MVP Project.
These standards were prepared by the U.S. Environmental Protection
Agency (EPA) to establish guidelines for the control of tailings piles and
the cleanup of buildings and open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Inclusion Survey Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the EPA
standards. The Remedial Action Contractor was notified of the inclusion
of this property into the Decontamination and Decommissioning Program
and was authorized by the DOE to conduct remedial action as required to
bring the property into conformance with the EPA standards.
1
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owners:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
DOE ID NO.: MS-00070-RS
MS-00070-RS
Parcel No. M-14-1; The SE4 of Lot 4,
Block 3, Monticello Townsite Survey,
Plat A, County of San Juan, State of Utah
432 South First East Street
Monticello, Utah 84535

Residential Simple (RS)
Oak Ridge National Laboratory
January 25, 1990
RUST Geotech Inc.
August 30, 1990
Sonderegger Construction
P.O. Box 6
Monticello, Utah
May 8, 1991
May 31, 1991
Interior: 0 cubic yards
Exterior: 126 cubic yards
316 square meters (m2)
July 1993
2
DOE ID NO.: MS-00070-RS
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual radioactive
material (Appendix Figure 2.1). Once excavation was complete, the
affected areas were resurveyed for possible remaining residual radioactive
material and, upon attaining satisfactory results, were backfilled with
uncontaminated material. The property was restored to a physical
condition comparable to that which existed prior to remedial action
activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified 49 cubic yards of contamination,
ranging from 6 inches to 12 inches deep, within the property. The
remedial action process included the removal of approximately 126 cubic
yards of residual radioactive material, 12 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00070-RS
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by RUST Geotech Inc. during
June 1990, as described in the final REA dated August 1990.
Appendix Figure 2.1 shows the extent of assessed contamination
and identifies the areas recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to backfilling.
Following the gamma scan, soil samples representative of the
6-inch-thick soil layer at the bottom of the excavation were
collected. These samples were blended to form composite
samples representing the verification areas (Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 14 microroentgens per hour Ot/R/h)
to 24 jjR/h (Appendix Figure 2.1). The results of analyses for
radium-226 in three composite soil samples ranged from
3.5 picocuries per gram (pCi/g) to 4.6 pCi/g (Appendix Table 3.1).
3.1.3 Radon Decay-Product Concentration (RDC) Measurement
Based on measurements representing an annual average, the
RDC was 0.0052 working level (WL), as indicated in Appendix
Table 3.2. Appendix Figure 2.1 shows the measurement location
on the ground floor (the lowest habitable level of the structure).
4
DOE ID NO.: MS-00070-RS
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by the EPA standards (40 CFR 192.12, 192.20-23),
as indicated in the Certification Data Summary below.
Therefore, the property located at 432 South First East Street, in
Monticello, Utah, is recommended for certification as required by the
Decontamination and Decommissioning Program guidelines, and the
appropriate records should be documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Standards
Shall not exceed 20 //R/h
above background.*
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Results
Range for the ground
floor was 14 //R/h to
15 fjR/h.
Annual average was
0.0052 WL.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background1 in the
15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above background1 in any
15-cm-thick soil layer
more than 15 cm below
the surface, averaged
over 100 m2.
< 5 pCi/g above
background.
Soil sample results
ranged from 3.5 pCi/g
to 4.6 pCi/g.
•The background exposure rate is approximately 15 //R/h.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
1
DOE ID NO.: MS-00070-RS
4.0 APPENDIX
Appendix Tables:
Table 3.1 Post-Excavation Sample/Measurement Results
Table 3.2 Radon Decay-Product Concentration
Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
MM-SJW:07-09-93
MS-00070.RS WP51
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00070-RS
Address: 432 South First East Street, Monticello, Utah
The analytical uncertainties in the table are reported at the 95-percent confidence
interval. A less-than sign (<) indicates that the minimum detection limit based on
Compton background was reached.
Exposure- Soil
Rate Range Sample Meas. Radium-226 Potassium Thorium
Area (//R/h) Ticket No. Method* (pCi/g) (pCi/g) (pCi/g)
V-l 14 - 24 NAB 988 AL 4.6 ± 0.6 24.6 ± 3.4 0.8 ± 0.3
V-2 14-20 NAB 989 AL 4.1 ± 0.6 23.7 ± 3.3 0.9 ± 0.3
V-3 14-20 NAB 990 AL 3.5 ± 0.5 24.9 ± 3.4 < 0.2
See Appendix Figure 2.1 for the verification areas.
*AL = Analytical Laboratory
7
Table 3.2
Radon Decay-Product Concentration Measurement Results
DOE ID No.: MS-00070-RS
Address: 432 South First East Street, Monticello, Utah
Instrument Type: Terradex Radtrak® Detector
Detector
Number Start Date End Date
Tracks Per
mm2
Radon
Concentration
(pCi/L)
Working
Level
3463071
3463043
3463059
01-07-92
01-07-92
01-07-92
01-06-93
01-06-93
01-06-93
10.3
8.9
10.9
1.06
0.92
1.13
0.0053
0.0046
0.0057
Annual Average: 0.0052
See Appendix Figure 2.1 for the measurement location.
8
14 40 12 16 18 20 30 32 34 38 10 22 24 26 28 36 + 30
LEGEND
ALL DEPTHSIN INCHES ..
ALL EXPOSURE RATES IN 28 28 uR/h
® ASSESSED AREA IDENTIFIER
<D AVERAGE DEPTH OF ASSESSED CONTAMINATION
cr (D 26 AREA OF ASSESSED CONTAMINATION 26 [v.-.vt
15-17 EXPOSURE-RATE RANGE POST-REMEDIAL ACTION 12-15 0 0
BOUNDARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE
CONTAMINATION
DEPOSIT OR 12 24 24
V-1 SAMPLE AREA IDENTIFIER VERIFICATION SOIL
AND EXCAVATION EXPOSURE-RATE RANGE 16-17 or
15-17 co POST-rREMEDIAL ACTION RADON DECAY-PRODUCT ROC CONCENTRATION MEASUREMENT LOCATION .;
ASSESSED CONTAMINATION NOT FOUND AT TIME
- ONE STORY -
FRAME HOUSE
W/CRAWL
SPACE :
22 22 tO
< V-3 V-2 Lu ASSESSED CONTAMINATION NOT
DF REMEDIAL ACTION 14-20 14-20
CO
14-15 ; O ;
A : X 20 20 ZD
o CO
RDC
18 18 12
12
12>---. SH ED V-1 15-17
14-24
mm 16 16 IOLOGIGALL AS 4 RAD Bu LT
FIGURE 2JL
EXTERIOR EXTENT OF CONTAMINATION
14 14
NO. DATE REVISIONS BT CK. A.E. APP. NO. DATE REVISIONS BV CK. A.E. APP
RESIDENCE—NO. OF OCCUPANTS U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE. COLORADO NON-RESIDENCE —MAN* HRS./WK
DESIGNE DAT fa 12 THIS DRAWING. PREPARED FOR THE DECONTAMINATION AND :
DECOMMISSIONING PROGRAM. IS FOR THE SOLE USE OF THE °
U.S. DEPARTMENT OF ENERGY AND ITS CONTRACTORS. IT IS E
NOT A LAND SURVEY PLAT, UTILITY LOCATION PLAT; OR OTHER
IMPROVEMENT SURVEY PLAT AND :IS NOT TO BE RELIED UPON
FOR THE ESTABLISHMENT OF FENCE, BUILDING. OR. OTHER : -
FUTURE IMPROVEMENT LINES.
12 INSTRUMENT NO. SURVEYOR DRAWN SCALE IN FEET 7-7" 432 SOUTH FIRST EAST STREET
MONTICELLO, UTAH
7-ti Y CHECKED
3.-IS PROJ. ENG.:
SUBMITTED APPROVAL DATE APPROVAL DOE DATE 20; 10; o; 20;
Y ; RM00070V 07/15/93 TUT/629
40--NORTH SURVEY OATE TIME
DOE ID NO. MS-00070-RS
MKT VERIFICATION DATE
I 1 l I I I I J owe NOJ—Q00070—V1 10 SHT
22 24 20 26 28 30 32 34 36 38 12 14 16 18 40
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS. INC.
GRAND JUNCTION OFFICE
P. O. BOX 2567
GRAND JUNCTION, COLORADO 81502
W2sm
Donald N. Leske
Project Manager, Monticello Projects
U.S. Department of Energy
P. 0. Box 2567
Grand Junction, 81502
Dear Mr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil, indoor radon daughter
concentration, and indoor gamma exposure rate at this property.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Gretchen A. Pierce
MVP/IVC Project Manager
Environmental Assessment Group
Location Number: MS00070
Location Address: 432 South 1st East Street
Monticello. Utah 84535
Property Owner:

Attachments
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
432 SOUTH 1ST EAST STREET
MONTICELLO, UTAH (MS00070)
AR. Jones
January 1994
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
ESrmODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews : 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
Radon Measurement Results 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from 432 South 1st East Street,
Monticello, Utah (MS00070) 5
v
ACKNOWTJErXJMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge M. K. Jensen for analysis of soil samples and G.S. Stowe and M.K. Jensen
for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1991, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at 432
South 1st East Street, Monticello, Utah. The Environmental Technology Section
(ETS) of Oak Ridge National Laboratory was assigned the responsibility of
verifying the data supporting the adequacy of remedial action and confirming the
site's compliance with DOE guidelines. The ETS found that the site successfully
meets the DOE remedial action objectives. Procedures used by the ETS are
described in the Environmental Technology Section Procedures Manual (ORNL,
1993).
ix
2
During 1991, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a private residence located at 432 South 1st East Street, Monticello, Utah.
The remedial action plan required excavation of all exterior contamination. When the
excavation was completed, the property was resurveyed, including soil sampling, to ensure
the removal of all rontamination, backfilled with uncontaminated material, and restored to
a condition comparable to that which existed prior to remedial action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Environmental Technology Section (ETS) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the 432 South 1st
East Street site. This report describes the methods and results of that verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Dociiment Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 49 yd3 of mill tailings
6 to 12 inches deep. However, during the actual removal process, a total of 126 yd3 of
contaminated earth and uranium mill tailings, 12 inches deep were removed from a 316 m2
area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of gamma scans with a scintillometer, ground-level
and basement scans of the building and a surface scan of the exterior and soil sampling.
Samples representative of the bottom 15-cm (6-in.) soil layers of 3 excavated areas were
collected and blended to form representative composite soil samples for each verification
area.
« 4 y *
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Gamma exposure rate measurements taken by Geotech at the ground-level of the
residence ranged from 14 to 15 /iR/h. Exterior surface gamma measurements taken from
the excavated areas prior to backfilling ranged from 14 to 24 /iR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. There were 3 excavated areas for this
property. Geotech's analysis of these samples showed ^Ra concentrations from 3.5 to 4.6
pCi/g in the composite sample. ORNL ETS obtained a percentage of these soil samples
and performed a confirmatory analysis, which showed 226Ra concentrations from 3.4 to 5.0
pCi/g. These values are below the DOE guideline value of 15 pCi/g for soil layers >15
cm below the surface (Table 1). Results of Geotech and ORNL soil sample analyses are
given in Table 2.
Radon Measurement Results
Radon decay-product concentration (RDC) measurements for this site were
determined by the alpha-track method. To monitor radon levels, Geotech placed three
Alpha-track detectors on the ground floor of the residence located on this property for a
period of approximately one year (from January 7,1992 to January 6, 1993). The average
annual working level (WL) of radon progeny concentration, as determined by the
Tech./Ops-Landauer Corporation, was 0.0052, which is well below the 0.03-WL guideline
given in Table 1.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Exposure to 222Rn
progeny
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
Average annual radon proge-
ny concentration (including
background)
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
0.03 WL
(DOE 1990)
5
Table 2. Results of ORNL analysis of Geotech soil samples
from 432 South 1st East Street, Monticello Utah (MS00070)
^Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No.' (cm)
XI NAB-988 >15 5.0 4.6
X2 NAB-989 >15 3.7 4.1
X3 NAB-990 >15 3.4 3.5
" An X-type sample is a split of the sample taken by the remedial action contractor.
b Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
REFERENCES
Abramiuk L N.et aL1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00070, Address: 432 South 1st East Street, Monticello,
Utah 84535, Geotech, Grand Junction, Colorado, July 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1993. Environmental Technology Section Procedures Manual ORNL/TM-
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
X
DOE ID NO. : MS- DO 0 9 % ~ ffS
Property Address: PVfl SquAh Yf}/r(J EccS>i ^iVee"
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
Chem-Nuclear Geotech. Inc.
YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2.
In-situ [ ] Lab [XJ
Interior gamma is < 20 pR/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21.
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Decontamination and
Decommissioning
Program (Rev. 03/02/87).
[X]'
txi
IX)
[ J
[ ]
t i
[ ]
txi
[ ]
[ i
t J
[ ]
[ ]
[ ]
00
U.S. Department
of Energy (DQEi
YES NO NOT TAKEN
IXJ [ ) t ]
[)0
[tf
[ )
[ ]
[ ]
[ ]
[ ]
{ ]
I )
[ }
[ 1
[ ]
COMMENTS: *The excavations were backfilled with materials that were measured
at the source showing that the Ra-226 concentrations are in the range of
normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
CHEM-NUCLEAR GEOTECH, INC., RECOMMENDATION
Based on the Chem-Nuclear Geotech, Inc., evaluation, I recommend this property
for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
Harry A. Perj#7 Date
Decontamination and Decommissioning Program Manager
Chem-Nuclear Geotech, Inc.
DOE EVALUATION
[V] Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental standards
were applied per 40 CFR 192.21.
Decontamination and Decommissioning Program Date
Certification Official
Department of Energy
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00098-RS
ADDRESS: 248 SOUTH THIRD EAST STREET
MONTICELLO, UTAH 84535
MAY 1993
Prepared for
Decontamination and Decommissioning Program
Division of Facilities and Site Decommissioning
Department of Energy
by
Chem-Nuclear Geotech, Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
Harry Perry
Program Director
Chem-Nuclear Geotech, Inc., has been granted authorization to conduct remedial
action under the Decontamination and Decommissioning Program. Remedial action
was done in accordance with the Environmental Protection Agency Standards for
Cleanup of Lands and Buildings Contaminated with Residual Radioactive Material
from Inactive Uranium Processing Sites, 40 CFR 192.12, 192.20-23.
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey . 4
3.1.3 Radon Decay-Product Concentration (RDC) Measurement .... 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
i
DOE ID NO.: MS-00098-RS
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Decontamination and Decommissioning Program with the primary
objective of reducing the. potential hazard to the public due to
long-term exposure to low-level radioactivity associated with the
offsite mill tailings derived from the former U.S. Atomic Energy
Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to
provide additional sources of vanadium needed during World War II.
Various government agencies operated the mill until 1947. The AEC
obtained the mill in 1948 and operated it through 1959 under cost-
type contracts to provide both uranium and vanadium. Mill
operations were terminated on January 1, 1960.
The mill processed approximately one million tons of ore during the
AEC operations. Throughout the operating period, mill tailings from
the Monticello millsite were removed from the site and used for
construction-related activities in the vicinity.
1.2 Criteria for Remedial Action
The Decontamination and Decommissioning Program adopted the
"Standards for Remedial Action at Inactive Uranium Processing Sites"
(40 CFR Part 192) for all cleanup activities under the MVP Project.
These standards were prepared by the U.S. Environmental Protection
Agency (EPA) to establish guidelines for the control of tailings
piles and the cleanup of buildings and open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Inclusion Survey Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the
EPA standards. The Remedial Action Contractor was notified of the
inclusion of this property into the Decontamination and
Decommissioning Program and was authorized by the DOE to conduct
remedial action as required to bring the property into conformance
with the EPA standards.
DOE ID NO.: MS-00098-RS
1.3 Summary of Remedial Action
DOE ID No.: MS-00098-RS
Legal Description:
Beginning 223 feet north of the SE corner of Block 11, Monticello Townsite
Survey; west 60 feet, north 132 feet, east 60 feet, south 132 feet to the
point of beginning, City of Monticello, County of San Juan, State of Utah
Property Address:
Property Owners:
Property Category.:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
248 South Third East Street
Monticello, Utah 84535

Residential Simple (RS)
Oak Ridge National Laboratory
June 19, 1990
Chem-Nuclear Geotech, Inc.
January 4, 1991
Sonderegger Construction
P.O. Box 6
Monticello, Utah
April 29, 1991
May 31, 1991
Interior: 0 cubic yards
Exterior: 73 cubic yards
220 square meters (m2)
May 1993
2
DOE ID NO.: MS-00098-RS
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual
radioactive material (Appendix Figure 2.1). Once excavation was
complete, the affected areas were resurveyed for possible remaining
residual radioactive material and, upon attaining satisfactory
results, were backfilled with uncontaminated material. The property
was restored to a physical condition comparable to that which existed
prior to remedial action activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified contamination, ranging from
6 inches to 36 inches deep, within the property. The remedial action
process included the removal of approximately 73 cubic yards of
residual radioactive material, ranging from 6 inches to 48 inches
deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00098-RS
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by Chem-Nuclear
Geotech, Inc., during August 1990, as described in the final
REA dated January 1991. Appendix Figure 2.1 shows the extent
of assessed contamination and identifies the areas recommended
to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to
backfilling. Following the gamma scan, soil samples
representative of the 6-inch-thick soil layer at the bottom of
the excavation were collected. These samples were blended to
form composite samples representing the verification areas
(Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined
during the gamma scan, ranged from 13 microroentgens per
hour (pR/h) 24 fiR/h (Appendix Figure 2.1). The results of
analyses for radium-226 in nine composite soil sample ranged
from 2.5 picocuries per gram (pCi/g) to 11.2 pCi/g (Appendix
Table 3.1). Areas V-4 through V-9 were removed and verified as
portions of Areas V-l, V-3, V-4, V-8, V-9, and V-10 under
MS-00199-RS, the property to the west.
3.1.3 Radon Decay-Product Concentration (RDC) Measurement
Based on measurements representing an annual average, the RDC
was 0.0079 working level (WL), as indicated in Appendix
Table 3.2. Appendix Figure 2.1 shows the measurement location
in the basement (the lowest habitable level of the structure).
4
DOE ID NO.: MS-00098-RS
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property
to the extent required by the EPA standards (40 CFR 192.12,
192.20-23), as indicated in the Certification Data Summary below.
Therefore, the property located at 248 South Third East Street, in
Monticello, Utah, is recommended for certification as required by
the Decontamination and Decommissioning Program guidelines, and the
appropriate records should be documented.
Certification Data Summary
Applicability Standards Survey Results
Habitable Structures
Exposure Rate: Shall not exceed 20 A/R/h
above background.*
Range for the
basement was 12 //R/h
to 15 pR/h.
Radon Decay-Product
Concentration:
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Annual average was
0.0079 WL.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background** in the
15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above background** in any
15-cm-thick soil layer
more than 15 cm below the
surface, averaged over
100 m2.
< 5 pCi/g above
background.
Soil sample results
ranged from 2.5 pCi/g
to 11.2 pCi/g.
*The background exposure rate is approximately 16 jyR/h.
**The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00098-RS
4.0 APPENDIX
Appendix Tables:
Table 3.1 Post-Excavation Sample/Measurement Results
Table 3.2 Radon Decay-Product Concentration (RDC)
Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00098-RS
Address: 248 South Third East Street, Monticello, Utah
The analytical uncertainties in the table are reported at the 95-percent
confidence interval. A less-than sign (<) indicates that the minimum detection
limit based on Compton background was reached.
Exposure- Soil
Rate Range Sample Meas. Radium-226 Potassium Thorium
Area (^R/h) Ticket No. Method* (pCi/g) (pCi/g) (pCi/g)
V-l 14 - 17
V-2 14 - 17
V-3 13 - 24
V-4** 17 - 20
V-5** 17 - 19
V-6** 17 - 19
V-7** 14 - 19
V-8** 14 - 19
V-9** 15 - 22
NAE 970 AL
NAE 971 AL
NAB 985 AL
NAE 963 AL
NAE 968 AL
NAE 969 AL
NAB 978 AL
NAB 979 AL
NAB 980 AL
4.4 ± 0.3 20.4
4.3 ± 0.3 17.8
2.5 ± 0.2 24.3
9.4 ± 0.7 18.6
8.3 ± 0.6 18.6
8.2 ± 0.6 17.9
5.6 ± 0.4 15.1
5.0 ± 0.3 23.5
11.2 ± 0.7 23.1
+ 2.2 1.0 ± 0.1
± 2.0 1.0 ± 0.1
± 1.7 < 0.2
± 2.1 0.6 ± 0.1
± 2.1 1.3 ± 0.2
± 2.1 < 0.2
± 1.1 0.9 ± 0.1
+ 1.7 < 0.2
+ 1.6 < 0.3
See Appendix Figure 2.1 for the verification areas.
*AL = Analytical Laboratory
**Areas V-4 through V-9 were verified as portions of Areas V-l, V-3, V-4, V-8,
V-9, and V-10 under MS-00199-RS.
7
Table 3.2
Radon Decay-Product Concentration (RDC) Measurement Results
DOE ID No.: MS-0.0098-RS
Address: 248 South Third East Street, Monticello, Utah
Instrument Type: Terradex Radtrak* Detector
Radon Average
Detector Tracks Per Concentration Working
Number Start Date End Date mma (pCi/1) Level (WL)
3468165 01-08-92
3463070 01-08-92
3468104 01-08-92
01-06-93 15.7
01-06-93 14.7
01-06-93 17.1
1.53 0.0077
1.53 0.0077
1.67 0.0084
Annual Average: 0.0079
See Appendix Figure 2.1 for the measurement location.
MM-DNM:04-09-93
MS-00098.RS WP51
REV033092
8
Y
•
SCALE IN FEET:
.2.0. .10 Q 2.0.
^ ;' RU00&98V 04/26/93 TUT/329
J L
.40. IF ;NORTH
THIS DRAWING, PREPARED FOR THE DECONTAMINATION AND:
DECOMMISSIONING PROGRAM. IS FOR THElSOLE USE OF THE
U.S. DEPARTMENT OF ENERGY AND ITS CONTRACTORS. IT IS
NOT A:LAND SURVEY PLAT, UTILITY LOCATION PLAT,; OR OTHER
IMPROVEMENT SURVEY PLAT ANDUS NOT TO BE RELIED UPON
FOR THE ESTABLISHMENT OF FENCE, BUILDING. OR? OTHER :
. FUTURE IMPROVEMENT LINES....:
(6) AVERAGE
36 V-3 V-9
13-24 15-22
mm V-8
n 14-19
•:•::•:•:•:•:•/:
;•:•./
iv.-.vj V-7 48 24 t
SHED
12-15 14-19
VH ill
: V-6 12
17-19 V-3
10 V-1 13-24
16-17 >l:.v:o:-/ V-1
777 14-17 If-:/ RDC
LLL
OF V-5 :15-17
17-19
\\ 6
O : V-2 i—
14-17 RDC QC
IE CO
ONE STORY :
FRAME HOUSE
W/BASEMENT
co 6 >: <
OC
\
ZJZ f • * *
12-15 V-4
X 17-20
ZD
o 15-17 CO
—e-e-e-ocr-o-i V-3
EXTERIOR 7* 13-24
HO. OATE REVISIONS
LEGEND.
T r
ALL DEPTHS IN INCHES
ALL EXPOSURE:RATES IN pR/h
ASSESSED AREA IDENTIFIER!
DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION i-
POST—REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION
AVERAGE:EXCAVATED DEPTH:
CONTAMINATIONi
FOR THE DEPOSIT: OF
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE -
POST—REMEDIAL ACTION RADON DECAY-PRODUCT
CONCENTRATION MEASUREMENT LOCATION
ASSESSED CONTAMINATION NOT FOUND AT TIME
REMEDIAL ACTION i
RADIOLOGICAL. AS-4BHIIUT
ElMEEJZZL''
EXTENT OF CONTAMINATION
J I I L
10 12 14 16
J L
18
J I I L
20 22 24 26
J L_
28
RESIDENCE—NO. OF OCCUPANTS
NON-RESIOENCE—MAN-HRS./WK.
INSTRUMENT NO. SURVEYOR
SURVEY OATE
VERIFICATION
30
CK. A.E. APP. NO. OATE CK. A.E. APP.
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE, COLORADO
JCllfM
£3i 248 SOUTH THIRD EAST STREET
MONTICELLO, UTAH
32
Geotech, Inc.
~34
APPROVAL DOE
MS-00098-RS
3-B00098-V1 SHTI QF1
36 38 4C
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS. INC.
GRAND JUNCTION OFFICE
P. 0. BOX 2567
GRAND JUNCTION. COLORADO 81502
JAN 2 8 1994
Donald N. Leske
Project Manager, Monticello Projects
U.S. Department of Energy
P. 0. Box 2567
Grand Junction, 81502
Dear Mr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil, indoor radon daughter
concentration, and indoor gamma exposure rate at this property.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Gretchen A. Pierce
MVP/IVC Project Manager
Environmental Assessment Group
MS00098-RS
248 South 3rd East Street
Monticello. Utah 84535

Location Number:
Location Address:
Property Owner:
Owner Address:
Attachments
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
248 SOUTH 3RD EAST STREET
MONTICELLO, UTAH (MS00098-RS)
A.R. Jones
January 1994
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
Radon Measurement Results 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from 248 South 3rd East Street,
Monticello, Utah (MS00098-RS) 5
v
ACKNOWLEDGMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge M. K. Jensen for analysis of soil samples and M. K. Jensen and G. A Pierce
for technical reviews.
ix
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1991, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at 248
South 3rd East Street, Monticello, Utah. The Environmental Technology Section
(ETS) of Oak Ridge National Laboratory was assigned the responsibility of
verifying the data supporting the adequacy of remedial action and confirming the
site's compliance with DOE guidelines. The ETS found that the site successfully
meets the DOE remedial action objectives. Procedures used by the ETS are
described in the Environmental Technology Section Procedures Manual (ORNL,
1993).
ix
4 *
RESULTS OF THE JJNDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT 248 SOUTH 3RD EAST STREET
MONTICELLO, UTAH (MS00098-RS)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War II. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Environmental
Assessment Group in the Environmental Technology Section of the Health Sciences Research
Division at Oak Ridge National Laboratory under DOE contract DE-AC05-84OR21400 with Martin
Marietta Energy Systems, Inc.
2
During 1991, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a private residence located at 248 South 3rd East Street, Monticello, Utah.
The remedial action plan required excavation of all exterior contamination. When the
excavation was completed, the property was resurveyed, including soil sampling, to ensure
trie removal of all contamination, backfilled with uncontaminated material, and restored to
a condition comparable to that which existed prior to remedial action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. Tlie Environmental Technology Section (ETS) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the 248 South 3rd
East Street site. This report describes the methods and results of that verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified mill tailings 6 to 36
inches deep. During the actual removal process, a total of 73 yd3 of contaminated earth
and uranium mill tailings, 6 to 48 inches deep were removed from a 220 m2 area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of gamma scans with a scintillometer, ground-level
and basement scans of the building and a surface scan of the exterior and soil sampling.
Samples representative in the bottom 15-cm (6-in.) soil layers of 3 excavated areas were
collected and blended to form representative composite soil samples for verification areas
VI through V3. Areas V4 through V9 soil samples were taken and verified as portions of
Areas VI, V3, V4, V9, V9, and V10 under MS00199-RS, the property to the west.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Gamma exposure rate measurements taken by Geotech at the ground-level of the
residence ranged from 12 to 15 /iR/h. Exterior surface gamma measurements taken from
the excavated areas prior to backfilling ranged from 13 to 24 ^R/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. There were 3 excavated areas and
portions of 6 verification areas from MS00199. Geotech's analysis of these samples
showed ^Ra concentrations from 2.5 to 11.2 pCi/g in the composite sample. ORNL ETS
obtained a percentage of these soil samples and performed a confirmatory analysis, which
showed ^Ra concentrations from 4.0 to 8.0 pCi/g. These values are below the DOE
guideline value of 15 pCi/g for soil layers >15 cm below the surface (Table 1). Results of
Geotech and ORNL soil sample analyses are given in Table 2.
Radon Measurement Results
Radon decay-product concentration (RDC) measurements for this site were
determined by the alpha-track method. To monitor radon levels, Geotech placed three
Alpha-track detectors on the ground floor of the residence located on this property for a
period of approximately one year (from January 8, 1992 to January 6, 1993). The average
annual working level (WL) of radon progeny concentration, as determined by the
TechVOps-Landauer Corporation, was 0.0079, which is well below the 0.03-WL guideline
given in Table 1.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m* area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to 222Rn Average annual radon proge- 0.03 WL
progeny ny concentration (including
background)
(DOE 1990)
5
Table 2. Results of ORNL analysis of Geotech soil samples
from 248 South 3rd East Street, Monticello Utah (MS00098-RS)
^Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech •
No." No.b (cm)
XI NAE-970 >15 4.0 4.4
X6 NAE-969 >15 8.0 8.2
" An X-type sample is a split of the sample taken by the remedial action contractor.
* Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
REFERENCES
Abramiuk I. N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00098-RS, Address: 248 South 3rd East Street,
Monticello, Utah 84535, Geotech, Grand Junction, Colorado, May 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1993. Environmental Technology Section Procedures Manual. ORNL
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
DEC l 8 1996
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00100-CS
ADDRESS: 333 SOUTH SECOND EAST STREET
MONTICELLO, UTAH 84535
DECEMBER 1993
Prepared for
Environmental Restoration Program
Division of Facilities and Site Decommissioning
Department of Energy
by
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
Ha/ry A. Pern/
Program Manager
RUST Geotech Inc. has been granted authorization to conduct remedial action under
the Environmental Restoration Program. Remedial action was done in accordance
with the U.S. Environmental Protection Agency "Standards for Cleanup of Land and
Buildings Contaminated with Residual Radioactive Materials from Inactive Uranium
Processing Sites," 40 CFR 192.12, 192.20-23.
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.1.3 Radon Decay-Product Concentration (RDC) Measurement .... 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
i
DOE ID NO.: MS-00100-CS
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Environmental Restoration Program with the primary objective of
reducing the potential hazard to the public due to long-term exposure to
low-level radioactivity associated with the offsite mill tailings derived from
the former U.S. Atomic Energy Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to provide
additional sources of vanadium needed during World War II. Various
government agencies operated the mill until 1947. The AEC obtained the
mill in 1948 and operated it through 1959 under cost-type contracts to
provide both uranium and vanadium. Mill operations were terminated on
January 1, 1960.
The mill processed approximately one million tons of ore during the AEC
operations. Throughout the operating period, mill tailings from the
Monticello millsite were removed from the site and used for construction-
related activities in the vicinity.
1.2 Criteria for Remedial Action
The Environmental Restoration Program adopted the "Standards for
Remedial Actions at Inactive Uranium Processing Sites" (40 CFR Part 192)
for all cleanup activities under the MVP Project. These standards were
prepared by the U.S. Environmental Protection Agency (EPA) to establish
guidelines for the control of tailings piles and the cleanup of buildings and
open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE), which determined that the property
contained mill tailings (residual radioactive material) exceeding the EPA
standards. The Remedial Action Contractor was notified of the inclusion
of this property into the Environmental Restoration Program and was
authorized by the DOE to conduct remedial action as required to bring the
property into conformance with the EPA standards.
1
DOE ID NO.: MS-00100-CS
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
MS-00100-CS
Parcel No. M-64; Lots 1, 3, and 4,
Block 10, City of Monticello, County of
San Juan, State of Utah
333 South Second East Street
Monticello, Utah 84535

Commercial Structure (CS)
Not applicable; historical inclusion by
the DOE
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor
for Phases I and II:
Pre-Construction Conference
Record for Phase I:
Pre-Construction Conference
Record for Phase II:
Notice of Final Completion
Inspection for Phases I and II:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
June 8, 1984
RUST Geotech Inc.
January 28, 1987
Bayless & Bayless, Inc.
435 East 1st Street
Pueblo, Colorado
July 14, 1988
August 1, 1988
September 29, 1988
Interior: 0 cubic yards
Exterior: 9,074 cubic yards
12,340 square meters (m2)
December 1993
2
DOE ID NO.: MS-00100-CS
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual radioactive
material (Appendix Figures 2.1a and 2.1b). Interior assessed Area A
(concrete masonry wall) was excluded from remedial action based on
gamma exposure rates and pre-remedial radon decay-product
concentration (RDC) measurements that did not exceed the EPA
standards, as discussed in the REA. Once excavation was complete, the
affected areas were resurveyed for possible remaining residual radioactive
material and, upon attaining satisfactory results, were backfilled with
uncontaminated material. The property was restored to a physical
condition comparable to that which existed prior to remedial action
activities.
2.2 Previously Unidentified Contamination
The radiological assessment (excluding assessed Area A) identified
2,272 cubic yards of contamination, ranging from 6 inches to 96 inches
deep, within the property. The remedial action process included the
removal of approximately 9,074 cubic yards of residual radioactive
material, ranging from 6 inches to 120 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figures 2.1a and 2.1b.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00100-CS
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by Bendix Field Engineering
Corporation during October 1985, as described in the final REA
dated January 1987. An additional radiological survey was
conducted by Rust Geotech Inc. during April 1988. Appendix
Figures 2.1a and 2.1b show the extent of assessed contamination
and identify the areas recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to backfilling.
Following the gamma scan, soil samples representative of the
6-inch-thick soil layer at the bottom of the excavation were
collected. These samples were blended to form composite
samples representing the verification areas (Appendix
Figures 2.1a and 2.1b).
Exterior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 12 microroentgens per hour (jjR/h)
to 68 yR/h (Appendix Figures 2.1a and 2.1b). Elevated exposure
rates in Area V-17 were associated with material under the footing
of the building. This material was not removed because it did not
cause the interior gamma exposure rates to exceed the EPA
standards. Elevated exposure rates in Areas V-24, V-82, V-88,
and V-109 were associated with materials at the bottom of the
excavation that did not exceed the EPA standard. The results of
analyses for radium-226 in 148 composite soil samples ranged
from 0.4 picocuries per gram (pCi/g) to 14.7 pCi/g (Appendix
Table 3.1).
3.1.3 Radon Decay-Product Concentration (RDC) Measurement
Based on measurements representing an annual average, the RDC
was 0.0184 working level (WL), as indicated in Appendix
Table 3.2. Appendix Figure 2.1a shows the measurement location
on the ground floor (the lowest habitable level of the structure).
The RDC measurements were not taken in the area of highest
gamma exposure rates because of the unsuitable environment
inside the smoke room.
4
DOE ID NO.: MS-00100-CS
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by the EPA standards (40 CFR 192.12, 192.20-23),
as indicated in the Certification Data Summary below.
Therefore, the property located at 333 South Second East Street, in
Monticello, Utah, is recommended for certification as required by the
Environmental Restoration Program guidelines, and the appropriate
records should be documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Standards
Shall not exceed 20 /vR/h
above background.*
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Results
Range for the ground
floor was 12 ji/R/h to
29 //R/h.
Annual average was
0.0184 WL.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above backgroundT in the
15-cm surface layer,
averaged over 100 m2.
Shall nol exceed 15 pCi/g
above backgroundt in any
15-cm-thick soil layer
more than 15 cm below
the surface, averaged
over 100 m2.
< 5 pCi/g above
background.
Soil sample results
ranged from 0.4 pCi/g to
14.7 pCi/g.
*The background exposure rate is approximately 16 /yR/h.
fThe background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00100-CS
4.0 APPENDIX
Appendix Tables:
Table 3.1 Post-Excavation Sample/Measurement Results
Table 3.2 Radon Decay-Product Concentration
Measurement Results
Appendix Figures:
Figure 2.1a Interior and Exterior Extent of Contamination -
RADIOLOGICAL AS-BUILT
Figure 2.1b Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
MM-SJW:07-06-93
MS-00100.CS WP51
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00100-CS
Address: 333 South Second East Street, Monticello, Utah
The analytical uncertainties in the table are reported at the 95-percent confidence
interval. A less-than sign {<) indicates that the minimum detection limit based on
Compton background was reached.
Area
Exposure- Soil
Rate Range Sample
(//R/h) Ticket No.
Meas. Radium-226 Potassium Thorium
Method* (pCi/g) (pCi/g) (pCi/g)
V-l
V-2
V-3
V-4
V-5
V-6
V-7
V-8
V-9
V-10
V-ll
V-12
V-13
V-14
V-15
V-16
V-17
V-18
V-19
V-20
V-21
V-22
V-23
V-24
V-25
V-26
15 - 18
15 - 23
12 - 17
12 - 14
14 - 18
14 - 18
13 - 14
13 - 15
13 - 15
13 - 15
13 - 15
12 - 14
14 - 23
14 - 24
14 - 17
14
12 - 61
18 - 21
17 - 19
18 - 21
18 - 24
18 - 23
17 - 21
17 - 68
18 - 21
18 - 21
MNK 601
MNK 602
MNK 603
MNK 604
MNK 605
MNK 606
MNK 607
MNK 608
MNK 609
MNK 610
MNK 611
MNK 612
MNK 613
MNK 614
MNK 615
MNK 616
MNK 617
MNK 618
MNK 619
MNK 620
MNK 621
MNK 622
MNK 623
MNK 624
MNK 625
MNK 501
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
7.0.
2.9
2.5
2.7
2.1
2.2
1.8
0.7
1.0
2.3
2.3
1.1
6.8
1.6
1.5
1.1
1.5
2.0
1.8
1.0
0.5
0.4
0.3
0.7
0.3
0.2
0.8
0.4
0.4
0.4
0.4
0.3
0.2
0.2
0.4
18.4
19.5
18.3
17.2
17.1
15.5
14.6
13.
17.
15.
14.
14.0
16.1
.9
.2
.7
.2
15
16
16
17
17
17
16
18
17.1
17.4
18.2
17.4
15.4
3.6
3.7
3.5
3.4
3.3
3.1
3.0
3.0
3.4
3,
3,
3,
3,
3.
3.2
3.3
3.4
3.5
3.5
3.4
3.5
3.4
3.5
3.6
3.5
3.4
0.2
0.7
1.1
1.1
1.0
1.1
0.8
1.1
1.1 ±
1.0 ±
±
+
1.1
1.2
1.1
0.2
1.0
1.1
1.3
1.2
1.1
1.2
1.1
1.4
0.
0.
0.
0.
0,
0.2
0.3
0.3
0.3
0.3
0.3
0.3
0.2
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
*AL = Analytical Laboratory
7
Table 3.1 (continued)
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00100-CS
Address: 333 South Second East Street, Monticello, Utah
Exposure- Soil
Rate Range Sample Meas. Radium-226 Potassium Thorium
Area (//R/h) Ticket No. Method* (pCi/g) (pCi/g) (pCi/g)
V-27
V-28
V-29
V-30
V-31
V-32
V-33
V-34
V-35
V-36
V-37
V-38
V-39
V-40
V-41
V-42
V-43
V-44
V-45
V-46
V-47
V-48
V-49
V-50
V-51
V-52
V-53
V-54
V-55
V-56
V-57
17 - 19
18 - 28
18 - 26
16 - 23
17 - 19
18 - 24
16 - 19
18 - 21
19 - 28
17 - 19
15 - 17
16 - 18
18 - 24
18 - 21
18
18 - 28
17 - 19
16 - 17
16 - 21
18 - 24
15 - 19
16 - 19
15 - 18
15 - 16
13 - 16
15 - 17
18 - 20
16 - 24
16 - 18
16 - 19
16 - 18
MNK 502
MNK 503
MNK 504
MNK 505
MNK 506
MNK 507
MNK 508
MNK 509
MNK 510
MNK 511
MNK 512
MNK 513
MNK 514
MNK 515
MNK 516
MNK 517
MNK 518
MNK 519
MNK 520
MNK 201
MNK 202
MNK 203
MNK 204
MNK 205
MNK 206
MNK 207
MNK 208
MNK 209
MNK 210
MNK 211
MNK 212
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL-
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
0.9
2.0
1.6
1.3
1.0
1.8
2.5
1.2
2.5
1.9
0.4
1.3
4.0
1.8
1.4
2.8
1.0
1.0
2.4
3.1
3.0
1.0
1.7
1.5
0.2
0.3
0.3
0.3
0.2
0.3
0.4
0.2
0.4
0.3
0.2
0.3
0.6
0.3
0.3
0.5
0.2
0.2
0.4
0.8
0.4
0.3
0.6
0.2
0.2
0.3
0.5
0.5
0.2
0.3
0.3
17.0
17.4
17.7
16.3
16.8
16.7
16.2
15.8
17.3
16.3
18.0
17.1
13.8
13.3
16.5
16.2
17.0
16.0
15.4
14.9
14.
15.
17.
12.
13.
15.
14.8
15.4
16.3
15.9
16.8
,2
.0
.5
.9
.9
.5
3.3
3.5
3.
3.
3.
3,
3.1
3.4
3.4
0.9
1.3
1.4
1.3
3.2
3.2
3.2
3.3
3.3
3.3
3.4
1.1
0.9
1.4
1.3
1.1
1.4
1.5
1.2
0.2
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.2
0.3
1.1 ±
0.9 ±
1.1 ±
*AL = Analytical Laboratory
8
Table 3.1 (continued)
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00100-CS
Address: 333 South Second East Street, Monticello, Utah
Exposure- Soil
Rate Range Sample Meas. Radium-226 Potassium Thorium
Area (//R/h) Ticket No. Method* (pCi/g) (pCi/g) (pCi/g)
V-58
V-59
V-60
V-61
V-62
V-63
V-64
V-65
V-66
V-67
V-68
V-69
V-70
V-71
V-72
V-73
V-74
V-75
V-76
V-77
V-78
V-79
V-80
V-81
V-82
V-83
V-84
V-85
V-86
V-87
V-88
15
13
18
16
15
15
14
15
15
17
16
15
15
15
14
15
16
16
15
15
15
15
14
16
16
13
14
14
15
13
17
21
18
29
28
17
16
20
18
18
24
24
17
17
16
16
16
22
24
18
16
17
16
16
24
35
16
17
18
19
16
41
MNK 213
MNK 214
MNK 215
MNK 216
MNK 217
MNK 218
MNK 219
MNK 220
MNK 221
MNK 222
MNK 223
MNK 224
MNK 225
MNK 126
MNK 127
MNK 128
MNK 129
MNK 130
MNK
MNK
MNK
131
132
133
MNK 134
MNK 135
MNK 136
MNK 137
MNK 138
MNK 139
MNK 140
MNK 141
MNK 142
MNK 143
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
2.5
2.0
.2
,8
1.8
1.5
0.4
0.3
0.9
0.7
0.3
0.3
0.3
3.3
4.5
5.6
2.2
2.3
1.5
1.6
2.7
1.5
5.1
14.7
1.3
1.3
1.4
1.7
1.4
13.4
0.8
2.2
0.3
0.3
0.3
0.3
0.3
2.0
17.0
17.7
15.4
16.3
16.1
17
20
19
17
14
12.9
15.0
18.4
17.1
15.4
14.5
10,
16,
15,
12,
14,
17,
14,
3.4
3.4
3.3
3.3
3.3
4.0
4.4
4.3
17.8
16.0
13.3
12.0
17.3
17.4
18.3
15.3
3.9
3.9
3.6
4.2
4.3
4.4
4.0
3.4
3.3
4.2
4.2
4.1
0.8
0.9
1.0
1.2
0.8
0.8
1.3
1.2
0.9
1.8
1.0
1.1
1.4
1.1
1.3
0.9
0.2
0.2
0.5
0.2
1.1
,2
.9
.9
,9
,3
0.2
0.3
0.3
0.3
0.2
0.3
0.3
0.3
0.3
0.4
0.
0.
0,
0.
0,
0.
0.2
0.3
0.3
0.2
0.3
0.4
0.3
0.2
< 0.3
*AL = Analytical Laboratory
9
Table 3.1 (continued)
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-001OO-CS
Address: 333 South Second East Street, Monticello, Utah
Exposure- Soil
Rate Range Sample Meas. Radium-226 Potassium Thorium
Area (//R/h) Ticket No. Method* (pCi/g) (pCi/g) (pCi/g)
V-89
V-90
V-91
V-92
V-93
V-94
V-95
V-96
V-97
V-98
V-99
V-100
V-101
V-102
V-l 03
V-104
V-105
V-106
V-107
V-108
V-109
V-110
V-lll
V-112
V-113
V-114
V-115
V-116
V-117
V-118
V-119
15
13
14
13
14
15
16
15
14
14
13
13
14
15
14
13
14
15
13
14
15
14
13
13
13
13
15
15
14
14
13
18
20
18
16
17
18
18
17
21
18
16
16
17
21
18
16
17
16
15
17
37
17
16
16
17
16
19
20
18
19
16
MNK
MNK
MNK
MNK
MNK
MNK
144
145
146
147
148
149
MNK 326
MNK 327
MNK 328
MNK 329
MNK 330
MNK 331
MNK 332
MNK 333
MNK 334
MNK 335
MNK 336
MNK 337
MNK 338
MNK 339
MNK 340
MNK 341
MNK 342
MNK 343
MNK 344
MNK 345
MNK 346
MNK 347
MNK 348
MNK 349
MNK 350
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
3.
6,
1,
1.
1.
3,
3.
12.
5.
2.
1.
1.
3.
3.
2.6
1.8
4.9
2.3
2.0
3.1
1.5
3.8
1.7
14
2
7
1
0.6
1.0
0.3
0.3
0.3
0.5
0.6
1.9
0.9
0.4
17.7
,4
,4
,5
.6
,4
,3
0.3
0.5
0.6
0.3
2.1
0.5
1.1
0.3
17.7
17.0
15.8
16.9
20
13.7
15.1
17.4
15.4
15.1
17.1
14.6
15.2
14.8
16.
14.
17.
14.
3 ±
.3
.3
.3
,7
15.8
14.
14.
16.
15.4
17.8
17.4
13.8
16.
15.
14.
13.
4,
4,
3.
3.
4.
4,
3.
0.2
1.3
4.1
4.2
4.2
3.8
4.1
3.8
3.2
3.
3.
3.
3,
3.1
3.2
1.0
1.2
1.1
1.1
1.4
1.4
1.1
1.1
3.1
3.2
3.7
1.2
0.7
0.9
0.9
0.7
0.4
0.3
0.3
0.2
0.4
0.3
0.4
0.3
0.3
0.4
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.2
0.2
0.3
0.
0.
0.
0.
0.
*AL = Analytical Laboratory
10
Table 3.1 (continued)
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-001OO-CS
Address: 333 South Second East Street, Monticello, Utah
Exposure- Soil
Rate Range Sample Meas. Radium-226 Potassium Thorium
Area (//R/h) Ticket No. Method* (pCi/g) (pCi/g) (pCi/g)
V-120
V-121
V-122
V-123
V-124
V-125
V-126
V-127
V-128
V-129
V-130
V-131
V-132
V-133
V-134
V-135
V-136
V-137
V-138
V-139
V-140
V-141
V-142
V-143
V-144
V-145
V-146
V-147
V-148
13
13
13
13
13
13
13
14
15
15
16
15
16
17
13
13
13
15
15
14
13
13
13
13
13
16
14
13
19
16
21
16
16
16
17
18
20
21
24
28
21
26
26
17
19
18
24
19
20
16
15
15
19
17
20
18
28
24
MNK 351
MNK 352
MNK 353
MNK 354
MNK 355
MNK 356
MNK 357
MNK 358
MNK 359
MNK 360
MNK 361
MNK 362
MNK 363
MNK 364
MNK 365
MNK 366
MNK 367
MNK 368
MNK 369
MNK 370
MNK 371
MNK 372
MNK 373
MNK 374
MNK 375
MNK 580
MNK 581
MNK 585
MNK 521
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
1.2
1.7
1.5
1.1
0.7
0.6
2.0
2.0
2.9
3.7
5.5
4.2
1.9
1.7
1.9
3.0
2.2
5.3
6.2
2.9
1.8
1.1
1.8
1.6
2.5
3.0
1.5
1.7
4.3
0.3
0.3
0.3
0.2
0.2
0.2
0.3
0.3
0.5
0.6
0.9
0.6
0.3
0.3
0.4
0.5
0.4
0.8
1.0
0.5
0.3
0.3
0.3
0.3
0.4
15.2
15.6
14.0
15.0
13.8
13.0
13.3
13.1
12.9
.1
.4
.6
11.
14.
18.
16.4
17.5
19.3
18.3
17.7
17.5
16.9
15.8
14.4
18.5
15.6
16.4
10.2
19.1
19.6
16.8
19.3
4.0
4.1
3.1
3.2
2.9
2.9
2.9
2.8
3.0
2.9
3.9
3.5
0.
0.
1.1
3.9
4.0
3.9
3.7
4.3
3.8
3.9
3.4
4.3
4.2
4.0
3.7
0.9
0.8
1.3
0.7
0.2
0.7
1.1
0.8
1.4
0.7
0.9
1.0
1.0
0.2
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
.2
.3
.3
.3
.2
.2
,3
,3
.2
.3
2
,4
,2
.3
,3
,3
1.1
0.2
0.6
± 0.3
± 0.3
± 0.3
± 0.3
± 0.3
± 0.2
See Appendix Figures 2.1a and 2.1b for the verification areas.
*AL = Analytical Laboratory
11
Table 3.2
Radon Decay-Product Concentration Measurement Results
DOE ID No.: MS-001 OO-CS
Address: 333 South Second East Street, Monticello, Utah
Instrument Type: Terradex Track Etch® Detector
Detector
Number Start Date End Date
Tracks Per
mm2
Radon
Concentration
(pCi/L)
Working
Level
526495
526235
526251
01-18-89
01-18-89
01-18-89
01-18-90
01-18-90
01-18-90
25.7
33.3
25.2
3.37
4.35
3.32
0.0169
0.0218
0.0166
Annual Average: 0.0184
See Appendix Figure 2.1a for the measurement location.
12
I I i i I
2«
i i i i i i 1 i T —r
SOUTH THIRO EAST STP£-;
3
/- 123 125 12*
13-21 5-2S 17-26 J- I 7
EH 0 v-10
13-21 v-25
EH V-95 *-sa 109 Y-60 V-4fi V-J9 '-32 -IB tf- 1 16
S-24 : a-18 S-22 I7-Z4 tB-29 18-20 ia-2« ia-2* ia-2i 15-20 9-24
on EH EH EI EH EH 36 /< 3-T B 601 H2J
0 v- l 2*
3-ia
rf~96 -39 V-32 V —C T V-S4 V- 10J V-AO -19 I 10
rs-'9 ©\ 3-17 6-32 15-18 1S-2* 6-28 14-Ifl S-24 18-Z* 15-19 18-21 a-zt I 7-19 14-17
4-ia
\ P2 LTH 0© . 36 ^ 3o
rav tf-27
I7-1»
/-97 U-20
0 V-59
14-2 43 V 13-16 15-18 13-17 3-17 3-16 s-ta 16-19 ia-2t
19-21
00 EH EH '2 121 43 . / f 36
/ © 0 1 19 V-I 12
M-16 13-16 V-53 V-29 /-42
V-9 105 N 14-17 15-16 S-17 18-28 8-28 '9-18 ia-24 14-18 14-18
V-49
• 0 0 0 EH \ EH 16-19 13-18 13 /
12 /•
v-106 v-29 '2 \ V-49 V-92 V-B5 V-64 /-5 V-SO V-4J v-3« 13-17 V-78 13-16 18-26 13-16 13-16 14-18 13-15 14-20 6-l» 13-16 17-19 17-19 18-23 13-17
• EH EH EH •.EH 13-15
©© ra
1 M
-100 V-86 V-30 V- 107 Y-79 V-65 v-58 V-31 rf-37
U-16 13-21 13-16 14-17 15-19 13-16 16-23 13-15 14*16 15-18 15-21 U-16 16-17 13-IT 17-21
E3 EH 12 ' V 36 48
k_3
MATCh LINE FIGURE 2.1a
F.G'JRE 2 lb
FIGURE 2.13
fa
NOT TO SCALE
« V*t\9)J\00OlV»i043'Bffv 01<:»(14'
J I 1 ! L
SCALE IN FEET
I I I I I ' I I
20 10 0
' ' I
©
<D
i—i
i i
12-15
I I I I I '
ALL DEPTHS IN INCHES
ALL EXPOSURE RA-JS IN uR/h
ASSESSED AREA IDENTIFIER
AVERAGE OEPTH OF ASSE3SE0 CONTAMINATION
AREA OF ASSESSED CONTAMINATION
PCST-REUEOIAL ACT;ON EXPOSURE-RATE RANGE
BCUNCARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEOIAL ACTION
J L
HOC*** (S f0* 'MC SOU USC OF TMC U.S OCP**ruC<«T OF
S.*iiQf ANO iTS C3NTJUCT0I1S iT is HOT A 1>ND Su*vC »W.
UTtlirv i.X4dOM P(J»r. 0* OTNE* lyPAOVCuCMT SUAVC »WT
**o if SOT ro ac *cuco UPON POM TMC csr*8L<SHuesr of
FCICC. tuiLOiNc. o* OTHEA FUTUBC >U^AOVCUCNT UNCS
' ) I t I I L
RADIOLOGICAL AS-BUILT
FIGURE 2.1b
EXTE=?iOR EXTENT OF CONTAMINATION
IT CK A C. AP» NO Q*rC •T CK ».C. *»°
U.S. DEPARTMENT OF ENERGY CRANO JUNCTION PROJECTS OFFICE, COLOAAOO
1* 333 SOUTH SECCNO EAST STREET
MONTICEL'-O. UTAH
MKT GIOTECH INC
0*11 • xJ
COC 0 -0 ws_ooioo-cs
OwC HO 3-0444-V2
' 52 I I I I
26
~r~
23
-r i i i r —i
36
~r
38
—i
40
~~i I I I
46
~~i
43
I I I I I I I I I I I I I I
M4'CH LINE F:GURE 2 lb
32
0© x:C© 50] EH V-S7 -53 V-43
13-16 s -1 a JX61I20 s-ta 3-19 / - 108 5-1 7 5-21
1 22 5-13
0 EH EH EH EH EH 13-19
i-MJ 139 /-US /ISO /-I 3*
3-17 «-2Q 13-19 3-1 7
s-:o 36i f
EH
'-13 155
J-l« S-2«
EH i4-ia t
V-I 36
13-15 I3-'B
T . — L SGXl 12 0 ~ ©©^ /- 10 V- 16
©0 TT3 n -_L_ U-1S
12
V- 1 7 V-3 v-i i
V-6 12-61 r 1-15 13-13
v-3 4-18
V-7 12-17 V-i © 12-14
13-14 EH M-15
14-16
'ra 1 / 1 1 V-T2 108 1 I
12-14 12-15
[96] .
[96) 18-24
v-2
15-17 n-2 16-17
18-24-^-
ONE STORY 9L0CK BUILDING
12-29
14-16
[<2
5-19
EH v-i 7 1-0©
lEH
I X2' 12-51
v-l 7 15-16
0© Li±J\ 0© /t3 3 OTP L .
7T7
SOUTH SECONO EAST STREET
LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN (iR/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
90UN0ARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA ICSNT|F|FR
AND EXCAVATION EXPOSURE-RATE RANGE
POST-REMEDIAL ACTION RAOON DECAY-PRODUCT
CONCENTRATION MEASUREMENT LOCATION
ASSESSED CONTAMINATION NOT FOUNO AT TIME
OF REMEDIAL ACTION
HEIGHT IN INCHES OF ASSESSED
CONTAMINATED CONCRETE MASONRY WALL
ASSESSED AREA A (CONCRETE MASONRY WALL)
WAS EXCLUDED FROM REMEDIAL ACTION
FIGURE 2.1b
r
FIGURE 2.1a
NOT TO SCALE
11*1111 I I I I I I ! I 1 I I l f 1 1 i
THIS 3*>«'NC. Mt»**£0 ton TM£ CMVIAOIUCNTAL *CSTO*AT:C*
Pf)OC*>w. "S *0* TM« SOU USC 0' TMC U S DCPARTMCNT 3r
CN£«C *NO ITS CONTHACTOHS H* i5 NOT A u>NO Su«v£r *u»T.
UTILtrt LOCATION »t>T. 0* OTMCR IMHOVCWCNT SU*V(T »L»T
AMD IS NOT TQ |C ftCLlCD UPON PON 'MC CSTABLISHME^' OP
PCNCC. •UH.O'NC. 0* OTHf* PUTUAC IUV^OVCUCNT LhES
I I I I J I I !_
RADIOLOGICAL AS-BUILT
FIGURE ?.1n
INT^lQP AND EXTERiQP EXTENT OF CONTAMINATION
NO. t 0*t£ ) RC'^.OnS
'-»l set->«*»-«»1 /««
>T C* [ A £ kpp HO 0*TC >f j C« * C. A^B
U.S. DEPARTMENT OF ENERGY
GRANO JUNCrtON pitojccrs orncc. coioiuoo
12 333 SOUTH SECOND EAST STREET
MONTICELLO. UTAH
GEOTICH INC
Mi-CJI OO-CS
> 7; 72
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
333 SOUTH 2ND EAST STREET
MONTICELLO, UTAH (MS00100-CS)
A. R. Jones
July 1996
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
LOCKHEED MARTIN ENERGY RESEARCH CORPORATION
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-96OR22464
CONTENTS
LIST OF TABLES iv
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES .. 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
Radon Measurement Results 4
CONCLUSION 4
REFERENCES 7
iii
LIST OF TABLES
1. Applicable guidelines for protection against radiation 5
2. Results of ORNL analysis of Geotech soil samples from 333 South 2nd East Street,
Monticello, Utah (MS001 OO-CS) 6
iv
ACKNOWLEDGMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge M. K. Jensen for analysis of soil samples and M. J. Wilson-Nichols
and N. F. Kirby for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was accepted
into the U.S. Department of Energy's (DOE's) Surplus Facilities Management Program,
with the objectives of restoring the government-owned mill site to safe levels of radio-
activity, disposing of or containing the tailings in an environmentally safe manner, and
performing remedial actions on off-site (vicinity) properties that had been contaminated
by radioactive material resulting from mill operations. During 1988, RUST Geotech, the
remedial action contractor designated by DOE, performed remedial action on the vicinity
property at 333 South 2nd East Street, Monticello, Utah. The Environmental Technology
Section (ETS) of Oak Ridge National Laboratory was assigned the responsibility of
verifying the data supporting the adequacy of remedial action and confirming the site's
compliance with DOE guidelines. The ETS found that the site successfully meets the
DOE remedial action objectives. All deficiencies noted in the initial review have been
resolved with the revised completion report. Procedures used by the ETS are described in
the Environmental Technology Section Procedures Manual (ORNL 1993).
ix
1
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT 333 SOUTH 2ND EAST STREET
MONTICELLO, UTAH (MS00100-CS)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War II. Various govern-
ment agencies operated the mill until 1947. In 1948 the Atomic Energy Commission
(AEC) obtained the mill and operated it under contract through 1959 to provide both
uranium and vanadium. Mill operations were terminated on January 1, 1960. In 1961 the
mill tailings piles were leveled and graded, covered with rock and soil, and seeded with na-
tive grasses. During 1974 and 1975, the ore stockpiles were removed from the site, and
the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south ofthe city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to dis-
posal. During the years of active mill operation, the mill tailings were normally moist, so
erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform reme-
dial actions on off-site (vicinity) properties that had been contaminated by radioactive ma-
terial resulting from mill operations. The Monticello mill site and the tailings remain in the
custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial actions
for vicinity properties were separated from MRAP with establishment of the Monticello
Vicinity Properties (MVP) Project (U.S. DOE 1990b).
•The verification of remedial action was performed by members of the Environmental Assessment Grourjjjyhjf^^
Environmental Technology Section of the Health Sciences Research Division at Oak Ridge National Laboratory under DOE
contract DE-AC05-96OR22464 with Lockheed Martin Energy Research Corporation.
2
During 1988, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a meat processing plant located at 333 South 2nd East Street, Monticello,
Utah. The remedial action plan required excavation of all exterior contamination. When
the excavation was completed, the property was resurveyed, including soil sampling, to
ensure the removal of all contamination, backfilled with uncontaminated material, and
restored to a condition comparable to that which existed prior to remedial action (Geotech
1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with DOE
guidelines. The Environmental Technology Section (ETS) of Oak Ridge National Labor-
atory (ORNL) has been assigned the responsibility of this task at the 333 South 2nd East
Street site. This report describes the methods and results of that verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available doc-
umentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990a).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993) in-
dicates the property was remediated as evaluated by DOE on the basis of Environmental
Protection Agency standards and the DOE guidelines (DOE 1990a). Excess residual
radioactive materials were present, thus it was appropriate to designate this property for
remedial action.
The pre-remedial-action survey performed by Geotech identified 2272 yd3 of mill
tailings 6 to 96 inches deep. During the actual removal process, a total of 9074 yd3 of
contaminated earth and uranium mill tailings, 6 to 120 inches deep, were removed from
a 12,340 nrarea.
A post-excavation survey was performed by Geotech prior to backfilling the exca-
vated areas. This survey consisted of gamma scans with a scintillometer of the ground
level of the structure, a surface scan of the exterior, and soil sampling. Samples repre-
sentative of the bottom 15-cm (6-in.) soil layers of 148 excavated verification areas were
collected and blended to form representative composite soil samples for each verification
area. —.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been sub-
tracted from radionuclide concentrations in soil samples. Applicable DOE guidelines for
protection against radiation are given in Table 1.
Gamma Measurements
Gamma exposure rate measurements taken by Geotech at the ground-level of the
structure ranged from 12 to 29 uR/h. Exterior surface gamma measurements taken from
the excavated areas prior to backfilling ranged from 12 to 68 uR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. These samples were blended to form a
composite soil sample representative of an average over the 148 exterior verification
areas. Geotech's analysis of these samples showed mRa concentrations to range from
0.4 to 14.7 pCi/g in the composite sample. ORNL ETS obtained a percentage of these
samples and performed a confirmatory analysis which showed ~6Ra concentrations of 1.2
to 12 pCi/g. These values are below the EPA standard value of 15 pCi/g for soil layers
>15 cm below the surface. Results of Geotech and ORNL soil sample analyses are given
in Table 2.
As a result of a meeting between the RAC and IVC on May 26, 1994, anomalous
readings, defined as >30% above the average of the excavation, will be investigated to
show compliance to the DOE Hot Spot guideline. This property was remediated before
this procedure change. The IVC observed that 44 verification areas exceeded 30% of the
excavation average. The IVC will allow a correlation developed by the RAC to estimate
226Ra concentrations based on gamma exposure rates. The highest anomalous reading of
68 uR/h on this property using the RAC's correlation yields a 226Ra concentration of 60
pCi/g. This area is described as a point source, therefore, an area of 1 m2 is assumed.
This value is well below the Hot Spot guideline for a 1 m2 subsurface area (150 pCi/g).
The second highest anomalous reading of 61 uR/h, associated with material left in place
around the building footer, yielded a ^Ra concentration of 52 pCi/g. Since the area of
the footer is <8.5 m2, this value also does not exceed the Hot Spot guideline (Table 1).
The remaining anomalous areas are less than 41 uR/h, which yields a 226Ra concentration
of 29 pCi/g (Table 1). This value is also below the Hot Spot guideline of 25 m2 for sub-
surface samples, when assuming the maximum area of 25 m2.
4
Radon Measurement Results
Radon decay-product concentration (RDC) measurements for this site were deter-
mined by the Alpha-track method. To monitor radon levels, Geotech placed three alpha-
track detectors on the ground floor of the residence located on this property for a period
of approximately one year (from January 18, 1989 to January 18, 1990). The average
annual working level (WL) of radon progeny concentration, as determined by the
Tech./Ops-Landauer Corporation, was 0.0184, which is below the 0.03-WL guideline
given in Table 1.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis
by ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based on the results of the post-remedial-action data, which are confirmed by the verifi-
cation assessment data, these radiological measurements fall below the limits prescribed
by DOE guidelines. All deficiencies noted in the initial review have been identified by the
RAC and corrected in the revised completion report as discussed in meetings between
Geotech and ORNL on March 22, 1995 and February 28, 1996. It is concluded that the
site successfully meets the DOE remedial action objectives.
5
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of 226Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Radionuclide con-
centrations in soil
for Hot Spot areas
Exposure to 222Rn
progeny
Maximum Permissible con-
centration of Ra226 in soil
above background level, for
areas less than 25 m2
Average annual radon proge-
ny concentration (including
background)
Ra concentrations, in any
surface or subsurface area
less than 25 m2, is below the
guideline by a factor of
(100/A)*, where A is the
area of the elevated region
0.03 WL
(DOE 1990a)
6
Table 2. Results of ORNL analysis of Geotech soil samples
from 333 South 2nd East Street, Monticello, Utah (MS001 OO-CS)
ORNL
sample
No."
Geotech
sample
No.*
Depth
(cm>
^6Ra concentration (pCi/g)
ORNL Geotech
XI
X13
X24
X37
X45
X52
X68
X76
X89
X96
X107
X124
X139
X148
MNK 601
MNK 613
MNK 624
MNK512
MNK 520
MNK 207
MNK 223
MNK 131
MNK 144
MNK 327
MNK 338
MNK 355
MNK 370
MNK 521
>15
>15
>15
>15
>15
>15
>15
>15
>15
>15
>15
>15
>15
>15
4.2
3.9
6.6
1.2
2.2
1.9
4.9
1.9
3.9
12.0
1.9
1.2
2.9
4.0
.7.0
5.0
6.8
0.4
2.4
1.9
5.6
1.9
3.8
12.4
1.9
0.7
2.9
4.3
" An X-type sample is a split of the sample taken by the remedial action contractor.
4 Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated areas
were taken by Geotech, and these samples were blended to form a composite soil
sample, which represents an average over one of the verification areas.
7
REFERENCES
Geotech 1993. Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS001 OO-CS, Address: 333 South Second East Street,
Monticello, Utah 84535, Geotech, Grand Junction, Colorado, December 1993.
ORNL 1993. Environmental Technology Section (Formerly Pollutant Assessment
Group) Procedures Manual. ORNL 6645/R2, September 1993. Oak Ridge National
Laboratory, Grand Junction, Colorado.
U.S. DOE 1990a. Verification and Certification Protocol for the Office of Environmental
Restoration, Formerly Utilized Sites Remedial Action Programs and Decontamination
and Decommissioning Program, Revision 3, November 1990. U.S. Department of
Energy, Washington, D.C.
U.S. DOE 1990b. Monticello Mill Tailings Site Declaration for the Record of Decision
and Record of Decision Summary. U.S. Department of Energy, Grand Junction Projects
Office, Grand Junction, Colorado.
DEC 18
PROPERTY COMPLETION REPORT
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
DOE ID NO.: MS-00102-MR
ADDRESS: 417 SOUTH SECOND EAST STREET
MONTICELLO, UTAH 84535
SEPTEMBER 1993
Prepared for
Environmental Restoration Program
Department of Energy
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
FOR
FOR
by
RUST Geotech Inc. has been granted authorization to conduct remedial action under
the Environmental Restoration Program. Remedial action was done in accordance
with the U.S. Environmental Protection Agency "Standards for Cleanup of Land and
Buildings Contaminated with Residual Radioactive Materials from Inactive Uranium
Processing Sites," 40 CFR 192.12, 192.20-23.
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.1.3 Radon Decay-Product Concentration (RDC) Measurement .... 5
3.2 Recommendation for Certification 6
4.0 APPENDIX 7
i
DOE ID NO.: MS-00102-MR
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Environmental Restoration Program with the primary objective of
reducing the potential hazard to the public due to long-term exposure to
low-level radioactivity associated with the offsite mill tailings derived from
the former U.S. Atomic Energy Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to provide
additional sources of vanadium needed during World War II. Various
government agencies operated the mill until 1947. The AEC obtained the
mill in 1948 and operated it through 1959 under cost-type contracts to
provide both uranium and vanadium. Mill operations were terminated on
January 1, 1960.
The mill processed approximately one million tons of ore during the AEC
operations. Throughout the operating period, mill tailings from the
Monticello millsite were removed from the site and used for construction-
related activities in the vicinity.
1.2 Criteria for Remedial Action
The Environmental Restoration Program adopted the "Standards for
Remedial Actions at Inactive Uranium Processing Sites" (40 CFR Part 192)
for all cleanup activities under the MVP Project. These standards were
prepared by the U.S. Environmental Protection Agency (EPA) to establish
guidelines for the control of tailings piles and the cleanup of buildings and
open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE), which determined that the property
contained mill tailings (residual radioactive material) exceeding the EPA
standards. The Remedial Action Contractor was notified of the inclusion
of this property into the Environmental Restoration Program and was
authorized by the DOE to conduct remedial action as required to bring the
property into conformance with the EPA standards.
1
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owners:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
DOE ID NO.: MS-00102-MR
MS-00102-MR
Parcel Numbers M-4 and M-4-3, Block 1,
City of Monticello, County of San Juan,
State of Utah
417 South Second East Street
Monticello, Utah 84535

Major Residential (MR)
Not applicable; historical inclusion by the
DOE
June 8, 1984
RUST Geotech Inc.
May 28, 1985
Crowley Construction
East Route
Monticello, Utah
September 8, 1987
September 30, 1987
Interior: 25 cubic yards
Exterior: 702 cubic yards
1,904 square meters (m2)
September 1993
2
DOE ID NO.: MS-00102-MR
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of interior and exterior residual
radioactive material (Appendix Figure 2.1). Once excavation was
complete, the affected areas were resurveyed for possible remaining
residual radioactive material and, upon attaining satisfactory results, were
backfilled with uncontaminated material. The property was restored to a
physical condition comparable to that which existed prior to remedial
action activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified 675 cubic yards of contamination,
ranging from 6 inches to 18 inches deep, within the property. The
remedial action process included the removal of approximately 727 cubic
yards of residual radioactive material, ranging from 6 inches to 60 inches
deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00102-MR
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by Bendix Field Engineering
Corporation during October 1984, as described in the final REA
dated May 1985. Appendix Figure 2.1 shows the extent of
assessed contamination and identifies the areas recommended to
undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to backfilling.
Following the gamma scan, soil samples representative of the
6-inch-thick soil layer at the bottom of the exterior excavation
were collected. These samples were blended to form composite
samples representing the exterior verification areas (Appendix
Figure 2.1).
Interior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 16 microroentgens per hour (//R/h)
to 19 //R/h for the remediated crawl space, and 15 //R/h to 18 //R/h
for the ground floor (Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 16 //R/h to 47 //R/h (Appendix
Figure 2.1). Elevated exposure rates in Areas V-20 , V-21, V-22,
and V-24 were associated with residual radioactive material left in
place to avoid causing permanent damage to mature trees.
Elevated exposure rates in Area V-26 were associated with
residual radioactive material left in place because of safety
considerations related to the depth and stability of the excavation.
Elevated exposure rates in Area V-23 were associated with
material at the bottom of the excavation that did not exceed the
EPA standards. Elevated exposure rates in other areas were
caused by material left in place in adjacent verification areas. The
results of analyses for radium-226 in five composite soil samples
of these areas ranged from 18.3 picocuries per gram (pCi/g) to
43.1 pCi/g. The 100 m2 area averages ranged from 4.9 pCi/g to
14.9 pCi/g (Appendix Table 3.1). Areas V-20, V-21, V-22, V-24,
and V-26 also met the hot spot criteria, as indicated in Appendix
Table 3.2. The results of analyses for radium-226 in 20 remaining
composite soil samples ranged from 1.7 pCi/g to 15.9 pCi/g
(Appendix Table 3.3).
4
DOE ID NO.: MS-00102-MR
3.1.3 Radon Decay-Product Concentration (RDC) Measurement
Based on measurements representing an annual average, the
RDC was 0.0047 working level (WL) for the house (Appendix
Table 3.4). Appendix Figure 2.1 shows the measurement location
on the ground floor (the lowest habitable level of the structure).
RDC measurements were not taken in the trailer house due to
excessive ventilation caused by no permanent foundation.
5
DOE ID NO.: MS-00102-MR
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by the EPA standards (40 CFR 192.12, 192.20-23),
as indicated in the Certification Data Summary below.
Therefore, the property located at 417 South Second East Street, in
Monticello, Utah, is recommended for certification as required by the
Environmental Restoration Program guidelines, and the appropriate
records should be documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Standards
Shall not exceed 20 //R/h
above background.*
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Results
Ranges were 16 //R/h to
19 //R/h for the
remediated crawl space,
and 15 //R/h to 18 //R/h
for the ground floor.
Annual average was
0.0047 WL.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background1 in the
15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above backgroundt in
anyl 5-cm-thick soil layer
more than 15 cm below
the surface, averaged
over 100 m2.
< 5 pCi/g above
background.
Soil sample results
ranged from 1.7 pCi/g
to 15.9 pCi/g. Other
soil sample results,
averaged over 100 m2
areas, ranged from
4.9 pCi/g to 14.9 pCi/g.
*The background exposure rate is approximately 16 //R/h.
TThe background radium-226 concentration is approximately 2.0 pCi/g.
6
DOE ID NO.: MS-00102-MR
4.0 APPENDIX
Appendix Tables:
Table 3.1 Calculations of Average Radium Concentrations
Over 100 m2 Areas
Table 3.2 Hot Spot Calculation Results
Table 3.3 Post-Excavation Sample/Measurement Results
Table 3.4 Radon Decay-Product Concentration
Measurement Results
Appendix Figure:
Figure 2.1 Interior and Exterior Extent of Contamination -
RADIOLOGICAL AS-BUILT
MM-JEK:06-18-93
MS-00102.MR WP51
REV053193
7
Table 3.1
Calculations of Average Radium Concentrations Over 100 m2 Areas
DOE ID No.: MS-00102-MR
Address: 417 South Second East Street, Monticello, Utah
(CpXAp) + [Crx (1,076-Ap)]
Cav9 = 1,076
Radium-226 concentration in pCi/g averaged over a 100 m2
(1,076 ft2) area.
Radium-226 concentration in pCi/g of the residual radioactive
material left in place.
Area in ft2 of the residual radioactive material left in place.
Radium-226 concentration in pCi/g for the remainder of the
100 m2 area, including excavated and unexcavated areas.
Total area in ft2 over which the EPA guideline is applied.
Where:
C avg
S -
* :
1,076 =
8
Table 3.2
Hot Spot Calculation Results
DOE ID No.: MS-00102-MR
Address: 417 South Second East Street, Monticello, Utah
Where:
Shg = [Sgx (100/A)%] + Bkg
Shg = Hot Spot Limit of radium-226 concentration in pCi/g.
Sg = Authorized Limit of radium-226 concentration in pCi/g
(Sg = 5.0 pCi/g for surface soil and 15.0 pCi/g for subsurface soils).
100 = Total areain m2 over which the Hot Spot Limit guideline is applied.
A = Area in m2 of the hot spot.
Bkg = Background radium-226 concentration in pCi/g (Bkg = 2.0 pCi/g for
Monticello).
A Sa Sha Radium-226 in
Meas. Depth a a Hot Spot Area
Area Method* (inches) (m2) (pCi/g) (pCi/g) (pCi/g)
V-20 AL 06 - 12 6.7 15.0 60.0 24.9
V-21 AL 06 - 12 9.3 15.0 51.2 43.1
V-22 AL 06 - 12 12.3 15.0 44.8 36.3
V-24 AL 12 - 18 3.4 15.0 83.3 19.3
V-26 AL 60 - 66 11.3 15.0 46.6 18.3
Therefore, the radium-226 concentrations in the hot spot areas do not exceed the
Hot Spot Limits.
*AL = Analytical Laboratory
10
Table 3.3
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00102-MR
Address: 417 South Second East Street, Monticello, Utah
The analytical uncertainties in the table are reported at the 95-percent confidence
interval. A less-than sign (<) indicates that the minimum detection limit based on
Compton background was reached.
Area
Exposure- Soil
Rate Range Sample
(//R/h) Ticket No.
Meas.
Method*
Radium-226
(pCi/g)
Potassium
(pCi/g)
Thorium
(pCi/g)
EXTERIOR
V-l
V-2
V-3
V-4
V-5
V-6
V-7
V-8
V-9
V-10
V-ll
V-12
V-13
V-14
V-15
V-16
V-17
V-18
V-19
16 - 23
16 - 21
16 - 23
16 - 31
17
17
16
17
17
18
19
19
18
19
18
18
17
17
19
27
23
36
29
25
27
47
29
21
29
25
29
21
21
29
MNH 538
MNH 539
MNH 540
MNH 541
MNH 542
MNH 543
MNH 544
MNH 545
MNH 549
MNH 550
MNI 151
MNI 152
MNI 153
MNI 154
MNI 155
MNI 156
MNI 157
MNI 158
MNI 159
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
2.5
1.7
3.4
4.8
4.2
5.4
8.8
7.2
2.4
7.0
15.6
7.0
3.3
7.3
2.4
13.1
2.2
3.5
12.6
0.3
0.3
0.4
0.8
0.4
1.1
2.5
1.1
0.6
1.2
0.4
2.1
0.4
0.6
2.0
20.4 ± 3.3
19.4 ± 3.1
20.8 ± 3.3
19.7 ± 3.2
20.3 ± 3.2
19.4 ± 3.1
20.4 ± 3.3
20.8 ± 3.3
18.7 ± 3.8
17.3 ± 3.7
15.8 ± 3.5
16.3 ± 3.5
17.3 ± 3.7
15.5 ± 3.4
17.8 ± 3.6
± 18.0
15.6
16.2
17.1
± 3
± 3
± 3
0.9
0.9
1.0
0.7
0.9
1.6
0.7
0.9
1.1
0.9
1.2
1.1
1.4
1.1
1.0
0.9
1.1
1.1
0.6
0.2
0.2
0.2
0.2
0.2
0.3
0.2
0.2
0.3
0.3
0.3
0.3
0.3
See Appendix Figure 2.1 for the verification areas.
*AL = Analytical Laboratory
11
Table 3.3 (continued)
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00102-MR
Address: 417 South Second East Street, Monticello, Utah
Exposure- Soil
Rate Range Sample Meas. Radium-226 Potassium Thorium
Area (//R/h) Ticket No. Method* (pCi/g) (pCi/g) (pCi/g)
EXTERIOR
V-20f 25 - 44 MNI 160 AL 24.9 ± 3.9 19.3 ± 4.1 0.7 ± 0.3
V-21* 23 - 47 MNI 161 AL 43.1 ± 6.8 15.6 ± 4.1 < 0.6
V-22f 23 - 36 MNI 162 AL 36.3 ± 5.7 18.3 ± 4.1 1.7 ± 0.5
V-23 25 - 34 MNH 546 AL 15.9 ±1.8 17.9 ± 3.3 1.3 ± 0.3
V-24* 25-31 MNH 547 AL 19.3 ± 2.2 21.7 ±3.6 1.4 ± 0.4
V-26t 25 - 40 MNH 548 AL 18.3 ± 2.1 18.9 ± 3.4 0.7 ± 0.3
INTERIOR
V-25 16 - 19 Not applicable
See Appendix Figure 2.1 for the verification areas.
*AL = Analytical Laboratory
Composite soil samples of residual radioactive material left in place.
12
Table 3.4
Radon Decay-Product Concentration Measurement Results
DOE ID No.: MS-00102-MR
Address: 417 South Second East Street, Monticello, Utah
Instrument Type: Terradex Track Etch® Detector
Radon
Detector Tracks Per Concentration Working
Number Start Date End Date mm2 (pCi/L) Level
638994 12-21-87 01-18-89
639012 12-21-87 01-18-89
637148 12-21-87 01-18-89
8.5 0.88 0.0044
7.8 0.81 0.0041
10.7 1.11 0.0056
Annual Average: 0.0047
See Appendix Figure 2.1 for the measurement location.
13
Table 3.1 (continued)
Calculations of Average Radium Concentrations Over 100 m2 Areas
DOE ID No.: MS-00102-MR
Address: 417 South Second East Street, Monticello, Utah
CD AD cr cava EPA
Meas. Depth v H Standard
Area Method* (inches) (pCi/g) (ft2) (pCi/g) (pCi/g) (pCi/g)
V-20 AL
V-21 AL
V-22 AL
V-24 AL
V-26 AL
06 - 12 24.9
06 - 12 43.1
06 - 12 36.3
12 - 18 19.3
60 - 66 18.3
72 5.91
100 12.02
132 4.93
37 4.44
122 7.6s
7.2 17.0
14.9 17.0
8.8 17.0
4.9 17.0
8.8 17.0
Therefore, the averaged radium-226 concentrations do not exceed the EPA standard.
*AL = Analytical Laboratory
Weighted-area average, based on 313 ft2 of Area V-9 at 2.4 pCi/g, 522 ft2 of
Area V-10 at 7.0 pCi/g, 80 ft2 of Area V-11 at 15.6 pCi/g, and 89 ft2 of Area V-18
at 3.5 pCi/g.
2Weighted-area average, based on 74 ft2 of Area V-10 at 7.0 pCi/g, 570 ft2 of
Area V-11 at 15.6 pCi/g, 326 ft2 of Area V-12 at 7.0 pCi/g, and 6 ft2 of Area V-18
at 3.5 pCi/g.
3Weighted-area average, based on 478 ft2 of Area V-14 at 7.3 pCi/g, 411 ft2 of
Area V-15 at 2.4 pCi/g, and 55 ft2 of Area V-17 at 2.2 pCi/g.
4Weighted-area average, based on 247 ft2 of Area V-3 at 3.4 pCi/g, 303 ft2 of
Area V-4 at 4.8 pCi/g, 307 ft2 of Area V-5 at 4.2 pCi/g, and 182 ft2 of Area V-6 at
5.4 pCi/g.
5Weighted-area average, based on 214 ft2 of Area V-6 at 5.4 pCi/g, 245 ft2 of
Area V-7 at 8.8 pCi/g, 278 ft2 of Area V-8 at 7.2 pCi/g, 7 ft2 of Area V-9 at
2.4 pCi/g, 77 ft2 of Area V-18 at 3.5 pCi/g, and 133 ft2 of Area V-19 at 12.6 pCi/g.
9
42
40
36
36
34
32
30
28
26
24
22
20
18
16
14
12
10
EAST FOURTH SOUTH STREET
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NORTH
THIS DRAWING. PREPARED FOR THE ENVIRONMENTAL RESTORATION
PROGRAM. IS FOR THE SOLE USE OF THE U.S. DEPARTMENT OF
ENERGY AND ITS CONTRACTORS. IT IS NOT A LAND SURVEY PLAT,
UTILITY LOCATION PLAT, OR OTHER IMPROVEMENT SURVEY PLAT
AND IS NOT TO BE RELIED UPON FOR THE ESTABLISHMENT OF
FENCE. BUILDING. OR OTHER FUTURE IMPROVEMENT LINES.
20 22
_J L
24
12
CRAWL
SPACE (AXD
0 m V-25
16-19
DETAIL A
NOT TO SCALE
©
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m
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LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN /iR/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
12-15 POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION
12
v-i
16-17
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION AREA IDENTIFIER AND
EXCAVATION EXPOSURE —RATE RANGE
/CTN POST-REMEDIAL ACTION RADON DECAY-PRODUCT
(5£S' CONCENTRATION MEASUREMENT LOCATION
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
AREA WITH CONTAMINATION LEFT IN PLACE
RADIOLOGICAL AS-BUILT
FIGURE 2.1
INTERIOR AND EXTERIOR EXTENT OF CONTAMINATION
M-tCIMM>ltM>m./l>.
U.S. DEPARTMENT OF ENERGY
CHAMO JUNCTION PROJECTS orrm. cotowoo
'7-r
raw. uk*.
417 SOUTH SECOND EAST ST.
MONTICELLO. UTAH
•«•- MS-00102-MR
G BOTCH INC —
26 28 30 32 34 36 38 40 42 44 46
3-C439-V1
48 5C
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
417 SOUTH 2ND EAST STREET
MONTICELLO, UTAH (MS00102-MR)
A.R.Jones
November 1993
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements . 3
Soil Sample Analysis 3
Radon Measurement Results 3
CONCLUSION 4
REFERENCES 7
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 5
2 Results of ORNL analysis of Geotech soil samples from 417 South 2nd East Street,
Monticello, Utah (MS00102-MR) 6
v
ACXNOWLELXTMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge G. A. Pierce for analysis of soil samples and G. K. Stowe and M. K.
Jensen for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1987, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at 417
South 2nd East Street, Monticello, Utah. The Environmental Technology Section
(ETS) of Oak Ridge National Laboratory was assigned the responsibility of
verifying the data supporting the adequacy of remedial action and confirming the
site's compliance with DOE guidelines. The ETS found that the site successfully
meets the DOE remedial action objectives. All deficiencies noted in an earlier
review have been corrected in the revised completion report. Procedures used by
the ETS are described in the Environmental Technology Section Procedures
Manual (ORNL, 1993).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT 417 SOUTH 2ND EAST STREET
MONTICELLO, UTAH (MS00102-MR)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War U. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Environmental
Assessment Group in the Environmental Technology Section of the Health Sciences Research
Division at Oak Ridge National Laboratory under DOE contract DE-AO35-84OR21400 with Martin
Marietta Energy Systems, Inc.
During 1987, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a private residence located at 417 South 2nd East Street, Monticello, Utah.
The remedial action plan required excavation of all exterior contamination. When the
excavation was completed, the property was resurveyed, including soil sampling, to ensure
the removal of all contamination, backfilled with uncontaminated material, and restored to
a condition comparable to that which existed prior to remedial action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Environmental Technology Section (ETS) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the 417 South 2nd
East Street site. This report describes the methods and results of that verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 675 yd3 of mill
tailings 6 to 18 inches deep. However, during the actual removal process, a total of 727
yd3 of contaminated earth and uranium mill tailings, 6 to 60 inches deep were removed
from a 1904 m2 area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of gamma scans with a scintillometer, ground-level
and basement scans of the building and a surface scan of the exterior and soil sampling.
Samples representative of the bottom 15-cm (6-in.) soil layers of 26 excavated areas were
collected and blended to form representative composite soil samples for each verification
area. An additional soil sample was collected from beneath the house. This result is not
included in the completion report as supportive data for interior verification.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Gamma exposure rate measurements taken by Geotech at the ground-level of the
residence ranged from 15 to 19 /iR/h. Exterior surface gamma measurements taken from
the excavated areas prior to backfilling ranged from 16 to 47 //R/h. Elevated gamma
exposure rates in excavated areas are due to contamination left in place around trees and
due to engineering concerns.
Soil Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. There were 26 excavated areas for this
property, one of these areas being under the house (V25). In twenty of the remaining
excavated areas, Geotech's analysis of these samples showed ^Ra concentrations from 1.7
to 15.9 pCi/g in the composite samples (VI through V19, and V23). ORNL ETS obtained
a percentage of these soil samples and performed a confirmatory analysis, which showed
^Ra concentrations from 1.5 to 15.8 pCi/g. These values are below the DOE guideline
value of 15 pCi/g above the background value of 2 pCi/g for soil layers > 15 cm below the
surface (Table 1). The remaining 5 exterior verification areas (V20, V21, V22, V24, and
V26) contain contamination left in place due to engineering concerns and to prevent
damage to trees. Geotech's analysis of these samples showed 226 Ra concentrations from
18.3 to 43.1 pCi/g in the composite samples. The confirmatory analysis by ORNL ETS
showed 226 Ra concentrations from 14.7 to 35 pCi/g. These results were area averaged
over 100 m2 and all fell below the 15 pCi/g guideline. A calculation was also performed to
show conformance with DOE hot spot guidance. Results of Geotech and ORNL soil
sample analyses are given in Table 2.
Radon Measurement Results
Radon decay-product concentration (RDC) measurements for this site were
determined by the alpha-track method. To monitor radon levels, Geotech placed three
alpha-track detectors on the ground floor of the residence located on this property for a
period of approximately one year (from December 21,1987 to January 18,1989). The
average annual working level (WL) of radon progeny concentration, as determined by the
TechVOps-Landauer Corporation, was 0.0047, which is well below the 0.03-WL guideline
given in Table 1.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. All deficiencies noted in an earlier review have been
corrected in the revised completion report, as per the letter to Gretchen A. Pierce from
Harry A. Perry dated September 30, 1993. It is concluded that the site successfully meets
the DOE remedial action objectives.
5
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to 222Rn Average annual radon proge- 0.03 WL
progeny ny concentration (including
background)
(DOE 1990)
Table 2. Results of ORNL analysis of Geotech soil samples
from 417 South 2nd East Street, Monticello Utah (MS00102-MR)
^Ra concentration (pCi/g)
ORNL
sample
No."
XI
X2
X3
X4
X5
X6
X7
X8
X9
X10
Xll
X12
X13
X14
X15
X16
X17
X18
X19
X20
X21
X22
X23
X24
X26
Geotech
sample
No.*
MNH-538
MNH-539
MNH-540
MNH-541
MNH-542
MNH-543
MNH-544
MNH-545
MNH-549
MNH-550
MNI-151
MNI-152
MNI-153
MNI-154
MNI-155
MNI-156
MNI-157
MNI-158
MNI-159
MNI-160
MNI-161
MNI-162
MNH-546
MNH-547
MNH-548
Depth
(cm)
ORNL Geotech
>15
>15
>15
>15
>15
>15
>15
>15
>15
>15
>15
>15
>15
>15
>15
>15
>15
>15
>15
>15
>15
>15
>15
>15
>15
2.1
1.6
2.7
4.1
3.4
4.6
7.1
6.1
1.8
5.9
10.2
5.0
2.6
6.2
2.2
8.2
1.5
2.6
11.4
22.
35.
27.7
15.8
14.7
15.8
2.5
1.7
3.4
4.8
4.2
5.4
8.8
7.2
2.4
7.0
15.6
7.0
3.3
7.3
2.4
13.1
2.2
3.5
12.6
24.9
43.1
36.3
15.9
19.3
18.3
An X-type sample is a split of the sample taken by the remedial action contractor.
Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
REFERENCES
Abramiuk I. N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00102-MR, Address: 417 South 2nd East Street,
Monticello, Utah 84535, Geotech, Grand Junction, Colorado, September 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1993. Environmental Technology Section Procedures Manual. ORNL
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
DOE ID NO.: MS-00102-MR
Property Address: 417 South Second East Street
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
RUST Geotech Inc. of Energy (DOE)
YES NO NOT TAKEN YES NO NOT TAKEN
Ra-226 is ^ 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2.
In-situ [ ] Lab [X]
Interior gamma is < 20 //R/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21,
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Environmental Restoration
Program (Rev. 03/02/87).
[X]* [ ] [ ]
IX] [ ] [ ]
[X] [ ] [ ]
[X] [ ] [ ]
[ ] [X] [ ]
IX] [ ] [ ]
[X] [ ] [ I
IX) I ]
[X] [ 1
I 1
DO [ ] I ]
[ ]
[ ] D<] [ ]
D<] [ ] [ ]
COMMENTS: *The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
SFCERTI FED SFMS-00102
DOE ID NO.: MS-00102-MR
RUST GEOTECH INC. RECOMMENDATION
Based on the RUST Geotech Inc. evaluation, I recommend this property for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
larry A. Bjefry 7 Date
Program Manager
RUST Geotech Inc.
DOE EVALUATION
pO Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental
standards were applied per 40 CFR 192.21.
Environmental Restoration Program
Certification Official
Department of Energy
9 JJ *S~
Date
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
DOE ID NO.: MS-00126-MR
ADDRESS: 548 CIRCLE DRIVE
MONTICELLO, UTAH 84535
DECEMBER 1993
Prepared for
Environmental Restoration Program
Department of Energy
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
FOR
by
RUST Geotech Inc. has been granted authorization to conduct remedial action under
the Environmental Restoration Program. Remedial action was done in accordance
with the U.S. Environmental Protection Agency "Standards for Cleanup of Land and
Buildings Contaminated with Residual Radioactive Materials from Inactive Uranium
Processing Sites," 40 CFR 192.12, 192.20-23.
TABLE OF CONTENTS
Section Page
1.0 SUMMARY . . 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.1.3 Radon Decay-Product Concentration (RDC) Measurement .... 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
i
DOE ID NO.: MS-00126-MR
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Environmental Restoration Program with the primary objective of
reducing the potential hazard to the public due to long-term exposure to
low-level radioactivity associated with the offsite mill tailings derived from
the former U.S. Atomic Energy Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to provide
additional sources of vanadium needed during World War II. Various
government agencies operated the mill until 1947. The AEC obtained the
mill in 1948 and operated it through 1959 under cost-type contracts to
provide both uranium and vanadium. Mill operations were terminated on
January 1, 1960.
The mill processed approximately one million tons of ore during the AEC
operations. Throughout the operating period, mill tailings from the
Monticello millsite were removed from the site and used for construction-
related activities in the vicinity.
1.2 Criteria for Remedial Action
The Environmental Restoration Program adopted the "Standards for
Remedial Actions at Inactive Uranium Processing Sites" (40 CFR Part 192)
for all cleanup activities under the MVP Project. These standards were
prepared by the U.S. Environmental Protection Agency (EPA) to establish
guidelines for the control of tailings piles and the cleanup of buildings and
open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Inclusion Survey Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the EPA
standards. The Remedial Action Contractor was notified of the inclusion
of this property into the Environmental Restoration Program and was
authorized by the DOE to conduct remedial action as required to bring the
property into conformance with the EPA standards.
1
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owners:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
DOE ID NO.: MS-00126-MR
MS-00126-MR
Parcel No. M-306; Lot 9, Upper Townsite
Subdivision, City of Monticello, County of
San Juan, State of Utah
548 Circle Drive
Monticello, Utah 84535

Major Residential (MR)
Oak Ridge National Laboratory
March 10, 1989
RUST Geotech Inc.
April 23, 1990
Sonderegger Construction
P.O. Box 6
Monticello, Utah
June 11, 1990
July 7, 1990
Interior: 0 cubic yards
Exterior: 173 cubic yards
293 square meters (m2)
December 1993
2
DOE ID NO.: MS-00126-MR
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual radioactive
material (Appendix Figure 2.1). Interior assessed Area I (mortar in the
rock fireplace) was excluded from remedial action based on gamma
exposure rates that did not exceed the EPA standards, as discussed in the
REA. Once excavation was complete, the affected areas were resurveyed
for possible remaining residual radioactive material and, upon attaining
satisfactory results, were backfilled with uncontaminated material. The
property was restored to a physical condition comparable to that which
existed prior to remedial action activities.
2.2 Previously Unidentified Contamination
The radiological assessment (excluding assessed Area I) identified
63 cubic yards of contamination, ranging from 6 inches to 24 inches deep,
within the property. The remedial action process included the removal of
approximately 173 cubic yards of residual radioactive material, ranging
from 6 inches to 30 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00126-MR
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by RUST Geotech Inc. during
October 1989, as described in the final REA dated April 1990.
Appendix Figure 2.1 shows the extent of assessed contamination
and identifies the areas recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to backfilling.
Following the gamma scan, soil samples representative of the
6-inch-thick soil layer at the bottom of the excavation were
collected. These samples were blended to form composite
samples representing the verification areas (Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 12 microroentgens per hour (//R/h)
to 43 //R/h (Appendix Figure 2.1). Elevated exposure rates in
Areas V-4 and V-7 were associated with residual radioactive
material left in place in Area V-7 to avoid structural damage to the
house and chimney. The result of analysis for radium-226 in one
composite soil sample of this area was 34.8 picocuries per
gram (pCi/g). The 100 m2 area average was 3.7 pCi/g (Appendix
Table 3.1). Area V-7 also met the hot spot criteria, as indicated in
Appendix Table 3.2. The results of analyses for radium-226 in six
remaining composite soil samples ranged from 1.4 pCi/g to
2.1 pCi/g (Appendix Table 3.3). The composite samples
representing Areas V-4 and V-5 included soil samples taken from
MS-00030-RS (Areas V-2 and V-3).
3.1.3 Radon Decay-Product Concentration (RDC) Measurement
Based on measurements representing an annual average, the
RDC was 0.0123 working level (WL), as indicated in Appendix
Table 3.4. Appendix Figure 2.1 shows the measurement location
on the ground floor (the lowest habitable level of the structure).
The basement was uninhabitable.
4
DOE ID NO.: MS-00126-MR
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by the EPA standards (40 CFR 192.12, 192.20-23),
as indicated in the Certification Data Summary below.
Therefore, the property located at 548 Circle Drive, in Monticello, Utah,
is recommended for certification as required by the Environmental
Restoration Program guidelines, and the appropriate records should be
documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Standards
Shall not exceed 20 //R/h
above background.*
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Results
Range for the ground
floor was 12 //R/h to
32 //R/h.
Annual average was
0.0123 WL.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background1 in the
15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above background1 in any
15-cm-thick soil layer
more than 15 cm below
the surface, averaged
over 100 m2.
< 5 pCi/g above
background.
Soil sample results
ranged from 1.4 pCi/g
to 2.1 pCi/g. Another
soil sample result,
averaged over a 100 m2
area, was 3.7 pCi/g.
*The background exposure rate is approximately 14//R/h.
The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00126-MR
4.0 APPENDIX
Appendix Tables:
Table 3.1 Calculation of Average Radium Concentration
over a 100 m2 Area
Table 3.2 Hot Spot Calculation Results
Table 3.3 Post-Excavation Sample/Measurement Results
Table 3.4 Radon Decay-Product Concentration
Measurement Results
Appendix Figure:
Figure 2.1 Interior and Exterior Extent of Contamination -
RADIOLOGICAL AS-BUILT
MM-JEK: 12-09-93
MS-00126.MR WP51
REV053193
6
Table 3.1
Calculation of Average Radium Concentration over a 100 m2 Area
DOE ID No.: MS-00126-MR
Address: 548 Circle Drive, Monticello, Utah
(CpXAp) + [Crx (1,076-Ap)]
Cav9 = 1,076
Where:
Cava = Radium-226 concentration in pCi/g averaged over a 100 m2
a (1,076 ft2) area.
Cp = Radium-226 concentration in pCi/g of the residual radioactive
material left in place.
Ap = Area in ft2 of the residual radioactive material left in place.
Cr = Radium-226 concentration in pCi/g for the remainder of the
100 m2 area, including excavated and unexcavated areas.
1,076 = Total area in ft2 over which the EPA guideline is applied.
CD AD Cr Cava EPA
Meas. Depth v H a Standard
Area Method* (inches) (pCi/g) (ft2) (pCi/g) (pCi/g) (pCi/g)
V-7 AL 06 - 12 34.8 54 2.1* 3.7 17.0
Therefore, the averaged radium-226 concentration does not exceed the EPA
standard.
*AL = Analytical Laboratory
fWeighted-area average, based on 619 ft2 of Area V-3 at 2.1 pCi/g and 403 ft2 of
background area at 2.0 pCi/g.
7
Table 3.2
Hot Spot Calculation Results
DOE ID No.: MS-00126-MR
Address: 548 Circle Drive, Monticello, Utah
Where:
100
A
Bkg
Shg = [Sgx(100/A)1/a] + Bkg
Hot Spot Limit of radium-226 concentration in pCi/g.
Authorized Limit of radium-226 concentration in pCi/g
(Sg = 5.0 pCi/g for surface soil and 15.0 pCi/g for subsurface soils).
Total area in m2 over which the Hot Spot Limit guideline is applied.
Area in m2 of the hot spot.
Background radium-226 concentration in pCi/g (Bkg = 2.0 pCi/g for
Monticello).
Area
Meas.
Method*
Depth
(inches) (m2) (pCi/g) (pCi/g)
Radium-226 in
Hot Spot Area
(pCi/g)
V-7 AL 06 - 12 5.0 15.0 69.1 34.8
Therefore, the radium-226 concentration in the hot spot area does not exceed the
Hot Spot Limit.
'AL = Analytical Laboratory
8
Table 3.3
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00126-MR
Address: 548 Circle Drive, Monticello, Utah
The analytical uncertainties in the table are reported at the 95-percent confidence
interval. A less-than sign (<) indicates that the minimum detection limit based on
Compton background was reached.
Exposure- Soil
Rate Range Sample Meas. Radium-226 Potassium Thorium
Area (//R/h) Ticket No. Method* (pCi/g) (pCi/g) (pCi/g)
V-l
V-2
V-3
V-4f
V-5f
V-6
V-7*
14
14
14
14
14
13
18
24
20
20
35
18
19
43
MNZ 602
MNZ 603
MNZ 604
MNZ 605
MNZ 606
MNZ 607
MLT 217
AL
AL
AL
AL
AL
AL
AL
1
1.
2.
1,
1.
1,
34.
0.3
0.3
0.3
0.3
0.2
0.3
4.4
17.2
16.5
15.4
16.9
18.3
17.5
7.6
3.6
3.5
3.4
3.5
3.6
3.7
3.3
1.1
0.9
1.4
1.1
0.9
1.0
0.5
0.3
0.2
0.3
0.3
0.2
0.3
See Appendix Figure 2.1 for the verification areas.
*AL = Analytical Laboratory
*The composite samples representing Areas V-4 and V-5 included soil samples taken
from MS-00030-RS.
*Composite soil sample of residual radioactive material left in place.
9
Table 3.4
Radon Decay-Product Concentration Measurement Results
DOE ID No.: MS-00126-MR
Address: 548 Circle Drive, Monticello, Utah
Instrument Type: Terradex Radtrak® Detector
Detector
Number Start Date End Date
Tracks Per
mm2
Radon
Concentration
(pCi/L)
Working
Level
3142042
3142653
3142693
09-12-90
09-12-90
09-12-90
09-04-91
09-04-91
09-04-91
19.6
20.1
20.1
2.41
2.48
2.48
0.0121
0.0124
0.0124
Annual Average: 0.0123
See Appendix Figure 2.1 for the measurement location.
10
42
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
1
12 14 1 6
"T~
18 20
T
22 24 26 28 30 32 34 36
~T~
38
—r—
40 42 44 46 48 5(
i—r
12-16
12-15 2-15
V-6 F X 6 310
13-19
E3—i ONE STORY
FRAME HOUSE
W/UNINHABITABLE
BASEMENT
24 V-6 EX6J 8
13-19
air 18 GX6J15
s SEE DETAIL A
v-3
14-20
12
12-15 24
15 24
v-i 12 30
4-24 D X 9 -<15 V-2
Q 15>/ 14-20
•v<1 5 GARAGE r. .7\ 10
D 6 V-5
V-4 14-18
14-35 12-14 24 15XB C X 6
V-7
18-43
<D
rr-n
I I
12-15
12
V-1
16-17
GROUND FLOOR
17-32
(RDC)
DETAIL A
NOT TO SCALE
LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN /iR/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
POST—REMEDIAL ACTION EXPOSURE —RATE RANGE
BOUNDARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE
POST-REMEDIAL ACTION RADON DECAY-PRODUCT
CONCENTRATION MEASUREMENT LOCATION
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
AREA WITH CONTAMINATION LEFT IN PLACE
ASSESSED AREA I (MORTAR IN ROCK FIREPLACE) -
WAS EXCLUDED FROM REMEDIAL ACTION
ASSESSED AREA H (WOOD SHELVES IN GARAGE)
WAS REMOVED AND REPLACED
SCALE IN FEET
L 20 10 0
RU00126V .2/13/83 TyT/52»
J L
12 14 16
20
18
40
20
fl
J I L
22 24 26 28
THIS DRAWING, PREPARED FOR THE ENVIRONMENTAL RESTORATION
PROGRAM. IS FOR THE SOLE USE OF THE U.S. DEPARTMENT OF
ENERGY ANO ITS CONTRACTORS. IT IS NOT A LANO SURVEY PLAT.
UTILITY LOCATION PLAT, OR OTHER IMPROVEMENT SURVEY PLAT
AND IS NOT TO BE RELIED UPON FOR THE ESTABLISHMENT OF
FENCE. BUILDING, OR OTHER FUTURE IMPROVEMENT LINES.
J L
30 32 34
_J L
36 38
RADIOLOGICAL AS-BUILT
FIGURE 2.1
INTERIOR AND EXTERIOR EXTENT OF CONTAMINATION
U.S. DEPARTMENT OF ENERGY
CUM JUNCTION MtOJCCTt Of riCC COLOOAOO
'rr eg;
£53
548 CIRCLE DRIVE
MONTICELLO, UTAH
MOT MS-00126-MR
GtWCH INCK~3-C00128-V1 — 1» 1
40 42 44 46 48 5C
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE B INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
548 CIRCLE DRIVE
MONTICELLO, UTAH (MS00126)
S.K. Mather
January 1994
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
LIST OF FIGURES v
ACKNOWLEDGMENTS vii
ABSTRACT vii
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIHCATION OF REMEDIAL ACTION 3
GEOTECH SURVEY RESULTS 3
Gamma Measurements 3
Soil Sample Analysis 3
Radon Measurment Analysis 3
ORNL SURVEY RESULTS 6
Gamma Measurements 6
Soil Sample Analysis 6
CONCLUSION 6
REFERENCES 8
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL and Geotech analyses of soil samples from 548 Circle Drive
Monticello, Utah (MS00126) 5
LIST OF FIGURES
1 Property Map 7
v
Aaa^OWLFJXrMENTS
Research for this project was sponsored by the U.S. Department of Energy, Office of
Environmental Restoration, Southwestern Area Programs. The author wishes to
acknowledge M.K. Jensen for analysis of soil samples and AR. Jones and G. A. Pierce for
technical reviews.
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was accepted
into the U.S. Department of Energy's (DOE's) Surplus Facilities Management Program,
with the objectives of restoring the government-owned mill site to safe levels of
radioactivity, disposing of or containing the tailings in an environmentally safe manner, and
performing remedial actions on off-site (vicinity) properties that had been contaminated by
radioactive material resulting from mill operations. During 1990, RUST Geotech Inc., the
remedial action contractor designated by DOE, performed remedial action on the vicinity
property at 548 Circle Drive, Monticello, Utah. The Environmental Technology Section
(ETS) of Oak Ridge National Laboratory was assigned the responsibility of verifying the
data supporting the adequacy of remedial action and confirming the site's compliance with
DOE guidelines. The ETS found that the site successfully meets the DOE remedial
action objectives. All deficiencies noted in the earlier review have been corrected in the
revised completion report. Procedures used by ETS are described in the Environmental
Technology Section Procedures Manual (ORNL, 1993).
vii
1
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT 548 CIRCLE DRIVE
MONTICELLO, UTAH (MS00126)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War II. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Environmental
Assessment Group in the Environmental Technology Section of the Health Sciences Research
Division at Oak Ridge National Laboratory under DOE contract DE-AC05-84OR21400 with Martin
Marietta Energy Systems, Inc.
2
During 1990, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a private residence located at 548 Circle Drive, Monticello, Utah. The
remedial action plan required excavation of all exterior contamination, backfilling with
uncontaminated material, and restoration to a condition comparable to that which existed
prior to remedial action (Geotech 1993). When the excavation stage was completed, the
property was resurveyed, including soil sampling, by Geotech and by an independent
contractor to verify the data supporting the adequacy of remedial action and to confirm
the site's compliance with DOE guidelines. The Environmental Technology Section
(ETS) of Oak Ridge National Laboratory (ORNL) has been designated the Independent
Verification Contractor for the 548 Circle Drive site. This report describes the methods
and results of the verification surveys.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 63 yd3 of mill tailings
6 to 24 inches deep. However, during the actual removal process, a total of 173 yd3 of
contaminated earth and uranium mill tailings, 6 to 30 inches deep, were removed from a
293 m2 area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
GEOTECH SURVEY RESULTS
Gamma Measurements
Gamma exposure rate measurements taken by Geotech over the ground-level of the
residence ranged from 12 to 32 /zR/h. Exterior surface gamma measurements taken from
the excavated areas prior to backfilling ranged from 12 to 43 uR/h.
Elevated beta-gamma measurements were found in the garage on shelves that had
contained ore samples. The measured values exceeded surface contamination guidelines
for beta-gamma levels. Investigation of the ROD (record of decision) regulation's for the
MVP project do not list surface contamination guidelines as an ARAR. Despite this
loophole, the shelves were removed.
Soil Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. These samples were blended to form a
composite soil sample representative of an average over the 6 exterior verification areas.
Geotech's analysis of these samples showed ^Ra concentrations from 1.4 to 2.1 pCi/g in
the composite sample. ORNL ETS was unable to obtain sufficient sample material to
perform a confirmatory analysis. These values are below the DOE guideline value of 15
pCi/g for soil layers >15 cm below the surface (Table 1). Results of Geotech and ORNL
soil sample analyses are given in Table 2. Residual radioactive material located in area V-
7 was left in place to prevent structural damage to the fireplace and chimney. ORNL
identified this area as a point source measuring 51 uR/h. ORNL was able to obtain a split
sample for area V-7, which showed a ^Ra concentration of 34 pCi/g. This result, when
averaged over 100 m2 and used in the hot spot calculation, is below the DOE guidelines
for subsurface and Hot Spot guidelines.
Radon Measurement Results
Radon decay-product concentration (RDC) measurements for this site were
determined by the alpha-track method. To monitor radon levels, Geotech placed three
Alpha-track detectors on the ground floor of the residence located on this property for a
period of approximately one year (from September 12, 1990 to September 4, 1991). The
IVC was present during placement and retrieval of the detectors to verify the RDC
measurements. The average annual working level (WL) of radon progeny concentration,
as determined by the Tech./Ops-Landauer Corporation, was 0.0123, which is below the
0.03-WL guideline given in Table 1. The procedures and methods used to obtain the
annual average WL are deemed adequate and the results accurate by the IVC.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to ^Rn
progeny
Average annual radon proge-
ny concentration (including
background)
0.03 WL
(DOE 1990)
5
Table 2. Results of ORNL and Geotech analyses of soil samples
from 548 Circle Drive, Utah (MS00126)
""Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth
No." No.* (cm) Confirmatory* ORNL* Geotech
XI MNZ-602 >15
X2 MNZ-603 >15
X3 MNZ-604 >15
X4* MNZ-605 >15
X5* MNZ-606 >15
X6 MNZ-607 >15
X7 MLT-217 >15
VI
V2
V3
V4*
V5*
V6
1.8
1.7
2.1
1.5
1.4
1.7
31.6 34.8
1.3
1.5
1.5
1.3
1.4
1.4
" An X-type sample is a split of the sample taken by the remedial action
contractor.
* Soil samples representative of the bottom 15-cm (6-in.) soil layers of the
excavated areas were taken by RUST Geotech Inc., and these samples were blended to
form composite soil samples, which represent an average over verification areas.
c ORNL was unable to obtain sufficient sample material to perform a comfirmatory
analysis with the exception of verification area V-7.
d Composite samples collected by ORNL from approximately the same excavated
locations sampled by Geotech.
* Composite samples from area V-4 and V-5 include soil samples from the adjacent
property MS00030.
6
ORNL SURVEY RESULTS
Gamma Measurements
Measurements taken by ORNL over the ground surface in the excavated areas prior
to backfilling ranged from 13 to 51 jiR/h (Figure 1).
During the ORNL survey of the property the condition of the garage and the
contamination left in place under the fireplace was noted and mentioned. The RAC
stated that these items would be addressed in phase 2 in fiscal year 1991 but further
investigation determined these items were outside the scope of work per program
guidance.
The Excavation Control and Verification Log dated 7/9/92 indicated that readings on
the floor and shelves of the garage are at background levels. ORNL ETS has not been
able to gain access to this area and will accept this log as verification of the garages
radiological status.
Soil Sample Analysis
ORNL sampled 6 of the excavated areas prior to backfilling, collecting aliquots
representative of those areas from the bottom 15-cm (6-in.) soil layers. These samples
were blended to form 6 composite soil samples representative of an average over the
exterior verification areas. ORNL's analysis of these composite samples showed ^Ra
concentrations of 1.3 and 1.5 pCi/g. These values are below the DOE guideline value of
15 pCi/g for soil layers >15 cm below the surface (Table 1). Results of ORNL sample
analyses are given in Table 2.
CONCLUSION
The results of all Geotech and ORNL soil sample analyses show that radionuclide
concentrations are within applicable DOE guidelines. Based upon the results of the post-
remedial-action data, which are confirmed by the verification assessment data, these
radiological measurements fall below the limits prescribed by DOE guidelines. It is
concluded that all deficiencies noted in an earlier review have been identified by the RAC
and resolved as discussed in a meeting between Geotech and ORNL on October 15, 1993
and that the site successfully meets the DOE remedial action objectives.
x-\ ~ X-~
V6
/6 6pR/h
SINGLE STORY
FRAME HOUSE
UJ
V6 >
or
z V1
X '
LiR
V3
DC
0\
V2
V5
V2 V4
00030 MS
JfcL*
13-51 fiR/h
13-19 AiR/h
13-19 yLiR/h
V4
V5
V6
VI I 13-17 //R/h
V2 | 13-22 fiR/h
vT| 1 3-36 //R/h
EXPLANATION
CONCRETE
ASSESSED AREA OF
CONTAMINATION
EXCAVATED
21 AREA
REMAINING
CONTAMINATION
RDC
MEASUREMENT
AREA IDENTIFIER &
COMPOSITE SAMPLE
IDENTIFIER OF
B1 | AVERAGED AREA &
BIASED SAMPLE
-X- POINT SOURCE
FEET
10 SO
3 6
METERS
30
MS00126
548 CIRCLE DRIVE
MONTICELLO, UTAH
Figure 1. Property Map ARJ 9/15/93
8
REFERENCES
Abramiuk, LN. et al. 1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction, Colorado,
for the U.S. Department of Energy, Surplus Facilities Management Program,
Richland, Washington.
Geotech 1992, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00126, Address: 548 Circle Drive, Monticello, Utah 84535,
Geotech, Grand Junction, Colorado, October, 1992.
U.S. DOE 1990. Verification and Certification Protocol for ihe Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1993. Environmental Technology Section Procedures Manual. ORNL/TM-
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
DOE ID NO.: MS-00126-MR
Property Address: 548 Circle Drive
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
RUST Geotech Inc. of Energy (DOE)
YES NO NOT TAKEN YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2.
In-situ [ ] Lab [X]
Interior gamma is < 20 //R/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21,
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Environmental Restoration
Program (Rev. 03/02/87).
[X]* [ ] [ ]
[X] [ ] [ ]
[X] [ ] [ ]
[X] [ ] [ ]
[ 1 [X] [ ]
[X] [ ] [ 1
[*] [ 1 t 1
[*l [ ] [ 1
M [ ] [ ]
[ ] [X] [ 1
[X] [ ] [ ] [/] [ 1 [ 1
COMMENTS: *The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
SFCERTI FED SFMS-00126
DOE ID NO.: MS-00126-MR
RUST GEOTECH INC. RECOMMENDATION
Based on the RUST Geotech Inc. evaluation, I recommend this property for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with application of supplemental
standards per 40 CFR 192.21.
Program Manager
RUST Geotech Inc.
Date
DOE EVALUATION
[X] Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with application of
supplemental standards per 40 CFR 192.21.
EnvironmentafRestoratiori Program
Certification Official
Department of Energy
Date
DOE ID NO.: MS-00132.
Property Addresss: 97 North Second West Street
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
RUST Geotech Inc. of Energy (DOE)
YES NO NOT TAKEN YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2. [X]* [ ] [ ] [ ] [ ] [ ]
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2. [X] [ ] [ ] MUM
In-situ [ ] Lab [X]
Interior gamma is < 20 //R/h
above background in any
occupied or habitable
structure. [X] [ ] [ ] [ ] [ ] [ ]
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level. [X] [ ] [ ] [ ] [ ] [ ]
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21. [ ] [X] [ ] [ ] [ ] [ ]
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Environmental Restoration [ ] [ ] [X] [ ] [ ] [ ]
Program (Rev. 03/02/87).
COMMENTS: *The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
llllllillll iiiiiiilH
SFCERTI FED SFMS-00132
•
93
ENT RECORDS MANAG'
f
DOE ID NO.: MS-0013.-
RUST GEOTECH INC. RECOMMENDATION
Based on the RUST Geotech Inc. evaluation, I recommend this property for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
Harry A. Perry ^ Date
Program -Manager
RUST Geotech Inc.
DOE UMTRA EVALUATION
Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental
standards were applied per 40 CFR 192.21.
Environmental Restoratio
Certification Official
Department of Energy
Date
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00132-RS
ADDRESS: 97 NORTH SECOND WEST STREET
MONTICELLO, UTAH 84535
AUGUST 1993
Prepared for
Environmental Restoration Program
Department of Energy
RUST Geotech Inc. has been granted authorization to conduct remedial action under
the Environmental Restoration Program. Remedial action was done in accordance
with the U.S. Environmental Protection Agency "Standards for Cleanup of Land and
Buildings Contaminated with Residual Radioactive Materials from Inactive Uranium
Processing Sites," 40 CFR 192.12, 192.20-23.
by
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
•llilltllll •Illlllllll SFOCPLRPTS SFMS-00132
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.1.3 Radon Decay-Product Concentration (RDC) Measurement .... 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
i
DOE ID NO.: MS-00132-RS
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Environmental Restoration Program with the primary objective of
reducing the potential hazard to the public due to long-term exposure to
low-level radioactivity associated with the offsite mill tailings derived from
the former U.S. Atomic Energy Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to provide
additional sources of vanadium needed during World War II. Various
government agencies operated the mill until 1947. The AEC obtained the
mill in 1948 and operated it through 1959 under cost-type contracts to
provide both uranium and vanadium. Mill operations were terminated on
January 1, 1960.
The mill processed approximately one million tons of ore during the AEC
operations. Throughout the operating period, mill tailings from the
Monticello millsite were removed from the site and used for construction-
related activities in the vicinity.
1.2 Criteria for Remedial Action
The Environmental Restoration Program adopted the "Standards for
Remedial Actions at Inactive Uranium Processing Sites" (40 CFR Part 192)
for all cleanup activities under the MVP Project. These standards were
prepared by the U.S. Environmental Protection Agency (EPA) to establish
guidelines for the control of tailings piles and the cleanup of buildings and
open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Inclusion Survey Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the EPA
standards. The Remedial Action Contractor was notified of the inclusion
of this property into the Environmental Restoration Program and was
authorized by the DOE to conduct remedial action as required to bring the
property into conformance with the EPA standards.
1
DOE ID NO.: MS-00132-RS
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
MS-00132-RS
Parcel No. M-265; beginning at the NE corner of Lot 4, Block L, Monticello
Townsite Survey; west 130 feet, south 150 feet, east 130 feet, north 150 feet
to the point of beginning, County of San Juan, State of Utah
Property Address:
Property Owners:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
97 North Second West Street
Monticello, Utah 84535

Residential Simple (RS)
Oak Ridge National Laboratory
January 25, 1990
RUST Geotech Inc.
October 17, 1990
Crowley Construction
East Route
Monticello, Utah
May 21, 1991
May 30, 1991
Interior:
Exterior:
0 cubic yards
20 cubic yards
51 square meters (m2)
August 1993
2
DOE ID NO.: MS-00132-RS
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual radioactive
material (Appendix Figure 2.1). Once excavation was complete, the
affected areas were resurveyed for possible remaining residual radioactive
material and, upon attaining satisfactory results, were backfilled with
uncontaminated material. The property was restored to a physical
condition comparable to that which existed prior to remedial action
activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified 16 cubic yards of contamination,
ranging from 6 inches to 15 inches deep, within the property. The
remedial action process included the removal of approximately 20 cubic
yards of residual radioactive material, 12 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00132-RS
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by RUST Geotech Inc. during
July 1990, as described in the final REA dated October 1990.
Appendix Figure 2.1 shows the extent of assessed contamination
and identifies the areas recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to backfilling.
Following the gamma scan, soil samples representative of the
6-inch-thick soil layer at the bottom of the excavation were
collected. These samples were blended to form a composite
sample representing the verification area (Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 11 microroentgens per hour (//R/h)
to 28 //R/h (Appendix Figure 2.1). The result of analysis for
radium-226 in one composite soil sample was 1.9 picocuries per
gram (pCi/g), as indicated in Appendix Table 3.1.
3.1.3 Radon Decay-Product Concentration (RDC) Measurement
Based on measurements representing an annual average, the
RDC was 0.0085 working level (WL), as indicated in Appendix
Table 3.2. Appendix Figure 2.1 shows the measurement location
in the basement (the lowest habitable level of the structure).
4
DOE ID NO.: MS-00132-RS
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by the EPA standards (40 CFR 192.12, 192.20-23),
as indicated in the Certification Data Summary below.
Therefore, the property located at 97 North Second West Street, in
Monticello, Utah, is recommended for certification as required by the
Environmental Restoration Program guidelines, and the appropriate
records should be documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Standards
Shall not exceed 20 //R/h
above background.*
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Results
Range for the basement
was 12 //R/h to 14 //R/h.
Annual average was
0.0085 WL.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above backgroundf in the
15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above background1 in any
15-cm-thick soil layer
more than 15 cm below
the surface, averaged
over 100 m2.
< 5 pCi/g above
background.
Soil sample result was
1.9 pCi/g.
*The background exposure rate is approximately 14 //R/h.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00132-RS
4.0 APPENDIX
Appendix Tables:
Table 3.1 Post-Excavation Sample/Measurement Results
Table 3.2 Radon Decay-Product Concentration
Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
MM-DNM:08-03-93
MS-00132.RS WP51
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00132-RS
Address: 97 North Second West Street, Monticello, Utah
The analytical uncertainties in the table are reported at the 95-percent confidence
interval.
Exposure- Soil
Rate Range Sample Meas. Radium-226 Potassium Thorium
Area ipR/h) Ticket No. Method* (pCi/g) (pCi/g) (pCi/g)
V-l 14-28 NAB 992 AL 1.9 ± 0.3 22.8 ± 3.2 0.8 ± 0.3
See Appendix Figure 2.1 for the verification area.
*AL = Analytical Laboratory
7
Table 3.2
Radon Decay-Product Concentration Measurement Results
DOE ID No.: MS-00132-RS
Address: 97 North Second West Street, Monticello, Utah
Instrument Type: Terradex Radtrak® Detector
Detector
Number Start Date End Date
Tracks Per
mm2
Radon
Concentration
(pCi/L)
Working
Level
3468203
3468130
3468193
01-07-92
01-07-92
01-07-92
01-06-93
01-06-93
01-06-93
17.0
17.2
17.8
1.65
1.67
1.74
0.0083
0.0084
0.0087
Annual Average: 0.0085
See Appendix Figure 2.1 for the measurement location.
8
10
30
28 -
26 -
24 -
22 -
20 -
18 -
16
14 -
12 -
12 14 16 20 22 24
10
26 28
I
WEST FIRST NORTH STREET
LLL LLL ///
V-1
14-28
1
13-16
RDC
3-15 ONE STORY
BRICK AND FRAME
HOUSE W/BASEMENT
Ul
or
V)
12-4 in
Lu
J o o r J Lu
CO
1—
o 13-16
SH ED
0 2
GARAGE
11-12
15
B X 6 12
Y 12
0
v-i 13-16
14-28
o 13-16
RM00132V 08/05/93 TMT/529
I
10 12 1 4 16 18 20 22 24 26 28
30 32 34 36 38
®
®
I 1
I I
12-15
12
LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN /u.R/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE
POST-REMEDIAL ACTION RADON DECAY-PRODUCT
CONCENTRATION MEASUREMENT LOCATION
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
THIS DRAWING, PREPARED FOR THE ENVIRONMENTAL RESTORATION
PROGRAM. IS FOR THE SOLE USE OF THE U.S. DEPARTMENT OF
ENERGY AND ITS CONTRACTORS. IT IS NOT A LAND SURVEY PLAT,
UTILITY LOCATION PLAT, OR OTHER IMPROVEMENT SURVEY PLAT
AND IS NOT TO BE RELIED UPON FOR THE ESTABLISHMENT OF
FENCE, BUILDING, OR OTHER FUTURE IMPROVEMENT LINES.
V-1
16-17
SCALE IN FEET
20 10 0 20 40 NORTH
40
RADIOLOGICAL AS-BUILT
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
RESIDENCE-NO. OF OCCUPANTS
NON—RESIOENCE—MAN—KRS./WK.
INSTRUMENT NO.
SURVEY OATE
VERIFICATION
BY CK. A.E. APP. NO. OATE CK. A.C. APP.
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE. COLORADO
8-13
MI
97 NORTH SECOND WEST ST.
MONTICELLO, UTAH
APPROVAL
GIOTECH INC
DATE I APPROVAL DOE DATE
OOE.0NO. MS-00132-RS
3-B00132-V1s«T.1 or 1
30
28
26
24
22
20
18
16
14
12
10
30 32 34 36 38 40
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS. INC.
GRAND JUNCTION OFFICE
P. O. BOX 2567
GRAND JUNCTION, COLORADO 81502
SEP 2 ?, 1993
Donald N. Leske
Project Manager, Monticello Projects
U.S. Department of Energy
P. 0. Box 2567
Grand Junction, 81502
Dear Mr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil, indoor radon daughter
concentration, and indoor gamma exposure rate at this property.
Therefore, this property is recommended for certification by the U.S. Depart
ment of Energy.
Sincerely,
Gretchen A. Pierce
MVP/IVC Project Manager
Environmental Assessment Group
Location Number: MS00132
Location Address: 97 North 2nd West Street
Monticello. Utah 84535
Property Owner:

Attachments
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE B INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
97 NORTH 2ND WEST STREET
MONTICELLO, UTAH (MS00132)
AR. Jones
September 1993
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
LIST OF FIGURES v
ACKNOWLEDGMENTS vii
ABSTRACT vii
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIHCATION OF REMEDIAL ACTION 3
GEOTECH SURVEY RESULTS 3
Gamma Measurements 3
Soil Sample Analysis 3
Radon Measurment Analysis 3
ORNL SURVEY RESULTS 6
Gamma Measurements 6
Soil Sample Analysis 6
CONCLUSION 6
REFERENCES 8
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL and Geotech analyses of soil samples from 97 North 2nd West
Street Monticello, Utah (MS00132) 5
LIST OF FIGURES
1 Property Map 7
v
ACKNOWLEDGMENTS
Research for this project was sponsored by the U.S. Department of Energy, Office of
Environmental Restoration, Southwestern Area Programs. The author wishes to
acknowledge G.A. Pierce for analysis of soil samples and G.K. Stowe and M.K. Jensen for
technical reviews.
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was accepted
into the U.S. Department of Energy's (DOE's) Surplus Facilities Management Program,
with the objectives of restoring the government-owned mill site to safe levels of
radioactivity, disposing of or containing the tailings in an environmentally safe manner, and
performing remedial actions on off-site (vicinity) properties that had been contaminated by
radioactive material resulting from mill operations. During 1991, RUST Geotech Inc., the
remedial action contractor designated by DOE, performed remedial action on the vicinity
property at 97 North 2nd West Street, Monticello, Utah. The Environmental Technology
Section (ETS) of Oak Ridge National Laboratory was assigned the responsibility of
verifying the data supporting the adequacy of remedial action and confirming the site's
compliance with DOE guidelines. The ETS found that the site successfully meets the
DOE remedial action objectives. Procedures used by ETS are described in the
Environmental Technology Section Procedures Manual (ORNL, 1993).
vii
1
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT 97 NORTH 2ND WEST STREET
MONTICELLO, UTAH (MS00132)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War II. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Environmental
Assessment Group in the Environmental Technology Section of the Health Sciences Research
Division at Oak Ridge National Laboratory under DOE contract DE-AC05-84OR21400 with Martin
Marietta Energy Systems, Inc.
2
During 1991, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a private residence located at 97 North 2nd West Street, Monticello, Utah.
The remedial action plan required excavation of all exterior contamination, backfilling with
uncontaminated material, and restoration to a condition comparable to that which existed
prior to remedial action (Geotech 1993). When the excavation stage was completed, the
property was resurveyed, including soil sampling, by Geotech and by an independent
contractor to verify the data supporting the adequacy of remedial action and to confirm
the site's compliance with DOE guidelines. The Environmental Technology Section
(ETS) of Oak Ridge National Laboratory (ORNL) has been designated the Independent
Verification Contractor for the 97 North 2nd West Street site. This report describes the
methods and results of the verification surveys.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 16 yd3 of mill tailings
6 to 15 inches deep. However, during the actual removal process, a total of 20 yd3 of
contaminated earth and uranium mill tailings, 12 inches deep, were removed from a 51 m2
area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
GEOTECH SURVEY RESULTS
Gamma Measurements
Gamma exposure rate measurements taken by Geotech over the ground-level of the
residence ranged from 12 to 14 /iR/h. Exterior surface gamma measurements taken from
the excavated areas prior to backfilling ranged from 14 to 28 uR/h.
Soil Sample Analysts
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. These samples were blended to form a
composite soil sample representative of an average over the exterior verification area.
Geotech's analysis of this sample showed ^Ra concentrations of 1.9 pCi/g in the
composite sample. ORNL ETS was unable to obtain a soil sample to perform a
confirmatory analysis. This value is below the DOE guideline value of 15 pCi/g for soil
layers >15 cm below the surface (Table 1). Results of Geotech soil sample analyses are
given in Table 2.
Radon Measurement Results
Radon decay-product concentration (RDC) measurements for this site were
determined by the alpha-track method. To monitor radon levels, Geotech placed three
Alpha-track detectors on the ground floor of the residence located on this property for a
period of approximately one year (from January 7, 1992 to January 6, 1993). The PVC
was present during placement and retrieval of the detectors to verify the RDC
measurements. The average annual working level (WL) of radon progeny concentration,
as determined by the Tech./Ops-Landauer Corporation, was 0.0085, which is well below
the 0.03-WL guideline given in Table 1. The procedures and methods used to obtain the
annual average WL are deemed adequate and the results accurate by the rVC.
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Exposure to ^Rn
progeny
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
Average annual radon proge-
ny concentration (including
background)
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
0.03 WL
(DOE 1990)
Table 2 Results of ORNL and Geotech analyses of soil samples
from 97 North 2nd West Street, Utah (MS00132)
aRa concentration (pO/g)
ORNL Geotech
sample sample Depth
No." No* (cm) Confirmatory1 ORNL* Geotech
XI NAB-992 >15 * 1.9
VI 1.9
" An X-type sample is a split of the sample taken by the remedial action
contractor.
b Soil samples representative of the bottom 15-cm (6-in.) soil layers of the
excavated areas were taken by RUST Geotech Inc., and these samples were blended to
form composite soil samples, which represent an average over verification areas.
e ORNL performed analysis on aliquots of the composite samples taken by
Geotech (confirmatory).
d Composite samples collected by ORNL from approximately the same excavated
locations sampled by Geotech.
ORNL was unable to obtain the composite sample taken by Geotech.
6
ORNL SURVEY RESULTS
Gamma Measurements
Measurements taken by ORNL over the ground surface in the excavated areas prior
to backfilling ranged from 14 to 23 uR/h (Figure 1).
Soil Sample Analysis
ORNL sampled the excavated area prior to backfilling, collecting aliquots
representative of those areas from the bottom 15-cm (6-in.) soil layers. These samples
were blended to form a composite soil sample representative of an average over the
exterior verification area. ORNL's analysis of this composite sample showed "^Ra
concentrations of 1.9 pCi/g. This value is below the DOE guideline value of 15 pCi/g for
soil layers >15 cm below the surface (Table 1). Results of ORNL sample analyses are
given in Table 2.
CONCLUSION
The results of all Geotech and ORNL soil sample analyses show that radionuclide
concentrations are within applicable DOE guidelines. Based upon the results of the post-
remedial-action data, which are confirmed by the verification assessment data, these
radiological measurements fall below the limits prescribed by DOE guidelines. It is
concluded that the site successfully meets the DOE remedial action objectives.
t-
WEST 1ST NORTH STREET
-4 r
i
i
RDC Lu
cc <2
OQ^LU
LL. CO Lu I
oo0cpg
or? LO
L_
LU
X
<
<
En
f r*-i
1TJLT--^_X^.^
V1 I 14-23 fiR/h
X—
EXPLANATION
CONCRETE
ASSESSED AREA OF
CONTAMINATION
EXCAVATED
AREA
REMAINING
CONTAMINATION
RDC
MEASUREMENT
AREA IDENTIFIER &c
COMPOSITE SAMPLE
IDENTIFIER OF
AVERAGED AREA Sc
BIASED SAMPLE
LU
LU
CC
\—
CO
CO
LU
CM
I
I— cc o
N.
1
FEET
10 20
3 i
METERS
MS00132
97 NORTH 2ND WEST STREET
MONTICELLO, UTAH
Figure 1. Property Mop ARJ 9/15/93
8
REFERENCES
Abramiuk, LN. et al. 1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction, Colorado,
for the U.S. Department of Energy, Surplus Facilities Management Program,
Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00132, Address: 97 North 2nd West Street, Monticello,
Utah 84535, Geotech, Grand Junction, Colorado, August 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1993. Environmental Technology Section Procedures Manual. ORNL/TM-
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00141-MR
ADDRESS: 393 EAST THIRD SOUTH STREET
MONTICELLO, UTAH 84535
SEPTEMBER 1993
Prepared for
Environmental Restoration Program
Department of Energy
by
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
' HafryA. Perry
Program Manager
RUST Geotech Inc. has been granted authorization to conduct remedial action under
the Environmental Restoration Program. Remedial action was done in accordance
with the U.S. Environmental Protection Agency "Standards for Cleanup of Land and
Buildings Contaminated with Residual Radioactive Materials from Inactive Uranium
Processing Sites," 40 CFR 192.12, 192.20-23.
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.1.3 Radon Decay-Product Concentration (RDC) Measurement .... 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
i
DOE ID NO.: MS-00141-MR
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Environmental Restoration Program with the primary objective of
reducing the potential hazard to the public due to long-term exposure to
low-level radioactivity associated with the offsite mill taiiings derived from
the former U.S. Atomic Energy Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to provide
additional sources of vanadium needed during World War II. Various
government agencies operated the mill until 1947. The AEC obtained the
mill in 1948 and operated it through 1959 under cost-type contracts to
provide both uranium and vanadium. Mill operations were terminated on
January 1, 1960.
The mill processed approximately one million tons of ore during the AEC
operations. Throughout the operating period, mill tailings from the
Monticello millsite were removed from the site and used for construction-
related activities in the vicinity.
1.2 Criteria for Remedial Action
The Environmental Restoration Program adopted the "Standards for
Remedial Actions at Inactive Uranium Processing Sites" (40 CFR Part 192)
for all cleanup activities under the MVP Project. These standards were
prepared by the U.S. Environmental Protection Agency (EPA) to establish
guidelines for the control of tailings piles and the cleanup of buildings and
open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE), which determined that the property
contained mill tailings (residual radioactive material) exceeding the EPA
standards. The Remedial Action Contractor was notified of the inclusion
of this property into the Environmental Restoration Program and was
authorized by the DOE to conduct remedial action as required to bring the
property into conformance with the EPA standards.
1
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owners:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
DOE ID NO.: MS-00141-MR
MS-00141-MR
Parcel No. M-605 of the Supplemental Plat
in the NW4 of Section 31, T33S., R24E.,
Salt Lake Base Meridian, City of Monticello,
County of San Juan, State of Utah
393 East Third South Street
Monticello, Utah 84535

Major Residential (MR)
Not applicable; historical inclusion by the
DOE
November 1, 1984
RUST Geotech Inc.
May 9, 1986
Sonderegger Construction
P.O. Box 6
Monticello, Utah
October 7, 1986
October 28, 1986
Interior: 20 cubic yards
Exterior: 528 cubic yards
2,120 square meters (m2)
September 1993
2
DOE ID NO.: MS-00141-MR
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of interior and exterior residual
radioactive material (Appendix Figure 2.1). Once excavation was
complete, the affected areas were resurveyed for possible remaining
residual radioactive material and, upon attaining satisfactory results, were
backfilled with uncontaminated material. The property was restored to a
physical condition comparable to that which existed prior to remedial
action activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified 375 cubic yards of contamination,
ranging from 6 inches to 24 inches deep, within the property. The
remedial action process included the removal of approximately 548 cubic
yards of residual radioactive material, ranging from 6 inches to 30 inches
deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00141-MR
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by Bendix Field Engineering
Corporation during October 1985, as described in the final REA
dated May 1986. Appendix Figure 2.1 shows the extent of
assessed contamination and identifies the areas recommended to
undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to backfilling.
Following the gamma scan, soil samples representative of the
6-inch-thick soil layer at the bottom of the exterior excavation
were collected. These samples were blended to form composite
samples representing the exterior verification areas (Appendix
Figure 2.1).
Interior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 18 microroentgens per hour (//R/h)
to 20 //R/h for the remediated crawl space (Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 15 //R/h to 25 //R/h (Appendix
Figure 2.1). The results of analyses for radium-226 in
17 composite soil samples ranged from 1.4 picocuries per
gram (pCi/g) to 8.7 pCi/g (Appendix Table 3.1).
3.1.3 Radon Decay-Product Concentration (RDC) Measurement
Based on measurements representing an annual average, the
RDC was 0.0078 working level (WL), as indicated in Appendix
Table 3.2. Appendix Figure 2.1 shows the measurement location
on the ground floor (the lowest habitable level of the structure).
4
DOE ID NO.: MS-00141-MR
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by the EPA standards (40 CFR 192.12, 192.20-23),
as indicated in the Certification Data Summary below.
Therefore, the property located at 393 East Third South Street, in
Monticello, Utah, is recommended for certification as required by the
Environmental Restoration Program guidelines, and the appropriate
records should be documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Standards
Shall not exceed 20 //R/h
above background.*
Survey Results
Range for the remediated
crawl space was 18 //R/h
to 20 //R/h. Since no
elevated readings were
detected, the ground
floor was not scanned.
Radon Decay-Product
Concentration:
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Annual average was
0.0078 WL.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above backgroundt in the
15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above backgroundf in any
15-cm-thick soil layer
more than 15 cm below
the surface, averaged
over 100 m2.
< 5 pCi/g above
background.
Soil sample results
ranged from 1.4 pCi/g
to 8.7 pCi/g.
*The background exposure rate is approximately 16 //R/h.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00141-MR
4.0 APPENDIX
Appendix Tables:
Table 3.1 Post-Excavation Sample/Measurement Results
Table 3.2 Radon Decay-Product Concentration
Measurement Results
Appendix Figure:
Figure 2.1 Interior and Exterior Extent of Contamination -
RADIOLOGICAL AS-BUILT
MM-JEK:08-11-93
MS-00141.MR WP51
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00141-MR
Address: 393 East Third South Street, Monticello, Utah
The analytical uncertainties in the table are reported at the 95-percent confidence
interval.
Area
Exposure-
Rate Range
(//R/h)
Soil
Sample
Ticket No.
Meas.
Method*
Radium-226
(pCi/g)
Potassium
(pCi/g)
Thorium
(pCi/g)
V-2
V-3
V-4
V-5
V-6
V-7
V-8
V-9
V-10
V-ll
V-12
V-13
V-14
V-15
V-16
V-17
V-18
V-l
17
18
18
16
16
17
18
17
16
16
18
16
18
17
18
18
16
24
25
25
21
21
21
21
20
20
21
22
21
23
23
21
21
22
MMU 316
MMU 317
MMU 318
MMU 319
MMU 320
MMU 321
MMU 322
MMU 323
MMU
MMU
324
325
MMU 326
MMU 327
MMU
MMU
328
329
MMU 330
MMU 331
MMU 332
EXTERIOR
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
INTERIOR
4.3
8.7
4.6
2.2
3.
4.
3.
1.
1.
1.
3.
2.5
5.1
6.3
4.8
3.9
4.1
0.4
0.8
0.2
0.2
0.3
0.3
0.4
0.5
0.4
0.4
0.4
20.2
19.3
22.9
23.9
21.6
21.7
21.2
21.7
22.8
24.0
22.2
22.6
22.5
23.1
21.7
20.1
22.3
5.4
5.4
5.9
6.1
5.7
5.7
5.6
5.3
5.5
5.4
5.5
5.3
5.1
5.4
1.4
1.1
1.2
0.8
1.1
1.2
0.9
1.2
1.4
0.9
1.3
0.8
1.0
1.0
0.9
0.8
0.9
0.3
0.3
0.3
0.2
0.3
0.3
0.3
0.3
0.3
0.2
0.3
0.2
0.3
0.2
0.2
0.2
0.2
18 - 20 Not applicable
See Appendix Figure 2.1 for the verification areas.
*AL = Analytical Laboratory
7
Table 3.2
Radon Decay-Product Concentration Measurement Results
DOE ID No.: MS-00141-MR
Address: 393 East Third South Street, Monticello, Utah
Instrument Type: Terradex Radtrak® Detector
Detector
Number Start Date End Date
Tracks Per
mm2
Radon
Concentration
(pCi/L)
Working
Level
1254129
1255885
1254847
06-27-89
06-27-89
06-27-89
05-29-90
05-29-90
05-29-90
15.0
12.6
12.6
1.73
1.46
1.46
0.0087
0.0073
0.0073
Annual Average: 0.0078
See Appendix Figure 2.1 for the measurement location.
8
40
38
36
34
32
30
28
26
24
22
20
18
1 6
14
12
10
1
40 42 44 46 48 51
V-1 1 V-10 V-l 2
16-21 16-20 18-22 18-23 16-22
V-15
V-l J 17-23
16-21
® E 15-17
V-1 6
18-21
V-17 SHED
16-17 18-21
WOOD
ADDITION
18-20
18-19 V-4
18-25
(£U<S> :--T R AIL E R H 0 U S E-X-M-^RDC):
®<5>LH I K6
SHED
t T 16-17
f—r—V\ I
G X 9 V-5 V-7 V-9 HX12J 8 24
16-21 17-21 17-20 V-3
30
18-25
V-6 V-8 V-10 V-1 3 V-2 V-1
16-21 18-21 16-20 17-24 16-21 18-20
SCALE IN FEET
20 10 0 20
RU0014IV 09/20/BJ TUT/529
14 16 18
40
20
UJ
UJ or
i—
i/i
I
h-=> O
in a a:
<
®
<D
rr-.n
U_J
12-15
12
v-i
16-17
THIS DRAWING. PREPARED FOR THE ENVIRONMENTAL RESTORATION
PROGRAM. IS FOR THE SOLE USE OF THE U.S. DEPARTMENT OF
ENERGY ANO ITS CONTRACTORS. IT IS NOT A LAND SURVEY PLAT,
UTILITY LOCATION PLAT, OR OTHER IMPROVEMENT SURVEY PLAT
ANO IS NOT TO BE RELIED UPON FOR THE ESTABLISHMENT OF
FENCE, BUILDING, OR OTHER FUTURE IMPROVEMENT LINES.
i—r
LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN /iR/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
POST-REMEDIAL ACTION EXPOSURE —RATE RANGE
BOUNDARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION AREA IDENTIFIER AND
EXCAVATION EXPOSURE-RATE RANGE
POST-REMEDIAL ACTION RADON DECAY-PRODUCT
CONCENTRATION MEASUREMENT LOCATION
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
RADIOLOGICAL AS-BUILT
FIGURE 2.1
INTERIOR AND EXTERIOR EXTENT OF CONTAMINATION
22 24 26 28 30 32 34 36 38
llW tMTf
40
U.S. DEPARTMENT OF ENERGY
CHAMD JUNCTION PROJECTS OWCI. COLORADO
Cute** ftf? I 4* 3&
393 EAST THIRD SOUTH STREET
MONTICELLO, UTAH
I Ml |tfW«,MC
GKJTBCH INC
"•»• MS-00I41-MR
»~— J-C1023-W
42 44 46 48 5C
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
393 EAST 3RD SOUTH STREET
MONTICELLO, UTAH (MS00141-MR)
AR. Jones
November 1993
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
(INTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION : 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
Radon Measurement Results 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from 393 East 3rd South Street,
Monticello, Utah (MS00141-MR) 5
v
A<^OWIJ2LXJMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge G.A Pierce for analysis of soil samples and G.K. Stowe and M. K.
Jensen for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1986, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at 393
East 3rd South Street, Monticello, Utah. The Environmental Technology Section
(ETS) of Oak Ridge National Laboratory was assigned the responsibility of
verifying the data supporting the adequacy of remedial action and confinmng the
site's compliance with DOE guidelines. The ETS found that the site successfully
meets the DOE remedial action objectives. All deficiencies discovered in the
initial review have been corrected in the revised completion report. Procedures
used by the ETS are described in the Environmental Technology Section
Procedures Manual (ORNL, 1993).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT 393 EAST 3RD SOUTH STREET
MONTICELLO, UTAH (MS00141-MR)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War II. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Environmental
Assessment Group in the Environmental Technology Section of the Health Sciences Research
Division at Oak Ridge National Laboratory under DOE contract DE-AC05-84OR21400 with Martin
Marietta Energy Systems, Inc.
2
During 1986, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a private residence located at 393 East 3rd South Street, Monticello, Utah.
The remedial action plan required excavation of all exterior contamination. When the
excavation was completed, the property was resurveyed, including soil sampling, to ensure
the removal of all contamination, backfilled with uncontaminated material, and restored to
a condition comparable to that which existed prior to remedial action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Environmental Technology Section (ETS) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the 393 East 3rd
South Street site. This report describes the methods and results of that verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 375 yd3 of mill
tailings 6 to 24 inches deep. However, during the actual removal process, a total of 548
yd3 of contaminated earth and uranium mill tailings, 6 to 30 inches deep were removed
from a 2120 m2 area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of gamma scans with a scintillometer, a "ground-
level scan of the structure and a surface scan of the exterior and soil sampling. Samples
representative of the bottom 15-cm (6-in.) soil layers of 17 excavated areas were collected
and blended to form representative composite soil samples for each verification area. An
additional soil sample was collected from the crawlspace beneath the trailer. This result is
not included in the completion report as supportive data for interior verification.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Gamma exposure rate measurements taken by Geotech in the crawl space of the
residence ranged from 18 to 20 /iR/h. Exterior surface gamma measurements taken from
the excavated areas prior to backfilling ranged from 15 to 25 fjR/h.
SoH Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. There were 18 excavated areas for this
property, one being the excavation under the residence. Geotech's analysis of these
samples showed ^Ra concentrations from 1.4 to 8.7 pCi/g in the composite sample.
ORNL ETS obtained a percentage of these soil samples and performed a confirmatory
analysis, which showed ^Ra concentrations from 1.5 to 8.9 pCi/g. These values are below
the DOE guideline value of 15 pCi/g for soil layers >15 cm below the surface (Table 1).
Results of Geotech and ORNL soil sample analyses are given in Table 2.
Radon Measurement Results
Radon decay-product concentration (RDC) measurements for this site were
determined by the alpha-track method. To monitor radon levels, Geotech placed three
alpha-track detectors on the ground floor of the residence located on this property for a
period of approximately one year (from June 27,1989 to May 29,1990). The average
annual working level (WL) of radon progeny concentration, as determined by the
Tech./Ops-Landauer Corporation, was 0.0078, which is well below the 0.03-WL guideline
given in Table 1.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. All deficiencies discovered in the initial review have been
addressed in the letter dated September 30, 1993 from H. Perry to G. Pierce, Resubmittal
of Property Completion Reports. These items are corrected and included in the revised
completion report. It is concluded that the site successfully meets the DOE remedial
action objectives.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to ^Rn
progeny
Average annual radon proge-
ny concentration (including
background)
0.03 WL
(DOE 1990)
5
Table 2. Results of ORNL analysis of Geotech soil samples
from 393 East 3rd South Street, Monticello Utah (MS00141-MR)
^Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No.* (cm)
X2 MMU-316 >15 4.1 4.3
X3 MMU-317 >15 8.9 8.7
X4 MMU-318 >15 4.6 4.6
X5 MMU-319 >15 2.0 2.2
X6 MMU-320 >15 3.3 3.6
X7 MMU-321 >15 4.0 4.0
X8 MMU-322 >15 3.6 3.4
X9 MMU-323 >15 1.6 1.8
X10 MMU-324 >15 1.5 1.4
XI1 MMU-325 >15 1.8 1.9
X12 MMU-326 >15 3.4 3.5
X13 MMU-327 >15 2.4 2.5
X14 MMU-328 >15 4.9 5.1
X15 MMU-329 >15 5.9 6.3
X16 MMU-330 >15 4.6 4.8
X17 MMU-331 >15 3.8 3.9
X18 MMU-332 >15 4.1 4.1
" An X-type sample is a split of the sample taken by the remedial action contractor.
* Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
6
REFERENCES
Abramiuk I. N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00141-MR, Address: 393 East 3rd South Street,
Monticello, Utah 84535, Geotech, Grand Junction, Colorado, September 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1993. Environmental Technology Section Procedures Manual. ORNL
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
DOE ID NO.: MS-00141-MR
Property Address: 393 East Third South Street
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
RUST Geotech Inc. of Energy (DOE)
YES NO NOT TAKEN YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2.
In-situ [ ] Lab [X]
Interior gamma is :< 20 jjR/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21,
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Environmental Restoration
Program (Rev. 03/02/87).
[X]* [ ] [ ]
[X] [ ] [ ]
[X] [ ] [ ]
[X] [ ] [ ]
[ ] [X] [ ]
[ 1 [ 1 [X]
IX] [ 1 [ ]
IXI [ J I 1
[XI [ ] [ ]
I ] [XI [ ]
[ ] [ ] LX]
COMMENTS: *The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
SFCERTI FED SFMS-00141
DOE ID NO.: MS-00141-MR
RUST GEOTECH INC. RECOMMENDATION
Based on the RUST Geotech Inc. evaluation, I recommend this property for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
ffarry A. Perry ~ Date'
Program Manager
RUST Geotech Inc.
DOE EVALUATION
DO Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental
standards were applied per 40 CFR 192.21.
2? Environmental Restoration Program Date
Certification Official
Department of Energy
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
DOE ID NO.: MS-00157-RS
ADDRESS: 45 SOUTH SECOND EAST STREET
MONTICELLO, UTAH 84535
SEPTEMBER 1993
Prepared for
Environmental Restoration Program
Department of Energy
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
FOR
by
Program Manager
RUST Geotech Inc. has been granted authorization to conduct remedial action under
the Environmental Restoration Program. Remedial action was done in accordance
with the U.S. Environmental Protection Agency "Standards for Cleanup of Land and
Buildings Contaminated with Residual Radioactive Materials from Inactive Uranium
Processing Sites," 40 CFR 192.12, 192.20-23.
>
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.1.3 Radon Decay-Product Concentration (RDC) Measurement .... 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
i
DOE ID NO.: MS-00157-RS
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Environmental Restoration Program with the primary objective of
reducing the potential hazard to the public due to long-term exposure to
low-level radioactivity associated with the offsite mill tailings derived from
the former U.S. Atomic Energy Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to provide
additional sources of vanadium needed during World War II. Various
government agencies operated the mill until 1947. The AEC obtained the
mill in 1948 and operated it through 1959 under cost-type contracts to
provide both uranium and vanadium. Mill operations were terminated on
January 1, 1960.
The mill processed approximately one million tons of ore during the AEC
operations. Throughout the operating period, mill tailings from the
Monticello millsite were removed from the site and used for construction-
related activities in the vicinity.
1.2 Criteria for Remedial Action
The Environmental Restoration Program adopted the "Standards for
Remedial Actions at Inactive Uranium Processing Sites" (40 CFR Part 192)
for all cleanup activities under the MVP Project. These standards were
prepared by the U.S. Environmental Protection Agency (EPA) to establish
guidelines for the control of tailings piles and the cleanup of buildings and
open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the EPA
standards. The Remedial Action Contractor was notified of the inclusion
of this property into the Environmental Restoration Program and was
authorized by the DOE to conduct remedial action as required to bring the
property into conformance with the EPA standards.
1
DOE ID NO.: MS-00157-RS
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by the EPA standards (40 CFR 192.12, 192.20-23),
as indicated in the Certification Data Summary below.
Therefore, the property located at 45 South Second East Street, in
Monticello, Utah, is recommended for certification as required by the
Environmental Restoration Program guidelines, and the appropriate
records should be documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Standards
Shall not exceed 20 //R/h
above background.*
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Results
Range for the ground
floor was 14 //R/h to
15//R/h.
Annual average was
0.0186 WL.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above backgroundt in the
15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above backgroundt in any
15-cm-thick soil layer
more than 15 cm below
the surface, averaged
over 100 m2.
< 5 pCi/g above
background.
Soil sample results
ranged from 2.1 pCi/g
to 3.1 pCi/g.
*The background exposure rate is approximately 15 //R/h.
fThe background radium-226 concentration is approximately 2.0 pCi/g.
5
4
' DOE ID NO.: MS-00157-RS
Property Address: 45 South Second East Street
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
RUST Geotech Inc. of Energy (DOE)
YES NO NOT TAKEN YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
[X]* [ ] [ ] [ ] I ] [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2.
In-situ [ ] Lab [X]
[X] [ ] [ ] [ ] [ ] [ 1
Interior gamma is < 20 jjR/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21
[X] [ ] [ ]
[X] [ ] [ ]
[ ] [X] [ ]
[ ] [ ] [ 1
[ ] [ ) [ 1
[ ] [ ] [ 1
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Environmental Restoration
Program (Rev. 03/02/87).
[ 1 [ ] [X] [ ] [ ] [ 1
COMMENTS: *The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
SFCERTIFED SFMS-00I57
PROPERTY COMPLETION REPORT
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
DOE ID NO.: MS-00157-RS
ADDRESS: 45 SOUTH SECOND EAST STREET
MONTICELLO, UTAH 84535
SEPTEMBER 1993
Prepared for
Environmental Restoration Program
Department of Energy
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
FOR
FOR
by
Program Manager
RUST Geotech Inc. has been granted authorization to conduct remedial action under
the Environmental Restoration Program. Remedial action was done in accordance
with the U.S. Environmental Protection Agency "Standards for Cleanup of Land and
Buildings Contaminated with Residual Radioactive Materials from Inactive Uranium
Processing Sites," 40 CFR 192.12, 192.20-23.
1
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination ... 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.1.3 Radon Decay-Product Concentration (RDC) Measurement .... 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
DOE ID NO.: MS-00157-RS
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Environmental Restoration Program with the primary objective of
reducing the potential hazard to the public due to long-term exposure to
low-level radioactivity associated with the offsite mill tailings derived from
the former U.S. Atomic Energy Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to provide
additional sources of vanadium needed during World War II. Various
government agencies operated the mill until 1947. The AEC obtained the
mill in 1948 and operated it through 1959 under cost-type contracts to
provide both uranium and vanadium. Mill operations were terminated on
January 1, 1960.
The mill processed approximately one million tons of ore during the AEC
operations. Throughout the operating period, mill tailings from the
Monticello millsite were removed from the site and used for construction-
related activities in the vicinity.
1.2 Criteria for Remedial Action
The Environmental Restoration Program adopted the "Standards for
Remedial Actions at Inactive Uranium Processing Sites" (40 CFR Part 192)
for all cleanup activities under the MVP Project. These standards were
prepared by the U.S. Environmental Protection Agency (EPA) to establish
guidelines for the control of tailings piles and the cleanup of buildings and
open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the EPA
standards. The Remedial Action Contractor was notified of the inclusion
of this property into the Environmental Restoration Program and was
authorized by the DOE to conduct remedial action as required to bring the
property into conformance with the EPA standards.
1
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
DOE ID NO.: MS-00157-RS
MS-00157-RS
Parcel No. M-175 - A portion of Lot 3,
Block 21, City of Monticello, County of
San Juan, State of Utah
45 South Second East Street
Monticello, Utah 84535

Residential Simple (RS)
Not applicable; spillover inclusion requested
by the Remedial Action Contractor
June 26, 1987
RUST Geotech Inc.
May 2, 1988
Crowley Construction
East Route
Monticello, Utah
October 12, 1988
October 26, 1988
Interior: 0 cubic yards
Exterior: 122 cubic yards
612 square meters (m2)
September 1993
2
DOE ID NO.: MS-00157-RS
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual radioactive
material (Appendix Figure 2.1). Once excavation was complete, the
affected areas were resurveyed for possible remaining residual radioactive
material and, upon attaining satisfactory results, were backfilled with
uncontaminated material. The property was restored to a physical
condition comparable to that which existed prior to remedial action
activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified 117 cubic yards of contamination,
6 inches deep, within the property. The remedial action process included
the removal of approximately 122 cubic yards of residual radioactive
material, 6 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00157-RS
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by RUST Geotech Inc. during
November. 1987, as described in the final REA dated May 1988.
Appendix Figure 2.1 shows the extent of assessed contamination
and identifies the areas recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to backfilling.
Following the gamma scan, soil samples representative of the
6-inch-thick soil layer at the bottom of the excavation were
collected. These samples were blended to form composite
samples representing the verification areas {Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 13 microroentgens per hour (//R/h)
to 18 //R/h (Appendix Figure 2.1). The results of analyses for
radium-226 in seven composite soil samples ranged from
2.1 picocuries per gram (pCi/g) to 3.1 pCi/g (Appendix Table 3.1).
3.1.3 Radon Decay-Product Concentration (RDC) Measurement
Based on measurements representing an annual average, the
RDC was 0.0186 working level (WL), as indicated in Appendix
Table 3.2. Appendix Figure 2.1 shows the measurement location
on the ground floor (the lowest habitable level of the structure).
4
DOE ID NO.: MS-00157-RS
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by the EPA standards (40 CFR 192.12, 192.20-23),
as indicated in the Certification Data Summary below.
Therefore, the property located at 45 South Second East Street, in
Monticello, Utah, is recommended for certification as required by the
Environmental Restoration Program guidelines, and the appropriate
records should be documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Standards
Shall not exceed 20 //R/h
above background.*
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Results
Range for the ground
floor was 14 //R/h to
15 //R/h.
Annual average was
0.0186 WL.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background1 in the
15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above backgroundt in any
15-cm-thick soil layer
more than 15 cm below
the surface, averaged
over 100 m2.
< 5 pCi/g above
background.
Soil sample results
ranged from 2.1 pCi/g
to 3.1 pCi/g.
*The background exposure rate is approximately 15 //R/h.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00157-RS
4.0 APPENDIX
Appendix Tables:
Table 3.1 Post-Excavation Sample/Measurement Results
Table 3.2 Radon Decay-Product Concentration
Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
MM-JEK:08-19-93
MS-00157.RS WP51
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00157-RS
Address: 45 South Second East Street, Monticello, Utah
The analytical uncertainties in the table are reported at the 95-percent confidence
interval.
Exposure- Soil
Rate Range Sample Meas. Radium-226 Potassium Thorium
Area (//R/h) Ticket No. Method* (pCi/g) (pCi/g) (pCi/g)
V-l
V-2
V-3
V-4
V-5
V-6
V-7
14
14
14
14
14
14
14
18
18
18
18
18
17
18
MNK 277
MNK 278
MNK 279
MNK 280
MNK 281
MNK 282
MNK 283
AL
AL
AL
AL
AL
AL
AL
3.1
2.7
2.4
2.5
2.9
2.3
2.1
0.5
0.4
0.4
17.1
18.8
19.1
18.4
18.4
19.1
18.7
3.4
3.6
3.6
3.6
3.6
3.6
3.7
1.1 ± 0.3
0.8 ± 0.2
±
±
0.9 ± 0.3
1.3 ± 0.3
1.1 ± 0.3
1.3
0.8
0.3
0.2
See Appendix Figure 2.1 for the verification areas.
*AL = Analytical Laboratory
7
Table 3.2
Radon Decay-Product Concentration Measurement Results
DOE ID No.: MS-00157-RS
Address: 45 South Second East Street, Monticello, Utah
Instrument Type: Terradex Track Etch® Detector
Radon
Detector Tracks Per Concentration Working
Number Start Date End Date mm2 (pCi/L) Level
526451 02-09-89 01-19-90
526107 02-09-89 01-19-90
526474 02-09-89 01-19-90
27.8 3.88 0.0194
24.4 3.41 0.0171
27.5 3.84 0.0192
Annual Average: 0.0186
See Appendix Figure 2.1 for the measurement location.
8
10
30
1 2 1 4 1 6 18 20 22 24 26 28 30 32 34 36 38 40
28
26
N
N
24
22
20
LJ
UJ
LY.
I—
CO
r—
CO <
LU
o o
LU
CO
ZD
o
CO
N
18
N
1 6
1 4
12
Y
10
14-15
D
El •'.'.QY.'H o 14-15 Q
V-1 V-5
14-18 14-18
ONE STORY
BRICK HOUSE
14-15
r
V-2
(RDC) 4-18
® • 6
I \ £E2
STORAGE SHED
I 13-14 v-6
4-7
14-15 14-15 V-4
14-18
V-3
•a
a
14-18
£7
V-7
14-18 SCALE IN FEET
0 20
09/20/93 TMT/529
40 20 10
RM00157V NORTH
I
0
<D
r- ~i
I I
12-15
1 2
v-1
16-17
(RDC)
LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN //R/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE
POST-REMEDIAL ACTION RADON DECAY-PRODUCT
CONCENTRATION MEASUREMENT LOCATION
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
THIS DRAWING, PREPARED FOR THE ENVIRONMENTAL RESTORATION
PROGRAM, IS FOR THE SOLE USE OF THE U.S. DEPARTMENT OF
ENERGY AND ITS CONTRACTORS. IT IS NOT A LAND SURVEY PLAT,
UTILITY LOCATION PLAT, OR OTHER IMPROVEMENT SURVEY PLAT
AND IS NOT TO BE RELIED UPON FOR THE ESTABLISHMENT OF
FENCE, BUILDING, OR OTHER FUTURE IMPROVEMENT LINES.
RADIOLOGICAL AS-BUILT
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
RESIDENCE-NO. Of OCCUPANTS
NON—RE5IOENCE—MAN—HRS./WK.
INSTRUMENT NO.
SURVEY OATE
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE, COLORADO
TT tn
45 SOUTH SECOND
EAST STREET
MONTICELLO, UTAH
GEOTECH INC
OATE APPROVAL DOC
OOE io NO. MS-001 57-RS
DWC.NO. 3-B00157-V1 SHT1
-SL.
1 0 1 9 1 4 1 R 1 R 9D 99 OA OF, 99 7n A n
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
45 SOUTH 2ND EAST STREET
MONTICELLO, UTAH (MS00157-RS)
A.R. Jones
November 1993
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION , 3
Gamma Measurements 3
Soil Sample Analysis 3
Radon Measurement Results 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from 45 South 2nd East Street,
Monticello, Utah (MS00157-RS) 5
v
ACKNOWLEDGMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge G. A. Pierce for analysis of soil samples and G. K. Stowe and M. K.
Jensen for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1988, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at 45
South 2nd East Street, Monticello, Utah. The Environmental Technology Section
(ETS) of Oak Ridge National Laboratory was assigned the responsibility of
verifying the data supporting the adequacy of remedial action and confirming the
site's compliance with DOE guidelines. The ETS found that the site successfully
meets the DOE remedial action objectives. All deficiencies noted in the earlier
review have been corrected in the revised completion report. Procedures used by
the ETS are described in the Environmental Technology Section Procedures
Manual (ORNL, 1993).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT 45 SOUTH 2ND EAST STREET
MONTICELLO, UTAH (MS00157-RS)*
JUNTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War II. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Cbmmission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Environmental
Assessment Group in the Environmental Technology Section of the Health Sciences Research
Division at Oak Ridge National Laboratory under DOE contract DE-AC05-84OR21400 with Martin
Marietta Energy Systems, Inc.
2
During 1988, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a private residence located at 45 South 2nd East Street, Monticello, Utah.
The remedial action plan required excavation of all exterior contamination. When the
excavation was completed, the property was resurveyed, including soil sampling, to ensure
the removal of all contamination, backfilled with uncontaminated material, and restored to
a condition comparable to that which existed prior to remedial action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Environmental Technology Section (ETS) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the 45 South 2nd
East Street site. This report describes the methods and results of that verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 117 yd3 of mill
tailings 6 inches deep. However, during the actual removal process, a total of 122 yd3 of
contaminated earth and uranium mill tailings, 6 inches deep were removed from a 612 m2
area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of gamma scans with a scintillometer, ground-level
and basement scans of the building and a surface scan of the exterior and soil sampling.
Samples representative of the bottom 15-cm (6-in.) soil layers of 7 excavated areas were
collected and blended to form representative composite soil samples for each verification
area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Gamma exposure rate measurements taken by Geotech at the ground-level of the
residence ranged from 14 to 15 /zR/h. Exterior surface gamma measurements taken from
the excavated areas prior to backfilling ranged from 13 to 18 /iR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. There were 7 excavated areas for this
property. Geotech's analysis of these samples showed ^Ra concentrations from 2.1 to 3.1
pCi/g in the composite sample. ORNL ETS obtained a percentage of these soil samples
and performed a confirmatory analysis, which showed ^Ra concentrations from 1.6 to 2.7
pCi/g. These values are below the DOE guideline value of 15 pCi/g for soil layers >15
cm below the surface (Table 1). Results of Geotech and ORNL soil sample analyses are
given in Table 2.
Radon Measurement Results
Radon decay-product concentration (RDC) measurements for this site were
determined by the alpha-track method. To monitor radon levels, Geotech placed three
Alpha-track detectors on the ground floor of the residence located on this property for a
period of approximately one year (from February 9, 1989 to January 19, 1990). The
average annual working level (WL) of radon progeny concentration, as determined by the
Tech./Ops-Landauer Corporation, was 0.019, which is below the 0.03-WL guideline given
in Table 1.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. All deficiencies noted in an earlier review have been
identified by the RAC and resolved as provided in the letter dated September 30, 1993
from H. Perry to G. Pierce, Resubmittal of Property Completion Reports, and these have
been corrected in the completion report. It is concluded that the site successfully meets
the DOE remedial action objectives.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to 222Rn
progeny
Average annual radon proge-
ny concentration (including
background)
0.03 WL
(DOE 1990)
5
Table 2, Results of ORNL analysis of Geotech soil samples
from 45 South 2nd East Street, Monticello Utah (MS00157-RS)
^Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No.* (cm)
XI MNK-277 >15 2.1 3.1
X2 MNK-278 >15 2.1 2.7
X3 MNK-279 >15 1.6 2.4
X4 MNK-280 >15 2.7 2.5
X5 MNK-281 >15 2.4 2.9
X6 MNK-282 >15 2.2 2.3
X7 MNK-283 >15 1.6 2.1
" An X-type sample is a split of the sample taken by the remedial action contractor.
b Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
REFERENCES
Abramiuk I. N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00157-RS, Address: 45 South 2nd East Street,
Monticello, Utah 84535, Geotech, Grand Junction, Colorado, September 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1993. Environmental Technology Section Procedures Manual. ORNL
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
DOE ID NO.: MS-00157-RS
Property Address: 45 South Second East Street
[X]* [ ] [ ]
[X] [ ] [ ]
[X] [ ] [ ]
[X] [ ] [ ]
[ ] [X] [ ]
[ ] [ ] [X]
LX] [ ] [ 1
[/] [ ] [ ]
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
RUST Geotech Inc. of Energy (DOE)
YES NO NOT TAKEN YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2.
In-situ [ ] Lab [X]
Interior gamma is < 20 //R/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21.
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Environmental Restoration
Program (Rev. 03/02/87).
[/] [ ] [ ]
P<] [ ] [ ]
[][)<] [ ]
[ ] [ 1 pa
COMMENTS: *The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
SFCERTI FED SFMS-eei57
DOE ID NO.: MS-00157-RS
RUST GEOTECH INC. RECOMMENDATION
Based on the RUST Geotech Inc. evaluation, I recommend this property for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
larry A. Retry Date
Program Manager
RUST Geotech Inc.
DOE EVALUATION
[X] Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental
standards were applied per 40 CFR 192.21.
ErtVironmemal Restoration Program
Certification Official
Department of Energy
7 JJ ?r*
Date
PROPERTY COMPLEXION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00167-MR
ADDRESS: 564 EAST CEMETERY ROAD
MONTICELLO, UTAH 84535
MARCH 1993
Prepared for
Decontamination and Decommissioning Program
Division of Facilities and Site Decommissioning
Department of Energy
by
Chem-Nuclear Geotech, Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
Harry/A. Perry
Program Manager
Chem-Nuclear Geotech, Inc., has been granted authorization to conduct remedial
action under the Decontamination and Decommissioning Program. Remedial action
was done in accordance with the Environmental Protection Agency Standards for
Cleanup of Lands and Buildings Contaminated with Residual Radioactive Material
from Inactive Uranium Processing Sites, 40 CFR 192.12, 192.20-23.
TABLE OF CONTENTS
Section Paoe
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action .' 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.1.3 Radon Decay-Product Concentration (RDC) Measurement ... 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
DOE ID NO.: MS-00167-MR
1.0 SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) project was accepted into
the Decontamination and Decommissioning Program with the primary
objective of reducing the potential hazard to the public due to
long-term exposure to low-level radioactivity associated with the
offsite mill tailings derived from the former U.S. Atomic Energy
Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to
provide additional sources of vanadium needed during World War II.
Various government agencies operated the mill until 1947. The AEC
obtained the mill in 1948 and operated it through 1959 under
cost-type contracts to provide both uranium and vanadium. Mill
operations were terminated on January 1, 1960.
The mill processed approximately one million tons of ore during the
AEC operations. Throughout the operating period, mill tailings from
the Monticello millsite were removed from the site and used for
construction-related activities in the vicinity.
1.2 Criteria for Remedial Action
The Decontamination and Decommissioning Program has adopted the
"Standards for Remedial Action at Inactive Uranium Processing Sites"
(40 CFR Part 192) for all cleanup activities under the MVP project.
These standards were prepared by the U.S. Environmental Protection
Agency (EPA) to establish guidelines for the control of tailings
piles and the cleanup of buildings and open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding
the EPA standards. The Remedial Action Contractor was notified of
the inclusion of this property into the Decontamination and
Decommissioning Program and was authorized by the DOE to conduct
remedial action as required to bring the property into conformance
with the EPA standards.
1
DOE ID NO.: MS-00167-MR
Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owners:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
MS-00167-MR
Parcel No. M-597-1, City of Monticello,
County of San Juan, State of Utah
564 East Cemetery Road
Monticello, Utah 84535

Major Residential (MR)
Not applicable; spillover inclusion
requested by the Remedial Action
Contractor
June 26, 1987
Chem-Nuclear Geotech, Inc.
January 6, 1988
Sonderegger Construction, Inc.
P.O. Box 6
Monticello, Utah
September 17, 1988
September 17, 1991
Interior: 0 cubic yards
Exterior: 430 cubic yards
2,070 square meters (m2)
March 1993
DOE ID NO.: MS-00167-MR
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual
radioactive material (Appendix Figure 2.1). Interior assessed
Area B (soil in the crawl space of the trailer house) was excluded
from remedial action based on gamma exposure rates and pre-remedial
radon decay-product concentration (RDC) measurements that did not
exceed the EPA standards, as discussed in the REA. Once excavation
was complete, the affected areas were resurveyed for possible
remaining residual radioactive material and, upon attaining
satisfactory results, were backfilled with uncontaminated material.
The property was restored to a condition comparable to that which
existed prior to remedial action activities.
2.2 Previously Unidentified Contamination
The radiological assessment (excluding assessed Area B) identified
511 cubic yards of contamination, 6 inches deep, within the
property. The remedial action process included the removal of
approximately 430 cubic yards of residual radioactive material,
ranging from 6 inches to 12 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00167-MR
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by Chem-Nuclear
Geotech, Inc., during July 1987, as described in the final
REA dated January 1988. Appendix Figure 2.1 shows the extent
of assessed contamination and identifies the areas
recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted
after the removal of residual radioactive material and prior
to backfilling. Following the gamma scan, soil samples
representative of the 6-inch-thick soil layer at the bottom
of the excavation were collected. These samples were blended
to form composite samples representing the verification areas
(Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined
during the gamma scan, ranged from 12 microroentgens per
hour (/jR/h) to 26 uR/h (Appendix Figure 2.1). The results of
analyses for radium-226 in 25 composite soil samples ranged
from 2.3 picocuries per gram (pCi/g) to 9.9 pCi/g (Appendix
Table 3.1).
3.1.3 Radon Decay-Product Concentration (RDC) Measurement
Based on measurements representing an annual average, the
RDC was 0.0091 working level (WL), as indicated in Appendix
Table 3.2. Appendix Figure 2.1 shows the measurement
location on the ground floor (the lowest habitable level of
the structure).
4
DOE ID NO.: MS-00167-MR
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property
to the extent required by the EPA standards (40 CFR 192.12,
192.20-23), as indicated in the Certification Data Summary below.
Therefore, the property located at 564 East Cemetery Road, in
Monticello, Utah, is recommended for certification as required by
the Decontamination and Decommissioning Program guidelines, and the
appropriate records should be documented.
Applicability
Certification Data Summary
Standards Survey Results
Habitable Structures
Exposure Rate: Shall not exceed 20 uR/h
above background.*
Range for the ground
floor was 17 uR/h to
18 fiR/h.
Radon Decay-Product
Concentrat ion:
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Annual average was
0.0091 WL.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background** in
the 15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above background** in any
15-cm-thick soil layer
more than 15 cm below the
surface, averaged over
100 m*.
< 5 pCi/g above
background.
Soil sample results
ranged from 2.3 pCi/g
to 9.9 pCi/g.
*The background exposure rate is approximately 16 ^R/h.
**The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00167-MR
4.0 APPENDIX
Appendix Tables:
Table 3.1 Post-Excavation Sample/Measurement Results
Table 3.2 Radon Decay-Product Concentration (RDC)
Measurement Results
Appendix Figure:
Figure 2.1 Interior and Exterior Extent of Contamination -
RADIOLOGICAL AS-BUILT
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00167-MR
Address: 564 East Cemetery Road, Monticello, Utah
The analytical uncertainties in the table are reported at the 95-percent
confidence interval. A less-than sign (<) indicates that the minimum detection
limit based on Compton background was reached.
Area
Exposure-
Rate Range
(/iR/h)
Soil
Sample
Ticket No.
Meas.
Method*
Radium-226
(pCi/g)
Potassium
(pCi/g)
Thorium
(pCi/g)
V-l
V-2
V-3
V-4
V-5
V-6
V-7
V-8
V-9
V-10
V-ll
V-12
V-13
V-14
V-15
V-16
V-17
V-18
V-19
V-20
V-21
V-22
15
16
16
14
14
16
15
16
14
15
16
15
16
16
16
15
14
15
16
15
15
15
22
20
20
18
18
18
18
20
17
19
20
18
19
20
19
20
18
20
20
22
26
22
MNM 701
MNM 702
MNM 703
MNM 704
MNM 705
MNM 706
MNM 707
MNM 708
MNM 709
MNM 710
MNM 711
MNM 712
MNM 713
MNM 714
MNM 715
MNM 716
MNM 717
MNM 718
MNM 719
MNM 720
MNM 721
MNM 723
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
7.9
8.2
2.7
2.8
2.8
2.9
3.0
2.3
7.4
4.9
6.8
4.7
6.7
4.7
8.4
9.9
5.7
8.0
2
2
5
5
5
0.5
0.5
1.0
0.4
0.5
0.6
0.4
1.1
0.8
1.0
0.7
1.0
0.7
1.3/^>
1.5^
0.9
1.2
16.0
15.0
14.7
14.5
17.9
14.5
17.3
17.5
12.5
15.5
18.1
18.5
17.9
18.4
15.0
15.7
15.3
16.1
15.3
14.9
13.6
16.3
2.9
2.7
2.7
2.6
3.1
2.7
3.1
3.1
3.5
3.9
4.2
4.2
4.1
4.3
3.9
3.9
3.9
3.9
3.9
3.8
3.8
4.1
1.0
0.8
0.8
1.2
0.9
0.7
1.0
0.9
1.4
0.2
0.3
0.2
1.3
1.2
0.2
1.2
1.1
1.0
1.1
0.3
1.3
0.3
0.3
0.2
0.2
0.3
0.2
0.2
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
± 0.3
*AL = Analytical Laboratory
7
Table 3.1
Post-Excavation Sample/Measurement Results (continued)
DOE ID No.: MS-00167-MR
Address: 564 East Cemetery Road, Monticello, Utah
Exposure- Soil
Rate Range Sample Meas. Radium-226 Potassium Thorium
Area (pR/h) Ticket No. Method* (pCi/g) (pCi/g) (PCi/g)
V
V-23 17 - 21 MNM 724 AL 8.9 ± 1.4 15.9 ± 4.1 < 0.3
V-24 16 - 22 MNM 725 AL 5.9 ± 0.9 16.0 ± 4.0 0.8 ± 0.3;
V-25 14 - 19 MNP 236 AL 5.0 ± 0.8 15.2 ± 4.0 < 0.3
See Appendix Figure 2.1 for the verification areas.
*AL = Analytical Laboratory
8
Table 3.2
Radon Decay-Product Concentration (RDC) Measurement Results
DOE ID No.: MS-00167-MR
Address: 564 East Cemetery Road, Monticello, Utah
Instrument Type: Terradex Radtrak* Detector
Detector
Number Start Date End Date
Tracks Per
mm2
Radon
Concentrat ion
(pCi/1)
Average
Working
Level (WL)
3315589
3315559
3315816
09-04-91
09-04-91
09-04-91
10-04-92
10-04-92
10-04-92
19.6
20.5
17.6
1.86
1.94
1.66
0.0093
0.0097
0.0083
Annual Average: 0.0091
See Appendix Figure 2.1 for the measurement location.
MM-VPF:01-15-93
MS-00167.MR WS
REV052592
9
10
42 r~
12
10
14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44
CEMETERY ROAD
46 48
V-25 V-5 V-10
16-18 14-1« 14-18 15-1* 14-17 u-i«
t : : : :
B B® 1 B B «©B «
i i
V-7 V-3 V-12 V-B
m is-ie 15-18
i I I
@B B
M -i
(EH
a a
V-2 17 B SEE DETAIL it-it 15-22
SHED
V-25
V-17 v-ie 14-H
15-20 14-18 14-18
B V-1S V-1
5-22 16-1S
B <3B
V-23
>_ J16-20 I B 17-21 15-19
V-20
ED 15-22
E
> V-22
• B 15-22
ill! V-21 •-24
15-2$ 16-22
:::=>> 5-19 15-19
-19
SCALE IN FEET
12 14
?0 10 0 20 f.O
20 18 16
-15-19
NORTH
22 24 26
NOT;
28 30
•1V.YJ-"
12-15
12
29-
TRAILER HOUSE
AIL
DETAIL A
CRAWL SPACE
LEGFND
ED
AVERAGE
AREA1 OF f
POSTj-F
AREA DENTIFIER
ASSESSED
RATEsVluR/h
DEPTH OF ASSESSED CON~AMINATION
REMEDIAL
AND CA
CONTAMINATION
ACTIO!
!0F EXCAVAT ON •
TEp..DEPTH.FO.RTHE.^PQS^IT.QF
RANGE
v-i SOIL SAMPLE AREA II
TION:EXPCSURE-RATE 18-17
EXPOSURE -RATE
IDENTIFIER
.AI
'LD|^,ON
RODUCT
RADIOLOGTCAL'AS^B
FIGURE 2.1
RANGE
.TIME
ACTION
50
111
INTERIOR AND EXTERIOR EXTENT OF CONTAMINATION
"•I" l»-l-l»"«
rMr\i.n\ 564 EAST CEMETERY ROAD
MONTICELLO. UTAH
1
32 34 36 38 40
»3-cooit7-vt^TTT
42 44 46 48 50
DOE ID NO.: MS- OG>lk7 • rWTL,
Property Address: Ef\<TT CFmgTg?j *ftaME>
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
Chem-Nuclear Geotech. Inc.
YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 ma. [X]* [ ] [ ]
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2. [X] [ ] [ ]
In-situ [ ] Lab [X]
Interior gamma is < 20 f/R/h
above background in any
occupied or habitable
structure. [XI [ ] [ J
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level. [X] [ ] [ ]
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21. [ ] tx] [ )
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Decontamination and
Decommissioning [ ] [ ] [>c]
Program (Rev. 03/02/87).
U.S. Department
of Energy (DOB)
YES NO NOT TAKEN
1*1
[ ]
[ ]
[ 1
[ ]
[ ]
f/1
t/3
[ 1
[ 1
[ )
[ 1
[ ]
COMMENTS: *The excavations were backfilled with materials that were measured
at the source showing that the Ra-226 concentrations are in the range of
normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
Hill
SFCERT1 FED lilllill
SFMS-00167
DOE ID NO. : MS- QQ \ (ol' ^ ^-
CHEM-NUCLEAR GEOTECH, INC., RECOMMENDATION
Based on the Chem-Nuclear Geotech, Inc., evaluation, I recommend this property
for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
Per rry Date
:amination and Decommissioning Program Manager
Chem-Nuclear Geotech, Inc.
DOE EVALUATION
Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental standards
were applied per 40 CFR 192.21.
Decontamination and1 Decommission/ng^rogram
Certification Official ^
Department of Energy
Date
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS. INC.
GRAND JUNCTION OFFICE
P. 0. BOX 2567
GRAND JUNCTION. COLORADO 81502
JUN 2 31993
Donald N. Leske
U.S. Department of Energy
Grand Junction Office
2597 B 3/4 Road
P.O. Box 2567
Grand Junction, CO 81502
Dear Mr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil, indoor radon daughter
concentration, and indoor gamma exposure rate at this property.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
-vit_AeJL
Gretchen A. Pierce
Pollutant Assessments Group
Location Number: MS00167
Location Address: 564 East Cemetery Road
Monticello. Utah 84535
Property Owner:

Attachments
HEALTH AND SAFETY RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
564 EAST CEMETERY ROAD
MONTICELLO, UTAH (MS00167)
S.K. Mather
June 1993
Work performed by the
POLLUTANT ASSESSMENTS GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
Radon Measurement Results 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from 564 East Cemetery Road,
Monticello, Utah (MS00167) 5
v
ACKNOWLEDGMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge M. K. Jensen for analysis of soil samples and A.R. Jones and G.K. Stowe for
technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1988, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at 564
East Cemetery Road, Monticello, Utah. The Pollutant Assessments Group (PAG)
of Oak Ridge National Laboratory was assigned the responsibility of verifying the
data supporting the adequacy of remedial action and confirming the site's
compliance with DOE guidelines. The PAG found that the site successfully meets
the DOE remedial action objectives. Procedures used by the PAG are described
in the Pollutant Assessments Group Procedures Manual (ORNL, 1992).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT 564 EAST CEMETERY ROAD
MONTICELLO, UTAH (MS00167)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War II. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Pollutant Assessments
Group of the Health and Safety Research Division at Oak Ridge National Laboratory under DOE
contract DE-AC05-84OR21400 with Martin Marietta Energy Systems, Inc.
2
During 1988, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a private residence located at 564 East Cemetery Road, Monticello, Utah.
The remedial action plan required excavation of all exterior contamination. When the
excavation was completed, the property was resurveyed, including soil sampling, to ensure
the removal of all contamination, backfilled with uncontaminated material, and restored to
a condition comparable to that which existed prior to remedial action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Pollutant Assessments Group (PAG) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the 564 East
Cemetery Road site. This report describes the methods and results of that verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identifiedpll -yd3 of mill
tailings 6 inches deep. During the actual removal process, a total of430'w of
contaminated earth and uranium mill tailings, 6 to 12 inches deep were~Temoved from a
2070 m2 area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of gamma scans with a scintillometer, ground-level
scans of the building and a surface scan of the exterior and soil sampling. Samples
representative of the bottom 15-cm (6-in.) soil layers of 25 excavated areas were collected
and blended to form representative composite soil samples for each verification area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Gamma exposure rate measurements , taken by Geotech at the ground-level of the
residence ranged from 17 to 18 /iR/h. Exterior surface gamma measurements taken from
the excavated areas prior to backfilling ranged from 12 to 26 /iR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. There were 25 excavated areas for this
property. Geotech's analysis of these samples showed ^Ra concentrations from 2.3 to 9.9
pCi/g in the composite sample. ORNL PAG obtained a percentage of these soil samples
and performed a confirmatory analysis, which showed ^Ra concentrations from 5.0 to 8.9
pCi/g. These values are below the DOE guideline value of 15 pCi/g for soil layers >15
cm below the surface (Table 1). Results of Geotech and ORNL soil sample analyses are
given in Table 2.
Radon Measurement Results
Radon decay-product concentration (RDC) measurements for this site were
determined by the alpha-track method. To monitor radon levels, Geotech placed three
Alpha-track detectors on the ground floor of the residence located on this property for a
period of approximately one year (from September 4, 1991 to October 4, 1992). The
average annual working level (WL) of radon progeny concentration, as determined by the
TechVOps-Landauer Corporation, was 0.0091, which is well below the 0.03-WL guideline
given in Table 1.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Exposure to 222Rn
progeny
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
Average annual radon proge-
ny concentration (including
background)
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
.03 WlA
(DOE 1990)
5
Table 2. Results of ORNL analysis of Geotech soil samples
from 564 East Cemetery Road, Monticello Utah (MS00167)
^Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No* (cm)
X2 MNM-702 15-30 /^7A\ /S2\
X8 MNM-708 15-30 / 5.0 \ 6.7 \
X13 MNM-713 15-30 (6.0 / 7.4
X15 MNM-715 15-30 6.2 / / 6.8
X20 MNM-720 15-30 \ 8.9 / 9.9 ,
X23 MNM-724 15-30 V LiL2^
" An X-type sample is a split of the sample taken by the remedial action contractor.
b Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
6
REFERENCES
Abramiuk I. N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00167, Address: 564 East Cemetery Road, Monticello,
Utah 84535, Geotech, Grand Junction, Colorado, March 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1992. Pollutant Assessments Group Procedures Manual ORNL/TM-
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
DOE ID NO.: MS-00167-MR
Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owners:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
MS-00167-MR
Parcel No. M-597-1, City of Monticello,
County of San Juan, State of Utah
564 East Cemetery Road
Monticello, Utah 84535

Major Residential (MR)
Not applicable; spillover inclusion
requested by the Remedial Action
Contractor
June 26, 1987
Chem-Nuclear Geotech, Inc.
January 6, 1988
Sonderegger Construction, Inc.
P.O. Box 6
Monticello, Utah
September 17, 1988
September 17, 1991
Interior: 0 cubic yards
Exterior: 430 cubic yards
2,070 square meters (m2)
March 1993
DOE ID NO.: MS-00167-MR
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property
to the extent required by the EPA standards (40 CFR 192.12,
192.20-23), as indicated in the Certification Data Summary below.
Therefore, the property located at 564 East Cemetery Road, in
Monticello, Utah, is recommended for certification as required by
the Decontamination and Decommissioning Program guidelines, and the
appropriate records should be documented.
Applicability
Certification Data Summary
Standards Survey Results
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentrat ion:
Shall not exceed 20 /iR/h
above background.*
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Range for the ground
floor was 17 juR/h to
18 /iR/h.
Annual average was
0.0091 WL.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background** in
the 15-cm surface layer,
averaged over 100 m3.
Shall not exceed 15 pCi/g
above background** in any
15-cm-thick soil layer
more than 15 cm below the
surface, averaged over
100 m*.
< 5 pCi/g above
background.
1/
Soil sample results
ranged from 2.3 pCi/g
to 9.9 pCi/g.
*The background exposure rate is approximately 16 pR/
**The background radium-226 concentration is approximately 2.0 pCi/g.
5
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00184-VL
ADDRESS: PARCEL NO. A33230367816
SOUTH MAIN STREET
MONTICELLO, UTAH 84535
JULY 1993
Prepared for
Decontamination and Decommissioning Program
Division of Facilities and Site Decommissioning
Department of Energy
by
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
H^fry A. Perry
Program Manager
RUST Geotech Inc. has been granted authorization to conduct remedial action under
the Decontamination and Decommissioning Program. Remedial action was done in
accordance with the U.S. Environmental Protection Agency "Standards for Cleanup of
Land and Buildings Contaminated with Residual Radioactive Materials from Inactive
Uranium Processing Sites," 40 CFR 192.12, 192.20-23.
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
DOE ID NO.: MS-00184-VL
1.0 SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Decontamination and Decommissioning Program with the primary
objective of reducing the potential hazard to the public due to long-term
exposure to low-level radioactivity associated with the offsite mill tailings
derived from the former U.S. Atomic Energy Commission (AEC) uranium
mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to provide
additional sources of vanadium needed during World War II. Various
government agencies operated the mill until 1947. The AEC obtained the
mill in 1948 and operated it through 1959 under cost-type contracts to
provide both uranium and vanadium. Mill operations were terminated on
January 1, 1960.
The mill processed approximately one million tons of ore during the AEC
operations. Throughout the operating period, mill tailings from the
Monticello millsite were removed from the site and used for construction-
related activities in the vicinity.
1.2 Criteria for Remedial Action
The Decontamination and Decommissioning Program adopted the
"Standards for Remedial Actions at Inactive Uranium Processing Sites"
(40 CFR Part 192) for all cleanup activities under the MVP Project.
These standards were prepared by the U.S. Environmental Protection
Agency (EPA) to establish guidelines for the control of tailings piles and
the cleanup of buildings and open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Inclusion Survey Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the EPA
standards. The Remedial Action Contractor was notified of the inclusion
of this property into the Decontamination and Decommissioning Program
and was authorized by the DOE to conduct remedial action as required to
bring the property into conformance with the EPA standards.
1
DOE ID NO.: MS-00184-VL
.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owners:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
MS-00184-VL
Parcel No. A33230367816, Section Sf,
T33S., R24E, Salt Lake Base Meridian, City
of Monticello, County of San Juan, State of
Utah #>3£
Parcel No. A33230367816
South Main Street
Monticello, Utah 84535

Vacant Lot (VL)
Oak Ridge National Laboratory
October 23, 1989
RUST Geotech Inc.
October 10, 1990
Crowley Construction
East Route
Monticello, Utah
July 28, 1992
September 25, 1992
Interior: 0 cubic yards
Exterior: 2,394 cubic yards
1,476 square meters (m2)
July 1993
DOE ID NO.: MS-00184-VL
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual radioactive
material (Appendix Figure 2.1). Once excavation was complete, the
affected areas were resurveyed for possible remaining residual radioactive
material and, upon attaining satisfactory results, were backfilled with
uncontaminated material. The property was restored to a physical
condition comparable to that which existed prior to remedial action
activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified 1,595 cubic yards of contamination,
ranging from 6 inches to 120 inches deep, within the property. The
remedial action process included the removal of approximately
2,394 cubic yards of residual radioactive material, ranging from 12 inches
to 204 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00184-VL
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by RUST Geotech Inc. during
October 1989, as described in the final REA dated October 1990.
Appendix Figure 2.1 shows the extent of assessed contamination
and identifies the areas recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to backfilling.
Following the gamma scan, soil samples representative of the
6-inch-thick soil layer at the bottom of the excavation were
collected. These samples were blended to form composite
samples representing the verification areas (Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 13 microroentgens per hour O^R/h)
to 59 //R/h (Appendix Figure 2.1). Elevated exposure rates in
Areas V-7, V-8, and V-13 were associated with the property
adjoining the northeast and northwest inclusion boundary. The
results of analyses for radium-226 in 18 composite soil samples
ranged from less than 1.0 picocurie per gram (pCi/g) to 3.6 pCi/g
(Appendix Table 3.1). The composite samples representing Areas
V-12 and V-13 included soil samples taken from MS-00051-CS
(Areas V-12 and V-13).
4
DOE ID NO.: MS-00184-VL
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by the EPA standards (40 CFR 192.12, 192.20-23),
as indicated in the Certification Data Summary below.
Therefore, the property located at Parcel No. A33230367816, South
Main Street, in Monticello, Utah, is recommended for certification as
required by the Decontamination and Decommissioning Program
guidelines, and the appropriate records should be documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Standards
Shall not exceed 20 //R/h
above background.
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Results
Not applicable:
vacant lot.
Not applicable:
vacant lot.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background* in the
15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below
the surface, averaged
over 100 m2.
< 5 pCi/g above
background.
Soil sample results
ranged from < 1.0 pCi/g
to 3.6 pCi/g.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00184-VL
4.0 APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
MM-KMA:06-21-93
MS-00184.VL WP51
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00184-VL
Address: Parcel No. A33230367816, South Main Street, Monticello, Utah
A less-than sign (<) indicates that the minimum detection limit based on Compton
background was reached.
Area
Exposure-Rate
Range (//R/h)
Soil Sample
Ticket No.
Meas.
Method*
Radium-226
(pCi/g)
V-l
V-2
V-3
V-4
V-5
V-6
V-7
V-8
V-9
V-10
V-ll
V-12t
V-131
V-14
V-15
V-16
V-17
V-18
13 - 18
14 - 21
13 - 19
15 - 19
13 - 16
13 - 19
16
15
13
15
15
15
14
15
13
14
15
15
51
51
17
18
18
18
59
18
17
16
19
19
NAU 067
NAS 761
NAS 762
NAS 763
NAS 764
NAS 765
NAS 766
NAS 767
NAN 803
NAN 804
NAN 805
NAN 806
NAS 778
NAS 779
NAS 780
NAS 781
NAS 782
NAS 783
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
1.1
2.8
1.2
1.0
1.0
2.1
2.2
2.7
1.6
2.7
2.1
2.5
2.5
3.5
2.7
2.0
3.6
2.1
See Appendix Figure 2.1 for the verification areas.
OCS = Opposed Crystal System
The composite samples included soil samples taken from MS-00051-CS.
7
44
42
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
SCALE IN FEET
16
14-16
V-S
13-U
z
V-i
ll-l»
1 i
y\ \
204
V-i
13-17
V-C
1J-1S
XHI6»12
©
<D
12-15
v-i
14-15
1ESEMD.
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN ^R/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
POST—REMEDIAL ACTION EXPOSURE—RATE RANGE
BOUNDARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANCE
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
2
THIS DRAWINC. PREPARE© FOR THC OECOHTAUINATION ANB
OECOMMISSIONINC PROCRAM. IS TO* THC SOU USC OF THC
U S OEPARTMCNT OT ENERGY ANO ITS CONTRACTORS. IT IS
MOT A LANO SURVEY FLAT. UTIUTY LOCATION PLAT. OR OTHCR
IMPROVEMENT SURVEY RLAT AND IS NOT TO SC RELtEO URON
TOR THC CSTARUSHUCNT OF FENCE, SUILOINe. OR OTHCR
FUTURE IMPROVEMENT LINES.
RADIOLOGICAL AS-BUILT
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
RCUOCNCi-HO. OF OCCUPANTS
NON.RtilDtNCC-MAN.HRS.'WR.
INSTRUMENT WO. tURVCVM
VERIFICATION
• V CK. A.C APR. NO. OATI OT CK. AC. APP.
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJICTI OFFICE. COLORADO
2/ii.
PARCEL A3323-036-781C
SOUTH MAIN STREET
MONTICELLO. UTAH
DATS 'AFPROVAL OOC
18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64
Gawrew INC
66
MS-00104-VL
o»o. NO. 1-D00104-V1
68 70 72 7'
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs •
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
A33230367815, South Main Street
MONTICELLO, UTAH (MS00184)
A.R. Jones
January 1994
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from A33230367815, South Main
Street, Monticello, Utah (MS00184) 5
v
ACKNOWLEDGMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge M. K. Jensen for analysis of soil samples and G.K Stowe, M.K
Jensen and T. L. Holmes for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1992, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at
A33230367815, South Main Street, Monticello, Utah. The Environmental
Technology Section (ETS) of Oak Ridge National Laboratory was assigned the
responsibility of verifying the data supporting the adequacy of remedial action and
confirming the site's compliance with DOE guidelines. The ETS found that the
site successfully meets the DOE remedial action objectives. Procedures used by
the ETS are described in the Environmental Technology Section Procedures
Manual (ORNL, 1993).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT A33230367815, South Main Street
MONTICELLO, UTAH (MS00184)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War n. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Environmental
Assessment Group in the Environmental Technology Section of the Health Sciences Research
Division at Oak Ridge National Laboratory under DOE contract DE-AC05-84OR21400 with Martin
Marietta Energy Systems, Inc.
2
During 1992, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a vacant lot located at A33230367815, South Main Street, Monticello, Utah.
The remedial action plan required excavation of all exterior contamination. When the
excavation was completed, the property was resurveyed, including soil sampling, to ensure
the removal of all contamination, backfilled with uncontaminated material, and restored to
a condition comparable to that which existed prior to remedial action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Environmental Technology Section (ETS) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the A33230367815,
South Main Street site. This report describes the methods and results of that verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 1595 yd3 of mill
tailings 6 to 120 inches deep. However, during the actual removal process, a total of 2394
yd3 of contaminated earth and uranium mill tailings, 12 to 204 inches deep were removed
from a 1476 m2 area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of gamma scans with a scintillometer and soil
sampling. Samples representative of the bottom 15-cm (6-in.) soil layers of 18 excavated
areas were collected and blended to form representative composite soil samples for each
verification area.
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Exterior gamma exposure rate measurements, taken by Geotech, from the excavated
areas prior to backfilling ranged from 13 to 59 /JR/h.
SoH Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. There were 18 excavated areas for this
property. Geotech's analysis of these samples showed ^Ra concentrations from <1.0 to
3.6 pCi/g in the composite sample. ORNL ETS obtained a percentage of these soil
samples and performed a confirmatory analysis, which showed ^Ra concentrations from
1.2 to 4.0 pCi/g. These values are below the DOE guideline value of 15 pCi/g for soil
layers >15 cm below the surface (Table 1). Results of Geotech and ORNL soil sample
analyses are given in Table 2.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
Review of the property folio and completion report revealed three discrepancies:
1. The verification map indicates Vll, V12, and V13 overlap onto MS00051.
These excavations would include soil samples taken from MS00051. The
completion report fails to mention this information for area Vll.
2. The excavation control and verification log dated August 13, 1992 indicates
the excavation verified as V7 and V8, was inaccessible and soil samples
were taken using the bucket of a track-hoe instead of the usual composite
method.
3. The Parcel No. and Legal description read A33230367816, Section 31,
T33S., R24E., Salt Lake Base Meridian, City of Monticello, County of San
Juan, State of Utah. They should read as follows: A33230367815, Section
36, T33S., R23E, Salt Lake Base Meridian, City of Monticello, County of
San Juan, State of Utah.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first IS cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to 222Rn
progeny
Average annual radon proge-
ny concentration (including
background)
0.03 WL
(DOE 1990)
Table 2. Results of ORNL analysis of Geotech soil samples
from A3323036781S, South Main Street, Monticello Utah (MS00184)
^Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No.6 (cm)
XI
X10
X17
X18
NAU-067
NAN-804
NAS-782
NAS-783
>15
>15
>15
>15
1.5
1.2
4.0
2.1
1.1
2.7
3.6
2.1
" An X-type sample is a split of the sample taken by the remedial action contractor.
b Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
REFERENCES
Abramiuk I. N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00184, Address: A33230367815, South Main Street,
Monticello, Utah 84535, Geotech, Grand Junction, Colorado, July, 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1993. Environmental Technology Section procedures manual. ORNL
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
4 r- OOE ID NO.: MS-00184-VL
Property Address: Parcel No. A33230367815, South Main Street
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
RUST Geotech Inc. of Energy (DOE)
YES NO NOT TAKEN YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2.
In-situ [ ] Lab [X]
Interior gamma is < 20 //R/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21.
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Decontamination and
Decommissioning
Program (Rev. 03/02/87).
[X]* [ ] [ ]
[X] [ ] [ ]
[ ] [X] [ ]
[ ] [ ] [X]
MI] [ 1
[*1 [ ] [ ]
[ ] [ ] [X] [ ] [ ] [*]
(Vacant Lot)
[ ] [ 1 [X] [ ] [ ] [yl
(Vacant Lot)
[ ] tX] [ ]
[ ] [ ] [VT
COMMENTS: *The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
SFCERTIFED SFMS-00184
- DOE ID NO.: MS-00184-VL
RUST GEOTECH INC. RECOMMENDATION
Based on the RUST Geotech Inc. evaluation, I recommend this property for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with application of supplemental
standards per 40 CFR 192.21.
Date Harry A. P^rry ^
Decontamination and Decommissioning
Program Manager
RUST Geotech Inc.
DOE UMTRA EVALUATION
[*] Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with application of
supplemental standards per 40 CFR 192.21.
Decontamination and Decommissioning Program
Certification Official
Department of Energy
Date
4
PROPERTY COMPLETION REPORT
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
DOE ID NO.: MS-00186-MR
ADDRESS: 249 SOUTH SECOND EAST STREET
MONTICELLO, UTAH 84535
SEPTEMBER 1993
Prepared for
Environmental Restoration Program
Department of Energy
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
FOR
FOR
by
Harry^A. Perry'
Program Manager
RUST Geotech Inc. has been granted authorization to conduct remedial action under
the Environmental Restoration Program. Remedial action was done in accordance
with the U.S. Environmental Protection Agency "Standards for Cleanup of Land and
Buildings Contaminated with Residual Radioactive Materials from Inactive Uranium
Processing Sites," 40 CFR 192.12, 192.20-23.
4 ' *
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.1.3 Radon Decay-Product Concentration (RDC) Measurement .... 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
i
DOE ID NO.: MS-00186-MR
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Environmental Restoration Program with the primary objective of
reducing the potential hazard to the public due to long-term exposure to
low-level radioactivity associated with the offsite mill tailings derived from
the former U.S. Atomic Energy Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to provide
additional sources of vanadium needed during World War II. Various
government agencies operated the mill until 1947. The AEC obtained the
mill in 1948 and operated it through 1959 under cost-type contracts to
provide both uranium and vanadium. Mill operations were terminated on
January 1, 1960.
The mill processed approximately one million tons of ore during the AEC
operations. Throughout the operating period, mill tailings from the
Monticello millsite were removed from the site and used for construction-
related activities in the vicinity.
1.2 Criteria for Remedial Action
The Environmental Restoration Program adopted the "Standards for
Remedial Actions at Inactive Uranium Processing Sites" (40 CFR Part 192)
for all cleanup activities under the MVP Project. These standards were
prepared by the U.S. Environmental Protection Agency (EPA) to establish
guidelines for the control of tailings piles and the cleanup of buildings and
open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Inclusion Survey Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the EPA
standards. This property was evaluated on the basis of the EPA standards
by the U.S. Department of Energy (DOE), which determined that the
property contained mill tailings (residual radioactive material) exceeding the
EPA standards. The Remedial Action Contractor was notified of the
inclusion of this property into the Environmental Restoration Program and
was authorized by the DOE to conduct remedial action as required to bring
the property into conformance with the EPA standards.
1
DOE ID NO.: MS-00186-MR
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
MS-00186-MR
Parcel No. M-70-2; beginning at the NW corner of Lot 2, Block 11, east
214.5 feet, south 89.5 feet, west 107.25 feet, north 29.5 feet, west 107.25
feet, north 60.0 feet to beginning, City of Monticello, County of San Juan,
State of Utah
Property Address:
Property Owners:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
249 South Second East Street
Monticello, Utah 84535

Major Residential (MR)
Oak Ridge National Laboratory
October 23, 1989
RUST Geotech Inc.
March 29, 1990
Sonderegger Construction
P.O. Box 6
Monticello, Utah
May 21, 1990
June 14, 1990
Interior:
Exterior:
0 cubic yards
549 cubic yards
1,376 square meters (m2)
September 1993
2
DOE ID NO.: MS-00186-MR
OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual radioactive
material (Appendix Figure 2.1). Interior assessed Area C (brick veneer on
the house) was excluded from remedial action based on gamma exposure
rates that did not exceed the EPA standard, as discussed in the REA.
Once excavation was complete, the affected area was resurveyed for
possible remaining residual radioactive material and, upon attaining
satisfactory results, was backfilled with uncontaminated material. The
property was restored to a physical condition comparable to that which
existed prior to remedial action activities.
2.2 Previously Unidentified Contamination
The radiological assessment (excluding assessed Area C) identified
180 cubic yards of contamination, ranging from 6 inches to 15 inches
deep, within the property. The remedial action process included the
removal of approximately 549 cubic yards of residual radioactive material,
ranging from 8 inches to 18 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
DOE ID NO.: MS-00186-MR
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by RUST Geotech Inc. during
October 1989, as described in the final REA dated March 1990.
Appendix Figure 2.1 shows the extent of assessed contamination
and identifies the areas recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to backfilling.
Following the gamma scan, soil samples representative of the
6-inch-thick soil layer at the bottom of the excavation were
collected. These samples were blended to form composite
samples representing the verification areas (Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 13 microroentgens per hour (//R/h)
to 24 //R/h (Appendix Figure 2.1). The results of analyses for
radium-226 in 15 composite soil samples ranged from
1.6 picocuries per gram (pCi/g) to 7.0 pCi/g (Appendix Table 3.1).
3.1.3 Radon Decay-Product Concentration (RDC) Measurement
Based on measurements representing an annual average, the
RDC was 0.0074 working level (WL), as indicated in Appendix
Table 3.2. Appendix Figure 2.1 shows the measurement location
on the ground floor (the lowest habitable level of the structure).
4
DOE ID NO.: MS-00186-MR
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by the EPA standards (40 CFR 192.12, 192.20-23),
as indicated in the Certification Data Summary below.
Therefore, the property located at 249 South Second East Street, in
Monticello, Utah, is recommended for certification as required by the
Environmental Restoration Program guidelines, and the appropriate
records should be documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Standards
Shall not exceed 20 //R/h
above background.*
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Results
Range for the ground
floor was 12 //R/h to
28 //R/h.
Annual average was
0.0074 WL.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background* in the
15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above background7 in any
15-cm-thick soil layer
more than 15 cm below
the surface, averaged
over 100 m2.
< 5 pCi/g above
background.
Soil sample results
ranged from 1.6 pCi/g
to 7.0 pCi/g.
*The background exposure rate is approximately 14//R/h.
The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00186-MR
4.0 APPENDIX
Appendix Tables:
Table 3.1 Post-Excavation Sample/Measurement Results
Table 3.2 Radon Decay-Product Concentration
Measurement Results
Appendix Figure:
Figure 2.1 Interior and Exterior Extent of Contamination -
RADIOLOGICAL AS-BUILT
MM-JEK:09-15-93
MS-00186.MR WP51
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00186-MR
Address: 249 South Second East Street, Monticello, Utah
The analytical uncertainties in the table are reported at the 95-percent confidence
interval.
Exposure- Soil
Rate Range Sample Meas. Radium-226 Potassium Thorium
Area {//R/h) Ticket No. Method* (pCi/g) (pCi/g) (pCi/g)
V-l
V-2
V-3
V-4
V-5
V-6
V-7
V-8
V-9
V-10
V-ll
V-12
V-13
V-14
V-15
13
14
13
1
1
1
15
1
1
13
1
1
1
1
13 -
19
18
17
18
20
22
24
20
18
17
19
24
18
18
20
MNZ 641
MNZ 642
MNZ 643
MNZ 644
MNZ 645
MNZ 646
MNZ 647
MLT 201
MLT 203
MLT 204
MLT 205
MLT 206
MLT 207
MLT 208
MLT 209
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
AL
2.2
2.9
1.8
1.9
2.5
3.6
5.7
7.0
3.8
1.6
4.5
5.4
3.1
4.0
3.3
0.4
0.5
0.3
0.3
0.4
0.5
0.8
0.9
0.5
0.3
0.6
0.7
0.4
0.5
0.5
15.5
15.0
16.0
15.2
17.8
15.8
16.0
16.6
17.5
13.4
14.5
15.9
13.0
14.7
14.6
3.6
3.6
3.7
3.7
3.9
3.8
3.7
3.4
3.5
3.5
3.4
3.5
3.3
3.4
3.3
0.8
1.0
1.0
0.9
1.1
1.3
1.1
1.3
0.8
1.1
1.2
1.0
0.9
1.0
1.4
0.2
0.2
0.3
0.2
0.3
0.3
0.3
0.3
0.2
0.3
0.3
0.3
0.2
0.3
0.3
See Appendix Figure 2.1 for the verification areas.
*AL = Analytical Laboratory
7
Table 3.2
Radon Decay-Product Concentration Measurement Results
DOE ID No.: MS-00186-MR
Address: 249 South Second East Street, Monticello, Utah
Instrument Type: Terradex Radtrak® Detector
Radon
Detector Tracks Per Concentration Working
Number Start Date End Date mm2 (pCi/L) Level
3142710 09-12-90 09-17-91
3142005 09-12-90 09-17-91
3142684 09-12-90 09-17-91
14.6 1.72 0.0086
12.4 1.46 0.0073
10.7 1.26 0.0063
Annual Average: 0.0074
See Appendix Figure 2.1 for the measurement location.
8
, 10
30
28
26
24
22
20
18
16
14
12
12 1 4 16 18 20 22 24 26 28
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LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN yuR/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE
POST-REMEDIAL ACTION RADON DECAY-PRODUCT
CONCENTRATION MEASUREMENT LOCATION
38
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13-17 13-17 14-18
© 12 12 10
J 12-28
© 10 V-2 V-1 5 V-1 2
12 14-18 13-20 14-24 v^j;:;;::::;;:; 6 >-.\ 0
©
18
12
13-19 10 1 2
11 10 15
14-19
13 1 6 L_ 24
rs
4-20
40
ASSESSED AREA C (BRICK VENEER ON THE HOUSEj
WAS EXCLUDED FROM REMEDIAL ACTION
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
RM00186V 09/30/93 TMT/529
20 10
NORTH
SCALE IN FEET
20
RADIOLOGICAL AS-BUILT
FIGURE 2.1
INTERIOR AND EXTERIOR EXTENT OF CONTAMINATION
40
THIS DRAWING. PREPARED FOR THE ENVIRONMENTAL RESTORATION
PROGRAM, IS FOR THE SOLE USE OF THE U.S. DEPARTMENT OF
ENERGY AND ITS CONTRACTORS. IT IS NOT A LAND SURVEY PLAT,
UTILITY LOCATION PLAT, OR OTHER IMPROVEMENT SURVEY PLAT
AND IS NOT TO BE RELIED UPON FOR THE ESTABLISHMENT OF
FENCE. BUILDING, OR OTHER FUTURE IMPROVEMENT LINES.
RESIDENCE-NO. Or OCCUPANTS
HOH-RESI0E»CE-yA"-HR3./WH.
INSTRUMENT NO.
SURVEY DATE
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE. COLORADO
3K
rr
CHCCKTO^
PROJ. CNCtV
249 SOUTH SECOND EAST ST.
MONTICELLO, UTAH
APPROVAL
GEOTECH INC
APPROVAL 60C •BATT
ootioNo. MS-00186-MR
1 n 1 ? 1 4 16 18 20 22 24 26 28 30 32 34 36
3-B00186-V1,MT.1 or 1
38 40
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
249 SOUTH 2ND EAST STREET
MONTICELLO, UTAH (MS00186-MR)
A.R. Jones
November 1993
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
Radon Measurement Results 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from 249 South 2nd East Street,
Monticello, Utah (MS00186-MR) 5
v
ACKNOWLEIXJJMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge G. A. Pierce for analysis of soil samples and G. K. Stowe and M. K.
Jensen for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and perfonning remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1990, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at 249
South 2nd East Street, Monticello, Utah. The Environmental Technology Section
(ETS) of Oak Ridge National Laboratory was assigned the responsibility of
verifying the data supporting the adequacy of remedial action and confirming the
site's compliance with DOE guidelines. The ETS found that the site successfully
meets the DOE remedial action objectives. Procedures used by the ETS are
described in the Environmental Technology Section Procedures Manual (ORNL,
1993).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT 249 SOUTH 2ND EAST STREET
MONTICELLO, UTAH (MS00186-MR)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War II. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was perfoimed by members of the Environmental
Assessment Group in the Environmental Technology Section of the Health Sciences Research
Division at Oak Ridge National Laboratory under DOE contract DE-AC05-84OR21400 with Martin
Marietta Energy Systems, Inc
2
During 1990, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a private residence located at 249 South 2nd East Street, Monticello, Utah.
The remedial action plan required excavation of all exterior contamination. When the
excavation was completed, the property was resurveyed, including soil sampling, to ensure
the removal of all contamination, backfilled with uncontaminated material, and restored to
a condition comparable to that which existed prior to remedial action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Environmental Technology Section (ETS) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the 249 South 2nd
East Street site. This report describes the methods and results of that verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 180 yd3 of mill
tailings 6 to 15 inches deep. However, during the actual removal process, a total of 549
yd3 of contaminated earth and uranium mill tailings, 8 to 18 inches deep were removed
from a 1376 m2 area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of gamma scans with a scintillometer, ground-level
and basement scans of the building and a surface scan of the exterior and soil sampling.
Samples representative of the bottom 15-cm (6-in.) soil layers of 15 excavated areas were
collected and blended to form representative composite soil samples for each verification
area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Gamma exposure rate measurements taken by Geotech at the ground-level of the
residence ranged from 12 to 28 /iR/h. Exterior surface gamma measurements taken from
the excavated areas prior to backfilling ranged from 13 to 24 /iR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. There were 15 excavated areas for this
property. Geotech's analysis of these samples showed ^Ra concentrations from 1.6 to 7.0
pCi/g in the composite sample. ORNL ETS obtained 4 of these soil samples and
performed a confirmatory analysis, which showed ^Ra concentrations from 2.5 to 3.6
pCi/g. These values are below the DOE guideline value of 15 pCi/g for soil layers > 15
cm below the surface (Table 1). Results of Geotech and ORNL soil sample analyses are
given in Table 2. Confirmatory analysis for samples XI through XI1 was not possible due
to insufficient sample material.
Radon Measurement Results
Radon decay-product concentration (RDC) measurements for this site were
determined by the alpha-track method. To monitor radon levels, Geotech placed three
Alpha-track detectors on the ground floor of the residence located on this property for a
period of approximately one year (from September 12, 1990 to September 17, 1991). The
average annual working level (WL) of radon progeny concentration, as determined by the
Tech./Ops-Landauer Corporation, was 0.0074, which is well below the 0.03-WL guideline
given in Table ,1.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. Upon provision of additional information from H. Perry to
G. Pierce dated September 30, 1993, Resubmittal of Property Completion Reports, and
further review of the property folio and completion report ORNL is in agreement with
the RAC's exclusion of the brick veneer from remedial action. The RDC measurement
confirms no health risks are associated with the brick veneer. It is concluded that the site
successfully meets the DOE remedial action objectives.
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to 222Rn
progeny
Average annual radon proge-
ny concentration (including
background)
0.03 WL
(DOE 1990)
Table 2. Results of ORNL analysis of Geotech soil samples
from 249 South 2nd East Street, Monticello Utah (MS00186-MR)
^Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No* (cm)
X12
X13
X14
X15
MLT-206
MLT-207
MLT-208
MLT-209
>15
>15
>15
>15
3.2
2.5
3.6
2.8
5.4
3.1
4.0
3.3
" An X-type sample is a split of the sample taken by the remedial action contractor.
' Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
REFERENCES
Abramiuk I. Ret al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00186-MR, Address: 249 South 2nd East Street,
Monticello, Utah 84535, Geotech, Grand Junction, Colorado, September 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1993. Environmental Technology Section Procedures Manual. ORNL
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
DOE ID NO.: MS-00186-MR
Property Address: 249 South Second East Street
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
RUST Geotech Inc. of Energy (DOE)
YES NO NOT TAKEN YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2.
In-situ [ ] Lab [X]
Interior gamma is < 20 jjR/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21.
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Environmental Restoration
Program (Rev. 03/02/87).
[X]* [ ] [ ]
[X] [ ] [ ]
[X] [ ] [ ]
[X] [ ] [ ]
[ ] [X] [ ]
t 1 [ 1 [X]
[X] [ ] [ ]
[X] [ ] [ ]
DO [ 1 [ 1
[/] [ ] [ 1
[ ] 1X1 [ ]
[ ] [ ] PCI
COMMENTS: *The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
SFCERT i FED SFMS-00186
DOE ID NO.: MS-00186-MR
RUST GEOTECH INC. RECOMMENDATION
Based on the RUST Geotech Inc. evaluation, I recommend this property for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
iarry A. Retry
Program Manager
RUST Geotech Inc.
Date
f3oAS
DOE EVALUATION
IX] Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental
standards were applied per 40 CFR 192.21.
Environmental Restora
Certification Official
Department of Energy
on Program Date
1 AJ tr~
DOE ID NO.: MS-00238-VL
Property Address: 116 East Third South Street
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
RUST Geotech Inc. of Energy (DOE)
YES NO NOT TAKEN YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2.
In-situ [ ] Lab [X]
Interior gamma is < 20 //R/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21.
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Environmental Restoration
Program (Rev. 03/02/87).
[X]* [ ] [ ]
[X] [ ] [ ]
[ ] [X] [ ]
[ ] [ ] IX]
[>1 [ 1 I ]
IX] I 1 [ ]
[ ] [ ] [X] [ ] [ ] [yj
(Vacant Lot)
[ ] [ ] [X] [ ] t ] [>]
(Vacant Lot)
[ 1 [/]
[ ] [ ] IA
COMMENTS: *The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
nmiiiiii
SFCERTI FED SFMS-89009
DOE ID NO.: MS-00238-VL
RUST GEOTECH INC. RECOMMENDATION
Based on the RUST Geotech Inc. evaluation, I recommend this property for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
A arry Date
Program Manager
RUST Geotech Inc
DOE EVALUATION
[XI Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental
standards were applied per 40 CFR 192.21.
Environmental Restoration Program
Certification Official
Department of Energy
15 fti,
Date
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00238-VL
ADDRESS: 116 EAST THIRD SOUTH STREET
MONTICELLO, UTAH 84535
DECEMBER 1993
Prepared for
Environmental Restoration Program
Department of Energy
by
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
Harr A
m Progr
. Perry
Manager
RUST Geotech Inc. has been granted authorization to conduct remedial action under
the Environmental Restoration Program. Remedial action was done in accordance
with the U.S. Environmental Protection Agency "Standards for Cleanup of Land and
Buildings Contaminated with Residual Radioactive Materials from Inactive Uranium
Processing Sites," 40 CFR 192.12, 192.20-23.
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
DOE ID NO.: MS-00238-VL
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Environmental Restoration Program with the primary objective of
reducing the potential hazard to the public due to long-term exposure to
low-level radioactivity associated with the offsite mill tailings derived from
the former U.S. Atomic Energy Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to provide
additional sources of vanadium needed during World War II. Various
government agencies operated the mill until 1947. The AEC obtained the
mill in 1948 and operated it through 1959 under cost-type contracts to
provide both uranium and vanadium. Mill operations were terminated on
January 1, 1960.
The mill processed approximately one million tons of ore during the AEC
operations. Throughout the operating period, mill tailings from the
Monticello millsite were removed from the site and used for construction-
related activities in the vicinity.
1.2 Criteria for Remedial Action
The Environmental Restoration Program adopted the "Standards for
Remedial Actions at Inactive Uranium Processing Sites" (40 CFR Part 192)
for all cleanup activities under the MVP Project. These standards were
prepared by the U.S. Environmental Protection Agency (EPA) to establish
guidelines for the control of tailings piles and the cleanup of buildings and
open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Inclusion Survey Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the EPA
standards. The Remedial Action Contractor was notified of the inclusion
of this property into the Environmental Restoration Program and was
authorized by the DOE to conduct remedial action as required to bring the
property into conformance with the EPA standards.
1
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owners:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
DOE ID NO.: MS-00238-VL
MS-00238-VL
Parcel No. M-60; the W2N2 of Lot 3,
Block 9, Monticello Townsite Survey,
County of San Juan, State of Utah
116 East Third South Street
Monticello, Utah 84535

Vacant Lot (VL)
Oak Ridge National Laboratory
January 25, 1990
RUST Geotech Inc.
July 16, 1990
Crowley Construction
East Route
Monticello, Utah
August 4, 1992
September 25, 1992
Interior: 0 cubic yards
Exterior: 299 cubic yards
1,362 square meters (m2)
November 1993
2
DOE ID NO.: MS-00238-VL
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual radioactive
material (Appendix Figure 2.1). Once excavation was complete, the
affected area was resurveyed for possible remaining residual radioactive
material and, upon attaining satisfactory results, was backfilled with
uncontaminated material. The property was restored to a physical
condition comparable to that which existed prior to remedial action
activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified contamination, ranging from
6 inches to 12 inches deep, within the property. The remedial action
process included the removal of approximately 299 cubic yards of residual
radioactive material, ranging from 6 inches to 12 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00238-VL
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by RUST Geotech Inc. during
April 1990, as described in the final REA dated July 1990.
Appendix Figure 2.1 shows the extent of assessed contamination
and identifies the area recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to backfilling.
Following the gamma scan, soil samples representative of the
6-inch-thick soil layer at the bottom of the excavation were
collected. These samples were blended to form composite
samples representing the verification areas (Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 13 microroentgens per hour (/yR/h)
to 23 //R/h (Appendix Figure 2.1). The results of analyses for
radium-226 in 16 composite soil samples ranged from
2.0 picocuries per gram (pCi/g) to 4.9 pCi/g (Appendix Table 3.1).
The composite samples representing Areas V-15 and V-16 included
soil samples taken from MS-00361-RS.
4
DOE ID NO.: MS-00238-VL
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by the EPA standards (40 CFR 192.12, 192.20-23),
as indicated in the Certification Data Summary below.
Therefore, the property located at 116 East Third South Street, in
Monticello, Utah, is recommended for certification as required by the
Environmental Restoration Program guidelines, and the appropriate
records should be documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Standards
Shall not exceed 20 //R/h
above background.
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Results
Not applicable:
vacant lot.
Not applicable:
vacant lot.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background* in the
15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below
the surface, averaged
over 100 m2.
< 5 pCi/g above
background.
Soil sample results
ranged from 2.0 pCi/g to
4.9 pCi/g.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
OOE ID NO.: MS-00238-VL
4.0 APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
MM-JEK: 10-04-93
MS-00238.VL WP51
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00238-VL
Address: 116 East Third South Street, Monticello, Utah
Area
Exposure-Rate
Range (//R/h)
Soil Sample
Ticket No.
Meas.
Method*
Radium-226
(pCi/g)
V-l
V-2
V-3
V-4
V-5
V-6
V-7
V-8
V-9
V-10
V-ll
V-12
V-13
V-14
V-15f
V-16f
14
15
15
14
15
15
14
15
15
14
14
15
15
15
15
13
19
20
20
19
18
19
19
19
18
19
19
23
18
19
18
17
NAU 247
NAU 248
NAU 249
NAU 250
NAU 251
NAU 252
NAU 253
NAU 254
NAU 255
NAU 256
NAU 257
NAU 258
NAU 259
NAU 260
NAV 967
NAV 968
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
2.8
3.7
4.9
2.6
3.2
3.0
2.2
2.9
2.7
2.7
2.4
4.4
2.0
4.7
2.8
2.5
See Appendix Figure 2.1 for the verification areas.
*OCS = Opposed Crystal System
'The composite samples representing Areas V-15 and V-16 included soil samples
taken from MS-00361-RS.
7
10
30
28
26
24
22
20
18 -
1 6
14
12
Y
10
12 14 16 18 20 22 24 26
EAST THIRD SOUTH STREET
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14-16
SCALE IN FEET
20 10 0 20
RM00238V 11/19/93 TMT/529
40
NORTH
28
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V-1 1 V-10
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LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN fj,R/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
40
- 28
- 26
- 24
RADIOLOGICAL AS-BUILT
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
THIS DRAWING, PREPARED FOR THE ENVIRONMENTAL RESTORATION
PROGRAM, IS FOR THE SOLE USE OF THE U.S. DEPARTMENT OF
ENERGY AND ITS CONTRACTORS. IT IS NOT A LAND SURVEY PLAT,
UTILITY LOCATION PLAT, OR OTHER IMPROVEMENT SURVEY PLAT
AND IS NOT TO BE RELIED UPON FOR THE ESTABLISHMENT OF
FENCE, BUILDING, OR OTHER FUTURE IMPROVEMENT LINES.
RESIDENCE-NO. OF OCCUPANTS
HON—RESIDENCE—MAN—HRS./WK.
INSTRUMENT NO.
U.S. DEPARTMENT OF ENERGY
GRANO JUNCTION PROJECTS OFFICE, COLORADO
•JK
1 16 EAST THIRD SOUTH STREET
MONTICELLO, UTAH
APPROVAL
GKOIKM INC
DATE I APPROVAL DOE T6vfT
DOE ID NO. MS-00238-VL
D"c wo 3-B00238-V1 gHT 1 „ 1
30
22
20
18
16
14
12
10
10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
OAK RIDGE NATIONAL LABORATORY GRAND JUNCTION OFFICE
RO. BOX 2567
GRAND JUNCTION, COLORADO 81502 OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS, INC.
MAR 8 01994
Donald N. Leske
Project Manager, Monticello Projects
U.S. Department of Energy
P. 0. Box 2567
Grand Junction, 81502
Dear Mr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil and exterior gamma exposure
rate at this property.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
MVP/IVC Project Manager
Environmental Assessment Group
Location Number:
Location Address:
MSQ0238-VL
116 East 3rd South Street
Monticello. Utah 84535
Property Owner:
Owner Address:

Tenant Name: Vacant lot
Attachments
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
116 EAST 3RD SOUTH STREET
MONTICELLO, UTAH (MS00238-VL)
A. R. Jones
March 1994
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CDNTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from 116 East 3rd South Street,
Monticello, Utah (MS00238-VL) 5
v
ACKNOWLEDGMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge M. K. Jensen for analysis of soil samples and J. R. Sauvage and T. L. Meyer
for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1992, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at 116
East 3rd South Street, Monticello, Utah. The Environmental Technology Section
(ETS) of Oak Ridge National Laboratory was assigned the responsibility of
verifying the data supporting the adequacy of remedial action and confirming the
site's compliance with DOE guidelines. The ETS found that the site successfully
meets the DOE remedial action objectives. Procedures used by the ETS are
described in the Environmental Technology Section Procedures Manual (ORNL,
1993).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT 116 EAST 3RD SOUTH STREET
MONTICELLO, UTAH (MS00238-VL)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War IL Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Environmental
Assessment Group in the Environmental Technology Section of the Health Sciences Research
Division at Oak Ridge National Laboratory under DOE contract DE-AC05-84OR21400 with Martin
Marietta Energy Systems, Inc.
2
During 1992, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a vacant lot located at 116 East 3rd South Street, Monticello, Utah. The
remedial action plan required excavation of all exterior contamination. When the
excavation was completed, the property was resurveyed, including soil sampling, to ensure
the removal of all contamination, backfilled with uncontaminated material, and restored to
a condition comparable to that which existed prior to remedial action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Environmental Technology Section (ETS) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the 116 East 3rd
South Street site. This report describes the methods and results of that verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 223 yd3 of mill
tailings 6 to 12 inches deep. However, during the actual removal process, a total of 299
yd3 of contaminated earth and uranium mill tailings, 6 to 12 inches deep were removed
from a 1,362 m2 area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of gamma scans with a scintillometer, ground-level
and basement scans of the building and a surface scan of the exterior and soil sampling.
Samples representative of the bottom 15-cm (6-in.) soil layers of the 16 excavated areas
were collected and blended to form representative composite soil samples for each
verification area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Exterior surface gamma exposure rate measurements taken by Geotech from the
excavated areas prior to backfilling ranged from 13 to 23 /iR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. There were 16 excavated areas for this
property. Geotech's analysis of these samples showed ^Ra concentrations from 2.0 to 4.9
pCi/g in the composite sample. ORNL ETS obtained a percentage of these soil samples
and performed a confirmatory analysis, which showed 226Ra concentrations from 2.3 to 3.7
pCi/g. These values are below the DOE guideline value of 15 pCi/g for soil layers > 15
cm below the surface (Table 1). Results of Geotech and ORNL soil sample analyses are
given in Table 2.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to 222Rn Average annual radon proge- 0.03 WL
progeny ny concentration (including
background)
(DOE 1990)
5
Table 2. Results of ORNL analysis of Geotech soil samples
from 116 East 3rd South Street, Monticello Utah (MS0Q238-VL)
^Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No* (cm)
X2 NAU 248 >15 3.7 3.7
X9 NAU 255 >15 2.3 2.7
" An X-type sample is a split of the sample taken by the remedial action contractor.
* Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
6
REFERENCES
Abramiuk I. N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00238-VL, Address: 116 East 3rd South Street,
Monticello, Utah 84535, Geotech, Grand Junction, Colorado, December 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remeaial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1993. Environmental Technology Section Procedures Manual. ORNL
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
"DOE ID NO.: MS-00243-VL
Property Address: Parcel No. A000000D002B, South Third East Street
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
RUST Geotech Inc. of Energy (DOE)
YES NO NOT TAKEN YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2.
In-situ [ ] Lab [X]
Interior gamma is < 20 //R/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21,
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Environmental Restoration
Program (Rev. 03/02/87).
[X]* [ ] [ ]
[X] [ ] [ ]
[ ] [ ] [X]
(Vacant Lot)
[ ] [X] [ ]
[ ] [ ] [X]
M [ 1 I 1
[XI [ ] [ ]
[ ] [ I [X]
[ ] [ ] [X] [ ] [ ] [XJ
(Vacant Lot)
[ 1 DO [ 1
[ ] [ ] [>4
COMMENTS: *The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
lilllllllll IliiHI
SFCERTI FED SFMS-89029
DOE ID NO.: MS-00243-VL
RUST GEOTECH INC. RECOMMENDATION
Based on the RUST Geotech Inc. evaluation, I recommend this property for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
DO Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental
standards were applied per 40 CFR 192.21.
Program Manager
RUST Geotech Inc.
Date
DOE EVALUATION
Date
Certification Official
Department of Energy
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00243-VL
ADDRESS: PARCEL NO. A000000D002B
SOUTH THIRD EAST STREET
MONTICELLO, UTAH 84535
SEPTEMBER 1993
Prepared for
Environmental Restoration Program
Department of Energy
by
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
Harry Perry
Program Manager
RUST Geotech Inc. has been granted authorization to conduct remedial action under
the Environmental Restoration Program. Remedial action was done in accordance
with the U.S. Environmental Protection Agency "Standards for Cleanup of Land and
Buildings Contaminated with Residual Radioactive Materials from Inactive Uranium
Processing Sites," 40 CFR 192.12, 192.20-23.
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification * 5
4.0 APPENDIX 6
DOE ID NO.: MS-00243-VL
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Environmental Restoration Program with the primary objective of
reducing the potential hazard to the public due to long-term exposure to
low-level radioactivity associated with the offsite mill tailings derived from
the former U.S. Atomic Energy Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to provide
additional sources of vanadium needed during World War II. Various
government agencies operated the mill until 1947. The AEC obtained the
mill in 1948 and operated it through 1959 under cost-type contracts to
provide both uranium and vanadium. Mill operations were terminated on
January 1, 1960.
The mill processed approximately one million tons of ore during the AEC
operations. Throughout the operating period, mill tailings from the
Monticello millsite were removed from the site and used for construction-
related activities in the vicinity.
1.2 Criteria for Remedial Action
The Environmental Restoration Program adopted the "Standards for
Remedial Actions at Inactive Uranium Processing Sites" (40 CFR Part 192)
for all cleanup activities under the MVP Project. These standards were
prepared by the U.S. Environmental Protection Agency (EPA) to establish
guidelines for the control of tailings piles and the cleanup of buildings and
open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the EPA
standards. The Remedial Action Contractor was notified of the inclusion
of this property into the Environmental Restoration Program and was
authorized by the DOE to conduct remedial action as required to bring the
property into conformance with the EPA standards.
1
DOE ID NO.: MS-00243-VL
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
MS-00243-VL
Beginning at a point 76.5 feet north of the SW corner of Block D, Monticello
Townsite Survey, east 172 feet, north 10.5 feet, west 172 feet, south
10.5 feet to point of beginning, County of San Juan, State of Utah
Property Address:
Property Owners:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
Parcel No. A000000D002B
South Third East Street
Monticello, Utah 84535

Vacant Lot (VL)
Not applicable; inclusion requested by the
Remedial Action Contractor
December 9, 1991
RUST Geotech Inc.
March 17, 1992
DLB Unlimited, Inc.
P.O. Box 40513
Grand Junction, Colorado
August 17, 1992
September 25, 1992
Interior:
Exterior:
0 cubic yards
39 cubic yards
168 square meters (m2)
September 1993
2
DOE ID NO.: MS-00243-VL
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual radioactive
material (Appendix Figure 2.1). Once excavation was complete, the
affected area was resurveyed for possible remaining residual radioactive
material and, upon attaining satisfactory results, was backfilled with
uncontaminated material. The property was restored to a physical
condition comparable to that which existed prior to remedial action
activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified contamination, 6 inches deep,
within the property. The remedial action process included the removal of
approximately 39 cubic yards of residual radioactive material, 7 inches
deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00243-VL
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by RUST Geotech Inc. during
April and May 1991, as described in the final REA dated
March 1992. Appendix Figure 2.1 shows the extent of assessed
contamination and identifies the area recommended to undergo
remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to backfilling.
Following the gamma scan, soil samples representative of the
6-inch-thick soil layer at the bottom of the excavation were
collected. These samples were blended to form composite
samples representing the verification areas (Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 13 microroentgens per hour (//R/h)
to 19 //R/h (Appendix Figure 2.1). The results of analyses for
radium-226 in two composite soil samples were 2.8 picocuries per
gram (pCi/g) and 4.2 pCi/g (Appendix Table 3.1).
4
DOE ID NO.: MS-00243-VL
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by the EPA standards (40 CFR 192.12, 192.20-23),
as indicated in the Certification Data Summary below.
Therefore, the property located at Parcel No. A000000D002B, South
Third East Street, in Monticello, Utah, is recommended for certification
as required by the Environmental Restoration Program guidelines, and
the appropriate records should be documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Standards
Shall not exceed 20 //R/h
above background.
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Results
Not applicable:
vacant lot.
Not applicable:
vacant lot.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background* in the
15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below
the surface, averaged
over 100 m2.
< 5 pCi/g above
background.
Soil sample results were
2.8 pCi/g and 4.2 pCi/g.
The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00243-VL
4.0 APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
MM-KMA:08-12-93
MS-00243.VL WP51
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00243-VL
Address: Parcel No. A000000D002B, South Third East Street, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range (//R/h) Ticket No. Method* (pCi/g)
V-l 15-19 NAN 447 OCS 4.2
V-2 15 - 19 NAN 448 OCS 2.8
See Appendix Figure 2.1 for the verification areas.
*OCS = Opposed Crystal System
7
10
30
12 1 4 1 6 18 20 22 24 26 28 30 32 34 36 38 40
28
26
24
LU
LU
LY
I—
CO
I—
CO
<
LU
Q
or
ZD
o co
V-2
15-19
6 XC
13-16
6 X C
V-1
15-19
22
20
18 -
16
1 4
1 2
Y
©
©
I I
12-15
12
V-1
16-17
NORTH
RM00243V 09/15/93 RTB/242
—^ X
10
LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN ^R/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE
RADIOLOGICAL AS-BUILT
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
SCALE IN FEET
20 10 0 20 40
THIS DRAWING, PREPARED FOR THE ENVIRONMENTAL RESTORATION
PROGRAM, IS FOR THE SOLE USE OF THE U.S. DEPARTMENT OF
ENERGY AND ITS CONTRACTORS. IT IS NOT A LAND SURVEY PLAT,
UTILITY LOCATION PLAT. OR OTHER IMPROVEMENT SURVEY PLAT
AND IS NOT TO BE RELIED UPON FOR THE ESTABLISHMENT OF
FENCE, BUILDING. OR OTHER FUTURE IMPROVEMENT LINES.
RESIDENCE-NO. OF OCCUPANTS
NON-RESIDENCC-MAN-HRS./WK.
INSTRUMENT NO.
SURVEY DATE
A.E. APP. NO. DATE
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE, COLORADO
PROJ. ENGR.
SUBMITTED
Si
•M3
PARCEL NO. A000000D002B
SOUTH THIRD EAST STREET
MONTICELLO, UTAH
GEOTECH INC
DATE I APPROVAL DOE "DAfr
DOEioNo. MS-00243-VL
owe.NO. 3-B00243-V1 SHT 1 „ 1
10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
OAK RIDGE NATIONAL LABORATORY GRAND JUNCTION OFFICE
P. O. BOX 2567
GRAND JUNCTION, COLORADO 81502 OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS. INC.
NOV S 0 1: 1993
Donald N. Leske
Project Manager, Monticello Projects
U.S. Department of Energy
P. 0. Box 2567
Grand Junction, 81502
Dear Mr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Gretchen A. Pierce
MVP/IVC Project Manager
Environmental Assessment Group
Location Number:
Location Address:
MS00243-VL
A000000D002B
South 3rd East Street
Monticello. Utah 84535
Property Owner:
Owner Address:

Attachments
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
A000000DOO2B, SOUTH 3RD EAST STREET
MONTICELLO, UTAH (MS00243-VL)
AR. Jones
November 1993
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIHCATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of Geotech soil samples from A000000D002B, South 3rd East Street,
Monticello, Utah (MS00243-VL) 5
v
ACXNOWIJEDGMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge M. K. Jensen and and G.K. Stowe for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1992, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at
A000000D002B, South 3rd East Street, Monticello, Utah. The Environmental
Technology Section (ETS) of Oak Ridge National Laboratory was assigned the
responsibility of verifying the data supporting the adequacy of remedial action and
confirming the site's compliance with DOE guidelines. The ETS found that the
site successfully meets the DOE remedial action objectives. Procedures used by
the ETS are described in the Environmental Technology Section Procedures
Manual (ORNL, 1993).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT A000000D002B, SOUTH 3RD EAST STREET
MONTICELLO, UTAH (MS00243-VL)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War EL Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Environmental
Assessment Group in the Environmental Technology Section of the Health Sciences Research
Division at Oak Ridge National Laboratory under DOE contract DE-AC05-84OR21400 with Martin
Marietta Energy Systems, Inc
2
During 1992, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a Vacant lot located at A0O00O0D002B, South 3rd East Street, Monticello,
Utah. The remedial action plan required excavation of all exterior contamination. When
the excavation was completed, the property was resurveyed, including soil sampling, to
ensure the removal of all contamination, backfilled with uncontaminated material, and
restored to a condition comparable to that which existed prior to remedial action
(Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Environmental Technology Section (ETS) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the
A000000D002B, South 3rd East Street site. This report describes the methods and results
of that verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 28 yd3 of mill tailings
6 inches deep. However, during the actual removal process, a total of 39 yd3 of
contaminated earth and uranium mill tailings, 7 inches deep were removed from a 168 m2
area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of exterior gamma scans with a scintillometer, and
soil sampling. Samples representative of the bottom 15-cm (6-in.) soil layers of two
excavated areas were collected and blended to form representative composite soil samples
for each verification area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Exterior surface gamma measurements taken from the excavated areas by Geotech,
prior to backfilling ranged from 15 to 19 /iR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. There were two excavated areas for this
property. Geotech's analysis of these samples showed ^Ra concentrations from 2.8 to 4.2
pCi/g in the composite sample. ORNL ETS was unable to obtain a percentage of these
soil samples to perform a confirmatory analysis. These values are below the DOE
guideline value of 15 pCi/g for soil layers >15 cm below the surface (Table 1). Results of
Geotech soil sample analyses are given in Table 2.
CONCLUSION
Results of Geotech soil sample analysis show that radionuclide concentrations are
within applicable DOE guidelines. Based upon the results of the post-remedial-action
data, which are confirmed by the verification assessment data, these radiological
measurements fall below the limits prescribed by DOE guidelines. It is concluded that the
site successfully meets the DOE remedial action objectives.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionucb'de con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to 222Rn Average annual radon proge- 0.03 WL
progeny ny concentration (including
background)
(DOE 1990)
Table 2. Results of ORNL analysis of Geotech soil samples
from AOO0OO0DO02B, South 3rd East Street, Monticello Utah (MS00243-VL)
^Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No.* (cm)
XI NAN447 >15 c 4.2
X2 NAN448 >15 c 2.8
a An X-type sample is a split of the sample taken by the remedial action contractor.
h Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
0 ORNL was unable to obtain these samples.
REFERENCES
Abramiuk I. N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00243-VL, Address: A00000OD002B, South 3rd East
Street, Monticello, Utah 84535, Geotech, Grand Junction, Colorado, September
1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1993. Environmental Technology Section Procedures Manual. ORNL
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
DOE ID NO.: MS-0027i-r?S
Property Address: 216 West Center Street
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
RUST Geotech Inc. of Enerov (DOE)
YES NO NOT TAKEN YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2.
In-situ [ ] Lab [X]
Interior gamma is < 20 //R/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is <, 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21.
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Environmental Restoration
Program (Rev. 03/02/87).
[X]* [ ] [ ]
[X] [ ] [ ]
[X] [ ] [ ]
[X] [ ] [ ]
[ ] [X] [ ]
[ ] [ ] [X]
[yi [ ] [ ]
W [ } [ i
[ ] [VI [ i
[ ] [ ] IYO
COMMENTS: *The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
illinium
SFCERTI FED
lilllllllli
SFMS-00274
DOE ID NO.: MS-002. »S
RUST GEOTECH INC. RECOMMENDATION
Based on the RUST Geotech Inc. evaluation, I recommend this property for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
marry A. Pe/fy ^ Date
Mans Program Manager
RUST Geotech Inc
DOE EVALUATION
iWP Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental
standards were applied per 40 CFR 192.21.
EnviroTTfnental Restoration Pn
Certification Official
Department of Energy
Date
KM1 93
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00274-RS
ADDRESS: 216 WEST CENTER STREET
MONTICELLO, UTAH 84535
AUGUST 1993
Prepared for
Environmental Restoration Program
Department of Energy
if( AUG 2 0 1993 j||
by " •
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
HanVA. Perry ^
Program Manager
RUST Geotech Inc. has been granted authorization to conduct remedial action under
the Environmental Restoration Program. Remedial action was done in accordance
with the U.S. Environmental Protection Agency "Standards for Cleanup of Land and
Buildings Contaminated with Residual Radioactive Materials from Inactive Uranium
Processing Sites," 40 CFR 192.12, 192.20-23.
Illlllllllll iiiiiiiinig
SFOCPLRPTS SFMS-80274
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.1.3 Radon Decay-Product Concentration (RDC) Measurement .... 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
i
DOE ID NO.: MS-00274-RS
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Environmental Restoration Program with the primary objective of
reducing the potential hazard to the public due to long-term exposure to
low-level radioactivity associated with the offsite mill tailings derived from
the former U.S. Atomic Energy Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to provide
additional sources of vanadium needed during World War II. Various
government agencies operated the mill until 1947. The AEC obtained the
mill in 1948 and operated it through 1959 under cost-type contracts to
provide both uranium and vanadium. Mill operations were terminated on
January 1, 1960.
The mill processed approximately one million tons of ore during the AEC
operations. Throughout the operating period, mill tailings from the
Monticello millsite were removed from the site and used for construction-
related activities in the vicinity.
1.2 Criteria for Remedial Action
The Environmental Restoration Program adopted the "Standards for
Remedial Actions at Inactive Uranium Processing Sites" (40 CFR Part 192)
for all cleanup activities under the MVP Project. These standards were
prepared by the U.S. Environmental Protection Agency (EPA) to establish
guidelines for the control of tailings piles and the cleanup of buildings and
open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Inclusion Survey Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the EPA
standards. The Remedial Action Contractor was notified of the inclusion
of this property into the Environmental Restoration Program and was
authorized by the DOE to conduct remedial action as required to bring the
property into conformance with the EPA standards.
1
DOE ID NO.: MS-00274-RS
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
MS-00274-RS
Beginning at the southeast corner of Lot 1, Block L, Monticello Townsite
Additional Survey; west 130 feet, north 70 feet, east 130 feet, south 70 feet
to the point of beginning; except and reserving a right-of-way
for vehicle and pedestrian travel over the following described portion of said
tract of land: beginning 130 feet west of the southeast corner of Lot 1 of said
Block L, north 70 feet, east 10 feet, south 70 feet, west 10 feet
to the point of beginning, County of San Juan, State of Utah
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
216 West Center Street
Monticello, Utah 84535

Residential Simple (RS)
Oak Ridge National Laboratory
May 30, 1990
RUST Geotech Inc.
October 17, 1990
Crowley Construction
East Route
Monticello, Utah
May 20, 1991
May 29, 1991
Interior:
Exterior:
0 cubic yards
3 cubic yards
7 square meters (m2)
August 1993
2
DOE ID NO.: MS-00274-RS
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual radioactive
material (Appendix Figure 2.1). Once excavation was complete, the
affected area was resurveyed for possible remaining residual radioactive
material and, upon attaining satisfactory results, was backfilled with
uncontaminated material. The property was restored to a physical
condition comparable to that which existed prior to remedial action
activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified 2 cubic yards of contamination,
12 inches deep, within the property. The remedial action process included
the removal of approximately 3 cubic yards of residual radioactive
material, 12 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00274-RS
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by RUST Geotech Inc. during
August 1990, as described in the final REA dated October 1990.
Appendix Figure 2.1 shows the extent of assessed contamination
and identifies the area recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to backfilling.
Following the gamma scan, soil samples representative of the
6-inch-thick soil layer at the bottom of the excavation were
collected. These samples were blended to form a composite
sample representing the verification area (Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 13 microroentgens per hour (//R/h)
to 17 //R/h (Appendix Figure 2.1). The result of analysis for
radium-226 in one composite soil sample was 1.7 picocuries per
gram (pCi/g), as indicated in Appendix Table 3.1.
3.1.3 Radon Decay-Product Concentration (RDC) Measurement
Based on measurements representing an annual average, the
RDC was 0.0060 working level (WL), as indicated in Appendix
Table 3.2. Appendix Figure 2.1 shows the measurement location
in the basement (the lowest habitable level of the structure).
4
DOE ID NO.: MS-00274-RS
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by the EPA standards (40 CFR 192.12, 192.20-23),
as indicated in the Certification Data Summary below.
Therefore, the property located at 216 West Center Street, in
Monticello, Utah, is recommended for certification as required by the
Environmental Restoration Program guidelines, and the appropriate
records should be documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Standards
Shall not exceed 20 //R/h
above background.*
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Results
Range for the basement
was 12 //R/h to 14//R/h.
Annual average was
0.0060 WL.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background1 in the
15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below
the surface, averaged
over 100 m2.
< 5 pCi/g above
background.
Soil sample result was
1.7 pCi/g.
*The background exposure rate is approximately 14 //R/h.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00274-RS
4.0 APPENDIX
Appendix Tables:
Table 3.1 Post-Excavation Sample/Measurement Results
Table 3.2 Radon Decay-Product Concentration
Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
MM-DAG:08-02-93
MS-00274.RS WP51
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00274-RS
Address: 216 West Center Street, Monticello, Utah
The analytical uncertainties in the table are reported at the 95-percent confidence
interval. A less-than sign (<) indicates that the minimum detection limit based on
Compton background was reached.
Exposure- Soil
Rate Range Sample Meas. Radium-226 Potassium Thorium
Area (//R/h) Ticket No. Method* (pCi/g) (pCi/g) (pCi/g)
V-l 13-17 NAB 991 AL 1.7 ± 0.3 23.5 ± 3.3 < 0.1
See Appendix Figure 2.1 for the verification area.
*AL = Analytical Laboratory
7
Table 3.2
Radon Decay-Product Concentration Measurement Results
DOE ID No.: MS-00274-RS
Address: 216 West Center Street, Monticello, Utah
Instrument Type: Terradex Radtrak® Detector
Detector
Number Start Date End Date
Tracks Per
mm2
Radon
Concentration
(pCi/L)
Working
Level
3468200
3468163
3468209
01-07-92
01-07-92
01-07-92
01-06-93
01-06-93
01-06-93
12.2
12.1
12.5
1.18
1.17
1.23
0.0059
0.0059
0.0062
Annual Average: 0.0060
See Appendix Figure 2.1 for the measurement location.
8
10
30
12 14 16 20 22 24
i—r
26 28 30 32 34 36
1—r
38 40
30
28 28
26
24
22
20
18
16
14
12
Y
10
v-1
13-17
12
3-15 13-15 J
RDC
ONE STORY BRICK
HOUSE W/BASEMENT 13-15
12-14 o
13-15
L
"777" 777
WEST CENTER STREET
"777-
SCALE IN FEET
20 10 0 20
RM00274V 08/06/93 TMT/529
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O
THIS DRAWING. PREPARED FOR THE ENVIRONMENTAL RESTORATION
PROGRAM. IS FOR THE SOLE USE OF THE U.S. DEPARTMENT OF
ENERGY AND ITS CONTRACTORS. IT IS NOT A LAND SURVEY PLAT,
UTILITY LOCATION PLAT, OR OTHER IMPROVEMENT SURVEY PLAT
AND IS NOT TO BE RELIED UPON FOR THE ESTABLISHMENT OF
FENCE, BUILDING, OR OTHER FUTURE IMPROVEMENT LINES.
®
<D
I 1
L__l
12-15
12
V-1
16-17
LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN ^R/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE
POST-REMEDIAL ACTION RADON DECAY-PRODUCT
CONCENTRATION MEASUREMENT LOCATION
26
24
22
20
18
RADIOLOGICAL AS-BUILT
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
16
RESIOENCC-NO. OT OCCUPANTS
NOH-HESIOEHCE-HMI-HRS./WK.
INSTRUMENT NO.
SURVEY OATE
VERIFICATION
CK. A.E. APP. NO. OATE CK. A.C. APP.
14
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE, COLORADO
DESIGNED
£21
Vk3
216 WEST CENTER STREET
MONTICELLO, UTAH
12
APPROVAL
GEOTECH INC
BATE I APPROVAL DOE TKTF"
OOEIONO. MS-00274-RS
DWC.NO. 3-B00274-V1lHT.1 „ 1 10
10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
t
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS. INC.
OAK RIDGE NATIONAL LABORATORY GRAND JUNCTION OFFICE
P. O. BOX 2567
GRAND JUNCTION, COLORADO 81S02
OCT 19 1993
Donald N. Leske
Project Manager, Monticello Projects
U.S. Department of Energy
P. 0. Box 2567
Grand Junction, 81502
Dear Mr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material at
Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial Action
Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the ^Ra concentration in the soil, indoor radon daughter
concentration, and indoor gamma exposure rate at this property.
Therefore, this property is recommended for certification by the U.S. Department
of Energy.
Sincerely,
Gretchen A. Pierce
MVP/IVC Project Manager
Environmental Assessment Group
Location Number:
Location Address:
MS00274
216 West Center Street
Monticello. Utah 84535
Property Owner:
Owner Address:

Attachments
RECORDS MANAPEMENT
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE B INDEPENDENT VERTFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
216 WEST CENTER STREET
MONTICELLO, UTAH (MS00274)
A.R. Jones
October 1993
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
LIST OF FIGURES v
ACKNOWLEDGMENTS vii
ABSTRACT vii
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
GEOTECH SURVEY RESULTS 3
Gamma Measurements 3
Soil Sample Analysis 3
Radon Measurment Analysis 3
ORNL SURVEY RESULTS 6
Gamma Measurements 6
Soil Sample Analysis 6
CONCLUSION 6
REFERENCES 8
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL and Geotech analyses of soil samples from 216 West Center Street
Monticello, Utah (MS00274) 5
LIST OF FIGURES
1 Property Map 7
v
ACKNOWIJEIXJMENTS
Research for this project was sponsored by the U.S. Department of Energy, Office of
Environmental Restoration, Southwestern Area Programs. The author wishes to acknowledge
M.K. Jensen for analysis of soil samples and G.K. Stowe and M.K. Jensen for technical
reviews.
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was accepted into
the U.S. Department of Energy's (DOE's) Surplus Facilities Management Program, with the
objectives of restoring the government-owned mill site to safe levels of radioactivity, disposing
of or containing the tailings in an environmentally safe manner, and performing remedial
actions on off-site (vicinity) properties that had been contaminated by radioactive material
resulting from mill operations. During 1991, RUST Geotech Inc., the remedial action
contractor designated by DOE, performed remedial action on the vicinity property at 216
West Center Street, Monticello, Utah. The Environmental Technology Section (ETS) of Oak
Ridge National Laboratory was assigned the responsibility of verifying the data supporting the
adequacy of remedial action and con&ming the site's compliance with DOE guidelines. The
ETS found that the site successfully meets the DOE remedial action objectives. Procedures
used by ETS are described in the Environmental Technology Section Procedures Manual
(ORNL, 1993).
vii
1
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT 216 WEST CENTER STREET
MONTICELLO, UTAH (MS0Q274)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War II. Various government
agencies operated the mill until 1947. In 1948 the Atomic Energy Commission (AEC)
obtained the mill and operated it under contract through 1959 to provide both uranium and
vanadium. Mill operations were terminated on January 1,1960. In 1961 the mill tailings piles
were leveled and graded, covered with rock and soil, and seeded with native grasses. During
1974 and 1975, the ore stockpiles were removed from the site, and the mill foundations were
buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city of
Monticello, in San Juan County, Utah. The site is bordered on the south and southeast by
land held by the U.S. Bureau of Land Management Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium ore.
Vanadium and uranium were the only substances extracted in the milling process. Other
constituents of the ore remained in the tailings and were not separated prior to disposal.
During the years of active mill operation, the mill tailings were normally moist, so erosion was
minimal. However, throughout the mill's operating period, area residents used these tailings
as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy (DOE)
initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure the safe
caretaking and decommissioning of government facilities that had been retired from service
but still had radioactive contamination. In 1980 the mill site at Monticello was accepted into
the SFMP, and the Monticello Remedial Action Project (MRAP) was established to restore
the government-owned mill site to safe levels of radioactivity, to dispose of or contain the
tailings in an environmentally safe manner, and to perform remedial actions on off-site
(vicinity) properties that had been contaminated by radioactive material resulting from mill
operations. The Monticello mill site and the tailings remain in the custody of the DOE
Grand Junction, Colorado, Projects Office. In 1983 remedial actions for vicinity properties
were separated from MRAP with establishment ofthe Monticello Vicinity Properties (MVP)
Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Environmental
Assessment Group in the Environmental Technology Section of the Health Sciences Research
Division at Oak Ridge National Laboratory under DOE contract DE-AO05-84OR21400 with Martin
Marietta Energy Systems, Inc.
2
During 1991, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject of
this report, a private residence located at 216 West Center Street, Monticello, Utah. The
remedial action plan required excavation of all exterior contamination, backfilling with
uncontaminated material, and restoration to a condition comparable to that which existed
prior to remedial action (Geotech 1993). When the excavation stage was completed, the
property was resurveyed, including soil sampling, by Geotech and by an independent
contractor to verify the data supporting the adequacy of remedial action and to confirm the
site's compliance with DOE guidelines. The Environmental Technology Section (ETS) of
Oak Ridge National Laboratory (ORNL) has been designated the Independent Verification
Contractor for the 216 West Center Street site. This report describes the methods and results
of the verification surveys.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available documenta-
tion adequately and accurately describes the post-remedial-action radiological conditions of
the entire property that is to be certified and (2) that the remedial action reduced
contarnination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993) indicates
the property was evaluated by DOE on the basis of Environmental Protection Agency
standards (DOE 1990) and that excess residual radioactive materials were present Thus it
was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 2 yd3 of mill tailings 12
inches deep. However, during the actual removal process, a total of 3 yd3 of contaminated
earth and uranium mill tailings, 12 inches deep, were removed from a 7 m2 area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines for
protection against radiation are given in Table 1.
GEOTECH SURVEY RESULTS
Gamma Measurements
Gamma exposure rate measurements taken by Geotech over the ground-level of the
residence ranged from 12 to 14 /iR/h. Exterior surface gamma measurements taken from the
excavated areas prior to backfilling ranged from 13 to 17 uR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated areas
from the bottom 15-cm (6-in.) soil layers. These samples were blended to form a composite
soil sample representative of an average over the exterior verification area. Geotech's
analysis of this sample showed ^Ra concentrations of 1.7 pCi/g in the composite sample.
ORNL ETS was unable to obtain this soil sample or perform a confirmatory analysis. This
value is below the DOE guideline value of 15 pCi/g for soil layers > 15 cm below the surface
(Table 1). Results of Geotech and ORNL soil sample analyses are given in Table 2.
Radon Measurement Results
Radon decay-product concentration (RDC) measurements for this site were determined
by the alpha-track method. To monitor radon levels, Geotech placed three Alpha-track
detectors on the ground floor of the residence located on this property for a period of
approximately one year (from January 7, 1992 to January 6, 1993). The IVC was present
during placement and retrieval of the detectors to verify the RDC measurements. The
average annual working level (WL) of radon progeny concentration, as determined by the
Tech./Ops-Landauer Corporation, was 0.0060, which is well below the 0.03-WL guideline
given in Table 1. The procedures and methods used to obtain the annual average WL are
deemed adequate and the results accurate by the IVC.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first IS cm of soil below the
surface; IS pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm below
the surface
Exposure to 222Rn
progeny
Average annual radon progeny
concentration (including
background)
0.03 WL
(DOE 1990)
Table 2. Results of ORNL and Geotech analyses of soil samples
from 216 West Center Street, Utah (MS00274)
^Ra concentration (pCi/gl
ORNL Geotech
sample sample Depth
No.* No* (cm) Confirmatory5 ORNL'' Geotech
XI
VI
NAB-991 >15 1.7
1.3
" An X-type sample is a split of the sample taken by the remedial action contractor.
' Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated areas
were taken by RUST Geotech Inc., and these samples were blended to form composite
soil samples, which represent an average over verification areas.
' ORNL performed analysis on aliquots of the composite samples taken by Geotech
(confirmatory).
d Composite samples collected by ORNL from approximately the same excavated locations
sampled by Geotech.
Soil sample not available for confirmatory analysis.
6
ORNL SURVEY RESULTS
Gamma Measurements
Measurements taken by ORNL over the ground surface in the excavated areas prior to
backfilling ranged from 15 to 22 uR/h (Figure 1).
Soil Sample Analysis
ORNL sampled the excavated area prior to backfilling, collecting aliquots representative
of those areas from the bottom 15-cm (6-in.) soil layers. These samples were blended to form
a composite soil sample representative of an average over the exterior verification area.
ORNL's analysis of this composite sample showed a ^Ra concentrations of 1.3 pCi/g. This
value is below the DOE guideline value of 15 pCi/g for soil layers > 15 cm below the surface
(Table 1). Results of ORNL sample analyses are given in Table 2.
CONCLUSION
The results of all Geotech and ORNL soil sample analyses show that radionuclide
concentrations are within applicable DOE guidelines. Based upon the results of the post-
remedial-action data, which are confirmed by the verification assessment data, these
radiological measurements fall below the limits prescribed by DOE guidelines. It is concluded
that the site successfully meets the DOE remedial action objectives.
NORTH 200 WEST STREET
or<
om
i—\
LdLd
VI
• •.••»•• .-•
VTI 15-22 ^R/h
1—
111
UJ or
1—
o;
LU
LU
o
I—
t/)
LU
mi
EXPLANATION
CONCRETE
ASSESSED AREA OF
CONTAMINATION
EXCAVATED
AREA
REMAINING
CONTAMINATION
MEASUREMENT
AREA IDENTIFIER &
COMPOSITE SAMPLE
_ IDENTIFIER OF
Bl I AVERAGED AREA &
BIASED SAMPLE
J
^1
L
r
FEET
9 10
0 1 3
METERS
80
MS00274
216 WEST CENTER STREET
MONTICELLO, UTAH
Figure 1. Property Mop
8
REFERENCES
Abrarniuk, LN. et aL 1989. Monticello Remedial Action Project Site Analysis Report, GJ-
10, prepared by Bendix Field Engineering Corporation, Grand Junction, Colorado, for
the U.S. Department of Energy, Surplus Facilities Management Program, Richland,
Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00274, Address: 216 West Center Street, Monticello, Utah
84535, Geotech, Grand Junction, Colorado, August 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of Environmental
Restoration, Formerly Utilized Sites Remedial Action Programs and Decontamination and
Decommissioning Program, Revision 3, November 1990. U.S. Department of Energy,
Washington, D.C.
ORNL, 1993. Environmental Technology Section procedures manual. ORNL 6645/RI
Oak Ridge National Laboratory, Grand Junction, Colorado.
DOE ID NO.: MS- frhZ,<jrZSRS
Property Address: M A//MLTH THittfr lo&ST STU-CI
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
Chem-Nuclear Geotech. Inc.
YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 mJ. [X]* [ ] [ ]
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 ma. (X] [ ] t ]
In-situ [ ] Lab
Interior gamma is < 20 uR/h
above background in any
occupied or habitable
structure. l*C] [ ] [ ]
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level. [X] [ ] [ ]
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21. [ ] [vj [ ]
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Decontamination and
Decommissioning [ ] [ ] [xT
Program (Rev. 03/02/87).
U.S. Department
of Energy <DOE,
YES NO NOT TAKEN
[XJ [ 1 ( ]
IX)
0^
'[X]
[ 1
[ ]
[ ]
[ ]
[ ]
IX]
[ ]
( ]
[ ]
[ ]
( ]
COMMENTS: *The excavations were backfilled with materials that were measured
at the source showing that the Ra-226 concentrations are in the range of
normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
llillllllll
SFCERTI FED •ill
SFMS-00282
DOE ID NO. t MS- DO^Z.^vS
CHEM-NUCLEAR GEOTECH, INC., RECOMMENDATION
Based on the Chem-Nuclear Geotech, Inc., evaluation, I recommend this property
for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
Wo Pe rry 7 Date
Decontamination and Decommissioning Program Manager
Chem-Nuclear Geotech, Inc.
DOE EVALUATION
Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental standards
were applied per 40 CFR 192.21.
Decontamination and Decommissioning Program
Certification Official
Department of Energy
Date
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00282-RS
ADDRESS: 64 NORTH THIRD WEST STREET
MONTICELLO, UTAH 84535
JANUARY 1993
Prepared for
Decontamination and Decommissioning Program
Division of Facilities and Site Decommissioning
Department of Energy
JAN 22 1993
RECORDS MANAGEMENT
by
Chem-Nuclear Geotech, Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
A. Perry
Program Manager
Chem-Nuclear Geotech, Inc., has been granted authorization to conduct remedial
action under the Decontamination and Decommissioning Program. Remedial action
was done in accordance with the Environmental Protection Agency Standards for
Cleanup of Lands and Buildings Contaminated with Residual Radioactive Material
from Inactive Uranium Processing Sites, 40 CFR 192.12, 192.20-23.
IIII1I111H
SFOCPLRPTS 111
SFMS-02282
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.1.3 Radon Decay-Product Concentration (RDC) Measurement ... 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
DOE ID NO.: MS-00282-RS
1.0 SUNMART
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) project was accepted into
the Decontamination and Decommissioning Program with the primary
objective of reducing the potential hazard to the public due to
long-term exposure to low-level radioactivity associated with the
offsite mill tailings derived from the former U.S. Atomic Energy
Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to
provide additional sources of vanadium needed during World War II.
Various government agencies operated the mill until 1947. The AEC
obtained the mill in 1948 and operated it through 1959 under
cost-type contracts to provide both uranium and vanadium. Mill
operations were terminated on January 1, 1960.
The mill processed approximately one million tons of ore during the
AEC operations. Throughout the operating period, mill tailings from
the Monticello millsite were removed from the site and used for
construction-related activities in the vicinity.
1.2 Criteria for Remedial Action
The Decontamination and Decommissioning Program has adopted the
"Standards for Remedial Action at Inactive Uranium Processing Sites"
(40 CFR Part 192) for all cleanup activities under the MVP project.
These standards were prepared by the U.S. Environmental Protection
Agency (EPA) to establish guidelines for the control of tailings
piles and the cleanup of buildings and open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Inclusion Survey Contractor. The
DOE reviewed these evaluation results and determined that the
property contained mill tailings (residual radioactive material)
exceeding the EPA standards. The Remedial Action Contractor was
notified of the inclusion of this property into the Decontamination
and Decommissioning Program and was authorized by the DOE to conduct
remedial action as required to bring the property into conformance
with the EPA standards.
1
DOE ID NO.: MS-00282-RS
1.3 Suaaary of Remedial Action
DOE ID No.:
Legal Description:
MS-00282-RS
Parcel No. M-263: beginning at the W4 corner of Block L, Monticello
Townsite Survey, Plat A; east 80 feet, north 107.25 feet, west 80 feet,
south 107.25 feet to place of beginning; also beginning at the W4 corner
of Block L, Monticello Townsite Survey, Plat A; north 107.25 feet, west
36 feet, south 107.25 feet, east 36 feet to the place of beginning,
County of San Juan, State of Utah
Property Address:
Property Owners:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construct ion Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
64 North Third West Street
Monticello, Utah 84535

Monticello, Utah 84535
Residential Simple (RS)
Oak Ridge National Laboratory
April 3, 1990
Chem-Nuclear Geotech, Inc.
October 10, 1990
Sonderegger Construction
P.O. Box 6
Monticello, Utah
October 30, 1990
November 7, 1990
Interior: 0 cubic yards
Exterior: 5 cubic yards
17 square meters (m2)
January 1993
2
DOE ID NO.: MS-00282-RS
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual
radioactive material (Appendix Figure 2.1). Once excavation was
complete, the affected areas were resurveyed for possible remaining
residual radioactive material and, upon attaining satisfactory
results, were backfilled with uncontaminated material. The property
was restored to a condition comparable to that which existed prior
to remedial action activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified 2 cubic yards of
contamination, 6 inches deep, within the property. The remedial
action process included the removal of approximately 5 cubic yards
of residual radioactive material, 8 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00282-RS
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by Chem-Nuclear
Geotech, Inc., during August 1990, as described in the final
REA dated October 1990. Appendix Figure 2.1 shows the extent
of assessed contamination and identifies the areas
recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted
after the removal of residual radioactive material and prior
to backfilling. Following the gamma scan, soil samples
representative of the 6-inch-thick soil layer at the bottom
of the excavation were collected. These samples were blended
to form a composite sample representing the verification area
(Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined
during the gamma scan, ranged from 12 microroentgens per
hour (uR/h) to 20 uR/h (Appendix Figure 2.1). The result of
analysis for radium-226 in one composite soil sample was
2.6 picocuries per gram (pCi/g), as indicated in Appendix
Table 3.1.
3.1.3 Radon Decay-Product Concentration (RDC) Measurement
Based on measurements representing an annual average, the
RDC was 0.0271 working level (WL), as indicated in Appendix
Table 3.2. Appendix Figure 2.1 shows the measurement
location on the ground floor (the lowest habitable level of
the structure).
4
DOE ID NO.: MS-00282-RS
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property
to the extent required by the EPA standards (40 CFR 192.12,
192.20-23), as indicated in the Certification Data Summary below.
Therefore, the property located at 64 North Third West Street, in
Monticello, Utah, is recommended for certification as required by
the Decontamination and Decommissioning Program guidelines, and the
appropriate records should be documented.
Applicability
Habitable Structures
Exposure Rate:
Certification Data Summary
Standards
Shall not exceed 20 uR/h
above background.*
Survey Results
Range for the ground
floor was 12 uR/h to
15 uR/h.
Radon Decay-Product
Concentrat ion:
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Annual average* was
0.0271 WL.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background** in
the 15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above background** in any
15-cm-thick soil layer
more than 15 cm below the
surface, averaged over
100 m*.
< 5 pCi/g above
background.
Soil sample result was
2.6 pCi/g.
*The background exposure rate is approximately 14 uR/h.
**The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00282-RS
4.0 APPENDIX
Appendix Tables:
Table 3.1 Post-Excavation Sample/Measurement Results
Table 3.2 Radon Decay-Product Concentration (RDC)
Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00282-RS
Address: 64 North Third West Street, Monticello, Utah
The analytical uncertainties in the table are reported at the 95-percent
confidence interval.
Exposure- Soil
Rate Range Sample Meas. Radium-226 Potassium Thorium
Area (^R/h) Ticket No. Method* (pCi/g) (pCi/g) (pCi/g)
V-l 15-20 NAG 250 AL 2.6±0.2 22.8 ± 1.6 1.0+0.1
See Appendix Figure 2.1 for the verification area.
*AL = Analytical Laboratory
7
I
Table 3.2
Radon Decay-Product Concentration (RDC) Measurement Results
DOE ID No.: MS-00282-RS
Address: 64 North Third West Street, Monticello, Utah
Instrument Type: Terradex Radtrak* Detectors
Radon Average
Detector Tracks Per Concentration Working
Number Start Date End Date mm2 (pCi/1) Level (WL)
3160977 12-12-90 01-07-92
3169169 12-12-90 01-07-92
3160941 12-12-90 01-07-92
48.1 5.59 0.0280
47.0 5.45 0.0273
44.9 5.19 0.0260
Annual Average: 0.0271
See Appendix Figure 2.1 for the measurement location.
MM-VPF:12-28-92
MS-00282.RS WS
REV052592
8
14 12 16 18 20 22 24 26 28 30 32 34 36 38
V-1 LEGEND
15-20 ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN fiR/h
® ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION j - 26
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
B0:0 N DARY OF EXCAVATl0N •!~~
rr
®
•v.-.vj
12-15
o
GARAGE
12-13 13-15 AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION 2 24
i— 13-15 V-1 VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE cr 16-17
in
i POST-REMEDIAL ACTION RADON DECAY-PRODUCT
CONCENTRATION MEASUREMENT LOCATION RDC CO 22 • UJ
a ® tr. ONE STORY
STUCCO HOUSE
12-15
x
x 20
or o c Z
3-15
© RDC
18
13-15
rr
LOO I CAL AS^BUI LT RADIO
f FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
V-1
15-20
REVISIONS NO. OATE REVISIONS Br CK. A.E. APP. NO. OATE BV CK. A.E APP
RESIDENCE-NO- OF OCCUPANTS U.S. DEPARTMENT OF ENERGY
GRANO JUNCTION PROJECTS OFFICE, COLORADO rs NON-RESIDENCE—MAN-HRS.'WK
DESIGNED
r2: SCALE IN FEET 64 NORTH THIRD WEST STREET INSTRUMENT NO. SURVEYOR DRAWN PREPARED FOR W DEcWTAMiNATiON'ANO: THIS ()RAWING, rr m MONTICELLO. UTAH Y DECOMMISSIONING PROGRAM, IS:FOR THE SOLE USE OF THE
U.S. DEPARTMENT OF ENERGY ARD ITS CONTRACTORS. IT IS
NOT A: LAND SURVEY PLAT, UTILITY LOCATION PLAT, OR OTHER
IMPROVEMENT SURVEY PLAT AND IS NOT TO BE REUED UPON
FOR THE ESTABLISHMENT OF FENCE, BUILDING, OR OTHER :
FUTURE IMPROVEMENT LINES.
1 I I I I I L
CHECKED
PROJ. ENC
20 40 20 10 APPROVAL SUBMITTED OATE APPROVAL OOE DATE NORTH
SURVEY OATE T ME
^ RM00282Y 12/22/92 T329
J i j
OOEIONO MS-00282-RS
Geotech, Inc VERIFICATION DATE owa.NO3_B00282_v1 .
- 28
14
12
12 16 18 26 30 32 36 38 40
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS. INC.
GRAND JUNCTION OFFICE
P. 0. BOX 2567
GRAND JUNCTION. COLORADO 81502
MAR Bl
Jacob W. Gatrell
Office of Environmental Restoration
Southwestern Area Programs Division
U.S. Department of Energy
EM-451/GTN/D-247
Washington, DC 20545
Dear Mr. Gatrell:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil, indoor radon daughter
concentration, and indoor gamma exposure rate at this property.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Mary J. Wilson
Pollutant Assessments Group
Location Number: MS00282
Location Address: 64 North 3rd West Street
Monticello. Utah 84535
Property Owner:

Attachments
HEALTH AND SAFETY RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
64 NORTH 3RD WEST STREET
MONTICELLO, UTAH (MS00282)
S.K. Mather
March 1993
Work performed by the
POLLUTANT ASSESSMENTS GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CDNTENTS
UST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
Radon Measurement Results 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from 64 North 3rd West Street,
Monticello, Utah (MS00282) 5
v
ACXNOWLEIXJMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge M.K. Jensen for analysis of soil samples and A.R. Jones and G.K. Stowe for
technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1990 Chem-Nuclear Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at 64
North 3rd West Street, Monticello, Utah. The Pollutant Assessments Group
(PAG) of Oak Ridge National Laboratory was assigned the responsibility of
verifying the data supporting the adequacy of remedial action and confirming the
site's compliance with DOE guidelines. The PAG found that the site successfully
meets the DOE remedial action objectives. Procedures used by the PAG are
described in the Pollutant Assessments Group Procedures Manual (ORNL, 1992).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT 64 NORTH 3RD WEST STREET
MO^^^CELLO, UTAH (MS00282)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War II. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Pollutant Assessments
Group of the Health and Safety Research Division at Oak Ridge National Laboratory under DOE
contract DE-AC05-84OR21400 with Martin Marietta Energy Systems, Inc.
2
During 1990, Chem-Nuclear Geotech, Inc. (Geotech), the remedial action contractor
(RAC) designated by DOE, performed remedial action on the vicinity property that is the
subject of this report, a private residence located at 64 North 3rd West Street, Monticello,
Utah. The remedial action plan required excavation of all exterior contamination. When
the excavation was completed, the property was resurveyed, including soil sampling, to
ensure the removal of all contamination, backfilled with uncontaminated material, and
restored to a condition comparable to that which existed prior to remedial action
(Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Pollutant Assessments Group (PAG) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the 64 North 3rd
West Street site. This report describes the methods and results of that verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 2 yd3 of mill tailings
6 inches deep. However, during the actual removal process, a total of 5 yd3 of
contaminated earth and uranium mill tailings, 8 inches deep were removed from a 17 m2
area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of gamma scans with a scintillometer, ground-level
and basement scans of the building and a surface scan of the exterior and soil sampling.
A sample representative of the bottom 15-cm (6-in.) soil layers of one excavated area was
collected and blended to form a representative composite soil sample for the verification
area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Gamma exposure rate measurements taken by Geotech at the ground-level of the
residence ranged from 12 to IS /iR/h. Exterior surface gamma measurements taken from
the excavated areas prior to backfilling ranged from 15 to 20 //R/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected a soil sample representative of the excavated
area from the bottom 15-cm (6-in.) soil layers. The sample was blended to form a
composite soil sample representative of an average over the one exterior verification area.
Geotech's analysis of the sample showed a ^Ra concentration of 2.6 pCi/g in the
composite sample. ORNL PAG obtained this soil sample and performed a confirmatory
analysis, which showed ^Ra concentrations of 2.5 pCi/g. These values are below the
DOE guideline value of 15 pCi/g for soil layers > 15 cm below the surface (Table 1).
Results of Geotech and ORNL soil sample analyses are given in Table 2.
Radon Measurement Results
Radon decay-product concentration (RDC) measurements for this site were
determined by the alpha-track method. To monitor radon levels, Geotech placed three
Alpha-track detectors on the ground floor of the residence located on this property for a
period of approximately one year (from December 12, 1990 to January 07, 1992). The
average annual working level (WL) of radon progeny concentration, as determined by the
TechVOps-Landauer Corporation, was 0.027, which is below the 0.03-WL guideline given
in Table 1.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to 222Rn
progeny
Average annual radon proge-
ny concentration (including
background)
0.03 WL
(DOE 1990)
F«j* reZ<l
Table 2. Results of ORNL analysis of Geotech soil samples
from 64 North 3rd West Street, Monticello, Utah (MS00282)
226Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth
No." No/ (cm) ORNL Geotech
XI NAG-250 15-30 2.5 2.6
a An X-type sample is a split of the sample taken by the remedial action contractor.
* Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated areas were
taken by Geotech, and these samples were blended to form a composite soil sample, which
represents an average over one of the verification areas.
DOE ID NO.: MS-00398-VL
Property Address: 215 South Second West Street
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
RUST Geotech Inc. of Enerov (DOE)
YES NO NOT TAKEN YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
[X]* [ ] [ 1 [XI [ 1 [ 1
[X] [ ] [ 1 [>0 [ 1 [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2.
In-situ [ ] Lab [X]
Interior gamma is <, 20 //R/h
above background in any
occupied or habitable
structure. [ ]
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level. [ ]
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21. [ ]
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Environmental Restoration
Program (Rev. 03/02/87). [ ]
[ ] [X] [ ] [ ] fcfl
(Vacant Lot)
[ 1 [X] [ ] [ ] M
(Vacant Lot)
[X] [ ] [ ] [/]
[ ] [X] [ ] [ ] [yQ
COMMENTS: *The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of oamma
exposure rates that do not exceed 30 percent above normal background.
DOE ID NO.: MS-00398-VL
RUST GEOTECH INC. RECOMMENDATION
Based on the RUST Geotech Inc. evaluation, I recommend this property for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
[Xl Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental
standards were applied per 40 CFR 192.21.
Program Manager
RUST Geotech Inc.
Date
DOE EVALUATION
Environmental Restoratidn Program
Certification Official
Department of Energy
Date
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00398-VL
ADDRESS: 215 SOUTH SECOND WEST STREET
MONTICELLO, UTAH 84535
OCTOBER 1993
Prepared for
Environmental Restoration Program
Department of Energy
RUST Geotech Inc. has been granted authorization to conduct remedial action under
the Environmental Restoration Program. Remedial action was done in accordance
with the U.S. Environmental Protection Agency "Standards for Cleanup of Land and
Buildings Contaminated with Residual Radioactive Materials from Inactive Uranium
Processing Sites," 40 CFR 192.12, 192.20-23.
by
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
HahV'A. Perry '
Program Manager
TABLE OF CONTENTS
Section Page
1.0 SLHVJMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
DOE ID NO.: MS-00398-VL
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Environmental Restoration Program with the primary objective of
reducing the potential hazard to the public due to long-term exposure to
low-level radioactivity associated with the offsite mill tailings derived from
the former U.S. Atomic Energy Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to provide
additional sources of vanadium needed during World War II. Various
government agencies operated the mill until 1947. The AEC obtained the
mill in 1948 and operated it through 1959 under cost-type contracts to
provide both uranium and vanadium. Mill operations were terminated on
January 1, 1960.
The mill processed approximately one million tons of ore during the AEC
operations. Throughout the operating period, mill tailings from the
Monticello millsite were removed from the site and used for construction-
related activities in the vicinity.
1.2 Criteria for Remedial Action
The Environmental Restoration Program adopted the "Standards for
Remedial Actions at Inactive Uranium Processing Sites" (40 CFR Part 192)
for all cleanup activities under the MVP Project. These standards were
prepared by the U.S. Environmental Protection Agency (EPA) to establish
guidelines for the control of tailings piles and the cleanup of buildings and
open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Inclusion Survey Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the EPA
standards. The Remedial Action Contractor was notified of the inclusion
of this property into the Environmental Restoration Program and was
authorized by the DOE to conduct remedial action as required to bring the
property into conformance with the EPA standards.
1
DOE ID NO.: MS-00398-VL
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
MS-00398-VL
Parcel No. M-118; beginning at the NW corner of Lot 3, Block 15, Monticello
Townsite Survey, Plat A; south 66 feet, east 100 feet, north 66 feet, west
100 feet to beginning, County of San Juan, State of Utah
Property Address:
Property Owners:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
215 South Second West Street
Monticello, Utah 84535

Vacant Lot (VL)
Oak Ridge National Laboratory
June 18, 1991
RUST Geotech Inc.
October 21, 1991
Crowley Construction
East Route
Monticello, Utah
July 28, 1992
August 26, 1992
Interior:
Exterior:
0 cubic yards
2 cubic yards
4 square meters (m2)
October 1993
2
DOE ID NO.: MS-00398-VL
2.0 OPERATIONS SUMMARY N
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual radioactive
material (Appendix Figure 2.1). Once excavation was complete, the
affected area was resurveyed for possible remaining residual radioactive
material and, upon attaining satisfactory results, was backfilled with
uncontaminated material. The property was restored to a physical
condition comparable to that which existed prior to remedial action
activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified 2 cubic yards of contamination,
18 inches deep, within the property. The remedial action process included
the removal of approximately 2 cubic yards of residual radioactive
material, 12 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00398-VL
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by RUST Geotech Inc. during
August 1991, as described in the final REA dated October 1991.
Appendix Figure 2.1 shows the extent of assessed contamination
and identifies the area recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to backfilling.
Following the gamma scan, an individual soil sample representative
of the 6-inch-thick soil layer at the bottom of the excavation was
collected (Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 12 microroentgens per hour (//R/h)
to 20 //R/h (Appendix Figure 2.1). The result of analysis for
radium-226 in one individual soil sample was 1.5 picocuries per
gram (pCi/g), as indicated in Appendix Table 3.1.
4
DOE ID NO.: MS-00398-VL
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by the EPA standards (40 CFR 192.12, 192.20-23),
as indicated in the Certification Data Summary below.
Therefore, the property located at 215 South Second West Street, in
Monticello, Utah, is recommended for certification as required by the
Environmental Restoration Program guidelines, and the appropriate
records should be documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Standards
Shall not exceed 20 //R/h
above background.
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Results
Not applicable:
vacant lot.
Not applicable:
vacant lot.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background* in the
15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below
the surface, averaged
over 100 m2.
< 5 pCi/g above
background.
Soil sample result was
1.5 pCi/g.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00398-VL
4.0 APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
MM-JEK: 10-04-93
MS-00398.VL WP51
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00398-VL
Address: 215 South Second West Street, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range Ot/R/h) Ticket No. Method* (pCi/g)
V-l 18-20 NAT 851 OCS 1.5
See Appendix Figure 2.1 for the verification area.
*OCS = Opposed Crystal System
7
10
30
12 1 4 1 6 18 20 22 24 26 28 30 32 34 36 38 40
30
28 28
26
24
22
20
18 -
16 -
14
12
Y
10
UJ or
i—
to
\—
tn
UJ
o o
UJ
co
o co
WEST SECOND SOUTH STREET
LLL
r o
12-13
i
^ 12-13
-7^
o o
4. -
1
12
V-1
18-20
SHED
12-13
J rr
SCALE IN FEET
20 10 0 20
RM00398V 10/07/93 TMT/529
40
NORTH
THIS DRAWING, PREPARED FOR THE ENVIRONMENTAL RESTORATION
PROGRAM, IS FOR THE SOLE USE OF THE U.S. DEPARTMENT OF
ENERGY AND ITS CONTRACTORS. IT IS NOT A LAND SURVEY PLAT,
UTILITY LOCATION PLAT, OR OTHER IMPROVEMENT SURVEY PLAT
AND IS NOT TO BE RELIED UPON FOR THE ESTABLISHMENT OF
FENCE, BUILDING, OR OTHER FUTURE IMPROVEMENT LINES.
®
<D
I 1
I I
12-15
12
V-1
16-17
LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN yuR/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE
26
RADIOLOGICAL AS-BUILT
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
RESI0CNCC-NO. OF OCCUPANTS
NON -RESIDENCE -UAH -MRS./WK.
INSTRUMENT NO.
VERIFICATION
BY CK. A.E. APP. NO. OATE CK. A.E. APP.
U.S. DEPARTMENT OF ENERGY
GRANO JUNCTION PROJECTS OFFICE, COLORADO
9^ *>-lh
215 SOUTH SECOND WEST ST.
MONTICELLO, UTAH
APPROVAL
GEOTECH INC
DAT? I APPROVAL OOC •Bffr
OOEIONO. MS-00398-VL
owe.NO. 3-BQQ398-V1 «„,. 1 „ 1
24
22
20
18
16
14
12
10
10 12 1 4 16 18 20 22 24 26 28 30 32 34 36 38 40
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS. INC.
GRAND JUNCTION OFFICE
P. 0. BOX 2567
GRAND JUNCTION. COLORADO 81502
JAN 2 81994
Donald N. Leske
Project Manager, Monticello Projects
U.S. Department of Energy
P. 0. Box 2567
Grand Junction, 81502
Dear Mr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil, indoor radon daughter
concentration, and indoor gamma exposure rate at this property.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Gretchen A. Pierce
MVP/IVC Project Manager
Environmental Assessment Group
Location Number: MS00398
Location Address:
Property Owner:
Owner Address:
215 South 2nd West Street
Monticello. Utah 84535

Tenant Name: Vacant
Attachments
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
215 SOUTH 2ND WEST STREET
MONTICELLO, UTAH (MS00398)
A. R. Jones
January 1994
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from 215 South 2nd West Street,
Monticello, Utah (MS00398) 5
v
ACKNOWJ^DGMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge M. K. Jensen for analysis of soil samples and M. K Jensen and G. A. Pierce
for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or contairiing the tailings in an
environmentally safe manner, and perfonning remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1992, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at 215
South 2nd West Street, Monticello, Utah. The Environmental Technology Section
(ETS) of Oak Ridge National Laboratory was assigned the responsibility of
verifying the data supporting the adequacy of remedial action and confirming the
site's compliance with DOE guidelines. The ETS found that the site successfully
meets the DOE remedial action objectives. Procedures used by the ETS are
described in the Environmental Technology Section Procedures Manual (ORNL,
1993).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT 215 SOUTH 2ND WEST STREET
MONTICELLO, UTAH (MS00398)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War EL Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1,1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
'"The verification of remedial action was performed by members of the Environmental
Assessment Group in the Environmental Technology Section of the Health Sciences Research
Division at Oak Ridge National Laboratory under DOE contract DE-AC05-84OR21400 with Martin
Marietta Energy Systems, Inc.
During 1992, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a vacant lot located at 215 South 2nd West Street, Monticello, Utah. The
remedial action plan required excavation of all exterior contamination. When the
excavation was completed, the property was resurveyed, mcluding soil sampling, to ensure
the removal of all contamination, backfilled with uncontaniinated material, and restored to
a condition comparable to that which existed prior to remedial action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Environmental Technology Section (ETS) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the 215 South 2nd
West Street site. This report describes the methods and results of that verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 2 yd3 of mill tailings
18 inches deep. During the actual removal process, a total of 2 yd3 of contaminated earth
and uranium mill tailings, 12 inches deep were removed from a 4 m2 area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of gamma scans with a scintillometer, a surface
scan of the exterior and soil sampling. A single soil sample representative of the bottom
15-cm (6-in.) soil layers of the excavated area was collected.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not'been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Exterior gamma exposure rate measurements taken by Geotech from the excavated
areas prior to bacldllling ranged from 18 to 20 /iR/h.
SoH Sample Analysis
Prior to backfilling, Geotech collected an individual soil sample representative of the
excavated area from the bottom 15-cm (6-in.) soil layers. Geotech's analysis of this sample
showed a ^Ra concentration of 1.5 pCi/g in the sample. ORNL ETS obtained a
percentage of this soil sample and performed a confirmatory analysis, which showed a
Ra concentration of 2.8 pCi/g. These values are below the DOE guideline value of 15
pCi/g for soil layers >15 cm below the surface (Table 1). Results of Geotech and ORNL
soil sample analyses are given in Table 2.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Exposure to 222Rn
progeny
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
Average annual radon proge-
ny concentration (including
background)
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
0.03 WL
(DOE 1990)
Table 2, Results of ORNL analysis of Geotech soil samples
from 215 South 2nd West Street, Monticello Utah (MS00398)
Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No.fr (cm)
XI NAT 851 >15 2.8 1.5
An X-type sample is a split of the sample taken by the remedial action contractor.
Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
REFERENCES
Abramiuk L N.et aL1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00398, Address: 215 South 2nd West Street, Monticello,
Utah 84535, Geotech, Grand Junction, Colorado, October 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1993. Environmental Technology Section Procedures Manual ORNL
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
Tii'^ page, rec'6 'i-f/S^fy
DOE ID NO.: HS- OdH M 7 ~ l/Z-
Property Address: (o\ EfoST fiftSI ^SOUTU £T$.€€~\
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
Chem-Nuclear Geotech, Inc.
YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ fX] Lab ( ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 ma.
In-situ [ ] Lab [xr]
Interior gamma is < 20 /jR/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21.
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Decontamination and
Decommissioning Program
(Rev. 03/02/87).
[X]'
[ 1
[ ]
[ 3
t ]
[ 1
( ]
[ ]
( 1
[ 1
[ J [X]
(Vacant Lot)
[ 1 [X]
(Vacant Lot)
( ]
[X]
U.S. Department
of Energy (DOE)
YES NO NOT TAKEN
£X0 t ] t 1
t J ( J ty]£
[ ] [ )
M ^ M
COMMENTS: *The excavations were backfilled with materials that were measured
at the source showing that the Ra-226 concentrations are in the range of
normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
SFCERTIFED SFMS-00447
DOE ID NO. : MS- c/ 7
CHEM-NUCLEAR GEOTECH, INC., RECOMMENDATION
Based on the Chem-Nuclear Geotech, Inc., evaluation, I recommend this property
for:
[X] Certification by the Department of Energy.
( ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
arry A 7 Pepffy / '. Date
Decontamination and Decommissioning Program Manager
Chem-Nuclear Geotech, Inc.
2///M
DOE EVALUATION
Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental standards
were applied per 40 CFR 192.21.
-T ( z:o ( ?3.
Date .Decontamination and Decommissioning Program
Certification Official
Department of Energy
)0 0c£f?
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00447-VL
ADDRESS: 61 EAST FIRST SOUTH STREET
MONTICELLO, UTAH 84535
FEBRUARY 1993
Prepared for
Decontamination and Decommissioning Program
Division of Facilities and Site Decommissioning
Department of Energy
by
Chem-Nuclear Geotech, Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
\993 FEB
Harry'A. Perry*""
Program Manager
Chem-Nuclear Geotech, Inc., has been granted authorization to conduct remedial
action under the Decontamination and Decommissioning Program. Remedial action
was done in accordance with the Environmental Protection Agency Standards for
Cleanup of Lands and Buildings Contaminated with Residual Radioactive Material
from Inactive Uranium Processing Sites, 40 CFR 192.12, 192.20-23.
llllllllll
SFOCPLRPTS min
SFMS-09023
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
DOE ID NO.: HS-00447-VX
1.0 SUMMARY
1.1 Basis for Reaedial Action
The Monticello Vicinity Properties (MVP) project was accepted into
the Decontamination and Decommissioning Program with the primary
objective of reducing the potential hazard to the public due to
long-term exposure to low-level radioactivity associated with the
offsite mill tailings derived from the former U.S. Atomic Energy
Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to
provide additional sources of vanadium needed during World War II.
Various government agencies operated the mill until 1947. The AEC
obtained the mill in 1948 and operated it through 1959 under
cost-type contracts to provide both uranium and vanadium. Mill
operations were terminated on January 1, 1960.
The mill processed approximately one million tons of ore during the
AEC operations. Throughout the operating period, mill tailings from
the Monticello millsite were removed from the site and used for
construction-related activities in the vicinity.
1.2 Criteria for Remedial Action
The Decontamination and Decommissioning Program has adopted the
"Standards for Remedial Action at Inactive Uranium Processing Sites"
(40 CFR Part 192) for all cleanup activities under the MVP project.
These standards were prepared by the U.S. Environmental Protection
Agency (EPA) to establish guidelines for the control of tailings
piles and the cleanup of buildings and open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding
the EPA standards. The Remedial Action Contractor was notified of
the inclusion of this property into the Decontamination and
Decommissioning Program and was authorized by the DOE to conduct
remedial action as required to bring the property into conformance
with the EPA standards.
1
DOE ID NO.: MS-00447-VL
1.3 Summary of Remedial Action
DOE ID No.: MS-00447-VL
Legal Description:
Parcel No. M-189-1: beginning north 89 degrees 11 minutes west 154.5 feet
from the southeast corner of Lot 1, Block 23, Monticello Townsite Survey;
north 89 degrees 11 minutes west 149.5 feet, north 00 degrees 49 minutes
east 139.5 feet, south 89 degrees 11 minutes east 89.5 feet, north
00 degrees 49 minutes east 75 feet, south 89 degrees 11 minutes east
131.5 feet, south 00 degrees 49 minutes west 104.5 feet, north 89 degrees
11 minutes west 71.5 feet, south 00 degrees 49 minutes west 110 feet to
point of beginning, County of San Juan, State of Utah
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
61 East First South Street
Monticello, Utah 84535

Monticello, Utah 84535
Vacant Lot (VL)
Not applicable; inclusion recommended
by the Remedial Action Contractor
October 10, 1991
Chem-Nuclear Geotech, Inc.
December 30, 1991
Sonderegger Construction, Inc.
P.O. Box 6
Monticello, Utah
June 4, 1992
June 19, 1992
Interior: 0 cubic yards
Exterior: 1 cubic yard
2 square meters (m3)
February 1993
2
DOE ID NO.: MS-00447-VL
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual
radioactive material (Appendix Figure 2.1). Once excavation was
complete, the affected area was resurveyed for possible remaining
residual radioactive material and, upon attaining satisfactory
results, was backfilled with uncontaminated material. The property
was restored to a condition comparable to that which existed prior
to remedial action activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified 1 cubic yard of
contamination, 12 inches deep, within the property. The remedial
action process included the removal of approximately 1 cubic yard of
residual radioactive material, 6 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00447-VL
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Reaedial Action Survey
A radiological survey was conducted by Chem-Nuclear
Geotech, Inc., during October 1990, as described in the final
REA dated December 1991. Appendix Figure 2.1 shows the
extent of assessed contamination and identifies the area
recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted
after the removal of residual radioactive material and prior
to backfilling. Following the gamma scan, an individual soil
sample collected at grid coordinates 278377 represented the
6-inch-thick soil layer at the bottom of the excavation.
Exterior Findings: Surface exposure-rate values, determined
during the gamma scan, ranged from 12 microroentgens per
hour (uR/h) to 18 uR/h (Appendix Figure 2.1). The result of
analysis for radium-226 in one individual soil sample was
2.8 picocuries per gram (pCi/g), as indicated in Appendix
Table 3.1.
4
DOE ID NO.: MS-00447-VL
3.2 Recoaaendation for Certification
Residual radioactive materials have been removed from this property
to the extent required by the EPA standards (40 CFR 192.12,
192.20-23), as indicated in the Certification Data Summary below.
Therefore, the property located at 61 East First South Street, in
Monticello, Utah, is recommended for certification as required by
the Decontamination and Decommissioning Program guidelines, and the
appropriate records should be documented.
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentrat ion:
Certification Data Summary
Standards
Shall not exceed 20 uR/h
above background.
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Results
Not applicable:
vacant lot.
Not applicable:
vacant lot.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background* in
the 15-cm surface layer,
averaged over 100 m3.
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below the
surface, averaged over
100 m3.
< 5 pCi/g above
background.
Soil sample result was
2.6 pCi/g.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00447-VL
APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00447-VL
Address: 61 East First South Street, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range (juR/h) Ticket No. Method* (pCi/g)
V-l** 15 - 18 NAN 608 OCS 2.8
See Appendix Figure 2.1 for the verification area.
*OCS = Opposed Crystal System
••Individual soil sample collected at grid coordinates 278377.
MM-VPF:01-13-93
MS-00447.VL WS
REV052592
• *
10 12 16 14 18 24 26 20 22 32 34 38 40 46 28 42 48 30 60 + 42
40 40
38 38
X 36 36
v-i
IS-1B
34 34
14-17
32 32
30 30
14-17
28 28 IN i*R/h AL.
® ASSESSES AREA IDENTIFIER
AVERAGE. DEPTH OF ASSESSED
CONTAMIN,
CuNTAMI NATION
PT/.Yl
|Y.\vj 26 . AREA OF ASSESSED AMINATION 26
POST-REMEDIAL ACTEON EXPOSURE-RATE
BO!aNDAl|rOFEXCAvkT(ON
AVERAGE: EXCAVATED DEPTH FOR THE DEP
^SHEDc 12-15
12.-1;
EH-DEPOSIT OF 24 24
VERIFICATION
AND EXCAVAT
v-i DENTIf IER
i RANGE— U-17
14-17
22 22
20 20
18 18
16 16 JICAL AS-BUILT
FIGURE 2.1"
RADIOLOGICA EAST FIRST SOUTH STREET
EXTERIOR EXTENT OF CONTAMINATION
14 14
SCALE IN FEET
12 81 EAST
MONTICELLO. UTAH 12 rr
1.9 .9. 23
NpRTH
00447-V1^,1 ,1
14 46 48 10 12 16 20 22 24 42 44 50 34 36 40 26 28 30 32
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS. INC.
GRAND JUNCTION OFFICE
P. 0. BOX 2567
GRAND JUNCTION. COLORADO 81502
APR 2 9 1993
Jacob V. Gatrell
-Office of Environmental Restoration
Southwestern Area Programs Division
U.S. Department of Energy
EM-451/GTN/D-247
Washington, DC 20545
Dear Mr. Gatrell:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987). This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the ^Ra concentration in the soil.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Mary^J. Wilson V
Pollutant Assessments Group
Location Number:
Location Address:
MS00447
61 East 1st South Street
Monticello. Utah 84535
Property Owner:

Monticello. Utah 84535
Attachments
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS, INC.
GRAND JUNCTION OFFICE
P. 0. BOX 2567
GRAND JUNCTION. COLORADO 81502
APR 2 9 1993
Jacob V. Gatrell
Office of Environmental Restoration
Southwestern Area Programs Division
U.S. Department of Energy
EM-451/GTN/D-247
Washington, DC 20545
Dear Mr. Gatrell:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Mary^J. Wilson *'
Pollutant Assessments Group
Location Number:
Location Address:
MS00447
61 East 1st South Street
Monticello. Utah 84535
Property Owner:

Monticello. Utah 84535
Attachments
HEALTH AND SAFETY RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
61 EAST 1ST SOUTH STREET
MONTICELLO, UTAH (MS00447)
S.K. Mather
April 1993
Work performed by the
POLLUTANT ASSESSMENTS GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from 61 East 1st South Street,
Monticello, Utah (MS00447) 5
v
ACKNOWI£LXJMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge G. A. Pierce for analysis of soil samples and A. R. Jones and G. K. Stowe
for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1992, RUST Geotech Inc., the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at 61 East
1st South Street, Monticello, Utah. The Pollutant Assessments Group (PAG) of
Oak Ridge National Laboratory was assigned the responsibility of verifying the
data supporting the adequacy of remedial action and confirming the site's
compliance with DOE guidelines. The PAG found that the site successfully meets
the DOE remedial action objectives. Procedures used by the PAG are described
in the Pollutant Assessments Group Procedures Manual (ORNL, 1992).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT 61 EAST 1ST SOUTH STREET
MONTICELLO, UTAH (MS00447)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the US. government through the
Defense Plant Corporation to provide vanadium during World War II. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Pollutant Assessments
Group of the Health and Safety Research Division at Oak Ridge National Laboratory under DOE
contract DE-AC05-84OR21400 with Martin Marietta Energy Systems, Inc.
2
During 1992, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a vacant lot located at 61 East 1st South Street, Monticello, Utah. The
remedial action plan required excavation of all exterior contamination. When the
excavation was completed, the property was resurveyed, including soil sampling, to ensure
the removal of all contamination, backfilled with uncontaminated material, and restored to
a condition comparable to that which existed prior to remedial action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Pollutant Assessments Group (PAG) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the 61 East 1st
South Street site. This report describes the methods and results of that verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 1 yd3 of mill tailings
12 inches deep. However, during the actual removal process, a total of 1 yd3 of
contaminated earth and uranium mill tailings, 6 inches deep were removed from a 2 m2
area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of a gamma scan of the exterior and soil sampling.
A sample representative of the bottom 15-cm (6-in.) soil layer of one excavated area was
collected and blended to form a representative composite soil sample for the verification
area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Exterior surface gamma measurements taken from the excavated areas prior to
backfilling ranged from 12 to 18 fjR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected a soil sample representative of the excavated
areas from the bottom 15-cm (6-in.) soil layer. This sample was blended to form a
composite soil sample representative of an average over the one exterior verification area.
Geotech's analysis of these samples showed a ^Ra concentrations of 2.8 pCi/g in the
composite sample. ORNL PAG obtained this soil sample and performed a confirmatory
analysis, which showed a ^Ra concentration of 1.4 pCi/g. These values are below the
DOE guideline value of 15 pCi/g for soil layers >15 cm below the surface (Table 1).
Results of Geotech and ORNL soil sample analyses are given in Table 2.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
(DOE 1990)
5
Table 2. Results of ORNL analysis of Geotech soil samples
from 61 East 1st South Street, Monticello Utah (MS00447)
^Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No.a No.* (cm)
XI NAN-608 15-30 1.4 2.8
" An X-type sample is a split of the sample taken by the remedial action contractor.
* Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
REFERENCES
Abramiuk L N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00447, Address: 61 East 1st South Street, Monticello,
Utah 84535, Geotech, Grand Junction, Colorado, February 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1992. Pollutant Assessments Group Procedures Manual ORNLyTM-
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
1
TATs ptoe. rtcJd /Z.//W97
DOE ID NO. : MS- dO^l/Slo "\ A .
Property Address: ^Cs t=A5>T Gt=A>~g/2. ^iXgg"
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
Chem-Nuclear Geotech, Inc. of Energy (DOE)
YES NO NOT TAKEN YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 mJ.
In-situ [ ] Lab fX}
Interior gamma is < 20 fjR/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21.
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Decontamination and
Decommissioning Program
(Rev. 03/02/87).
COMMENTS: *The excavations were backfilled with materials that were measured
at the source showing that the Ra-226 concentrations are in the range of
normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
SFCFRT1FFD ccMC.QQ/mfi
[X]* [ ] [ ] LX], ( ) ( ]
( J [ ] [X] [ ] [ ] [>L
(Vacant Lot)
t ] [ ] tX) ( ] [ ] -
(Vacant Lot)
IZ/I*/<?7
DOE ID NO : MS- OOA-% ~ VL
CHEM-NUCLEAR GEOTECH, INC., RECOMMENDATION
Based on the Chem-Nuclear Geotech, Inc., evaluation, I recommend this property
for:
[X] Certification by the Department of Energy.
( ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
farry A. Perry
Decontamination and Decommissioning Program Manager
Chem-Nuclear Geotech, Inc.
Date
DOE EVALUATION
p>-3 Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental standards
were applied per 40 CFR 192.21.
Decontamination and Decommj.ssa.onmg Program
Certification Official
Department of Energy
•7f-Z.of?l
Date
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00456-VL
ADDRESS: 80 EAST CENTER STREET
MONTICELLO, UTAH 84535
FEBRUARY 1993
Prepared for
Decontamination and Decommissioning Program
Division of Facilities and Site Decommissioning
Department of Energy
mm by
Chem-Nuclear Geotech, Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
FEB ^9 1993
RECORDS MANAG&f
Harry^T. Perry''
Program Manager
Chem-Nuclear Geotech, Inc., has been granted authorization to conduct remedial
action under the Decontamination and Decommissioning Program. Remedial action
was done in accordance with the Environmental Protection Agency Standards for
Cleanup of Lands and Buildings Contaminated with Residual Radioactive Material
from Inactive Uranium Processing Sites, 40 CFR 192.12, 192.20-23.
Minium iinpiuiii
SFOCPLRPTS SFMS-09023
TABLE OF CONTENTS
Section Paoe
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
i
DOE ID NO.: MS-00456-VL
1.0 SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) project was accepted into
the Decontamination and Decommissioning Program with the primary
objective of reducing the potential hazard to the public due to
long-term exposure to low-level radioactivity associated with the
offsite mill tailings derived from the former U.S. Atomic Energy
Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to
provide additional sources of vanadium needed during World War II.
Various government agencies operated the mill until 1947. The AEC
obtained the mill in 1948 and operated it through 1959 under
cost-type contracts to provide both uranium and vanadium. Mill
operations were terminated on January 1, 1960.
The mill processed approximately one million tons of ore during the
AEC operations. Throughout the operating period, mill tailings from
the Monticello millsite were removed from the site and used for
construction-related activities in the vicinity.
1.2 Criteria for Remedial Action
The Decontamination and Decommissioning Program has adopted the
"Standards for Remedial Action at Inactive Uranium Processing Sites"
(40 CFR Part 192) for all cleanup activities under the MVP project.
These standards were prepared by the U.S. Environmental Protection
Agency (EPA) to establish guidelines for the control of tailings
piles and the cleanup of buildings and open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding
the EPA standards. The Remedial Action Contractor was notified of
the inclusion of this property into the Decontamination and
Decommissioning Program and was authorized by the DOE to conduct
remedial action as required to bring the property into conformance
with the EPA standards.
1
DOE ID NO.: MS-00456-VL
1.3 Stuurj of Reaedial Action
DOE ID No.:
Legal Description:
Parcel No. M-194: beginning
Monticello Townsite Survey,
194.5 feet, east 50 feet to
State of Utah
MS-00456-VL
at the northeast corner of Lot 3, Block 23,
south 194.5 feet, west 50 feet, north
the point of beginning, County of San Juan,
Property Address:
Property Owners:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
80 East Center Street
Monticello, Utah 84535

Monticello, Utah 84535
Vacant Lot (VL)
Not applicable; inclusion recommended
by the Remedial Action Contractor
October 10, 1991
Chem-Nuclear Geotech, Inc.
December 30, 1991
Sonderegger Construction, Inc.
P.O. Box 6
Monticello, Utah
June 4, 1992
June 19, 1992
Interior: 0 cubic yards
Exterior: 3 cubic yards
12 square meters (m3)
February 1993
2
DOE ID NO.: MS-00456-VL
2.0 OPERATIONS SUNMART
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual
radioactive material (Appendix Figure 2.1). Once excavation was
complete, the affected areas were resurveyed for possible remaining
residual radioactive material and, upon attaining satisfactory
results, were backfilled with uncontaminated material. The property
was restored to a condition comparable to that which existed prior
to remedial action activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified 1 cubic yard of
contamination, ranging from 12 inches to 18 inches deep, within the
property. The remedial action process included the removal of
approximately 3 cubic yards of residual radioactive material,
6 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00456-VL
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by Chem-Nuclear
Geotech, Inc., during October 1990, as described in the final
REA dated December 1991. Appendix Figure 2.1 shows the
extent of assessed contamination and identifies the areas
recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted
after the removal of residual radioactive material and prior
to backfilling. Following the gamma scan, soil samples
representative of the 6-inch-thick soil layer at the bottom
of the excavation were collected. These samples were blended
to form a composite sample representing the verification area
(Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined
during the gamma scan, ranged from 12 microroentgens per
hour (uR/h) to 20 uR/h (Appendix Figure 2.1). The result of
analysis for radium-226 in one composite soil sample was
2.7 picocuries per gram (pCi/g), as indicated in Appendix
Table 3.1.
4
DOE ID NO.: MS-00456-VL
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property
to the extent required by the EPA standards (40 CFR 192.12,
192.20-23), as indicated in the Certification Data Summary below.
Therefore, the property located at 80 East Center Street, in
Monticello, Utah, is recommended for certification as required by
the Decontamination and Decommissioning Program guidelines, and the
appropriate records should be documented.
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Certification Data Summary
Standards
Shall not exceed 20 uR/h
above background.
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Results
Not applicable:
vacant lot.
Not applicable:
vacant lot.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background* in
the 15-cm surface layer,
averaged over 100 m3.
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below the
surface, averaged over
100 m3.
< 5 pCi/g above
background.
Soil sample result was
2.7 pCi/g.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00456-VL
APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
Table 3.1
PoBt-Excavation Sample/Measurement Results
DOE ID No.: MS-00456-VL
Address: 80 East Center Street, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range (uR/h) Ticket No. Method* (pCi/g)
V-l 15 - 20 NAN 609 OCS 2.7
See Appendix Figure 2.1 for the verification area.
*OCS = Opposed Crystal System
MM-VPF:01-13-93
MS-00456.VL WS
REV052592
7
12 18 20 10 14 16 22 24 26 28 30 32 34 38 40 36 44 46 48 50 42 + 42 I I 1 1 1
40-40
EAST CENTER
OI
38
V 36
14-17
34
32
30
28
V-1
AS iESSE) AREA IDENTIFIER 15-20
DEPTH OF ASSESSED
ASSESSED CONTAMIN,
AVERAGE DEP1
AREA OF ASSE
CONTAMI4ATION
14-17 AMINATION. 26
12-15 EXPOSURE-RATE ACTION
OF VATION
ATED DEPTH FOR HE DEPOSIT OF 24
T.O^LEX»^TEDRE^R v-i
22
20
7
18
12-1
METAL SHED
16 AL AS
FIGURE'2"1
OF CONTAMINATION EXTERIOR
14
rs SCALE FEET
60 MONTICEULO. UTAH 12 US* 3i
4.0 20 10 0 20
NORTH
+ 22 38 42 44 46 4b 50 10 14 16 18 20 24 26 30 32 34 36 28
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS, INC.
GRAND JUNCTION OFFICE
P. 0. BOX 2567
GRAND JUNCTION. COLORADO 81502
APR 2 9 1993
Jacob W. Gatrell
Office of Environmental Restoration
Southwestern Area Programs Division
U.S. Department of Energy
EM-451/GTN/D-247
Washington, DC 20545
Dear Mr. Gatrell:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Mary^J. Wilson V '
Pollutant Assessments Group
Location Number:
Location Address:
MS00456
80 East Center Street
Monticello. Utah 84535

Property Owner:
Owner Address:
Attachments
HEALTH AND SAFETY RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
80 EAST CENTER STREET
MONTICELLO, UTAH (MS00456)
S.K. Mather
April 1993
Work performed by the
POLLUTANT ASSESSMENTS GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from 80 East Center Street,
Monticello, Utah (MS00456) 5
v
ACXNOWLETXJMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge G. A. Pierce for analysis of soil samples and A. R. Jones and G. R. Stowe
for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1992, RUST Geotech Inc., the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at 80 East
Center Street, Monticello, Utah. The Pollutant Assessments Group (PAG) of
Oak Ridge National Laboratory was assigned the responsibility of verifying the
data supporting the adequacy of remedial action and confirming the site's
compliance with DOE guidelines. The PAG found that the site successfully meets
the DOE remedial action objectives. Procedures used by the PAG are described
in the Pollutant Assessments Group Procedures Manual (ORNL, 1992).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT 80 EAST CENTER STREET
MONTICELLO, UTAH (MS00456)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War II. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the US. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Pollutant Assessments
Group of the Health and Safety Research Division at Oak Ridge National Laboratory under DOE
contract DE-AC05-84OR21400 with Martin Marietta Energy Systems, Inc.
2
During 1992, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a vacant lot located at 80 East Center Street, Monticello, Utah. The
remedial action plan required excavation of all exterior contamination. When the
excavation was completed, the property was resurveyed, including soil sampling, to ensure
the removal of all contamination, backfilled with uncontaminated material, and restored to
a condition comparable to that which existed prior to remedial action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Pollutant Assessments Group (PAG) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the 80 East Center
Street site. This report describes the methods and results of that verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 1 yd3 of mill tailings
12 to 18 inches deep. However, during the actual removal process, a total of 3 yd3 of
contaminated earth and uranium mill tailings, 6 inches deep were removed from a 12 m2
area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of a gamma scan of the exterior and soil sampling.
A sample representative of the bottom 15-cm (6-in.) soil layer of one excavated area was
collected and blended to form representative composite soil samples for the verification
area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Exterior surface gamma measurements taken from the excavated areas prior to
backfilling ranged from 12 to 20 /zR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected a soil sample representative of the excavated
area from the bottom 15-cm (6-in.) soil layers. This sample was blended to form a
composite soil sample representative of an average over the exterior verification area.
Geotech's analysis of this sample showed 226Ra concentrations of 2.7 pCi/g in the
composite sample. ORNL PAG obtained this soil sample and performed a confirmatory
analysis, which showed ^Ra concentration of 1.7 pCi/g. This value is below the DOE
guideline value of 15 pCi/g for soil layers >15 cm below the surface (Table 1). Results of
Geotech and ORNL soil sample analyses are given in Table 2.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
(DOE 1990)
5
Table 2. Results of ORNL analysis of Geotech soil samples
from 80 East Center Street, Monticello Utah (MS00456)
226Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No.' (cm)
XI NAN-609 15-30 1.7 2.7
An X-type sample is a split of the sample taken by the remedial action contractor.
h Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
REFERENCES
Abramiuk I. N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00456, Address: 80 East Center Street, Monticello, Utah
84535, Geotech, Grand Junction, Colorado, February 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C
ORNL, 1992. Pollutant Assessments Group Procedures Manual ORNL/TM-
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
"Dii's f*y«- rcc'd /z.^
DOE ID NO. : MS- frbHS9-\/L
Property Address: M OJP-kST(L(L ST£.££7
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
Chem-Nuclear Geotech, Inc. of Energy (DOE)
YES NO NOT TAKEN YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab ( ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2.
In-situ ( ] Lab [><}
Interior gamma is < 20 uR/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21.
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Decontamination and
Decommissioning Program
(Rev. 03/02/87).
COMMENTS: *The excavations were backfilled with materials that were measured
at the source showing that the Ra-226 concentrations are in the range of
normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
[X]* [ ] [ ] CXI L El I )
1*1 ( J [ 1 IVh t 1 M
t ] t ) [X] C ] [ ] [X]
(Vacant Lot)
t ] [ 1 [X] [ 1 [ ] [XI
(Vacant Lot)
[ ] [XT [ ] 1 1 IX1> 1 1
3t^
SFCERT1FED SFMS-00459
12
DOE I DNO.: MS— OQA^I -
CHEM-NUCLEAR GEOTECH, INC., RECOMMENDATION
Based on the Chem-Nuclear Geotech, Inc., evaluation, I recommend this property
for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
3arry A. Pe^ry7
Decontamination and Decommissioning Program Manager
Chem-Nuclear Geotech, Inc.
Date
DOE EVALUATION
(XI Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental standards
were applied per 40 CFR 192.21.
Decontamination and Decommissioning Program
Certification Official
Department of Energy
"7 / ^frZ
Date
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00459-VL
ADDRESS: 64 EAST CENTER STREET
MONTICELLO, UTAH 84535
FEBRUARY 1993
Prepared for
Decontamination and Decommissioning Program
Division of Facilities and Site Decommissioning
Department of Energy
FEB 1993
by
Chem-Nuclear Geotech, Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
i1-*f <n *«/^*"nn •ij-rf4
Harry A. Perry
Program Manager
Chem-Nuclear Geotech, Inc., has been granted authorization to conduct remedial
action under the Decontamination and Decommissioning Program. Remedial action
was done in accordance with the Environmental Protection Agency Standards for
Cleanup of Lands and Buildings Contaminated with Residual Radioactive Material
from Inactive Uranium Processing Sites, 40 CFR 192.12, 192.20-23.
Ililllllllll
SFOCPLRPTS mini
SFMS-09023
MAR 19 1993
RECORDS MANAG&T
TABLE OF CONTENTS
Section E&SS.
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
i
DOE ID NO.: MS-00459-VL
1.0 SUNMART
1.1 Baal* for Remedial Action
The Monticello Vicinity Properties (MVP) project was accepted into
the Decontamination and Decommissioning Program with the primary
objective of reducing the potential hazard to the public due to
long-term exposure to low-level radioactivity associated with the
offsite mill tailings derived from the former U.S. Atomic Energy
Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to
provide additional sources of vanadium needed during World War II.
Various government agencies operated the mill until 1947. The AEC
obtained the mill in 1948 and operated it through 1959 under
cost-type contracts to provide both uranium and vanadium. Mill
operations were terminated on January 1, 1960.
The mill processed approximately one million tons of ore during the
AEC operations. Throughout the operating period, mill tailings from
the Monticello millsite were removed from the site and used for
construction-related activities in the vicinity.
1.2 Criteria for Remedial Action
The Decontamination and Decommissioning Program has adopted the
"Standards for Remedial Action at Inactive Uranium Processing Sites"
(40 CFR Part 192) for all cleanup activities under the MVP project.
These standards were prepared by the U.S. Environmental Protection
Agency (EPA) to establish guidelines for the control of tailings
piles and the cleanup of buildings and open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding
the EPA standards. The Remedial Action Contractor was notified of
the inclusion of this property into the Decontamination and
Decommissioning Program and was authorized by the DOE to conduct
remedial action as required to bring the property into conformance
with the EPA standards.
1
DOE ID NO.: MS-00459-VL
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
MS-00459-VL
Parcel No. M-195: Lot 4, Block 23, Monticello Townsite Survey, Plat A,
except the following: beginning at the northeast corner of said Block 23,
south 170 feet, west 55 feet, north 170 feet, east 55 feet to the point
of beginning, County of San Juan, State of Utah
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
64 East Center Street
Monticello, Utah 84535

Monticello, Utah 84535
Vacant Lot (VL)
Not applicable; inclusion recommended
by the Remedial Action Contractor
October 10, 1991
Chem-Nuclear Geotech, Inc.
December 30, 1991
Sonderegger Construction, Inc.
P.O. Box 6
Monticello, Utah
June 4, 1992
June 19, 1992
Interior: 0 cubic yards
Exterior: 3 cubic yards
14 square meters (m2)
February 1993
2
DOE ID NO.: MS-00459-VL
2.0 OPERATIONS SUNMART
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual
radioactive material (Appendix Figure 2.1). Once excavation was
complete, the affected areas were resurveyed for possible remaining
residual radioactive material and, upon attaining satisfactory
results, were backfilled with uncontaminated material. The property
was restored to a condition comparable to that which existed prior
to remedial action activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified 3 cubic yards of
contamination, ranging from 6 inches to 15 inches deep, within the
property. The remedial action process included the removal of
approximately 3 cubic yards of residual radioactive material,
6 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00459-VL
3.0 VERIFICATION SUNMART
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by Chem-Nuclear
Geotech, Inc., during October 1990, as described in the final
REA dated December 1991. Appendix Figure 2.1 shows the
extent of assessed contamination and identifies the areas
recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted
after the removal of residual radioactive material and prior
to backfilling. Following the gamma scan, soil samples
representative of the 6-inch-thick soil layer at the bottom
of the excavation were collected. These samples were blended
to form a composite sample representing the verification area
(Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined
during the gamma scan, ranged from 14 microroentgens per
hour (uR/h) to 18 uR/h (Appendix Figure 2.1). The result of
analysis for radium-226 in one composite soil sample was
3.1 picocuries per gram (pCi/g), as indicated in Appendix
Table 3.1.
4
DOE ID NO.: MS-00459-VL
3.2 Rec ndation for Certification
Residual radioactive materials have been removed from this property
to the extent required by the EPA standards (40 CFR 192.12,
192.20-23), as indicated in the Certification Data Summary below.
Therefore, the property located at 64 East Center Street, in
Monticello, Utah, is recommended for certification as required by
the Decontamination and Decommissioning Program guidelines, and the
appropriate records should be documented.
Applicability
Certification Data Summary
Standards Survey Results
Habitable Structures
Exposure Rate: Shall not exceed 20 uR/h
above background.
Not applicable:
vacant lot.
Radon Decay-Product
Concentration:
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Not applicable:
vacant lot.
Land
Radium-226 Concentration
in Surface Soil:
Shall not exceed 5 pCi/g
above background* in
the 15-cm surface layer,
averaged over 100 m2.
< 5 pCi/g above
background.
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below the
surface, averaged over
100 m2.
Soil sample result was
3.1 pCi/g.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00459-VL
APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
Table 3.1
Poet-Excavation Sample/Measurement Results
DOE ID No.: MS-00459-VL
Address: 64 East Center Street, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range (uR/h) Ticket No. Method* (pCi/g)
V-l 15 - 18 NAN 607 OCS 3.1
See Appendix Figure 2.1 for the verification area.
*OCS = Opposed Crystal System
MM-VPF:01-13-93
MS-00459.VL WS
REV052592
7
42
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
12 14 16 16 20 22
~! !—! ! ! !—r—n—r
24 26 28 30
~! ! !—I—I—I—r
32 34 36
1—! n—r
38 4Q 42
~i—!—i—i n~~
44
EAST CENTER STREET•
! /// : I i i j_ j
-14-17
i....
•••I
V-1 14-17 15-18
•••I
...i.
V-l •••I
15-18
0 15
14-17
2-15
12
114-17
V-1
8-17
i
• -14-17 14-17
I i
rs
46 48
~l 1 1 1
•i i i-
'•I I
•I I
•I I
0£GJIHQ
ALL DEPTHS IN; INCHES j
ALL EXPOSURE;RATE? IN pR/h
ASSESSEb AREA IDENTIFIER!
AVERAGE! DEPTH OF ASSESSED CONTAMINATION
. AREA OFASSESSED CONTAMINATION j j
POjST-REMEDIAt ACTION EXPOSURE-RATE RAN
' BojuNDAtiY' OF EXCAVATION ' IIj!
i i
i i
i i
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT:
•CONTAMINATION
VERIFICATION SOIL SAMPLE:AREA IDENTIFIER...!
ANO EXCAVATION EXPOSURE-RATE RANGE
RAdlOLObrCAtAS Btnd
"|'-FIGURE 2.1"??j
! EXTERIOR lEXTENT OF CONTAMINATION
MltOfNCl-M. W &CCU»A»TI
SCALE IN FEET
,;...2Q..;...1.ft..;....p...: L.2Q..I I..40.. 'NORTH"
THIS ORAW1HO. PREPARED fOR THC: DECONTAMINATION AND
pCCOMMSSIONINC PROGRAM. 13 FOR THC SOLE USE OF THC
..U.S. DEPARTMENT OF ENERGY ANO ITS CONTRACTORS. (T IS..
NOT A LutO SURVEY PLAT; UTILITY LOCATION PLAT, OR OTHER:
IMPROVEMENT SURVEY PUT AND * NOT TO tt RELIES UPON '
FOR THE:ESTABLISHMENT OF FENCE. SUIL01NO. OR OTHER
,.FUTURE.fcPRqVE.MENT LINES, j |
J L
RU004SIV 01/lt/U TUt
J i i L
12 14
i i i i I I i » J L J L
kdk.UUMl-iUk.HmiJ'Ur-
mlTllUMINT NO. iMMrtTON '
16 18 20 22 24 26 28 30 32 34 36
J L
tlHI '
•f CC A.*. AM MO.
U.S. DEPARTMENT OF ENERGY
QUMO JUNCTION MOJKCTS Off ICE, COLOAAOO
MtkHfTIO'
w
64 EAST CENTER STREI
MONTICELLO. UTAH
INHBvC IO.TI |....<IMI BH
im it us—
Q«oUch, Inc.
38 40 42 44 46
5^1 1....1
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS. INC.
GRAND JUNCTION OFFICE
P. 0. BOX 2567
GRAND JUNCTION. COLORADO 81502
APR 2 9 1993
Jacob W. Gatrell
Office of Environmental Restoration
Southwestern Area Programs Division
U.S. Department of Energy
EM-451/GTN/D-247
Washington, DC 20545
Dear Mr. Gatrell:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Mary J. Wilsorf
Pollutant Assessments Group
Location Number: MS00459
Location Address: 64 East Center Street
Monticello. Utah 84535
Property Owner:

Attachments
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS, INC.
GRAND JUNCTION OFFICE
P. 0. BOX 2567
GRAND JUNCTION. COLORADO 81502
APR 2 9 1993
Jacob W. Gatrell
Office of Environmental Restoration
Southwestern Area Programs Division
U.S. Department of Energy
EM-451/GTN/D-247
Washington, DC 20545
Dear Mr. Gatrell:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Mary J. Wilsori
Pollutant Assessments Group
Location Number:
Location Address:
MS00459
64 East Center Street
Monticello. Utah 84535
Property Owner:
Owner Address:

Attachments
HEALTH AND SAFETY RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
64 EAST CENTER STREET
MONTICELLO, UTAH (MS00459)
S.K. Mather
April 1993
Work performed by the
POLLUTANT ASSESSMENTS GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
UST OF TABLES v
ACKN O WLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from 64 East Center Street,
Monticello, Utah (MS00459) 5
v
ACXNOWI£LX3MENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge G. A. Pierce for analysis of soil samples and A. R. Jones and G. K. Stowe
for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1992, RUST Geotech Inc., the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at 64 East
Center Street, Monticello, Utah. The Pollutant Assessments Group (PAG) of
Oak Ridge National Laboratory was assigned the responsibility of verifying the
data supporting the adequacy of remedial action and confirming the site's
compliance with DOE guidelines. The PAG found that the site successfully meets
the DOE remedial action objectives. Procedures used by the PAG are described
in the Pollutant Assessments Group Procedures Manual (ORNL, 1992).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT 64 EAST CENTER STREET
MONTICELLO, UTAH (MS00459)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War IL Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Pollutant Assessments
Group of the Health and Safety Research Division at Oak Ridge National Laboratory under DOE
contract DE-AC05-84OR21400 with Martin Marietta Energy Systems, Inc
2
During 1992, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a vacant lot located at 64 East Center Street, Monticello, Utah. The
remedial action plan required excavation of all exterior contamination. When the
excavation was completed, the property was resurveyed, including soil sampling, to ensure
the removal of all contamination, backfilled with uncontaminated material, and restored to
a condition comparable to that which existed prior to remedial action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Pollutant Assessments Group (PAG) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the 64 East Center
Street site. This report describes the methods and results of that verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 3 yd3 of mill tailings
6 to 15 inches deep. However, during the actual removal process, a total of 3 yd3 of
contaminated earth and uranium mill tailings, 6 inches deep were removed from a 14 m2
area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of a gamma scan of the exterior and soil sampling.
A sample representative of the bottom 15-cm (6-in.) soil layers of one excavated area was
collected and blended to form a representative composite soil sample for the verification
area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Exterior surface gamma measurements taken from the excavated areas prior to
backfilling ranged from 14 to 18 /iR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected a soil sample representative of the excavated
area from the bottom 15-cm (6-in.) soil layers. This sample was blended to form a
composite soil sample representative of an average over the single exterior verification
areas. Geotech's analysis of this sample showed ^Ra concentrations of 3.1 pCi/g in the
composite sample. ORNL PAG obtained this soil sample and performed a confirmatory
analysis, which showed 226Ra concentrations of 2.6 pCi/g. These values are below the
DOE guideline value of 15 pCi/g for soil layers >15 cm below the surface (Table 1).
Results of Geotech and ORNL soil sample analyses are given in Table 2.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con- Maximum permissible con- 5 pCi/g averaged over the
centrations in soil centration of ^Ra in soil first 15 cm of soil below the
above background levels, surface; 15 pCi/g when ave-
averaged over a 100-m2 area raged over 15-cm-thick soil
layers more than 15 cm
below the surface
(DOE 1990)
5
Table 2. Results of ORNL analysis of Geotech soil samples
from 64 East Center Street, Monticello Utah (MS00459)
226Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No* (cm)
XI NAN-607 15-30 2.6 3.1
" An X-type sample is a split of the sample taken by the remedial action contractor.
* Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
REFERENCES
Abramiuk L N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00459, Address: 64 East Center Street, Monticello, Utah
84535, Geotech, Grand Junction, Colorado, February 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1992. Pollutant Assessments Group Procedures Manual ORNL/TM-
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
DOE ID NO.: MS-00689-VL
Property Address: Parcel No. A00200000130, Meadowlark Lane
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
RUST Geotech Inc. of Energy (DOE)
YES NO NOT TAKEN YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2.
In-situ [ ] Lab [X]
Interior gamma is < 20 //R/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21.
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Environmental Restoration
Program (Rev. 03/02/87).
[X]* [ ] [ ]
[X] [ ] [ ]
[ ] [ ] [X]
(Vacant Lot)
[ ] [X] [ ]
[ ] [ ]
L*l [ ]
[ ] [ 1
[ ]
IM
[ ] I ] [X] [ ] [ ] [A
(Vacant Lot)
[ i iy\ I ]
MM IX] [ ] I ] M
COMMENTS: #The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
SFCERTI FED 1111111111
SFMS-09030
DOE ID NO.: MS-00689-VL
RUST GEOTECH INC. RECOMMENDATION
Based on the RUST Geotech Inc. evaluation, I recommend this property for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
[A] Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental
standards were applied per 40 CFR 192.21.
Program Manager
RUST Geotech Inc.
Date
DOE EVALUATION
Date
Certification Official
Department of Energy
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00689-VL
ADDRESS: PARCEL NO. A00200000130
MEADOWLARK LANE
MONTICELLO, UTAH 84535
DECEMBER 1993
Prepared for
Environmental Restoration Program
Department of Energy
by
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
<£4
Harr Perry A.
Program Manager
RUST Geotech Inc. has been granted authorization to conduct remedial action under
the Environmental Restoration Program. Remedial action was done in accordance
with the U.S. Environmental Protection Agency "Standards for Cleanup of Land and
Buildings Contaminated with Residual Radioactive Materials from Inactive Uranium
Processing Sites," 40 CFR 192.12, 192.20-23.
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
i
DOE ID NO.: MS-00689-VL
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Environmental Restoration Program with the primary objective of
reducing the potential hazard to the public due to long-term exposure to
low-level radioactivity associated with the offsite mill tailings derived from
the former U.S. Atomic Energy Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to provide
additional sources of vanadium needed during World War II. Various
government agencies operated the mill until 1947. The AEC obtained the
mill in 1948 and operated it through 1959 under cost-type contracts to
provide both uranium and vanadium. Mill operations were terminated on
January 1, 1960.
The mill processed approximately one million tons of ore during the AEC
operations. Throughout the operating period, mill tailings from the
Monticello millsite were removed from the site and used for construction-
related activities in the vicinity.
1.2 Criteria for Remedial Action
The Environmental Restoration Program adopted the "Standards for
Remedial Actions at Inactive Uranium Processing Sites" (40 CFR Part 192)
for all cleanup activities under the MVP Project. These standards were
prepared by the U.S. Environmental Protection Agency (EPA) to establish
guidelines for the control of tailings piles and the cleanup of buildings and
open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the EPA
standards. The Remedial Action Contractor was notified of the inclusion
of this property into the Environmental Restoration Program and was
authorized by the DOE to conduct remedial action as required to bring the
property into conformance with the EPA standards.
1
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
DOE ID NO.: MS-00689-VL
MS-00689-VL
Lot 13, Meadowlark Acres Subdivision, City
of Monticello, County of San Juan, State of
Utah
Parcel No. A00200000130
Meadowlark Lane
Monticello, Utah 84535

Vacant Lot (VL)
Not applicable; inclusion requested by
the Remedial Action Contractor
December 31, 1991
RUST Geotech Inc.
July 27, 1992
Crowley Construction
East Route
Monticello, Utah
May 25, 1993
July 19, 1993
Interior: 0 cubic yards
Exterior: 247 cubic yards
751 square meters (m2)
December 1993
2
DOE ID NO.: MS-00689-VL
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual radioactive
material (Appendix Figure 2.1). Once excavation was complete, the
affected areas were resurveyed for possible remaining residual radioactive
material and, upon attaining satisfactory results, were backfilled with
uncontaminated material. The property was restored to a physical
condition comparable to that which existed prior to remedial action
activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified contamination, 6 inches deep,
within the property. The remedial action process included the removal of
approximately 247 cubic yards of residual radioactive material, ranging
from 6 inches to 20 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00689-VL
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by RUST Geotech Inc. during
May 1991, as described in the final REA dated July 1992.
Appendix Figure 2.1 shows the extent of assessed contamination
and identifies the areas recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to backfilling.
Following the gamma scan, soil samples representative of the
6-inch-thick soil layer at the bottom of the excavation were
collected. These samples were blended to form composite
samples representing the verification areas (Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 13 microroentgens per hour (//R/h)
to 23 //R/h (Appendix Figure 2.1). The results of analyses for
radium-226 in eight composite soil samples ranged from
1.3 picocuries per gram (pCi/g) to 4.0 pCi/g (Appendix Table 3.1).
4
DOE ID NO.: MS-00689-VL
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by the EPA standards (40 CFR 192.12, 192.20-23),
as indicated in the Certification Data Summary below.
Therefore, the property located at Parcel No. A00200000130,
Meadowlark Lane, in Monticello, Utah, is recommended for certification
as required by the Environmental Restoration Program guidelines, and
the appropriate records should be documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Standards
Shall not exceed 20 //R/h
above background.
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Results
Not applicable:
vacant lot.
Not applicable:
vacant lot.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background* in the
15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below
the surface, averaged
over 100 m2.
< 5 pCi/g above
background.
Soil sample results
ranged from 1.3 pCi/g
to 4.0 pCi/g.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00689-VL
4.0 APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
MM-KMA: 12-09-93
MS-00689.VL WP51
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00689-VL
Address: Parcel No. A00200000130, Meadowlark Lane, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range U/R/h) Ticket No. Method* (pCi/g)
V-l 13 - 19 NAY 648 OCS 2.3
V-2 14 - 23 NAY 641 OCS 3.0
V-3 13 - 21 NAY 642 OCS 4.0
V-4 13 - 18 NAY 643 OCS 2.9
V-5 13-16 NAY 644 OCS 3.0
V-6 13 - 18 NAY 645 OCS 1.3
V-7 14 - 18 NAY 646 OCS 3.9
V-8 13 - 21 NAY 647 OCS 2.2
See Appendix Figure 2.1 for the verification areas.
*OCS = Opposed Crystal System
7
10
30
12 1 4 1 6 18 20 22 24 26 28 30 32 34 36 38 40
30
28
26
24
22
20
18 -
16 -
MEADOWLARK LANE
///
::::©::::::rri:::::: V-8
6 . 13-21
20
7.|
V-7
V-1 14-18
13-19
13-16
V-6
13-18
\ K
V-4
13-18 x.v.v V-2 X V-3
V-5 14-23 :::\ 13-21
\ 13-16
Ld
< _)
or
<
o
Q <
L±J
O
to
i—
CO or
®
<D
rv/.vi
LV.-.vj
12-15
12
V-1
16-17
LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN /xR/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION - 22
- 20
RADIOLOGICAL AS-BUILT
1 4
12
Y
10
X
o
SCALE IN FEET
20 10 0 20
RM00689V 12/20/93 TMT/529
40
THIS DRAWING, PREPARED FOR THE ENVIRONMENTAL RESTORATION
PROGRAM, IS FOR THE SOLE USE OF THE U.S. DEPARTMENT OF
ENERGY AND ITS CONTRACTORS. IT IS NOT A LAND SURVEY PLAT,
UTILITY LOCATION PLAT. OR OTHER IMPROVEMENT SURVEY PLAT
AND IS NOT TO BE RELIED UPON FOR THE ESTABLISHMENT OF
FENCE, BUILDING, OR OTHER FUTURE IMPROVEMENT LINES.
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
RESIDENCE-NO. OF OCCUPANTS
NON-RESIOENCE-UAN-HRS./WK.
INSTRUMENT NO.
SURVEY OATE
VERIFICATION
A.E. APP. NO. DATE
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE, COLORADO
OATE
|«-T5
3L l2-«?3
PARCEL NO. A00200000130
MEADOWLARK LANE
MONTICELLO, UTAH
GEOTECH INC
DATE APPROVAL DOE
DOEIONO. MS-00689-VL
DWO.NO. 3-B00689-V1 SMT 1 „ 1
10 12 1 4 16 18 20 22 24 26 28 30 32 34 36 38 40
OAK RIDGE NATIONAL LABORATORY
MANAGED BY MARTIN MARIETTA ENERGY SYSTEMS, INC.
GRAND JUNCTION OFFICE
RO. BOX 2567
GRAND JUNCTION, COLORADO 81502
APR 2 8 1994
Donald N. Leske
Project Manager, Monticello Projects
U.S. Department of Energy
P. 0. Box 2567
Grand Junction, 81502
Dear Mr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil and exterior gamma exposure
rate at this property.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Gretchen A. Pierce
MVP/IVC Project Manager
Environmental Assessment Group
Location Number:
Location Address:
MS00689-VL
A00200000130/Meadowlark Lane
Monticello. Utah 84535
Property Owner:
Owner Address:

Tenant Name: Vacant lot
Attachments
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE B INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
A0fJ2ofJ0O)130/MEADOWLARK LANE
MONTICELLO, UTAH (MS00689-VL)
J. R. Sauvage
April 1994
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CXDNTENTS
LIST OF TABLES v
LIST OF FIGURES v
ACKNOWLEDGMENTS vii
ABSTRACT vii
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIHCATION OF REMEDIAL ACTION 3
GEOTECH SURVEY RESULTS 3
Gamma Measurements 3
Soil Sample Analysis 3
ORNL SURVEY RESULTS 6
Gamma Measurements 6
Soil Sample Analysis 6
CONCLUSION 6
REFERENCES 8
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL and Geotech analyses of soil samples from
A00200000130/Meadowlark Lane Monticello, Utah (MS00689-VL) 5
LIST OF FIGURES
1 Property Map 7
v
ACXNOWLEJDGMENTS
Research for this project was sponsored by the U.S. Department of Energy, Office of
Environmental Restoration, Southwestern Area Programs. The author wishes to
acknowledge T. L. Meyer for analysis of soil samples and A. R. Jones and G. A. Pierce for
technical reviews.
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was accepted
into the U.S. Department of Energy's (DOE's) Surplus Facilities Management Program,
with the objectives of restoring the government-owned mill site to safe levels of
radioactivity, disposing of or containing the tailings in an environmentally safe manner, and
performing remedial actions on off-site (vicinity) properties that had been contaminated by
radioactive material resulting from mill operations. During 1993, RUST Geotech Inc., the
remedial action contractor designated by DOE, performed remedial action on the vicinity
property at A00200000130/Meadowlark Lane, Monticello, Utah. The Environmental
Technology Section (ETS) of Oak Ridge National Laboratory was assigned the
responsibility of verifying the data supporting the adequacy of remedial action and
confirming the site's compliance with DOE guidelines. The ETS found that the site
successfully meets the DOE remedial action objectives. Procedures used by ETS are
described in the Environmental Technology Section Procedures Manual (ORNL, 1993).
vii
1
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT A00200000130/MEADOWLARK LANE
MONTICELLO, UTAH (MS00689-VL)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War II. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Environmental
Assessment Group in the Environmental Technology Section of the Health Sciences Research
Division at Oak Ridge National Laboratory under DOE contract DE-AC05-84OR21400 with Martin
Marietta Energy Systems, Inc.
2
During 1993, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a vacant lot located at A00200000130/Meadowlark Lane, Monticello, Utah.
The remedial action plan required excavation of all exterior contamination, backfilling with
uncontaminated material, and restoration to a condition comparable to that which existed
prior to remedial action (Geotech 1993). When the excavation stage was completed, the
property was resurveyed, including soil sampling, by Geotech and by an independent
contractor to verify the data supporting the adequacy of remedial action and to confirm
the site's compliance with DOE guidelines. The Environmental Technology Section
(ETS) of Oak Ridge National Laboratory (ORNL) has been designated the Independent
Verification Contractor for the A00200000130/Meadowlark Lane site. This report
describes the methods and results of the verification surveys.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 149 yd3 of mill
tailings 6 inches deep. However, during the actual removal process, a total of 247 yd3 of
contaminated earth and uranium mill tailings, 6 to 20 inches deep, were removed from a
751 m2 area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
GEOTECH SURVEY RESULTS
Gamma Measurements
Exterior surface gamma exposure rate measurements taken by Geotech from the
excavated areas prior to backfilling ranged from 13 to 23 uR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. These samples were blended to form a
composite soil sample representative of an average over the eight exterior verification
areas. Geotech's analysis of these samples showed ^Ra concentrations from 1.3 to
4.0 pCi/g in the composite sample. ORNL ETS obtained a percentage of these soil
samples and performed a confirmatory analysis, which showed ^Ra concentrations from
1.6 to 2.8 pCi/g, These values are below the DOE guideline value of 15 pCi/g for soil
layers >15 cm below the surface (Table 1). Results of Geotech and ORNL soil sample
analyses are given in Table 2.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to ^Rn Average annual radon proge- 0.03 WL
progeny ny concentration (including
background)
(DOE 1990)
5
Table 2. Results of ORNL and Geotech analyses of soil samples
from A00200fJ00130/Meadowlark Lane, Utah (MS00689-VL)
226Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth
No. No.6 (cm) Confirmatory' ORNL Geotech
V9* NAY 648 >15 4.1 2.3
V3d NAY 642 >15 4.1 4.0
V6d NAY 645 >15 2.9 1.3
V& NAY 647 >15 4.2 22
XI" NAY 648 >15 2.8 23
X5a NAY 644 >15 1.6 3.0
" An X-type sample is a split of the sample taken by the remedial action
contractor.
* Soil samples representative of the bottom 15-cm (6-in.) soil layers of the
excavated areas were taken by RUST Geotech Inc., and these samples were blended to
form composite soil samples, which represent an average over verification areas.
c ORNL performed analysis on aliquots of the composite samples taken by
Geotech (confirmatory).
d Composite samples collected by ORNL from approximately the same excavated
locations sampled by Geotech.
' ORNL's V9 is the same area identified by the RAC as VI.
6
ORNL SURVEY RESULTS
Gamma Measurements
Measurements taken by ORNL over the ground surface in the excavated areas prior
to backfilling ranged from 14 to 22 uR/h (Figure 1).
Soil Sample Analysis
ORNL sampled V3, V6, V8 and V9 of the excavated areas prior to backfilling,
collecting aliquots representative of those areas from the bottom 15-cm (6-in.) soil layers.
These samples were blended to form 4 composite soil samples representative of an
average over the exterior verification areas. ORNL's analysis of these composite samples
showed ^Ra concentrations of 2.9 and 4.2 pCi/g. These values are below the DOE
guideline value of 15 pCi/g for soil layers >15 cm below the surface (Table 1). Results of
ORNL sample analyses are given in Table 2.
CONCLUSION
The results of all Geotech and ORNL soil sample analyses show that radionuclide
concentrations are within applicable DOE guidelines. Based upon the results of the post-
remedial-action data, which are confirmed by the verification assessment data, these
radiological measurements fall below the limits prescribed by DOE guidelines. It is
concluded that the site successfully meets the DOE remedial action objectives.
4-19/iR/h
^——* ^ ^ * d . f. .« •.
n 7777. 77,
YA YA
V9 V8 '/s
Y; V2
4-22MR/h V7 V3
ED 4-18uR/h
4-16^R/h V5 A\
7A V6 4-17/uR/h V6
4-17uR/h V7
V3
i V2 5-19LiR/h V4
5-20^R/h V9 V5
Z
EXPLANATION
fV';Vs-:l Concrete
Assessed
contamination
/^/l Excavated
//l area
Remaining
contamination
ED
RDC
Measurement
Area idnetifier &
Composite sample
__ Identifier of
j B1 | averaged area &
Biased sample
FEET
0 10 20 30 40
0 3 6 9 12
METERS
MS00689
A00200000130/
MEADOWLARK LANE
MONTICELLO, UTAH
Figure 1. Property Map JRS 4/5/94
8
REFERENCES
Abramiuk, LN. et al. 1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction, Colorado,
for the U.S. Department of Energy, Surplus Facilities Management Program,
Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00689-VL, Address: A00200000130/Meadowlark Lane,
Monticello, Utah 84535, Geotech, Grand Junction, Colorado, December 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1993. Environmental Technology Section Procedures Manual. ORNL
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
DOE ID NO.: MS-00690-VL
Property Address: Parcel No. A00200000150, Meadowlark Lane
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
RUST Geotech Inc. of Energy (DOE)
YES NO NOT TAKEN YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
Ra-226 is ^ 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2.
In-situ [ ] Lab [X]
Interior gamma is < 20 //R/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21.
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Environmental Restoration
Program (Rev. 03/02/87). .
[X]* [ ] [ ]
[X] [ ] [ ]
[ ] [ ] [X]
(Vacant Lot)
[ ] [X] [ ]
W [ ] U
i/\ [ 1 [ ]
[ ] [ 1
I ] I ] [X] [ ] [ ] l>4
(Vacant Lot)
[ ] [X] [ ]
[ 1 [ 1 [X] I ] [ ]
COMMENTS: *The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
llllllllll
SFCERTI FED
lllllllll
SFMS-09030
DOE ID NO.: MS-00690-VL
RUST GEOTECH INC. RECOMMENDATION
Based on the RUST Geotech Inc. evaluation, I recommend this property for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
[X] Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental
standards were applied per 40 CFR 192.21.
Program Manager
RUST Geotech Inc.
Date
DOE EVALUATION
Date
Certification Official
Department of Energy
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00690-VL
ADDRESS: PARCEL NO. A00200000150
MEADOWLARK LANE
MONTICELLO, UTAH 84535
DECEMBER 1993
Prepared for
Environmental Restoration Program
Department of Energy
RUST Geotech Inc. has been granted authorization to conduct remedial action under
the Environmental Restoration Program. Remedial action was done in accordance
with the U.S. Environmental Protection Agency "Standards for Cleanup of Land and
Buildings Contaminated with Residual Radioactive Materials from Inactive Uranium
Processing Sites," 40 CFR 192.12, 192.20-23.
by
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
DOE ID NO.: MS-00690-VL
1.0 SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Environmental Restoration Program with the primary objective of
reducing the potential hazard to the public due to long-term exposure to
low-level radioactivity associated with the offsite mill tailings derived from
the former U.S. Atomic Energy Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to provide
additional sources of vanadium needed during World War II. Various
government agencies operated the mill until 1947. The AEC obtained the
mill in 1948 and operated it through 1959 under cost-type contracts to
provide both uranium and vanadium. Mill operations were terminated on
January 1, 1960.
The mill processed approximately one million tons of ore during the AEC
operations. Throughout the operating period, mill tailings from the
Monticello millsite were removed from the site and used for construction-
related activities in the vicinity.
1.2 Criteria for Remedial Action
The Environmental Restoration Program adopted the "Standards for
Remedial Actions at Inactive Uranium Processing Sites" (40 CFR Part 192)
for all cleanup activities under the MVP Project. These standards were
prepared by the U.S. Environmental Protection Agency (EPA) to establish
guidelines for the control of tailings piles and the cleanup of buildings and
open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the EPA
standards. The Remedial Action Contractor was notified of the inclusion
of this property into the Environmental Restoration Program and was
authorized by the DOE to conduct remedial action as required to bring the
property into conformance with the EPA standards.
1
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
DOE ID NO.: MS-00690-VL
MS-00690-VL
Lot 15, Meadowlark Acres Subdivision, City
of Monticello, County of San Juan, State of
Utah
Parcel No. A00200000150
Meadowlark Lane
Monticello, Utah 84535

Vacant Lot (VL)
Not applicable; inclusion requested by the
Remedial Action Contractor
December 31, 1991
RUST Geotech Inc.
July 27, 1992
Crowley Construction
East Route
Monticello, Utah
May 25, 1993
July 19, 1993
Interior: 0 cubic yards
Exterior: 91 cubic yards
329 square meters (m2)
December 1993
2
DOE ID NO.: MS-00690-VL
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual radioactive
material (Appendix Figure 2.1). Once excavation was complete, the
affected area was resurveyed for possible remaining residual radioactive
material and, upon attaining satisfactory results, was backfilled with
uncontaminated material. The property was restored to a physical
condition comparable to that which existed prior to remedial action
activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified contamination, 6 inches deep,
within the property. The remedial action process included the removal of
approximately 91 cubic yards of residual radioactive material, 8 inches
deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
3.0 VERIFICATION SUMMARY
DOE ID NO.: MS-00690-VL
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by RUST Geotech Inc. during
May 1991, as described in the final REA dated July 1992.
Appendix Figure 2.1 shows the extent of assessed contamination
and identifies the area recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to backfilling.
Following the gamma scan, soil samples representative of the
6-inch-thick soil layer at the bottom of the excavation were
collected. These samples were blended to form composite
samples representing the verification areas (Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 13 microroentgens per hour (//R/h)
to 20 //R/h (Appendix Figure 2.1). The results of analyses for
radium-226 in four composite soil samples ranged from
1.6 picocuries per gram (pCi/g) to 1.9 pCi/g (Appendix Table 3.1).
4
DOE ID NO.: MS-00690-VL
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by the EPA standards (40 CFR 192.12, 192.20-23),
as indicated in the Certification Data Summary below.
Therefore, the property located at Parcel No. A00200000150,
Meadowlark Lane, in Monticello, Utah, is recommended for certification
as required by the Environmental Restoration Program guidelines, and
the appropriate records should be documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Standards
Shall not exceed 20 //R/h
above background.
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Results
Not applicable:
vacant lot.
Not applicable:
vacant lot.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background* in the
15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below
the surface, averaged
over 100 m2.
< 5 pCi/g above
background.
Soil sample results
ranged from 1.6 pCi/g
1.9 pCi/g.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00690-VL
4.0 APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
MM-KMA: 12-08-93
MS-00690.VL WP51
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00690-VL
Address: Parcel No. A00200000150, Meadowlark Lane, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range (//R/h) Ticket No. Method* (pCi/g)
V-l 13 - 17 NAW 441 OCS 1.6
V-2 14 - 20 NAW 442 OCS 1.7
V-3 13 - 16 NAW 443 OCS 1.6
V-4 13 - 17 NAW 444 OCS 1.9
See Appendix Figure 2.1 for the verification areas.
*OCS = Opposed Crystal System
7
10
30
12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
30
28
26
24
22 -
20
18 -
16
MEADOWLARK LANE
///
r 13-16
V-4
13-17
V-3
13-16
0 13-16
V-2
13-16 iy 14-20
V-1
13-17 •:< 6 > • 8
J L.
©
rv.-.vi
iv.-.vj
12-15
1 2
v-1
16-17
LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN //R/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
28
26
- 24
22
20
RADIOLOGICAL AS-BUILT
18
16
1 4
12
10
Y
cn
o
20 10
RM00690V 12/14/93 TMT/529
J I
SCALE IN FEET
20
J L
40
THIS DRAWING, PREPARED FOR THE ENVIRONMENTAL RESTORATION
PROGRAM, IS FOR THE SOLE USE OF THE U.S. DEPARTMENT OF
ENERGY AND ITS CONTRACTORS. IT IS NOT A LAND SURVEY PLAT,
UTILITY LOCATION PLAT, OR OTHER IMPROVEMENT SURVEY PLAT
AND IS NOT TO BE RELIED UPON FOR THE ESTABLISHMENT OF
FENCE, BUILDING, OR OTHER FUTURE IMPROVEMENT LINES.
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
RESIDENCE-NO. OF OCCUPANTS
NON—RESIDENCE—MAN—HRS./WK.
INSTRUMENT NO.
VERIFICATION
BY CK. A.E. APP. NO. DATE
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE. COLORADO
XA-DATE
AT 73 PARCEL NO. A00200000150
MEADOWLARK LANE
MONTICELLO, UTAH
GEOTECH INC
APPROVAL DOE
OOE io NO. MS-00690-VL
owe.NO. 3-B00690-V1 SHr 1 or 1
14
12
10
10 12 1 4 16 18 20 22 24 26 28 30 32 34 36 38 40
OAK RIDGE NATIONAL LABORATORY
MANAGED BY MARTIN MARIETTA ENERGY SYSTEMS, INC.
GRAND JUNCTION OFFICE
RO. BOX 2567
GRAND JUNCTION. COLORADO 81502
APR 2 8 199+
Donald N. Leske
Project Manager, Monticello Projects
U.S. Department of Energy
P. 0. Box 2567
Grand Junction, 81502
Dear Mr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil and exterior gamma exposure
rate at this property.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Gretcnen A. Pierce
MVP/IVC Project Manager
Environmental Assessment Group
Location Number: MS00690-VL
Location Address: A00200000150/Meadowlark Lane
Monticello. Utah 84535
Property Owner:

Tenant Name: Vacant lot
Attachments
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
AfJ0200000150/MEADOWLARK LANE
MONTICELLO, UTAH (MS00690-VL)
A. R. Jones
April 1994
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from A00200000150/Meadowlark
Lane, Monticello, Utah (MS00690-VL) 5
v
AOOSiO\vlJ3DGMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge T. L. Meyer for analysis of soil samples and M. K. Jensen and E. M. Pilz for
technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1993, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at
A00200000150/Meadowlark Lane, Monticello, Utah. The Environmental
Technology Section (ETS) of Oak Ridge National Laboratory was assigned the
responsibility of verifying the data supporting the adequacy of remedial action and
confirming the site's compliance with DOE guidelines. The ETS found that the
site successfully meets the DOE remedial action objectives. Procedures used by
the ETS are described in the Environmental Technology Section Procedures
Manual (ORNL, 1993).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT A00200000150/MEADOWLARK LANE
MONTICELLO, UTAH (MS00690-VL)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War II. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Environmental
Assessment Group in the Environmental Technology Section of the Health Sciences Research
Division at Oak Ridge National Laboratory under DOE contract DE-AC05-84OR21400 with Martin
Marietta Energy Systems, Inc.
2
During 1993, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a vacant land located at A00200000150/Meadowlark Lane, Monticello,
Utah. The remedial action plan required excavation of all exterior contamination. When
the excavation was completed, the property was resurveyed, including soil sampling, to
ensure the removal of all contamination, backfilled with uncontaminated material, and
restored to a condition comparable to that which existed prior to remedial action
(Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Environmental Technology Section (ETS) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the
A00200000150/Meadowlark Lane site. This report describes the methods and results of
that verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 66 yd3 of mill tailings
6 inches deep. However, during the actual removal process, a total of 91 yd3 of
contaminated earth and uranium mill tailings, 8 inches deep were removed from a 329 m2
area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of gamma scans with a scintillometer, of the
exterior and soil sampling. Samples representative of the bottom 15-cm (6-in.) soil layers
of the 4 excavated areas were collected and blended to form representative composite soil
samples for each verification area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Exterior surface gamma exposure rate measurements taken by Geotech from the
excavated areas prior to backfilling ranged from 13 to 20 /iR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. There were four excavated areas for this
property. Geotech's analysis of these samples showed ^Ra concentrations from 1.6 to 1.9
pCi/g in the composite sample. ORNL ETS obtained a percentage of these soil samples
and performed a confirmatory analysis, which showed ^Ra concentrations from 1.8 to 2.6
pCi/g. These values are below the DOE guideline value of 15 pCi/g for soil layers > 15
cm below the surface (Table 1). Results of Geotech and ORNL soil sample analyses are
given in Table 2.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first IS cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to ^Rn Average annual radon proge- 0.03 WL
progeny ny concentration (including
background)
(DOE 1990)
5
Table 2. Results of ORNL analysis of Geotech soil samples
from A002Q()UU0150/Meadowlark Lane, MonticeDo Utah (MS00690-VL)
^Ra concentration (pCi/g)
ORNL Geotech '
sample sample Depth ORNL Geotech
No." No* (cm)
XI NAW 441 >15 1.8 1.6
X2 NAW 444 >15 2.6 1.9
An X-type sample is a split of the sample taken by the remedial action contractor.
Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
6
REFERENCES
Abramiuk I. N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00690-VL, Address: A00200000150/Meadowlark Lane,
Monticello, Utah 84535, Geotech, Grand Junction, Colorado, December 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1993. Environmental Technology Section Procedures Manual. ORNL
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
DOE ID NO.: MS-00691-VL
Property Address: Parcel No. A00200000160, Meadowlark Lane
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2.
In-situ [ ] Lab [X]
Interior gamma is < 20 //R/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21.
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Environmental Restoration
Program (Rev. 03/02/87).
RUST Geotech Inc.
YES NO NOT TAKEN
[X]* [ ] [ ]
[X] [ ] [ ]
[ ] [ ] [X]
(Vacant Lot)
[ ] [X] [ ]
U.S. Department
of Enerov (DOE)
YES NO NOT TAKEN
l)Q I } [ ]
[ 1 [ 1
[ ] [ ] [X] [ ] [ ] [XI
(Vacant Lot)
[ ] fXl [ 1
[ ] [ ] IX] [ ] [ ] tx]
COMMENTS: *The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
ililllllllll
SFCERTI FED
111
SFMS-09044
IN
7 1
DOE ID NO.: MS-00691-VL
RUST GEOTECH INC. RECOMMENDATION
Based on the RUST Geotech Inc. evaluation, I recommend this property for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
A arry Date Program Manager
RUST Geotech Inc.
DOE EVALUATION
pO Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental
standards were applied per 40 CFR 192.21.
Environmental Restoration Program
Certification Official
Department of Energy
13/L, fiS-
Date7
PROPERTY COMPLETION REPORT
DOE ID NO.: MS-00691-VL
ADDRESS: PARCEL NO. A00200000160
MEADOWLARK LANE
MONTICELLO, UTAH 84535
NOVEMBER 1993
Prepared for
Environmental Restoration Program
Department of Energy
RUST Geotech Inc. has been granted authorization to conduct remedial action under
the Environmental Restoration Program. Remedial action was done in accordance
with the U.S. Environmental Protection Agency "Standards for Cleanup of Land and
Buildings Contaminated with Residual Radioactive Materials from Inactive Uranium
Processing Sites," 40 CFR 192.12, 192.20-23.
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
by
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
i
DOE ID NO.: MS-00691-VL
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Environmental Restoration Program with the primary objective of
reducing the potential hazard to the public due to long-term exposure to
low-level radioactivity associated with the offsite mill tailings derived from
the former U.S. Atomic Energy Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to provide
additional sources of vanadium needed during World War II. Various
government agencies operated the mill until 1947. The AEC obtained the
mill in 1948 and operated it through 1959 under cost-type contracts to
provide both uranium and vanadium. Mill operations were terminated on
January 1, 1960.
The mill processed approximately one million tons of ore during the AEC
operations. Throughout the operating period, mill tailings from the
Monticello millsite were removed from the site and used for construction-
related activities in the vicinity.
1.2 Criteria for Remedial Action
The Environmental Restoration Program adopted the "Standards for
Remedial Actions at Inactive Uranium Processing Sites" (40 CFR Part 192)
for all cleanup activities under the MVP Project. These standards were
prepared by the U.S. Environmental Protection Agency (EPA) to establish
guidelines for the control of tailings piles and the cleanup of buildings and
open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the EPA
standards. The Remedial Action Contractor was notified of the inclusion
of this property into the Environmental Restoration Program and was
authorized by the DOE to conduct remedial action as required to bring the
property into conformance with the EPA standards.
1
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
DOE ID NO.: MS-00691-VL
MS-00691-VL
Lot 16, Meadowlark Acres Subdivision, City
of Monticello, County of San Juan, State of
Utah
Parcel No. A00200000160
Meadowlark Lane
Monticello, Utah 84535

Vacant Lot (VL)
Not applicable; inclusion requested by the
Remedial Action Contractor
December 9, 1991
RUST Geotech Inc.
November 21, 1992
Crowley Construction, Inc.
East Route
Monticello, Utah
May 18, 1993
July 19, 1993
Interior: 0 cubic yards
Exterior: 131 cubic yards
659 square meters (ma)
November 1993
2
DOE ID NO.: MS-00691-VL
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual radioactive
material (Appendix Figure 2.1). Once excavation was complete, the
affected area was resurveyed for possible remaining residual radioactive
material and, upon attaining satisfactory results, was backfilled with
uncontaminated material. The property was restored to a physical
condition comparable to that which existed prior to remedial action
activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified contamination, 6 inches deep,
within the property. The remedial action process included the removal of
approximately 131 cubic yards of residual radioactive material, 6 inches
deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00691-VL
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by RUST Geotech Inc. during
June 1991, as described in the final REA dated November 1992.
Appendix Figure 2.1 shows the extent of assessed contamination
and identifies the area recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to backfilling.
Following the gamma scan, soil samples representative of the
6-inch-thick soil layer at the bottom of the excavation were
collected. These samples were blended to form composite
samples representing the verification areas (Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 13 microroentgens per hour (//R/h)
to 24 //R/h (Appendix Figure 2.1). The results of analyses for
radium-226 in eight composite soil samples ranged from
1.5 picocuries per gram (pCi/g) to 4.7 pCi/g (Appendix Table 3.1).
4
DOE ID NO.: MS-00691-VL
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by the EPA standards (40 CFR 192.12, 192.20-23),
as indicated in the Certification Data Summary below.
Therefore, the property located at Parcel No. A00200000160,
Meadowlark Lane, in Monticello, Utah, is recommended for certification
as required by the Environmental Restoration Program guidelines, and
the appropriate records should be documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Standards
Shall not exceed 20 //R/h
above background.
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Results
Not applicable:
vacant lot.
Not applicable:
vacant lot.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background* in the
15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below
the surface, averaged
over 100 m2.
< 5 pCi/g above
background.
Soil sample results
ranged from 1.5 pCi/g to
4.7 pCi/g.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00691-VL
4.0 APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
MM-MRW: 11-01-93
MS-00691.VL WP51
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00691-VL
Address: Parcel No. A00200000160, Meadowlark Lane, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range (/;R/h) Ticket No. Method* (pCi/g)
V-l 15 - 24 NAZ 288 OCS 3.5
V-2 14 - 20 NAZ 289 OCS 2.6
V-3 14 - 19 NAZ 290 OCS 2.2
V-4 13 - 18 NAZ 291 OCS 1.9
V-5 14-17 NCC 080 OCS 1.5
V-6 14 - 17 NCC 081 OCS 1.8
V-7 13 - 17 NCC 082 OCS 4.7
V-8 13 - 17 NCC 083 OCS 2.2
See Appendix Figure 2.1 for the verification areas.
•OCS = Opposed Crystal System
7
10
30
12 1 4 16 18 20 22 24 26 28 30 32 34 36 38 40
30
28
26
24
22
20 -
18
1 6
1 4
1 2
UJ z <
_i
cr
<
o
Q <
Y NORTH
MEADOWLARK LANE
///
13-16
24
©
3-16
20
© V-7
/ ^ 13-17
/© V-5
4-7
0 V-4
13-18
© :© V-8
13-17 V-6
4-17
13-16
^20LCL
SCALE IN FEET
20 40
THIS DRAWING, PREPARED FOR THE ENVIRONMENTAL RESTORATION
PROGRAM. IS FOR THE SOLE USE OF THE U.S. DEPARTMENT OF
ENERGY AND ITS CONTRACTORS. IT IS NOT A LAND SURVEY PLAT,
UTILITY LOCATION PLAT, OR OTHER IMPROVEMENT SURVEY PLAT
AND IS NOT TO BE RELIED UPON FOR THE ESTABLISHMENT OF
FENCE, BUILDING, OR OTHER FUTURE IMPROVEMENT LINES.
RM00691V 11/16/93 KWP/831
—— X
®
®
r~ ~i
L__J
12-15
1 2
V-1
16-17
LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN /xR/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
28
26
- 24
- 22
- 20
- 18
RADIOLOGICAL AS-BUILT
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
- 16
10
RESIDENCE-NO. Of OCCUPANTS
NON—RESIDENCE—HAN—HRS./WK.
INSTRUMENT NO.
SURVEY DATE
VERIFICATION
Br CK. A.E. APP. NO. DATE CK. A.E. APP.
14
tt
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE, COLORADO
KM
PARCEL NO. A00200000160
MEADOWLARK LANE
MONTICELLO, UTAH
12
GEOTECH INC
DATE I APPROVAL DOE
DOE io NO. MS-00691-VL
QWO.NO. 3 — B00691 —V1 SHT 1nr 1
10
1 n 1 9 1 A 1 fi 1 R 9D 99 94 9fi 9R "SO -*i9 ^4 4D
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS. INC.
GRANO JUNCTION OFFICE
P. 0. BOX 2567
GRAND JUNCTION. COLORADO 81502
FEB 2 S1994
Donald N. Leske
Project Manager, Monticello Projects
U.S. Department of Energy
P. 0. Box 2567
Grand Junction, 81502
Dear Mr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Gretchen A. Pierce
MVP/IVC Project Manager
Environmental Assessment Group
Location Number: MS00691
Location Address: AOO200OOO160/ Meadowlark Lane
Monticello. Utah 84535
Property Owner:

Tenant Name: Vacant
Attachments
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
A00200000160/ MEADOWLARK LANE
MONTICELLO, UTAH (MS00691)
A R. Jones
February 1994
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from A00200000160/ Meadowlark
Lane, Monticello, Utah (MS00691) 5
v
ACXNOWI£LXJMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge M. K. Jensen for analysis of soil samples and J. R. Sauvage and T. L. Holmes
for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1993, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at
A00200000160/ Meadowlark Lane, Monticello, Utah. The Environmental
Technology Section (ETS) of Oak Ridge National Laboratory was assigned the
responsibility of verifying the data supporting the adequacy of remedial action and
confirming the site's compliance with DOE guidelines. The ETS found that the
site successfully meets the DOE remedial action objectives. Procedures used by
the ETS are described in the Environmental Technology Section Procedures
Manual (ORNL, 1993).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT A00200000160/ MEADOWLARK LANE
MONTICELLO, UTAH (MS00691)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War IL Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
""The verification of remedial action was performed by members of the Environmental
Assessment Group in the Environmental Technology Section of the Health Sciences Research
Division at Oak Ridge National Laboratory under DOE contract DE-AC05-84OR21400 with Martin
Marietta Energy Systems, Inc.
2
During 1993, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a vacant lot located at A00200000160/ Meadowlark Lane, Monticello, Utah.
The remedial action plan required excavation of all exterior contamination. When the
excavation was completed, the property was resurveyed, including soil sampling, to ensure
the removal of all contamination, backfilled with uncontaminated material, and restored to
a condition comparable to that which existed prior to remedial action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Environmental Technology Section (ETS) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the A00200000160/
Meadowlark Lane site. This report describes the methods and results of that verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 112 yd3 of mill
tailings 6 inches deep. However, during the actual removal process, a total of 131 yd3 of
contaminated earth and uranium mill tailings, 6 inches deep were removed from a 659 m2
area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of a surface gamma scan with a scintillometer of
the exterior and soil sampling. Samples representative of the bottom 15-cm (6-in.) soil
layers of 8 excavated areas were collected and blended to form representative composite
soil samples for each verification area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Exterior surface gamma exposure rate measurements taken by Geotech from the
excavated areas prior to backfilling ranged from 13 to 24 /iR/h.
Sofl Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. There were 8 excavated areas for this
property. Geotech's analysis of these samples showed ^Ra concentrations from 1.5 to 4.7
pCi/g in the composite sample. ORNL ETS obtained a percentage of these soil samples
and performed a confirmatory analysis, which showed ^Ra concentrations from 3.6 to 5.6
pCi/g. These values are below the DOE guideline value of 15 pCi/g for soil layers >15
cm below the surface (Table 1). Results of Geotech and ORNL soil sample analyses are
given in Table 2.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Exposure to 222Rn
progeny
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
Average annual radon proge-
ny concentration (including
background)
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
0.03 WL
(DOE 1990)
J I
5
Table 2. Results of ORNL analysis of Geotech soil samples
from A00200000160/ Meadowlark Lane, Monticello Utah (MS00691)
226Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No* (cm)
XI NAZ 288 >15 3.6 3.5
X7 NCC 082 >15 5.6 4.7
° An X-type sample is a split of the sample taken by the remedial action contractor.
b Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
6
REFERENCES
Abramiuk I. N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00691, Address: A00200000160I Meadowlark Lane,
Monticello, Utah 84535, Geotech, Grand Junction, Colorado, November 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1993. Environmental Technology Section Procedures Manual. ORNL
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
DOE ID NO.: MS-00692-VL
Property Address: Parcel No. A00200000180, Meadowlark Lane
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
Ra-226 is =s 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2.
In-situ [ ] Lab [X]
Interior gamma is :£ 20 //R/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21.
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Environmental Restoration
Program (Rev. 03/02/87).
RUST Geotech Inc.
YES NO NOT TAKEN
[X]* [ ] [ ]
[X] [ ] [ ]
[ 1 [ 1 [X]
(Vacant Lot)
[ ] [X] [ ]
U.S. Department
of Energy (DOE)
YES NO NOT TAKEN
[Xl [ 1 [ ]
lX] t 1 I 1
[ ] [ 1
[ ] [ ] [X] [ ] [ ] [XJ
(Vacant Lot)
[ 1 M [ ]
[ 1 [ 1 [X] [ ] [ ] [>J
COMMENTS: *The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
iiiiiiiiinii
SFCERTI FED SFMS-89044
DOE ID NO.: MS-00692-VL
RUST GEOTECH INC. RECOMMENDATION
Based on the RUST Geotech Inc. evaluation, I recommend this property for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
farry A. Pe/fy Date
Program Manager
RUST Geotech Inc.
DOE EVALUATION
[)(] Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental
standards were applied per 40 CFR 192.21.
Environmental Restoratio'
Certification Official
Department of Energy
Program Date
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00692-VL
ADDRESS: PARCEL NO. A00200000180
MEADOWLARK LANE
MONTICELLO, UTAH 84535
NOVEMBER 1993
Prepared for
Environmental Restoration Program
Department of Energy
RUST Geotech Inc. has been granted authorization to conduct remedial action under
the Environmental Restoration Program. Remedial action was done in accordance
with the U.S. Environmental Protection Agency "Standards for Cleanup of Land and
Buildings Contaminated with Residual Radioactive Materials from Inactive Uranium
Processing Sites," 40 CFR 192.12, 192.20-23.
by
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
DOE ID NO.: MS-00692-VL
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Environmental Restoration Program with the primary objective of
reducing the potential hazard to the public due to long-term exposure to
low-level radioactivity associated with the offsite mill tailings derived from
the former U.S. Atomic Energy Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to provide
additional sources of vanadium needed during World War II. Various
government agencies operated the mill until 1947. The AEC obtained the
mill in 1948 and operated it through 1959 under cost-type contracts to
provide both uranium and vanadium. Mill operations were terminated on
January 1, 1960.
The mill processed approximately one million tons of ore during the AEC
operations. Throughout the operating period, mill tailings from the
Monticello millsite were removed from the site and used for construction-
related activities in the vicinity.
1.2 Criteria for Remedial Action
The Environmental Restoration Program adopted the "Standards for
Remedial Actions at Inactive Uranium Processing Sites" (40 CFR Part 192)
for all cleanup activities under the MVP Project. These standards were
prepared by the U.S. Environmental Protection Agency (EPA) to establish
guidelines for the control of tailings piles and the cleanup of buildings and
open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the EPA
standards. The Remedial Action Contractor was notified of the inclusion
of this property into the Environmental Restoration Program and was
authorized by the DOE to conduct remedial action as required to bring the
property into conformance with the EPA standards.
1
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
DOE ID NO.: MS-00692-VL
MS-00692-VL
Lot 18, Meadowlark Acres Subdivision, City
of Monticello, County of San Juan, State of
Utah
Parcel No. A00200000180
Meadowlark Lane
Monticello, Utah 84535

Vacant Lot (VL)
Not applicable; inclusion requested by
the Remedial Action Contractor
December 9, 1991
RUST Geotech Inc.
November 21, 1992
Crowley Construction, Inc.
East Route
Monticello, Utah
May 18, 1993
July 19, 1993
Interior: 0 cubic yards
Exterior: 17 cubic yards
86 square meters (m2)
November 1993
2
DOE ID NO.: MS-00692-VL
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual radioactive
material (Appendix Figure 2.1). Once excavation was complete, the
affected area was resurveyed for possible remaining residual radioactive
material and, upon attaining satisfactory results, was backfilled with
uncontaminated material. The property was restored to a physical
condition comparable to that which existed prior to remedial action
activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified contamination, 6 inches deep,
within the property. The remedial action process included the removal of
approximately 17 cubic yards of residual radioactive material,
6 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00692-VL
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by RUST Geotech Inc. during
June 1991, as described in the final REA dated November 1992.
Appendix Figure 2.1 shows the extent of assessed contamination
and identifies the area recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to backfilling.
Following the gamma scan, soil samples representative of the
6-inch-thick soil layer at the bottom of the excavation were
collected. These samples were blended to form a composite
sample representing the verification area (Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 12 microroentgens per hour (j/R/h)
to 17 //R/h (Appendix Figure 2.1). The result of analysis for
radium-226 in one composite soil sample was 2.0 picocuries per
gram (pCi/g), as indicated in Appendix Table 3.1.
4
DOE ID NO.: MS-00692-VL
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by the EPA standards (40 CFR 192.12, 192.20-23),
as indicated in the Certification Data Summary below.
Therefore, the property located at Parcel No. A00200000180,
Meadowlark Lane, in Monticello, Utah, is recommended for certification
as required by the Environmental Restoration Program guidelines, and
the appropriate records should be documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Standards
Shall not exceed 20 //R/h
above background.
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Results
Not applicable:
vacant lot.
Not applicable:
vacant lot.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background* in the
15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below
the surface, averaged
over 100 m2.
< 5 pCi/g above
background.
Soil sample result was
2.0 pCi/g.
•The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00692-VL
4.0 APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
MM-MRW:11-02-93
MS-00692.VL WP51
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00692-VL
Address: Parcel No. A00200000180, Meadowlark Lane, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range fo/R/h) Ticket No. Method* (pCi/g)
V-l 13 - 17 NCB 809 OCS 2.0
See Appendix Figure 2.1 for the verification area.
*OCS = Opposed Crystal System
7
10
30
12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
30
28
26
24
22 —
20 -
18
16 -
1 4
12
Y
MEADOWLARK LANE
/// ///
r i
12-16
12-16
12-16
L
®
NORTH
SCALE IN FEET
20 10 0 20 40
THIS DRAWING, PREPARED FOR THE ENVIRONMENTAL RESTORATION
PROGRAM, IS FOR THE SOLE USE OF THE U.S. DEPARTMENT OF
ENERGY AND ITS CONTRACTORS. IT IS NOT A LAND SURVEY PLAT,
UTILITY LOCATION PLAT, OR OTHER IMPROVEMENT SURVEY PLAT
AND IS NOT TO BE RELIED UPON FOR THE ESTABLISHMENT OF
FENCE, BUILDING, OR OTHER FUTURE IMPROVEMENT LINES.
RM00692V 11/15/93 KDF/B33
—— X
10 J L
0
I I
12-15
12
v-1
16-17
LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN /xR/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
28
26
24
22
20
18
RADIOLOGICAL AS-BUILT
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
16
RESIDENCE-NO. OF OCCUPANTS
NON—RESIDENCE—MAN—HRS./WK.
INSTRUMENT NO.
1 4
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE, COLORADO
E?t= II, PARCEL NO. A00200000180
MEADOWLARK LANE
MONTICELLO, UTAH
12
APPROVAL
GEOTECH INC.
APPROVAL DOE OATE
DOE ID NO. MS-00692-VL
DWG.N0. 3-BQQ692-V1 «MT 1 nr 1 10
10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS, INC.
GRAND JUNCTION OFFICE
P. 0. BOX 2567
GRANO JUNCTION. COLORADO 81502
FEB £ 31994
Donald N. Leske
Project Manager, Monticello Projects
U.S. Department of Energy
P. 0. Box 2567
Grand Junction, 81502
Dear Mr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the ^Ra concentration in the soil.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Gretchen A. Pierce
MVP/IVC Project Manager
Environmental Assessment Group
Location Number: MS00692
Location Address: A00200000180/ Meadowlark Lane
Monticello. Utah 84535
Property Owner:

Tenant Name: Vacant
Attachments
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
AOQ2000001807 MEADOWLARK LANE
MONTICELLO, UTAH (MS00692)
A R. Jones
February 1994
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from A00200000180/ Meadowlark
Lane, Monticello, Utah (MS00692) 5
v
ACKNOWLFJXJMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge M. K. Jensen for analysis of soil samples and J. R. Sauvage and T. L. Holmes
for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1993, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at
A00200000180/ Meadowlark Lane, Monticello, Utah. The Environmental
Technology Section (ETS) of Oak Ridge National Laboratory was assigned the
responsibility of verifying the data supporting the adequacy of remedial action and
confirming the site's compliance with DOE guidelines. The ETS found that the
site successfully meets the DOE remedial action objectives. Procedures used by
the ETS are described in the Environmental Technology Section Procedures
Manual (ORNL, 1993).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT A0020000018Q/ MEADOWLARK LANE
MONTICELLO, UTAH (MS00692)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War TJ. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
'"The verification of remedial action was performed by members of the Environmental
Assessment Group in the Environmental Technology Section of the Health Sciences Research
Division at Oak Ridge National Laboratory under DOE contract DE-AC05-84OR21400 with Martin
Marietta Energy Systems, Inc.
2
During 1993, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a vacant lot located at A00200000180/ Meadowlark Lane, Monticello, Utah.
The remedial action plan required excavation of all exterior contamination. When the
excavation was completed, the property was resurveyed, including soil sampling, to ensure
the removal of all contamination, backfilled with uncontaminated material, and restored to
a condition comparable to that which existed prior to remedial action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verily the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Environmental Technology Section (ETS) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the A002000001807
Meadowlark Lane site. This report describes the methods and results of that verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 17 yd3 of mill tailings
6 inches deep. During the actual removal process, a total of 17 yd3 of contaminated earth
and uranium mill tailings, 6 inches deep were removed from a 86 m2 area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of a surface gamma scan with a scintillometer, of
the exterior and soil sampling. Samples representative of the bottom 15-cm (6-in.) soil
layers of the excavated area were collected and blended to form a representative
composite soil samples for each verification area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Exterior surface gamma exposure rate measurements taken by Geotech from the
excavated areas prior to backfilling ranged from 13 to 17 /iR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected a soil sample representative of the excavated
area from the bottom 15-cm (6-in.) soil layer. Geotech's analysis of this sample showed a
^Ra concentration of 2.0 pCi/g in the composite sample. ORNL ETS obtained a
percentage of this soil sample and performed a confirmatory analysis, which showed a
^Ra concentration of 3.1 pCi/g. These values are below the DOE guideline value of 15
pCi/g for soil layers >15 cm below the surface (Table 1). Results of Geotech and ORNL
soil sample analyses are given in Table 2.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to 222Rn
progeny
Average annual radon proge-
ny concentration (including
background)
0.03 WL
(DOE 1990)
5
Table 2. Results of ORNL analysis of Geotech sofl samples
from A00200000180/ Meadowlark Lane, Monticello Utah (MS00692)
22*Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No* (cm)
XI NCB809 >15 3.1 ZO
" An X-type sample is a split of the sample taken by the remedial action contractor.
6 Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
6
REFERENCES
Abramiuk I. N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00692, Address: A00200000180I Meadowlark Lane,
Monticello, Utah 84535, Geotech, Grand Junction, Colorado, November 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1993. Environmental Technology Section Procedures Manual. ORNL
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
DOE ID NO.: MS-00693-VL
Property Address: Parcel No. A00200000190, Meadowlark Lane
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
RUST Geotech Inc. of Energy (DOE)
YES NO NOT TAKEN YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2. [X]* [ ] [ ] [>] [ 1 [ 1
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2. [X] [ ] [ ] [)d I ] [ ]
In-situ [ ] Lab [X]
Interior gamma is <, 20 /yR/h
above background in any
occupied or habitable
structure. [ ]
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level. [ ]
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21. [ ]
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Environmental Restoration
Program (Rev. 03/02/87). [ ]
[ ] [X] [ ] [ ] UO
(Vacant Lot)
[ ] [X] [ ] [ ] [VJ
(Vacant Lot)
[X] [ ] [ ] [%] [ )
[ ] [X] [ ] [ ] DO
COMMENTS: *The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
Illllllillll lIHllilil
SFCERTI FED SFMS-09044
< f
DOE ID NO.: MS-00693-VL
RUST GEOTECH INC. RECOMMENDATION
Based on the RUST Geotech Inc. evaluation, I recommend this property for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
7 larry A. Perry
Program Manager
RUST Geotech Inc
Date
DOE EVALUATION
DO Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental
standards were applied per 40 CFR 192.21.
storation F Environmental Restoration
Certification Official
Department of Energy
1S~
Program Date
PROPERTY COMPLETION REPORT
DOE ID NO.: MS-00693-VL
ADDRESS: PARCEL NO. A00200000190
MEADOWLARK LANE
MONTICELLO, UTAH 84535
NOVEMBER 1993
Prepared for
Environmental Restoration Program
Department of Energy
RUST Geotech Inc. has been granted authorization to conduct remedial action under
the Environmental Restoration Program. Remedial action was done in accordance
with the U.S. Environmental Protection Agency "Standards for Cleanup of Land and
Buildings Contaminated with Residual Radioactive Materials from Inactive Uranium
Processing Sites," 40 CFR 192.12, 192.20-23.
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
by
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
t V
TABLE OF CONTENTS
Section page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
i
DOE ID NO.: MS-00693-VL
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Environmental Restoration Program with the primary objective of
reducing the potential hazard to the public due to long-term exposure to
low-level radioactivity associated with the offsite mill tailings derived from
the former U.S. Atomic Energy Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to provide
additional sources of vanadium needed during World War II. Various
government agencies operated the mill until 1947. The AEC obtained the
mill in 1948 and operated it through 1959 under cost-type contracts to
provide both uranium and vanadium. Mill operations were terminated on
January 1, 1960.
The mill processed approximately one million tons of ore during the AEC
operations. Throughout the operating period, mill tailings from the
Monticello millsite were removed from the site and used for construction-
related activities in the vicinity.
1.2 Criteria for Remedial Action
The Environmental Restoration Program adopted the "Standards for
Remedial Actions at Inactive Uranium Processing Sites" (40 CFR Part 192)
for all cleanup activities under the MVP Project. These standards were
prepared by the U.S. Environmental Protection Agency (EPA) to establish
guidelines for the control of tailings piles and the cleanup of buildings and
open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the EPA
standards. The Remedial Action Contractor was notified of the inclusion
of this property into the Environmental Restoration Program and was
authorized by the DOE to conduct remedial action as required to bring the
property into conformance with the EPA standards.
1
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
DOE ID NO.: MS-00693-VL
MS-000693-VL
Lot 19, Meadowlark Acres Subdivision, City
of Monticello, County of San Juan, State of
Utah
Parcel No. A00200000190
Meadowlark Lane
Monticello, Utah 84535

Vacant Lot (VL)
Not applicable; inclusion requested by
the Remedial Action Contractor
December 9, 1991
RUST Geotech Inc.
November 21, 1992
Crowley Construction, Inc.
East Route
Monticello, Utah
May 18, 1993
July 19, 1993
Interior: 0 cubic yards
Exterior: 20 cubic yards
101 square meters (ma)
November 1993
2
DOE ID NO.: MS-00693-VL
OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual radioactive
material (Appendix Figure 2.1). Once excavation was complete, the
affected areas were resurveyed for possible remaining residual radioactive
material and, upon attaining satisfactory results, were backfilled with
uncontaminated material. The property was restored to a physical
condition comparable to that which existed prior to remedial action
activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified contamination, 6 inches deep,
within the property. The remedial action process included the removal of
approximately 20 cubic yards of residual radioactive material,
6 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
DOE ID NO.: MS-00693-VL
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by RUST Geotech Inc. during
June 1991, as described in the final REA dated November 1992.
Appendix Figure 2.1 shows the extent of assessed contamination
and identifies the areas recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to backfilling.
Following the gamma scan, soil samples representative of the
6-inch-thick soil layer at the bottom of the excavation were
collected. These samples were blended to form composite
samples representing the verification areas (Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 12 microroentgens per hour (//R/h)
to 17 //R/h (Appendix Figure 2.1). The results of analyses for
radium-226 in two composite soil samples were 1.5 picocuries per
gram (pCi/g) and 2.4 pCi/g (Appendix Table 3.1).
4
DOE ID NO.: MS-00693-VL
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by the EPA standards (40 CFR 192.12, 192.20-23),
as indicated in the Certification Data Summary below.
Therefore, the property located at Parcel No. A00200000190,
Meadowlark Lane, in Monticello, Utah, is recommended for certification
as required by the Environmental Restoration Program guidelines, and
the appropriate records should be documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Standards
Shall not exceed 20 /yR/h
above background.
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Resglt?
Not applicable:
vacant lot.
Not applicable:
vacant lot.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background* in the
15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below
the surface, averaged
over 100 m2.
< 5 pCi/g above
background.
Soil sample results were
1.5 pCi/g and 2.4 pCi/g.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00693-VL
4.0 APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
MM-MRW: 11-02-93
MS-00693.VL WP51
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00693-VL
Address: Parcel No. A00200000190, Meadowlark Lane, Monticello, Utah Exposure-Rate Soil Sample Meas. Radium-226
Area Range (//R/h) Ticket No. Method* (pCi/g)
V-l 13 - 16 NCB 807 OCS 1.5
V-2 13 - 17 NCB 808 OCS 2.4
See Appendix Figure 2.1 for the verification areas.
*OCS = Opposed Crystal System
7
10 12 14 16 18 20 22 24 26 28
30•—i—i—i—i—i—i—i—i—i—i—i—i—i—i—i—i—i—r
30 32 34 36 38 40
30
28
26
24
22 -
20
18
16 -
14
12
10
MEADOWLARK LANE
X5
r 12-16
V-2
13-17
©
L
12-16
NORTH
SCALE IN FEET
1
12-16
©
V-1
13-16
0
J
20 10 0 20 40
Y
THIS DRAWING, PREPARED FOR THE ENVIRONMENTAL RESTORATION
PROGRAM, IS FOR THE SOLE USE OF THE U.S. DEPARTMENT OF
ENERGY AND ITS CONTRACTORS. IT IS NOT A LAND SURVEY PLAT,
UTILITY LOCATION PLAT. OR OTHER IMPROVEMENT SURVEY PLAT
AND IS NOT TO BE RELIED UPON FOR THE ESTABLISHMENT OF
FENCE, BUILDING, OR OTHER FUTURE IMPROVEMENT LINES.
RM00693V 11/12/93 KWP/831
—— X
©
<D
r —i
i I
12-15
12
v-1
16-17
LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN /xR/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
28
26
24
22
20
18
RADIOLOGICAL AS-BUILT
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
16
RESIDENCE-NO. OF OCCUPANTS
NON-RESIDENCE-MAN-HRS./WK.
INSTRUMENT NO.
VERIFICATION
BY CK. A.E. APP. NO. BY CK. A.E. APP.
14
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE, COLORADO
$1 PARCEL NO. A00200000190
MEADOWLARK LANE
MONTICELLO, UTAH
1 2
APPROVAL
GEOTECH INC
APPROVAL DOE
OOEIDNO. MS-00693-VL
owe.NO. 3-B00693-V1 SHT 1 „ 1
10
10 12 1 4 16 18 20 22 24 26 28 30 32 34 36 38 40
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS, INC.
GRAND JUNCTION OFFICE
P. 0. BOX 2567
GRAND JUNCTION. COLORADO 81502
FEB Z11934
Donald N. Leske
Project Manager, Monticello Projects
U.S. Department of Energy
P. 0. Box 2567
Grand Junction, 81502
Dear Mr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Gretchen A. Pierce
MVP/IVC Project Manager
Environmental Assessment Group
Location Number: MS00693
Location Address: A00200000190/ Meadowlark Lane
Monticello. Utah 84535
Property Owner:

Tenant Name: Vacant
Attachments
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
A0020norj0190/ MEADOWLARK LANE
MONTICELLO, UTAH (MS00693)
A R. Jones
February 1994
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIHCATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from A00200000190/ Meadowlark
Lane, Monticello, Utah (MS00693) 5
v
AOCNOWLFJXJMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge M. K. Jensen for analysis of soil samples and J. R. Sauvage and T. L. Holmes
for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive matenal resulting from mill
operations. During 1993, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at
A00200000190/ Meadowlark Lane, Monticello, Utah. The Environmental
Technology Section (ETS) of Oak Ridge National Laboratory was assigned the
responsibility of verifying the data supporting the adequacy of remedial action and
confirming the site's compliance with DOE guidelines. The ETS found that the
site successfully meets the DOE remedial action objectives. Procedures used by
the ETS are described in the Environmental Technology Section Procedures
Manual (ORNL, 1993).
ix
RESULTS OF THE INDOTENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT A00200000190/ MEADOWLARK LANE
MONTICELLO, UTAH (MS00693)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War U. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
""The verification of remedial action was performed by members of the Environmental
Assessment Group in the Environmental Technology Section of the Health Sciences Research
Division at Oak Ridge National Laboratory under DOE contract DE-AC05-84OR21400 with Martin
Marietta Energy Systems, Inc.
2
During 1993, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a vacant lot located at A00200000190/ Meadowlark Lane, Monticello, Utah.
The remedial action plan required excavation of all exterior contamination. When the
excavation was completed, the property was resurveyed, including soil sampling, to ensure
the removal of all contamination, backfilled with uncontaminated material, and restored to
a condition comparable to that which existed prior to remedial action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Environmental Technology Section (ETS) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the A00200000190/
Meadowlark Lane site. This report describes the methods and results of that verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 21 yd3 of mill tailings
6 inches deep. During the actual removal process, a total of 20 yd3 of contaminated earth
and uranium mill tailings, 6 inches deep were removed from a 101 m2 area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of a surface gamma scan with a scintillometer of
the exterior and soil sampling. Samples representative of the bottom 15-cm (6-in.) soil
layers of two excavated areas were collected and blended to form representative composite
soil samples for each verification area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Exterior surface gamma exposure rate measurements taken by Geotech from the
excavated areas prior to backfilling ranged from 13 to 17 /iR/h.
Sofl Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. These samples were blended to form a
composite soil sample representative of an average over the two exterior verification areas.
Geotech's analysis of these samples showed ^Ra concentrations of 1.5 to 2.4 pCi/g in the
composite samples. ORNL ETS obtained a percentage of this sample and performed a
confirmatory analysis, which showed a ^Ra concentration of 1.2 to 1.5 pCi/g. These
values are below the DOE guideline value of 15 pCi/g for soil layers >15 cm below the
surface (Table 1). Results of Geotech and ORNL soil sample analyses are given in
Table 2.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Exposure to 222Rn
progeny
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
Average annual radon proge-
ny concentration (including
background)
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
0.03 WL
(DOE 1990)
5
Table 2. Results of ORNL analysis of Geotech soil samples
from A00200000190/ Meadowlark Lane, Monticello Utah (MS00693)
226Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No.* (cm)
XI NCB 807 >15 1.2 1.5
X2 NCB 808 >15 1.5 2.4
" An X-type sample is a split of the sample taken by the remedial action contractor.
* Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
6
REFERENCES
Abramiuk I. N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00693, Address: A00200000190I Meadowlark Lane,
Monticello, Utah 84535, Geotech, Grand Junction, Colorado, November 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1993. Environmental Technology Section Procedures Manual. ORNL
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
f 4
DOE ID NO.: MS-00694-VL
Property Address: Parcel No. A00200000200, Meadowlark Lane
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
RUST Geotech Inc. of Energy (DOE)
YES NO NOT TAKEN YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
[X]* [ ] [ 1 [XI [ 1 [ I
Ra-226 is ^ 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2. [X] [ ] [ ] [*] [ ] [ ]
In-situ [ ] Lab [X]
Interior gamma is :S 20 //R/h
above background in any
occupied or habitable
structure. [ ]
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level. [ ]
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21. [ ]
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Environmental Restoration
Program (Rev. 03/02/87). [ ]
[ ] [X] [ ] [ ] [Vi
(Vacant Lot)
[ ] [X] [ ] [ ] M
(Vacant Lot)
[X] [ ] [ ] [XI [ 1
[ ] [X] [ ] [ 1 [XI
COMMENTS: *The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
•iiiiiiiii miiiiiiiiii
SFCERTI FED SFMS-09944
DOE ID NO.: MS-00694-VL
RUST GEOTECH INC. RECOMMENDATION
Based on the RUST Geotech Inc. evaluation, I recommend this property for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
ftfl Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental
standards were applied per 40 CFR 192.21.
Date
Program Manager
RUST Geotech Inc.
DOE EVALUATION
Certification Official
Department of Energy
1
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00694-VL
ADDRESS: PARCEL NO. A00200000200
MEADOWLARK LANE
MONTICELLO, UTAH 84535
NOVEMBER 1993
Prepared for
Environmental Restoration Program
Department of Energy
by
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
Harry A. Perry
Program Manager
RUST Geotech Inc. has been granted authorization to conduct remedial action under
the Environmental Restoration Program. Remedial action was done in accordance
with the U.S. Environmental Protection Agency "Standards for Cleanup of Land and
Buildings Contaminated with Residual Radioactive Materials from Inactive Uranium
Processing Sites," 40 CFR 192.12, 192.20-23.
TABLE OF CONTENTS
Section Pgqe
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Adtion 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
i
DOE ID NO.: MS-00694-VL
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Environmental Restoration Program with the primary objective of
reducing the potential hazard to the public due to long-term exposure to
low-level radioactivity associated with the offsite mill tailings derived from
the former U.S. Atomic Energy Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to provide
additional sources of vanadium needed during World War II. Various
government agencies operated the mill until 1947. The AEC obtained the
mill in 1948 and operated it through 1959 under cost-type contracts to
provide both uranium and vanadium. Mill operations were terminated on
January 1, 1960.
The mill processed approximately one million tons of ore during the AEC
operations. Throughout the operating period, mill tailings from the
Monticello millsite were removed from the site and used for construction-
related activities in the vicinity.
1.2 Criteria for Remedial Action
The Environmental Restoration Program adopted the "Standards for
Remedial Actions at Inactive Uranium Processing Sites" (40 CFR Part 192)
for all cleanup activities under the MVP Project. These standards were
prepared by the U.S. Environmental Protection Agency (EPA) to establish
guidelines for the control of tailings piles and the cleanup of buildings and
open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the EPA
standards. The Remedial Action Contractor was notified of the inclusion
of this property into the Environmental Restoration Program and was
authorized by the DOE to conduct remedial action as required to bring the
property into conformance with the EPA standards.
1
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
DOE ID NO.: MS-00694-VL
MS-00694-VL
Lot 20, Meadowlark Acres Subdivision, City
of Monticello, County of San Juan, State of
Utah
Parcel No. A00200000200
Meadowlark Lane
Monticello, Utah 84535

Vacant Lot (VL)
Not applicable; inclusion requested by the
Remedial Action Contractor
December 9, 1991
RUST Geotech Inc.
November 21, 1992
Crowley Construction, Inc.
East Route
Monticello, Utah
May 18, 1993
July 19, 1993
Interior: 0 cubic yards
Exterior: 82 cubic yards
413 square meters (m2)
November 1993
2
DOE ID NO.: MS-00694-VL
2:0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual radioactive
material (Appendix Figure 2.1). Once excavation was complete, the
affected areas were resurveyed for possible remaining residual radioactive
material and, upon attaining satisfactory results, were backfilled with
uncontaminated material. The property was restored to a physical
condition comparable to that which existed prior to remedial action
activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified contamination, 6 inches deep,
within the property. The remedial action process included the removal of
approximately 82 cubic yards of residual radioactive material,
6 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00694-VL
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by RUST Geotech Inc. during
June 1991, as described in the final REA dated November 1992.
Appendix Figure 2.1 shows the extent of assessed contamination
and identifies the areas recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to backfilling.
Following the gamma scan, soil samples representative of the
6-inch-thick soil layer at the bottom of the excavation were
collected. These samples were blended to form composite
samples representing the verification areas (Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 13 microroentgens per hour (//R/h)
to 17 //R/h (Appendix Figure 2.1). The results of analyses for
radium-226 in five composite soil samples ranged from
1.4 picocuries per gram (pCi/g) to 1.8 pCi/g (Appendix Table 3.1).
4
DOE ID NO.: MS-00694-VL
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by the EPA standards (40 CFR 192.12, 192.20-23),
as indicated in the Certification Data Summary below.
Therefore, the property located at Parcel No. A00200000200,
Meadowlark Lane, in Monticello, Utah, is recommended for certification
as required by the Environmental Restoration Program guidelines, and
the appropriate records should be documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Standards
Shall not exceed 20 //R/h
above background.
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Results
Not applicable:
vacant lot.
Not applicable:
vacant lot.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background* in the
15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below
the surface, averaged
over 100 m2.
< 5 pCi/g above
background.
Soil sample results
ranged from 1.4 pCi/g to
1.8 pCi/g.
•The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-
4.0 APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
MM-MRW: 11-02-93
MS-00694.VL WP51
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00694-VL
Address: Parcel No. A00200000200, Meadowlark Lane, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range (//R/h) Ticket No. Method* (pCi/g)
V-l 13 - 16 NCB 802 OCS 1.7
V-2 14 - 17 NCB 803 OCS 1.8
V-3 14 - 16 NCB 804 OCS 1.8
V-4 13 - 16 NCB 805 OCS 1.4
V-5 13-16 NCB 806 OCS 1.6
See Appendix Figure 2.1 for the verification areas.
•OCS = Opposed Crystal System
7
10
30
12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
30
28
26
24
22
20
18
1 6
14
12 -
MEADOWLARK LANE
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RM00694V 11/12/93 KWP/831
—- X
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40
J L
THIS DRAWING, PREPARED FOR THE ENVIRONMENTAL RESTORATION
PROGRAM. IS FOR THE SOLE USE OF THE U.S. DEPARTMENT OF
ENERGY AND ITS CONTRACTORS. IT IS NOT A LAND SURVEY PLAT,
UTILITY LOCATION PLAT. OR OTHER IMPROVEMENT SURVEY PLAT
AND IS NOT TO BE RELIED UPON FOR THE ESTABLISHMENT OF
FENCE, BUILDING, OR OTHER FUTURE IMPROVEMENT LINES.
12
V-1
16-17
LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN /xR/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
28
— 26
- 24
22
20
18
RADIOLOGICAL AS-BUILT
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
16
RESIDENCE-NO. Of OCCUPANTS
NON—RESIDENCE—MAN—HRS./WK.
INSTRUMENT NO.
SURVEY DATE
BY CK. A.C. APP.
1 4
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE, COLORADO
mi PARCEL NO. A00200000200
MEADOWLARK LANE
MONTICELLO, UTAH
12
APPROVAL
GEOTECH INC
APPROVAL OOE
DOE ID NO. MS-00694-VL
DWC.NO. 3-B00694-V1 SMT 1 or 1
10
10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS. INC.
GRAND JUNCTION OFFICE
P. 0. BOX 2567
GRANO JUNCTION. COLORADO 81502
F£B * S1994
Donald N. Leske
Project Manager, Monticello Projects
U.S. Department of Energy
P. 0. Box 2567
Grand Junction, 81502
Dear Mr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Gretchen A. Pierce
MVP/IVC Project Manager
Environmental Assessment Group
MS00694
A0020OOOO20O/ Meadowlark Lane
Monticello. Utah 84535

Vacant
Location Number:
Location Address:
Property Owner:
Owner Address:
Tenant Name:
Attachments
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
A«r2O000O2O0/ MEADOWLARK LANE
MONTICELLO, UTAH (MS00694)
A R. Jones
February 1994
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACXNOWLELXJMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from A00200000200/ Meadowlark
Lane, Monticello, Utah (MS00694) 5
v
ACXNOWJLEDGMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge M. K. Jensen for analysis of soil samples and J. R. Sauvage and T. L. Holmes
for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1993, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at
A00200000200/ Meadowlark Lane, Monticello, Utah. The Environmental
Technology Section (ETS) of Oak Ridge National Laboratory was assigned the
responsibility of verifying the data supporting the adequacy of remedial action and
confirming the site's compliance with DOE guidelines. The ETS found that the
site successfully meets the DOE remedial action objectives. Procedures used by
the ETS are described in the Environmental Technology Section Procedures
Manual (ORNL, 1993).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT A00200000200/ MEADOWLARK LANE
MONTICELLO, UTAH (MS00694)*
INTRODUCnON
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War II. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1,1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
""The verification of remedial action was performed by members of the Environmental
Assessment Group in the Environmental Technology Section of the Health Sciences Research
Division at Oak Ridge National Laboratory under DOE contract DE-AC05-84OR21400 with Martin
Marietta Energy Systems, Inc.
2
During 1993, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a vacant lot located at A00200000200/ Meadowlark Lane, Monticello, Utah.
The remedial action plan required excavation of all exterior contamination. When the
excavation was completed, the property was resurveyed, including soil sampling, to ensure
the removal of all contamination, backfilled with uncontaminated material, and restored to
a condition comparable to that which existed prior to remedial action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Environmental Technology Section (ETS) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the A00200000200/
Meadowlark Lane site. This report describes the methods and results of that verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 80 yd3 of mill tailings
6 inches deep. During the actual removal process, a total of 82 yd3 of contaminated earth
and uranium mill tailings, 6 inches deep were removed from a 413 m2 area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of a surface gamma scan with a scintillometer of
the exterior and soil sampling. Samples representative of the bottom 15-cm (6-in.) soil
layers of 5 excavated areas were collected and blended to form representative composite
soil samples for each verification area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Exterior surface gamma exposure rate measurements taken by Geotech from the
excavated areas prior to backfilling ranged from 13 to 17 uR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. These samples were blended to form a
composite soil sample representative of an average over the five exterior verification areas.
Geotech's analysis of this sample showed ^Ra concentrations of 1.4 to 1.8 pCi/g in the
composite sample. ORNL ETS obtained a percentage of this soil sample and performed a
confirmatory analysis, which showed ^Ra concentration of 1.9 to 2.7 pCi/g. These values
are below the DOE guideline value of 15 pCi/g for soil layers > 15 cm below the surface
(Table 1). Results of Geotech and ORNL soil sample analyses are given in Table 2.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to 222Rn Average annual radon proge- 0.03 WL
progeny ny concentration (including
background)
(DOE 1990)
5
Table 2. Results of ORNL analysis of Geotech soil samples
from A0020000020(y Meadowlark Lane, Monticello Utah (MS00694)
226Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No* (cm)
X2 NCB 803 >15 2.7 1.8
X5 NCB 806 >15 1.9 1.6
" An X-type sample is a split of the sample taken by the remedial action contractor.
h Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
6
REFERENCES
Abramiuk I. N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00694, Address: A00200000200/ Meadowlark Lane,
Monticello, Utah 84535, Geotech, Grand Junction, Colorado, November 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1993. Environmental Technology Section Procedures Manual. ORNL
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
DOE ID NO.: MS-00695-VL
Property Address: Parcel No. A00200000230, First South Meadowlark Lane
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
RUST Geotech Inc. of Energy (DOE)
YES NO NOT TAKEN YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2.
In-situ [ ] Lab [X]
Interior gamma is ^ 20 //R/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21.
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Environmental Restoration
Program (Rev. 03/02/87).
[X]* [ ] [ ]
[X] [ ] [ ]
[ ] [ 1 [X]
(Vacant Lot)
[ ] [X] [ ]
[ 1 [ ] [X]
[*l [ ]
[ ] [ ]
[ I
[rf
[ ] [ ] [X] [ ] [ ] 1*1
(Vacant Lot)
[ 1 [-4 [ ]
[ ] [ ] [JXl
COMMENTS: *The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
•iiiiiiiiH innniiniiH
SFCERT1 FED SFMS-09044
DOE ID NO.: MS-00695-VL
RUST GEOTECH INC. RECOMMENDATION
Based on the RUST Geotech Inc. evaluation, I recommend this property for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
[A] Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental
standards were applied per 40 CFR 192.21.
Program Manager
RUST Geotech Inc.
Date
DOE EVALUATION
Date
Certification Official
Department of Energy
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00695-VL
ADDRESS: PARCEL NO. A00200000230
FIRST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH 84535
NOVEMBER 1993
Prepared for
Environmental Restoration Program
Department of Energy
by
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
Waxxyk. Perry
Program Manager
RUST Geotech Inc. has been granted authorization to conduct remedial action under
the Environmental Restoration Program. Remedial action was done in accordance
with the U.S. Environmental Protection Agency "Standards for Cleanup of Land and
Buildings Contaminated with Residual Radioactive Materials from Inactive Uranium
Processing Sites," 40 CFR 192.12, 192.20-23.
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
DOE ID NO.: MS-00695-VL
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Environmental Restoration Program with the primary objective of
reducing the potential hazard to the public due to long-term exposure to
low-level radioactivity associated with the offsite mill tailings derived from
the former U.S. Atomic Energy Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to provide
additional sources of vanadium needed during World War II. Various
government agencies operated the mill until 1947. The AEC obtained the
mill in 1948 and operated it through 1959 under cost-type contracts to
provide both uranium and vanadium. Mill operations were terminated on
January 1, 1960.
The mill processed approximately one million tons of ore during the AEC
operations. Throughout the operating period, mill tailings from the
Monticello millsite were removed from the site and used for construction-
related activities in the vicinity.
1.2 Criteria for Remedial Action
The Environmental Restoration Program adopted the "Standards for
Remedial Actions at Inactive Uranium Processing Sites" (40 CFR Part 192)
for all cleanup activities under the MVP Project. These standards were
prepared by the U.S. Environmental Protection Agency (EPA) to establish
guidelines for the control of tailings piles and the cleanup of buildings and
open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the EPA
standards. The Remedial Action Contractor was notified of the inclusion
of this property into the Environmental Restoration Program and was
authorized by the DOE to conduct remedial action as required to bring the
property into conformance with the EPA standards.
1
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
DOE ID NO.: MS-00695-VL
MS-00695-VL
Lot 23, Meadowlark Acres Subdivision, City
of Monticello, County of San Juan, State of
Utah
Parcel No. A00200000230
First South Meadowlark Lane
Monticello, Utah 84535

Vacant Lot (VL)
Not applicable; inclusion requested by the
Remedial Action Contractor
December 9, 1991
RUST Geotech Inc.
November 21, 1992
Crowley Construction, Inc.
East Route
Monticello, Utah
May 18, 1993
July 19, 1993
Interior: 0 cubic yards
Exterior: 146 cubic yards
733 square meters (m2)
November 1993
2
DOE ID NO.: MS-00695-VL
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual radioactive
material (Appendix Figure 2.1). Once excavation was complete, the
affected area was resurveyed for possible remaining residual radioactive
material and, upon attaining satisfactory results, was backfilled with
uncontaminated material. The property was restored to a physical
condition comparable to that which existed prior to remedial action
activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified contamination, 6 inches deep,
within the property. The remedial action process included the removal of
approximately 146 cubic yards of residual radioactive material,
6 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00695-VL
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by RUST Geotech Inc. during
June 1991, as described in the final REA dated November 1992.
Appendix Figure 2.1 shows the extent of assessed contamination
and identifies the area recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to backfilling.
Following the gamma scan, soil samples representative of the
6-inch-thick soil layer at the bottom of the excavation were
collected. These samples were blended to form composite
samples representing the verification areas (Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 13 microroentgens per hour (//R/h)
to 21 //R/h (Appendix Figure 2.1). The results of analyses for
radium-226 in eight composite soil samples ranged from
1.4 picocuries per gram (pCi/g) to 3.3 pCi/g (Appendix Table 3.1).
4
DOE ID NO.: MS-00695-VL
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by the EPA standards (40 CFR 192.12, 192.20-23),
as indicated in the Certification Data Summary below.
Therefore, the property located at Parcel No. A00200000230, First
South Meadowlark Lane, in Monticello, Utah, is recommended for
certification as required by the Environmental Restoration Program
guidelines, and the appropriate records should be documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Standards
Shall not exceed 20 //R/h
above background.
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Results
Not applicable:
vacant lot.
Not applicable:
vacant lot.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background* in the
15-cm surface layer,
averaged over 100 ma.
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below
the surface, averaged
over 100 m2.
< 5 pCi/g above
background.
Soil sample results
ranged from 1.4 pCi/g to
3.3 pCi/g.
•The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00695-VL
4.0 APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
MM-MRW:11-02-93
MS-00695.VL WP51
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00695-VL
Address: Parcel No. A00200000230, First South Meadowlark Lane, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range (//R/h) Ticket No. Method* (pCi/g)
V-l 15 - 21 NCC 013 OCS 2.4
V-2 14 - 18 NCC 014 OCS 2.4
V-3 14 - 21 NCC 015 OCS 2.6
V-4 14 - 20 NCC 016 OCS 1.4
V-5 13-18 NCC 017 OCS 3.3
V-6 13 - 18 NCC 018 OCS 2.7
V-7 14 - 19 NCC 019 OCS 3.3
V-8 13 - 19 NCC 020 OCS 2.1
See Appendix Figure 2.1 for the verification areas.
•OCS = Opposed Crystal System
7
10
30
28
26
24
22
20
18
16
14
12
10
12
- NORTH
Y
14 1 6 18 20 22
© © V-6
s 13-18
©/{si V-5 V-8
13-18 13-19
V-4 V-7
14-20
14-19
<D: V-2
V-3 14-18
14-2
MM ©
13-16
© v-1
L
/rr ///
FIRST SOUTH MEADOWLARK LANE
SCALE IN FEET
24 26 28
20 10 0 20 40
THIS DRAWING, PREPARED FOR THE ENVIRONMENTAL RESTORATION
PROGRAM, IS FOR THE SOLE USE OF THE U.S. DEPARTMENT OF
ENERGY AND ITS CONTRACTORS. IT IS NOT A LAND SURVEY PLAT,
UTILITY LOCATION PLAT, OR OTHER IMPROVEMENT SURVEY PLAT
AND IS NOT TO BE RELIED UPON FOR THE ESTABLISHMENT OF
FENCE, BUILDING, OR OTHER FUTURE IMPROVEMENT LINES.
RM00695V 11/16/93 KWP/831
—- X
_! I I L .I L
30
©
<D
12-15
12
v-1
16-17
32 34 36 38
LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN //R/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
40
RADIOLOGICAL AS-BUILT
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
RESIDENCE-NO. OF OCCUPANTS
NON-RESIDENCC-UAN-HRS./WK.
INSTRUVENT NO.
SURVEY DATE
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE. COLORADO
^5
PARCEL NO. A00200000230
FIRST SOUTH
MEADOWLARK LANE
MONTICELLO, UTAH
GEOTECH INC
DATE APPROVAL DOE
DOE ID NO. MS-00695-VL
DWG.HO. 3-B0Q695-V1 SHT 1 nr 1
10 12 1 4 16 18 20 22 24 26 28 30 32 34 36 38 40
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS, INC.
GRAND JUNCTION OFFICE
P. 0. BOX 2567
GRANO JUNCTION. COLORADO 81502
FEB 2 0199*
Donald N. Leske
Project Manager, Monticello Projects
U.S. Department of Energy
P. 0. Box 2567
Grand Junction, 81502
Dear Mr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Gretchen A. Pierce
MVP/IVC Project Manager
Environmental Assessment Group
Location Number: MS00695
Location Address: A00200000230/ 1st South Meadowlark Lane
Monticello. Utah 84535
Property Owner:

Monticello. Utah 84535
Tenant Name: Vacant
Attachments
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
A00200000230/ 1ST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH (MS00695)
A R. Jones
February 1994
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
CONCLUSION 3
REFERENCES 6
iii
LEST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from A00200000230/ 1st South
Meadowlark Lane, Monticello, Utah (MS00695) 5
v
ACKNOATVI^IXTMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge M. K. Jensen for analysis of soil samples and J. R. Sauvage and T. L. Holmes
for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1993, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at
A00200000230/ 1st South Meadowlark Lane, Monticello, Utah. The
Environmental Technology Section (ETS) of Oak Ridge National Laboratory was
assigned the responsibility of verifying the data supporting the adequacy of
remedial action and confirming the site's compliance with DOE guidelines. The
ETS found that the site successfully meets the DOE remedial action objectives.
Procedures used by the ETS are described in the Environmental Technology
Section Procedures Manual (ORNL, 1993).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT A00200M0230/ 1ST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH (MS00695)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War U. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Environmental
Assessment Group in the Environmental Technology Section of the Health Sciences Research
Division at Oak Ridge National Laboratory under DOE contract DE-AC05-84OR21400 with Martin
Marietta Energy Systems, Inc.
2
During 1993, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a vacant lot located at A00200000230/ 1st South Meadowlark Lane,
Monticello, Utah. The remedial action plan required excavation of all exterior contamina-
tion. When the excavation was completed, the property was resurveyed, including soil
sampling, to ensure the removal of all contamination, backfilled with uncontaminated
material, and restored to a condition comparable to that which existed prior to remedial
action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Environmental Technology Section (ETS) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the A00200000230/
1st South Meadowlark Lane site. This report describes the methods and results of that
verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 133 yd3 of mill
tailings 6 inches deep. During the actual removal process, a total of 146 yd3 of
contaminated earth and uranium mill tailings, 6 inches deep were removed from a 733 m2
area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of a surface gamma scan with a scintillometer of
the exterior and soil sampling. Samples representative of the bottom 15-cm (6-in.) soil
layers of 8 excavated areas were collected and blended to form representative composite
soil samples for each verification area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Exterior surface gamma exposure rate measurements taken by Geotech from the
excavated areas prior to backfilling ranged from 13 to 21 /iR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. These samples were blended to form a
composite soil sample representative of an average over the 8 exterior verification areas.
Geotech's analysis of this sample showed a ^Ra concentration of 1.4 to 3.3 pCi/g in the
composite sample. ORNL ETS obtained a percentage of this soil sample and performed a
confirmatory analysis, which showed a ^Ra concentration of 2,9 to 3.6 pCi/g. These
values are below the DOE guideline value of 15 pCi/g for soil layers >15 cm below the
surface (Table 1). Results of Geotech and ORNL soil sample analyses are given in
Table 2.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to 222Rn
progeny
Average annual radon proge-
ny concentration (including
background)
0.03 WL
(DOE 1990)
5
Table 2. Results of ORNL analysis of Geotech soil samples
from A00200000230/ 1st South Meadowlark Lane, Monticello Utah (MSO0695)
226Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No.' (cm)
X2 NCC 014 >15 3.6 2,4
X6 NCC 018 >15 2.9 2,7
b
An X-type sample is a split of the sample taken by the remedial action contractor.
Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
6
REFERENCES
Abramiuk I. N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00695, Address: A00200000230/ 1st South Meadowlark
Lane, Monticello, Utah 84535, Geotech, Grand Junction, Colorado, November
1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1993. Environmental Technology Section Procedures Manual ORNL
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
DOE ID NO.: MS-00696-VL
Property Address: Parcel No. A00200000240, First South Meadowlark Lane
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
RUST Geotech Inc. of Energy (DOE)
YES NO NOT TAKEN YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2.
In-situ [ ] Lab [X]
Interior gamma is < 20 /yR/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21.
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Environmental Restoration
Program (Rev. 03/02/87).
[X]* [ ] [ ]
[X] [ ] [ ]
[ ] [ ] [X]
(Vacant Lot)
[ ] [X] [ ]
LX] [ 1 [ 1
[/] [ ] I 1
[ 1 [ ]
[ ] [ ] [X] [ ] [ ] [tf
(Vacant Lot)
[ ] [X] [ 1
[ 1 [ ] [X] [ ] [ ] M
COMMENTS: *The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
lllliillN
SFCERTI FED •III
SFMS-09044
DOE ID NO.: MS-00696-VL
RUST GEOTECH INC. RECOMMENDATION
Based on the RUST Geotech Inc. evaluation, I recommend this property for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
A arry Date
Program Manager
RUST Geotech Inc.
DOE EVALUATION
[A Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental
standards were applied per 40 CFR 192.21.
A
Environmental Restoration Program
Certification Official
Department of Energy
Date
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00696-VL
ADDRESS: PARCEL NO. A00200000240
FIRST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH 84535
NOVEMBER 1993
Prepared for
Environmental Restoration Program
Department of Energy
RUST Geotech Inc. has been granted authorization to conduct remedial action under
the Environmental Restoration Program. Remedial action was done in accordance
with the U.S. Environmental Protection Agency "Standards for Cleanup of Land and
Buildings Contaminated with Residual Radioactive Materials from Inactive Uranium
Processing Sites," 40 CFR 192.12, 192.20-23.
by
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
i
DOE ID NO.: MS-00696-VL
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Environmental Restoration Program with the primary objective of
reducing the potential hazard to the public due to long-term exposure to
low-level radioactivity associated with the offsite mill tailings derived from
the former U.S. Atomic Energy Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to provide
additional sources of vanadium needed during World War II. Various
government agencies operated the mill until 1947. The AEC obtained the
mill in 1948 and operated it through 1959 under cost-type contracts to
provide both uranium and vanadium. Mill operations were terminated on
January 1, 1960.
The mill processed approximately one million tons of ore during the AEC
operations. Throughout the operating period, mill tailings from the
Monticello millsite were removed from the site and used for construction-
related activities in the vicinity.
1.2 Criteria for Remedial Action
The Environmental Restoration Program adopted the "Standards for
Remedial Actions at Inactive Uranium Processing Sites" (40 CFR Part 192)
for all cleanup activities under the MVP Project. These standards were
prepared by the U.S. Environmental Protection Agency (EPA) to establish
guidelines for the control of tailings piles and the cleanup of buildings and
open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the EPA
standards. The Remedial Action Contractor was notified of the inclusion
of this property into the Environmental Restoration Program and was
authorized by the DOE to conduct remedial action as required to bring the
property into conformance with the EPA standards.
1
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
DOE ID NO.: MS-00696-VL
MS-00696-VL
Lot 24, Meadowlark Acres Subdivision, City
of Monticello, County of San Juan, State of
Utah
Parcel No. A00200000240
First South Meadowlark Lane
Monticello, Utah 84535

Vacant Lot (VL)
Not applicable; inclusion requested by the
Remedial Action Contractor
December 9, 1991
RUST Geotech Inc.
November 21, 1992
Crowley Construction, Inc.
East Route
Monticello, Utah
May 18, 1993
July 19, 1993
Interior: 0 cubic yards
Exterior: 180 cubic yards
873 square meters (ma)
November 1993
2
DOE ID NO.: MS-00696-VL
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual radioactive
material (Appendix Figure 2.1). Once excavation was complete, the
affected area was resurveyed for possible remaining residual radioactive
material and, upon attaining satisfactory results, was backfilled with
uncontaminated material. The property was restored to a physical
condition comparable to that which existed prior to remedial action
activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified contamination, ranging from
6 inches to 12 inches deep, within the property. The remedial action
process included the removal of approximately 180 cubic yards of residual
radioactive material, ranging from 6 inches to 12 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00696-VL
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by RUST Geotech Inc. during
June 1991, as described in the final REA dated November 1992.
Appendix Figure 2.1 shows the extent of assessed contamination
and identifies the area recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to backfilling.
Following the gamma scan, soil samples representative of the
6-inch-thick soil layer at the bottom of the excavation were
collected. These samples were blended to form composite
samples representing the verification areas (Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 13 microroentgens per hour (//R/h)
to 21 //R/h (Appendix Figure 2.1). The results of analyses for
radium-226 in 11 composite soil samples ranged from
2.1 picocuries per gram (pCi/g) to 7.5 pCi/g (Appendix Table 3.1).
4
DOE ID NO.: MS-00696-VL
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by the EPA standards (40 CFR 192.12, 192.20-23),
as indicated in the Certification Data Summary below.
Therefore, the property located at Parcel No. A00200000240, First
South Meadowlark Lane, in Monticello, Utah, is recommended for
certification as required by the Environmental Restoration Program
guidelines, and the appropriate records should be documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Standards
Shall not exceed 20 //R/h
above background.
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Results
Not applicable:
vacant lot.
Not applicable:
vacant lot.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background* in the
15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below
the surface, averaged
over 100 m2.
< 5 pCi/g above
background.
Soil sample results
ranged from 2.1 pCi/g
to 7.5 pCi/g.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00696-VL
4.0 APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
MM-MRW: 11-02-93
MS-00696.VL WP51
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00696-VL
Address: Parcel No. A00200000240, First South Meadowlark Lane, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range (//R/h) Ticket No. Method* (pCi/g)
V-l 13 - 19 NCC 021 OCS 2.4
V-2 15 - 19 NCC 022 OCS 4.7
V-3 15 - 21 NCC 023 OCS 4.2
V-4 13 - 18 NCC 024 OCS 2.7
V-5 15 - 21 NCC 025 OCS 4.6
V-6 15 - 20 NCC 026 OCS 7.5
V-7 15 - 19 NCC 027 OCS 3.8
V-8 14 - 18 NCA 288 OCS 2.7
V-9 15-18 NCA 289 OCS 2.1
V-10 15 - 19 NCA 290 OCS 3.6
V-ll 15 - 20 NCA 291 OCS 2.3
See Appendix Figure 2.1 for the verification areas.
*OCS = Opposed Crystal System
7
10
30 i—
12 1 4 16 18 20 22 24 26 28 30 32 34 36 38 40
30
28
26
24
22
20
18
16
1 4
12 -
Y
NORTH
•V
V-2 V-4 V-3
15-19 3-8 15-21
©
©0 © ©
V-6 V-5 V-7
15-20 15-21 15-19
B© 12 © ©
V-8 V-1 1 V-9 V-10
14-18 15-20 15-18 15-19
1 2
:>© 1 2
16-20 I 12)- - • 6 • •
. J •r
T7T
FIRST SOUTH MEADOWLARK LANE
SCALE IN FEET
20 10 0 20 40
, THIS DRAWING, PREPARED FOR THE ENVIRONMENTAL RESTORATION
PROGRAM. IS FOR THE SOLE USE OF THE U.S. DEPARTMENT OF
ENERGY AND ITS CONTRACTORS. IT IS NOT A LAND SURVEY PLAT,
UTILITY LOCATION PLAT, OR OTHER IMPROVEMENT SURVEY PLAT
AND IS NOT TO BE RELIED UPON FOR THE ESTABLISHMENT OF
FENCE, BUILDING, OR OTHER FUTURE IMPROVEMENT LINES.
RM00696V 11/16/93 KWP/831
—— X
10 J L J L
I 1
I I
12-15
1 2
V-1
16-17
LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN ^R/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
28
26
24
22
20
18
RADIOLOGICAL AS-BUILT
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
16
RESIDENCE-NO. OF OCCUPANTS
NON-RESIDENCE-UAN-HRS./WK.
INSTRUMENT NO.
A.E. APP. NO. DATE CK. A.E. APP,
14
te:
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE, COLORADO
H/ff life
PARCEL NO. A00200000240
FIRST SOUTH
MEADOWLARK LANE
MONTICELLO, UTAH
12
GEOTECH INC
"BATE" APPROVAL DOE
DOE ID NO. MS-00696-VL
DW8N03-B00696-V1 SHT.1 or1 10
10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS. INC.
GRANO JUNCTION OFFICE
P. 0. BOX 2567
GRAND JUNCTION, COLORADO 81502
FEB 2 S199*
Donald N. Leske
Project Manager, Monticello Projects
U.S. Department of Energy
P. 0. Box 2567
Grand Junction, 81502
Dear Mr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Gretchen A. Pierce
MVP/IVC Project Manager
Environmental Assessment Group
MS00696
A00200000240/ 1st South Meadowlark Lane
Monticello. Utah 84535

Monticello. Utah 84535
Tenant Name: Vacant
Location Number:
Location Address:
Property Owner:
Owner Address:
Attachments
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
A00200000240/ 1ST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH (MS00696)
A R. Jones
February 1994
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from A00200000240/ 1st South
Meadowlark Lane, Monticello, Utah (MS00696) 5
v
ACKNOWIJELXJMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge M. K. Jensen for analysis of soil samples and J. R. Sauvage and T. L. Holmes
for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1993, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at
A00200000240/ 1st South Meadowlark Lane, Monticello, Utah. The
Environmental Technology Section (ETS) of Oak Ridge National Laboratory was
assigned the responsibility of verifying the data supporting the adequacy of
remedial action and confirming the site's compliance with DOE guidelines. The
ETS found that the site successfully meets the DOE remedial action objectives.
Procedures used by the ETS are described in the Environmental Technology
Section Procedures Manual (ORNL, 1993).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT A00200000240/ 1ST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH (MS00696)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War II. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Environmental
Assessment Group in the Environmental Technology Section of the Health Sciences Research
Division at Oak Ridge National Laboratory under DOE contract DE-AC05-84OR21400 with Martin
Marietta Energy Systems, Inc.
2
During 1993, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a vacant lot located at A00200000240/ 1st South Meadowlark Lane,
Monticello, Utah. The remedial action plan required excavation of all exterior contamina-
tion. When the excavation was completed, the property was resurveyed, including soil
sampling, to ensure the removal of all contamination, backfilled with uncontaminated
material, and restored to a condition comparable to that which existed prior to remedial
action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Environmental Technology Section (ETS) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the A00200000240/
1st South Meadowlark Lane site. This report describes the methods and results of that
verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 170 yd3 of mill
tailings 6 to 12 inches deep. During the actual removal process, a total of 180 yd3 of
contaminated earth and uranium mill tailings, 6 to 12 inches deep were removed from a
873 m2 area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of a surface gamma scan with a scintillometer of
the exterior and soil sampling. Samples representative of the bottom 15-cm (6-in.) soil
layers of 11 excavated areas were collected and blended to form representative composite
soil samples for each verification area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Exterior surface gamma exposure rate measurements taken by Geotech from the
excavated areas prior to backfilling ranged from 13 to 21 /iR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. These samples were blended to form a
composite soil sample representative of an average over the 11 exterior verification areas.
Geotech's analysis of this sample showed ^Ra concentrations of 2.1 to 7.5 pCi/g in the
composite sample. ORNL ETS obtained a percentage of this soil sample and performed a
confirmatory analysis, which showed ^Ra concentrations of 5.8 to 6.0 pCi/g. These values
are below the DOE guideline value of 15 pCi/g for soil layers >15 cm below the surface
(Table 1). Results of Geotech and ORNL soil sample analyses are given in Table 2.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Exposure to ^Rn
progeny
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
Average annual radon proge-
ny concentration (including
background)
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
0.03 WL
(DOE 1990)
5
Table 2. Results of ORNL analysis of Geotech soil samples
from A0020TJ000240/ 1st South Meadowlark Lane, Monticello Utah (MS00696)
^Ra concentration (pCi/g)
ORNL Geotech "
sample sample Depth ORNL Geotech
No." No.* (cm)
X3 NCC 023 >15 6.0 4.2
XI1 NCA 291 >15 5.8 2,3
" An X-type sample is a split of the sample taken by the remedial action contractor.
b Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
6
REFERENCES
Abramiuk I. N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Properly Remedial
Action for DOE ID NO: MS00696, Address: A0020000024011st South Meadowlark
Lane, Monticello, Utah 84535, Geotech, Grand Junction, Colorado, November
1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1993. Environmental Technology Section Procedures Manual. ORNL
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
3
DOE ID NO.: HS
Property Address: First Soutu iy\e.adouilAtK /.<t«e_
Pcrcei Mo.: f^OOZOOdOOZlO
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
Chem-Nuclear Geotech. Inc.
YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab { ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 ma.
In-situ [ ] Lab fx;]
Interior gamma is < 20 ^R/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21.
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Decontamination and
Decommissioning Program
(Rev. 03/02/87).
[X]<
I ]
[ ]
[ 1
[ ] t ]
[ ] t J
[ 1 [X]
(Vacant Lot)
t J tX]
(Vacant Lot)
JXJ [ ]
U.S. Department
of Enerov fDOEl
YES NO NOT TAKEN
l<] t 3 t J
t 3 t i [yj
t 3 t i r^j
[ J tf) t 3
( 3 t 3 CX [ 1 [ J f<J
COMMENTS: *The excavations were backfilled with materials that were measured
at the source showing that the Ra-226 concentrations are in the ranoe of
normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
am
SFCERT1 FED gnniiiiii
SFMS-00697
DOE ID NO.: MS- frOk'll - \< U
CHEM-NUCLEAR GEOTECH, INC., RECOMMENDATION
Based on the Chem-Nuclear Geotech, Inc., evaluation, I recommend this property
for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
arry Irfy 7 Date
Decontamination and Decommissioning Program Manager
Chem-Nuclear Geotech, Inc.
DOE EVALUATION
tj<] Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental standards
were applied per 40 CFR 192.21.
Decontamination and Decommi.ooiqning Program Date
Certification Official
Department of Energy
MAR
4CL
RECORDS MANA&MENT
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00697-VL
ADDRESS: PARCEL NO. A00200000270, FIRST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH 84535
MARCH 1993
Prepared for
Decontamination and Decommissioning Program
Division of Facilities and Site Decommissioning
Department of Energy
by
Chem-Nuclear Geotech, Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
2^:
Harry''A. Perry
Program Director
Chem-Nuclear Geotech, Inc., has been granted authorization to conduct remedial
action under the Decontamination and Decommissioning Program. Remedial action
was done in accordance with the Environmental Protection Agency Standards for
Cleanup of Lands and Buildings Contaminated with Residual Radioactive Material
from Inactive Uranium Processing Sites, 40 CFR 192.12, 192.20-23.
iininiiii
SFOCPLRPTS llllllllill
SFMS-09043
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action . 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
i
DOE ID NO.: MS-00697-VL
1.0 SUMMARY
1.1 Basis for Reaedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Decontamination and Decommissioning Program with the primary
objective of reducing the potential hazard to the public due to
long-term exposure to low-level radioactivity associated with the
offsite mill tailings derived from the former U.S. Atomic Energy
Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to
provide additional sources of vanadium needed during World War II.
Various government agencies operated the mill until 1947. The AEC
obtained the mill in 1948 and operated it through 1959 under cost-
type contracts to provide both uranium and vanadium. Mill
operations were terminated on January 1, 1960.
The mill processed approximately one million tons of ore during the
AEC operations. Throughout the operating period, mill tailings from
the Monticello millsite were removed from the site and used for
construction-related activities in the vicinity.
1.2 Criteria for Remedial Action
The Decontamination and Decommissioning Program adopted the
"Standards for Remedial Action at Inactive Uranium Processing Sites"
(40 CFR Part 192) for all cleanup activities under the MVP Project.
These standards were prepared by the U.S. Environmental Protection
Agency (EPA) to establish guidelines for the control of tailings
piles and the cleanup of buildings and open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the
EPA standards. The Remedial Action Contractor was notified of the
inclusion of this property into the Decontamination and
Decommissioning Program and was authorized by the DOE to conduct
remedial action as required to bring the property into conformance
with the EPA standards.
1
1.3 Summary of Reaedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construct ion Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
DOE ID NO.: MS-00697-VL
MS-00697-VL
Lot 27, Meadowlark Acres Subdivision,
City of Monticello, County of San Juan,
State of Utah
Parcel No. A00200000270,
First South Meadowlark Lane
Monticello, Utah 84535

Vacant Lot (VL)
Not applicable; inclusion requested by
the Remedial Action Contractor
December 9, 1991
Chem-Nuclear Geotech, Inc.
April 3, 1992
DLB Unlimited, Inc.
P.O. Box 40513
Grand Junction, Colorado
August 31, 1992
October 28, 1992
Interior: 0 cubic yards
Exterior: 205 cubic yards
1,028 square meters (ms)
March 1993
2
DOE ID NO.: MS-00697-VL
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual
radioactive material (Appendix Figure 2.1). Once excavation was
complete, the affected area was resurveyed for possible remaining
residual radioactive material and, upon attaining satisfactory
results, was backfilled with uncontaminated material. The property
was restored to a condition comparable to that which existed prior to
remedial action activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified contamination, 6 inches deep,
within the property. The remedial action process included the removal
of approximately 205 cubic yards of residual radioactive material,
6 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00697-VL
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-ReMdial Action Survey
A radiological survey was conducted by Chem-Nuclear
Geotech, Inc., during May 1991, as described in the final REA
dated April 1992. Appendix Figure 2.1 shows the extent of
assessed contamination and identifies the area recommended to
undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to
backfilling. Following the gamma scan, soil samples
representative of the 6-inch-thick soil layer at the bottom of
the excavation were collected. These samples were blended to
form composite samples representing the verification areas
(Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined
during the gamma scan, ranged from 13 microroentgens per
hour (uR/h) to 17 uR/h (Appendix Figure 2.1). The results of
analyses for radium-226 in 12 composite soil samples ranged
from 1.0 picocurie per gram (pCi/g) to 3.1 pCi/g (Appendix
Table 3.1).
4
DOE ID NO.: MS-00697-VL
3.2 Rec mdation for Certification
Residual radioactive materials have been removed from this property
to the extent required by the EPA standards (40 CFR 192.12,
192.20-23), as indicated in the Certification Data Summary below.
Therefore, the property located at Parcel No. A00200000270, First
South Meadowlark Lane, in Monticello, Utah, is recommended for
certification as required by the Decontamination and
Decommissioning Program guidelines, and the appropriate records
should be documented.
Certification Data Summary
Applicability Standards Survey Results
Habitable Structures
Exposure Rate: Shall not exceed 20 pR/h
above background.
Not applicable:
vacant lot.
Radon Decay-Product
Concentration:
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Not applicable:
vacant lot.
Land
Radium-226 Concentration
in Surface Soil:
Shall not exceed 5 pCi/g
above background* in the
15-cm surface layer,
averaged over 100 m3.
< 5 pCi/g above
background.
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below the
surface, averaged over
100 m».
Soil sample results
ranged from 1.0 pCi/g
to 3.1 pCi/g.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00697-VL
4.0 APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00697-VL
Address: Parcel No. A00200000270, First South Meadowlark Lane, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range (uR/h) Ticket No. Method* (pCi/g)
V-l 14 - 17 NAW 361 OCS 2.5
V-2 13 - 17 NAW 362 OCS 2.0
V-3 13 - 17 NAW 363 OCS 3.1
V-4 13 - 15 NAX 684 OCS 1.2
V-5 13 - 17 NAX 685 OCS 2.0
V-6 13 - 16 NAX 686 OCS 1.0
V-7 14 - 16 NAX 687 OCS 1.0
V-8 13 - 16 NAX 688 OCS 1.6
V-9 13 - 16 NAX 689 OCS 2.0
V-10 13 - 16 NAX 735 OCS 1.4
V-ll 13 - 17 NAX 736 OCS 1.8
V-12 13 - 16 NAX 737 OCS 1.3
See Appendix Figure 2.1 for the verification areas.
*OCS = Opposed Crystal System
MM-JEK:03-08-93
MS-00697.VL WP51
REV032293
7
10 24 QO 34 38 40 -+
26
18
16
14
+
14-15-
V-1
14-17
JJJ.
FIRST SOUTH MEADOWLARK LANE
•••:•:•:•:-:< e >;•;•;•;•;•:
..Hi
V-4
13-15
is:
V-8
13-16
6 \
V-7
14-16
i t v.*.* i v*.*.*/ %
V-5
13-17
•; V-10
13-16
mm
12-15
12
26
LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN yR/h.
ASSESSED AREA IDENTIFIER:
AVERAGE :DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION ...j j
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION '::::
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION - - -
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE •
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION .
24
22
20
18
RADIOLOGICAL^ AS4BiyiUT
!-FIGURE 2.T
EXTERIOR EXTENT OF CONTAMINATION
16
.:..SCALE IN. FEET
:20 .:.10 .:.0 ..:..
RM0Oft97V 03/08/93 T529
i i i L
14 16
i 20 40
•THIS DRAWING. PREPARED: FOR THE DECONTAMINATION AND
..^DECOMMISSIONING PROGRAM. IS FOR THE SOLE USE OF THE
:U.S. DEPARTMENT OF ENERGY AND;ITS CONTRACTORS. IT IS
:NOT A LAND SURVEY PLAT; UTILITY :LOCATION PLAT. OR OTHER
IMPROVEMENT SURVEY PLAT AND IS NOT TO^BE RELIED UPON[
...[FOR THE ESTABLISHMENT OF FENCE. BUILDING. OR OTHER .
:FUTURE IMPROVEMENT LINES.
18 22 24
1
NO. DATE
RESIDENCE—NO. OF OCCUPANTS
NON-RESIOENCE—MAN-HRS./WK.
INSTRUMENT NO. SURVEYOR
SURVEY OATE
VERIFICATION
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE, COLORADO
£31
4> 3 93
PARCEL NO. A00200000270
FIRST SOUTH MEADOWLARK LN.
MONTICELLO, UTAH
12
APPROVAL APPROVAL DOE
MS-00697-VL
26 30 32 34
3-BQQ697-V1«HT1 ™ 1
36 38
GRAND JUNCTION OFFICE
P. 0. BOX 2567
GRAND JUNCTION. COLORADO 81502
JUN 2 31993
Donald N. Leske
Grand Junction Office
U.S. Department of Energy
2597 B 3/4 Road
P.O. Box 2567
Grand Junction, CO 81502
Dear Mr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil, indoor radon daughter
concentration, and indoor gamma exposure rate at this property.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
i
Gretchen A. Pierce
Pollutant Assessments Group
MS00697
A0020000027Q
1st South Meadowlark Lane
Monticello. Utah 84535

Monticello. Utah 84535
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS, INC.
Location Number:
Location Address:
Property Owner:
Owner Address:
Attachments
HEALTH AND SAFETY RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
A00200W0270,1ST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH (MS00697)
S.K. Mather
June 1993
Work performed by the
POLLUTANT ASSESSMENTS GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIHCATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from A00200000270, 1st South
Meadowlark Lane, Monticello, Utah (MS00697) 5
v
ACKNOWLEDGMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge G. A Pierce for analysis of soil samples and M.K Jensen and AR.
Jones for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1992, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at
A00200000270, 1st South Meadowlark Lane, Monticello, Utah. The Pollutant
Assessments Group (PAG) of Oak Ridge National Laboratory was assigned the
responsibility of verifying the data supporting the adequacy of remedial action and
confirming the site's compliance with DOE guidelines. The PAG found that the
site successfully meets the DOE remedial action objectives. Procedures used by
the PAG are described in the Pollutant Assessments Group Procedures Manual
(ORNL, 1992).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT A00200000270, 1st SOUTH MEADOWLARK LANE
MONTICELLO, UTAH (MS00697)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War IL Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Pollutant Assessments
Group of the Health and Safety Research Division at Oak Ridge National Laboratory under DOE
contract DE-AC05-84OR21400 with Martin Marietta Energy Systems, Inc.
2
During 1992, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a vacant lot located at A002000(X)270, 1st South Meadowlark Lane,
Monticello, Utah. The remedial action plan required excavation of all exterior contamina-
tion. When the excavation was completed, the property was resurveyed, including soil
sampling, to ensure the removal of all contamination, backfilled with uncontaminated
material, and restored to a condition comparable to that which existed prior to remedial
action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Pollutant Assessments Group (PAG) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the A00200000270,
1st South Meadowlark Lane site. This report describes the methods and results of that
verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 205 yd3 of mill
tailings 6 inches deep. During the actual removal process, a total of 205 yd3 of
contaminated earth and uranium mill tailings, 6 inches deep were removed from a 1,028
m2 area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of gamma scans with a scintillometer, ground-level
and basement scans of the building and a surface scan of the exterior and soil sampling.
Samples representative of the bottom 15-cm (6-in.) soil layers of 12 excavated areas were
collected and blended to form representative composite soil samples for each verification
area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Exterior surface gamma measurements taken by Geotech from the excavated areas
prior to backfilling ranged from 13 to 17 uR/h.
SoH Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. There were 12 excavated areas for this
property. Geotech's analysis of these samples showed ^Ra concentrations from 1.0 to 3.1
pCi/g in the composite samples. ORNL PAG obtained a percentage of these soil samples
and performed a confirmatory analysis, which showed ^Ra concentrations from 1.6 to 2.8
pCi/g. These values are below the DOE guideline value of 15 pCi/g for soil layers > 15
cm below the surface (Table 1). Results of Geotech and ORNL soil sample analyses are
given in Table 2.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
One minor discrepancy was noted in that the DOE inclusion letter was not located in the
folio.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to ^Rn
progeny
Average annual radon proge-
ny concentration (including
background)
0.03 WL
(DOE 1990)
5
Table 2. Results of ORNL analysis of Geotech soil samples
from A00200000270, 1st South Meadowlark Lane, Monticello Utah (MS00697)
^"Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No.* (cm)
X3 NAW-363 15-30 2.8 3.1
X5 NAX-685 15-30 1.6 2.0
XI1 NAX-736 15-30 1.8 1.8
" An X-type sample is a split of the sample taken by the remedial action contractor.
Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
6
REFERENCES
Abramiuk I. N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00697, Address: A00200000270, 1st South Meadowlark
Lane, Monticello, Utah 84535, Geotech, Grand Junction, Colorado, March 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1992. Pollutant Assessments Group Procedures Manual. ORNL/TM-
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
f f *
DOE ID NO. , MS— nbAlA - VL-
Property Address: F>'rS"t ^ovtly tA%_Gc$Q^\*f£ L&V*SL-~*
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
Chem-Nuclear Geotech. Inc.
YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 ma. [X]* [ ] [ ]
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m*. £>J [ ] [ ]
In-situ [ ] Lab fx]
Interior gamma is < 20 pR/h
above background in any
occupied or habitable
structure. [ ]
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level. [ ]
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21. [ ] fx] [ ]
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Decontamination and
Decommissioning Program
(Rev. 03/02/87). [ ] [ ] £xj
[ 3 tx]
(Vacant Lot)
[ ] [X]
(Vacant Lot)
U.S. Department
of Enerov (DOE!
YES NO NOT TAKEN
bC] f ] [ ]
t 3
[ ]
[ )
[ 1
[ }
[ ]
[ 1
[ 1
( ] C ] I*]
COMMENTS: *The excavations were backfilled with materials that were measured
at the source showing that the Ra-226 concentrations are in the range of
normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
SFCERTI FED SFMS-00698 RECORDS MANAGEMENT
DOB ID NO.: MS- OQ(o^% " V
CHEM-NUCLEAR GEOTECH, INC., RECOMMENDATION
Based on the Chem-Nuclear Geotech, Inc., evaluation, I recommend this property
for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
3/r?M
Decontamination and Decommissioning Program Manager
Chem-Nuclear Geotech, Inc.
DOE EVALUATION
\£\ Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental standards
were applied per 40 CFR 192.21.
Decontamination and Decommissiprr^ng1 Program Date
Certification Official
Department of Energy
MAR 19 1993
RECORDS MANAGEMENT
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00698-VL
ADDRESS: PARCEL NO. A00200000280, FIRST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH 84535
MARCH 1993
Prepared for
Decontamination and Decommissioning Program
Division of Facilities and Site Decommissioning
Department of Energy
by
Chem-Nuclear Geotech, Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
' Harr#} Perry
Program Director
Chem-Nuclear Geotech, Inc., has been granted authorization to conduct remedial
action under the Decontamination and Decommissioning Program. Remedial action
was done in accordance with the Environmental Protection Agency Standards for
Cleanup of Lands and Buildings Contaminated with Residual Radioactive Material
from Inactive Uranium Processing Sites, 40 CFR 192.12, 192.20-23.
minium SFOCPLRPTS
lillllilll
SFMS-09043
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
DOE ID NO.: MS-00698-VL
1.0 SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Decontamination and Decommissioning Program with the primary
objective of reducing the potential hazard to the public due to
long-term exposure to low-level radioactivity associated with the
offsite mill tailings derived from the former U.S. Atomic Energy
Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to
provide additional sources of vanadium needed during World War II.
Various government agencies operated the mill until 1947. The AEC
obtained the mill in 1948 and operated it through 1959 under cost-
type contracts to provide both uranium and vanadium. Mill
operations were terminated on January 1, 1960.
The mill processed approximately one million tons of ore during the
AEC operations. Throughout the operating period, mill tailings from
the Monticello millsite were removed from the site and used for
construction-related activities in the vicinity.
1.2 Criteria for Remedial Action
The Decontamination and Decommissioning Program adopted the
"Standards for Remedial Action at Inactive Uranium Processing Sites"
(40 CFR Part 192) for all cleanup activities under the MVP Project.
These standards were prepared by the U.S. Environmental Protection
Agency (EPA) to establish guidelines for the control of tailings
piles and the cleanup of buildings and open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the
EPA standards. The Remedial Action Contractor was notified of the
inclusion of this property into the Decontamination and
Decommissioning Program and was authorized by the DOE to conduct
remedial action as required to bring the property into conformance
with the EPA standards.
1
1.3 SuauMiy of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
DOE ID NO.: MS-00698-VL
MS-00698-VL
Lot 28, Meadowlark Acres Subdivision,
City of Monticello, County of San Juan,
State of Utah
Parcel No. A00200000280,
First South Meadowlark Lane
Monticello, Utah 84535

Vacant Lot (VL)
Not applicable; inclusion requested by
the Remedial Action Contractor
December 9, 1991
Chem-Nuclear Geotech, Inc.
April 3, 1992
DLB Unlimited, Inc.
P.O. Box 40513
Grand Junction, Colorado
August 31, 1992
October 28, 1992
Interior: 0 cubic yards
Exterior: 200 cubic yards
1,004 square meters (m3)
March 1993
2
DOE ID NO.: MS-00698-VL
2.0 OPERATIONS SUNMART
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual
radioactive material (Appendix Figure 2.1). Once excavation was
complete, the affected area was resurveyed for possible remaining
residual radioactive material and, upon attaining satisfactory
results, was backfilled with uncontaminated material. The property
was restored to a condition comparable to that which existed prior to
remedial action activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified contamination, 6 inches deep,
within the property. The remedial action process included the removal
of approximately 200 cubic yards of residual radioactive material,
6 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00698-VL
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Reaedial Action Survey
A radiological survey was conducted by Chem-Nuclear
Geotech, Inc., during May 1991, as described in the final REA
dated April 1992. Appendix Figure 2.1 shows the extent of
assessed contamination and identifies the area recommended to
undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to
backfilling. Following the gamma scan, soil samples
representative of the 6-inch-thick soil layer at the bottom of
the excavation were collected. These samples were blended to
form composite samples representing the verification areas
(Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined
during the gamma scan, ranged from 13 microroentgens per
hour (uR/h) to 18 uR/h (Appendix Figure 2.1). The results of
analyses for radium-226 in 11 composite soil samples ranged
from 1.2 picocuries per gram (pCi/g) to 2.4 pCi/g (Appendix
Table 3.1).
4
DOE ID NO.: MS-00698-VL
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property
to the extent required by the EPA standards (40 CFR 192.12,
192.20-23), as indicated in the Certification Data Summary below.
Therefore, the property located at Parcel No. A00200000280, First
South Meadowlark Lane, in Monticello, Utah, is recommended for
certification as required by the Decontamination and
Decommissioning Program guidelines, and the appropriate records
should be documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentrat ion:
Standards
Shall not exceed 20 uR/h
above background.
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
0.03 WL.
Survey Results
Not applicable:
vacant lot.
Not applicable:
vacant lot.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background* in the
15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below the
surface, averaged over
100 m*.
< 5 pCi/g above
background.
Soil sample results
ranged from 1.2 pCi/g
to 2.4 pCi/g.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00698-VL
4.0 APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BDILT
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00698-VL
Address: Parcel No. A00200000280, First South Meadowlark Lane, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range (uR/h) Ticket No. Method* (pCi/g)
V-l 13 - 16 NAX 738 OCS 2.0
V-2 13 - 17 NAX 739 OCS 1.3
V-3 14 - 17 NAX 473 OCS 1.9
V-4 13 - 16 NAX 474 OCS 2.4
V-5 13 - 16 NAX 475 OCS 2.1
V-6 14 - 16 NAX 476 OCS 1.2
V-7 13 - 17 NAX 477 OCS 2.4
V-8 13-16 NAX 478 OCS 1.9
V-9 14-17 NAX 479 OCS 1.4
V-10 13 - 16 NAX 480 OCS 1.5
V-ll 13-18 NAX 481 OCS 2.1
See Appendix Figure 2.1 for the verification areas.
*OCS = Opposed Crystal System
MM-JEK:03-08-93
MS-00698.VL WP51
REV032293
7
10 12 14
) i—i—i—r
16
i—r
18 20 22 24 26 28 30 32 34 36 38 40
i—i—i—i—i—i—i—i—i—i—i—i—i—i—r
FIRST SOUTH MEADOWLARK LANE
i—i—i—i—r 4
28
Y
•
SCALE IN FEET
20
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20 ..10
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J I I L J L
/// /// jjj-
15-16 :
i
V-4 V-8
13-16 13-16 :SVv.-V-.V.< 6 >:
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V-11
13-18
V-3 V-7
15-16 13-17 4-17
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6 Xv.v.v.v;
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V-5 V-9 V-1
14-17 13-16 13-16
40
THIS DRAWING,' PREPARED FOR THE DECONTAMINATION AND
DECOMMISSIONING PROGRAM, IS:FOR THE SOLE USE OF THE
U.S. DEPARTMENT OF ENERGY AND ITS CONTRACTORS. IT IS
NOT A LAND SURVEY PLAT. UTILITY LOCATION PLAT, OR OTHER
IMPROVEMENT SURVEY PLAT AND IS NOT TO BE RELIED UPON
FOR THE ESTABLISHMENT OF FENCE. BUILDING. OR OTHER
.FUTURE. IMPROVEMENT. LIMES.. .:
NORTH
J I I L I I I L J L
10 12 14 16 18 20 22 24 26 28
26
LEGEND
• ® •
....©....
12-15
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN juR/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION
24
22
12 AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
v-1
16-17
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
20
RADIOLOGie
"FIGURE 2:1
EXTERIOR EXTENT OF CONTAMINATION
18
16
RESIDENCE —NO. OF OCCUPANTS
NON-RESIDENCE —MAN-HRS. WK
INSTRUMENT NO. [SURVEYOR
SURVEY DATE
VERIFICATION
14
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE. COLORADO
rr 3-m PARCEL NO. A00200000280
FIRST SOUTH MEADOWLARK LN.
MONTICELLO, UTAH
12
DATE APPROVAL DOE
MS-00698-VL
3-RnnfiaR-vi SHT1 QF1
30 32 34 36 38 40
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS, INC.
GRAND JUNCTION OFFICE
P. 0. BOX 2567
GRAND JUNCTION. COLORADO 81502
JUN 2 ? 1993
Donald N. Leske
Grand Junction Office
U.S. Department of Energy
2597 B 3/4 Road
P.O. Box 2567
Grand Junction, CO 81502
Dear Mr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil, indoor radon daughter
concentration, and indoor gamma exposure rate at this property.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Gretchen A. Pierce
Pollutant Assessments Group
Location Number: MS00698
Location Address: A002OO0O028O
1st South Meadowlark Lane
Monticello. Utah 84535
Property Owner:

Attachments
HEALTH AND SAFETY RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
A00200000280,1ST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH (MS00698)
S.K. Mather
June 1993
Work performed by the
POLLUTANT ASSESSMENTS GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIHCATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from A00200000280, 1st South
Meadowlark Lane, Monticello, Utah (MS00698) 5
v
ACIOJOWIJEDGMEJNTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge G. A. Pierce for analysis of soil samples and M.K. Jensen and A.R.
Jones for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive matenal resulting from mill
operations. During 1992, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at
A00200000280, 1st South Meadowlark Lane, Monticello, Utah. The Pollutant
Assessments Group (PAG) of Oak Ridge National Laboratory was assigned the
responsibility of verifying the data supporting the adequacy of remedial action and
confirming the site's compliance with DOE guidelines. The PAG found that the
site successfully meets the DOE remedial action objectives. Procedures used by
the PAG are described in the Pollutant Assessments Group Procedures Manual
(ORNL, 1992).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT A0020000028a 1ST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH (MS00698)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War II. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Pollutant Assessments
Group of the Health and Safety Research Division at Oak Ridge National Laboratory under DOE
contract DE-AC05-84OR21400 with Martin Marietta Energy Systems, Inc.
2
During 1992, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a vacant lot located at A00200000280, 1st South Meadowlark Lane,
Monticello, Utah. The remedial action plan required excavation of all exterior contamina-
tion. When the excavation was completed, the property was resurveyed, including soil
sampling, to ensure the removal of all contamination, backfilled with uncontaminated
material, and restored to a condition comparable to that which existed prior to remedial
action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Pollutant Assessments Group (PAG) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the A00200000280,
1st South Meadowlark Lane site. This report describes the methods and results of that
verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 200 yd3 of mill
tailings 6 inches deep. During the actual removal process, a total of 200 yd3 of
contaminated earth and uranium mill tailings, 6 inches deep were removed from a 1004 m2
area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of gamma scans with a scintillometer, ground-level
and basement scans of the building and a surface scan of the exterior and soil sampling.
Samples representative of the bottom 15-cm (6-in.) soil layers of 11 excavated areas were
collected and blended to form representative composite soil samples for each verification
area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Exterior surface gamma measurements taken by Geotech from the excavated areas
prior to backfilling ranged from 13 to 18 /iR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. There were 11 excavated areas for this
property. Geotech's analysis of these samples showed ^Ra concentrations from 1.2 to 2,4
pCi/g in the composite samples. ORNL PAG obtained a percentage of these soil samples
and performed a confirmatory analysis, which showed ^Ra concentrations from 1.7 to 2.7
pCi/g. These values are below the DOE guideline value of 15 pCi/g for soil layers >15
cm below the surface (Table 1). Results of Geotech and ORNL soil sample analyses are
given in Table 2.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
One discrepancy was noted in that the DOE inclusion letter was not located in the folio.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to 222Rn Average annual radon proge- 0.03 WL
progeny ny concentration (including
background)
(DOE 1990)
5
Table 2. Results of ORNL analysis of Geotech soil samples
from A00200000280, 1st South Meadowlark Lane, Monticello Utah (MS00698)
^Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No.* (cm)
X4 NAX-474 15-30 1.9 2.4
X7 NAX-477 15-30 2.7 2.4
Xll NAX-481 15-30 1.7 2.1
" An X-type sample is a split of the sample taken by the remedial action contractor.
b Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
6
REFERENCES
Abramiuk I. N.et aL1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00698, Address: A00200000280, 1st South Meadowlark
Lane, Monticello, Utah 84535, Geotech, Grand Junction, Colorado, March 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1992. Pollutant Assessments Group Procedures Manual. ORNI/TM-
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
» 1
DOE ID NO.: MS— QA6W"V^-
Property Address: flr*,j So-utlx MeAg/ouoUrtC LiU,e_
Parcel »JO- ^OOZ000003ZO
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
Chem-Nuclear Geotech. Inc.
YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 ma.
In-situ [ ] Lab b^
Interior gamma is < 20 /jR/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21.
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Decontamination and
Decommissioning Program
(Rev. 03/02/87).
[X]* [ ] [ ]
[ )
( ]
[ 1
[ ] [ ]
t ) [X]
(Vacant Lot)
t ] [X]
(Vacant Lot)
1x3 [ J
U.S. Department
of Energy (DOE!
YES NO NOT TAKEN
tf) I 1 11
[£] [ ] [ ]
[ ) [ 3 Ifi
ii i ) iyj
[ ] ifi I )
I 1 I 1 Ixi 11 i 1 ff)
COMMENTS: *The excavations were backfilled with materials that were measured
at the source showing that the Ra-226 concentrations are in the ranoe of
normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background. al background.
93
ENT 11111111
SFCERTI FED
RECORDS MANAGE
SFMS-08699
DOE ID NO.: MS— O Q £ ^ ~ V-
CHEM-NUCLEAR GEOTECH, INC., RECOMMENDATION
Based on the Chem-Nuclear Geotech, Inc., evaluation, I recommend this property
for:
{XJ Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
arry ry
Decont at ion am
V/7/f]
and Decommissioning Program Manager
Chem-Nuclear Geotech, Inc.
Date
DOE EVALUATION
pQ) Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental standards
were applied per 40 CFR 192.21.
A Decontamination and Decoi
Certification Official
Department of Energy
issioning Program Date
RECORDS MANA
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00699-VL
ADDRESS: PARCEL NO. A00200000320, FIRST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH 84535
MARCH 1993
Prepared for
Decontamination and Decommissioning Program
Division of Facilities and Site Decommissioning
Department of Energy
by
Chem-Nuclear Geotech, Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
Har^iy A. Perry-
Program Director
Chem-Nuclear Geotech, Inc., has been granted authorization to conduct remedial
action under the Decontamination and Decommissioning Program. Remedial action
was done in accordance with the Environmental Protection Agency Standards for
Cleanup of Lands and Buildings Contaminated with Residual Radioactive Material
from Inactive Uranium Processing Sites, 40 CFR 192.12, 192.20-23.
llllllllll mining
SFOCPLRPTS SFMS-09043
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification . 5
4.0 APPENDIX 6
DOE ID NO.: MS-00699-VL
1.0 SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Decontamination and Decommissioning Program with the primary
objective of reducing the potential hazard to the public due to
long-term exposure to low-level radioactivity associated with the
offsite mill tailings derived from the former U.S. Atomic Energy
Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to
provide additional sources of vanadium needed during World War II.
Various government agencies operated the mill until 1947. The AEC
obtained the mill in 1948 and operated it through 1959 under cost-
type contracts to provide both uranium and vanadium. Mill
operations were terminated on January 1, 1960.
The mill processed approximately one million tons of ore during the
AEC operations. Throughout the operating period, mill tailings from
the Monticello millsite were removed from the site and used for
construction-related activities in the vicinity.
1.2 Criteria for Remedial Action
The Decontamination and Decommissioning Program adopted the
"Standards for Remedial Action at Inactive Uranium Processing Sites"
(40 CFR Part 192) for all cleanup activities under the MVP Project.
These standards were prepared by the U.S. Environmental Protection
Agency (EPA) to establish guidelines for the control of tailings
piles and the cleanup of buildings and open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the
EPA standards. The Remedial Action Contractor was notified of the
inclusion of this property into the Decontamination and
Decommissioning Program and was authorized by the DOE to conduct
remedial action as required to bring the property into conformance
with the EPA standards.
1
1.3 Suaaary of RMedial Action
DOG ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
DOE ID NO.: MS-00699-VL
MS-00699-VL
Lot 32, Meadowlark Acres Subdivision,
City of Monticello, County of San Juan,
State of Utah
Parcel No. A00200000320,
First South Meadowlark Lane
Monticello, Utah 84535

Vacant Lot (VL)
Not applicable; inclusion requested by
the Remedial Action Contractor
December 9, 1991
Chem-Nuclear Geotech, Inc.
April 3, 1992
DLB Unlimited, Inc.
P.O. Box 40513
Grand Junction, Colorado
August 31, 1992
October 28, 1992
Interior: 0 cubic yards
Exterior: 85 cubic yards
254 square meters (ra2)
March 1993
2
DOE ID NO.: MS-00699-VL
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual
radioactive material (Appendix Figure 2.1). Once excavation was
complete, the affected areas were resurveyed for possible remaining
residual radioactive material and, upon attaining satisfactory
results, were backfilled with uncontaminated material. The property
was restored to a condition comparable to that which existed prior to
remedial action activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified contamination, 6 inches deep,
within the property. The remedial action process included the removal
of approximately 85 cubic yards of residual radioactive material,
10 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Iteas During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00699-VL
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by Chem-Nuclear
Geotech, Inc., during May 1991, as described in the final REA
dated April 1992. Appendix Figure 2.1 shows the extent of
assessed contamination and identifies the areas recommended to
undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to
backfilling. Following the gamma scan, soil samples
representative of the 6-inch-thick soil layer at the bottom of
the excavation were collected. These samples were blended to
form composite samples representing the verification areas
(Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined
during the gamma scan, ranged from 13 microroentgens per
hour (uR/h) to 21 uR/h (Appendix Figure 2.1). The results of
analyses for radium-226 in five composite soil samples ranged
from 1.1 picocurie per gram (pCi/g) to 3.3 pCi/g (Appendix
Table 3.1). The composite samples representing Areas V-l and
V-5 included soil samples taken from the bottom of the
excavation at MS-00700-VL (Areas V-3 and V-4).
4
DOE ID NO.: MS-00699-VX
3.2 Race nidation for Certification
Residual radioactive materials have been removed from this property
to the extent required by the EPA standards (40 CFR 192.12,
192.20-23), as indicated in the Certification Data Summary below.
Therefore, the property located at Parcel No. A00200000320, First
South Meadowlark Lane, in Monticello, Utah, is recommended for
certification as required by the Decontamination and
Decommissioning Program guidelines, and the appropriate records
should be documented.
Certification Data Summary
Applicability Standards Survey Results
Habitable Structures
Exposure Rate: Shall not exceed 20 uR/h
above background.
Not applicable:
vacant lot.
Radon Decay-Product
Concentration:
Annual average shall not
exceed 0.02 HL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Not applicable:
vacant lot.
Land
Radium-226 Concentration
in Surface Soil:
Shall not exceed 5 pCi/g
above background* in the
15-cm surface layer,
averaged over 100 m2.
< 5 pCi/g above
background.
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below the
surface, averaged over
100 m2.
Soil sample results
ranged from 1.1 pCi/g
to 3.3 pCi/g.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00699-VL
4.0 APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00699-VL
Address: Parcel No. A00200000320, First South Meadowlark Lane, Monticello, Utah
Area
Exposure-Rate
Range (uR/h)
Soil Sample
Ticket No.
Meas.
Method*
Radium-226
(pCi/g)
V-l**
V-2
V-3
V-4
V-5**
13 - 21
15 - 18
13 - 17
14 - 18
16 - 18
NAV 727
NAV 728
NAV 729
NAV 730
NAV 731
OCS
OCS
OCS
OCS
OCS
1.3
2.8
1.7
1.1
3.3
See Appendix Figure 2.1 for the verification areas.
*OCS - Opposed Crystal System
**The composite samples included soil samples taken from MS-00700-VL.
MM-JEK:03-08-93
MS-00699.VL WP51
REV032293
7
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS, INC.
GRAND JUNCTION OFFICE
P. 0. BOX 2567
GRAND JUNCTION. COLORADO 81502
JUN 2 31993
Donald N. Leske
Grand Junction Office
U.S. Department of Energy
2597 B 3/4 Road
P.O. Box 2567
Grand Junction, CO 81502
Dear Hr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil, indoor radon daughter
concentration, and indoor gamma exposure rate at this property.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Gretchen A. Pierce
Pollutant Assessments Group
Location Number: MS00699
Location Address: A00200000320
1st South Meadowlark Lane
Monticello. Utah 84535
Property Owner:

Attachments
HEALTH AND SAFETY RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
A00200000320,1ST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH (MS00699)
S.K. Mather
June 1993
Work performed by the
POLLUTANT ASSESSMENTS GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from A00200000320, 1st South
Meadowlark Lane, Monticello, Utah (MS00699) 5
v
ACXNOWI^DGMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge G. A. Pierce for analysis of soil samples and M.K. Jensen and AR.
Jones for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1992, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at
A00200000320, 1st South Meadowlark Lane, Monticello, Utah. The Pollutant
Assessments Group (PAG) of Oak Ridge National Laboratory was assigned the
responsibility of verifying the data supporting the adequacy of remedial action and
confirming the site's compliance with DOE guidelines. The PAG found that the
site successfully meets the DOE remedial action objectives. Procedures used by
the PAG are described in the Pollutant Assessments Group Procedures Manual
(ORNL, 1992).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT A00200000320, 1ST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH (MS00699)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War II. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Pollutant Assessments
Group of the Health and Safety Research Division at Oak Ridge National Laboratory under DOE
contract DE-AC05-84OR21400 with Martin Marietta Energy Systems, Inc.
2
During 1992, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a vacant lot located at A00200000320, 1st South Meadowlark Lane,
Monticello, Utah. The remedial action plan required excavation of all exterior contamina-
tion. When the excavation was completed, the property was resurveyed, including soil
sampling, to ensure the removal of all contamination, backfilled with uncontaminated
material, and restored to a condition comparable to that which existed prior to remedial
action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Pollutant Assessments Group (PAG) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the A00200000320,
1st South Meadowlark Lane site. This report describes the methods and results of that
verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 51 yd3 of mill tailings
6 inches deep. However, during the actual removal process, a total of 85 yd3 of
contaminated earth and uranium mill tailings, 10 inches deep were removed from a 254 m2
area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of gamma scans with a scintillometer, ground-level
and basement scans of the building and a surface scan of the exterior and soil sampling.
Samples representative of the bottom 15-cm (6-in.) soil layers of 5 excavated areas were
collected and blended to form representative composite soil samples for each verification
area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Exterior surface gamma measurements taken by Geotech from the excavated areas
prior to backfilling ranged from 13 to 21 uR/h.
SoH Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. There were 5 excavated areas for this
property. Geotech's analysis of these samples showed ^Ra concentrations from 1.1 to 3.3
pCi/g in the composite samples. ORNL PAG obtained these soil samples and performed
a confirmatory analysis, which showed ^Ra concentrations from 1.4 to 3.3 pCi/g. These
values are below the DOE guideline value of 15 pCi/g for soil layers >15 cm below the
surface (Table 1). Results of Geotech and ORNL soil sample analyses are given in
Table 2.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
One discrepancy was noted in that the DOE inclusion letter was not located in the folio.
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to 222Rn
progeny
Average annual radon proge-
ny concentration (including
background)
0.03 WL
(DOE 1990)
5
Table 2. Results of ORNL analysis of Geotech soil samples
from A00200000320,1st South Meadowlark Lane, Monticello Utah (MS0Q699)
^Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No* (cm)
XI NAV-727 15-30 1.8 1.3
X2 NAV-728 15-30 3.2 2.8
X3 NAV-729 15-30 1.4 1.7
X4 NAV-730 15-30 2,1 1.1
X5 NAV-731 15-30 3.3 3.3
" An X-type sample is a split of the sample taken by the remedial action contractor.
* Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
6
REFERENCES
Abramiuk I. N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00699, Address: A00200000320, 1st South Meadowlark
Lane, Monticello, Utah 84535, Geotech, Grand Junction, Colorado, March 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1992. Pollutant Assessments Group Procedures Manual ORNL/TM-
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
14
jFIRST SOUTH MEADOWLARK LANE
• J LLL1
in
16-18
14-15
SCALE IN FEET i
LLL
V-1
13-21
:<1 V-2 10 10
14-18
16-18
14-15
.20 .. 10 0
RM00699V 03/09/93 TS29
20 40
NORTH
THIS DRAWING, PREPARED FOR THE DECONTAMINATION AND :
DECOMMISSIONING PROGRAM. IS FOR THE:SOLE USE OF THE
U.S. DEPARTMENT OF ENERGY AND ITS CONTRACTORS. IT IS:
NOT A LAND SU&VEY PLAT. UTILITY LOCATION PLAT; OR OTHER
IMPROVEMENT SURVEY PLAT AND:IS NOT TO BE RELIED UPON
FOR THE ESTABLISHMENT OF FENCE. BUILplNG. 0R: OTHER
FUTURE IMPROVEMENT LINES.
_L
14 18 24
J L
®
12-15
12
36 38 40
LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN u.R/h
ASSESSED AREA IDENTIFIER!
' AVE RAGE. DEPTH 0 F ASSESS ED CONTAMINATION
AREA OF.ASSESSED.CONTAMINATION
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION '
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER !
AND EXCAVATION EXPOSURE-RATE RANGE I
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL. ACTION.;.
— 26
24
22
20
18
RADIOLOGICAL
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
16
RESIDENCE —NO. OF OCCUPANTS
NON-RESIDENCE —MAN-HRS. WK
INSTRUMENT NO SURVEYOR
SURVEY DATE
VERIFICATION
CK A E APP. NO 1 DATE • V CK A.E. APP.
14
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE. COLORADO
J ETC
SUBMITTED
!?|| PARCEL NO. A00200000320
is
12
FIRST SOUTH MEADOWLARK
MONTICELLO, UTAH
LN.
£ Geotech, Inc.
OATE APPROVAL OOE
MS-00699-VL
30 32
1W° NCS-B00699-V1 SHT1 OFI
36 38 40
DOE ID NO.: MS - 00700L-
Property Address: 'fW'bt SoutV. M^QgjptjUr< L<Wtfi
ftrcsi uo.; AoozoooooSSO
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
Chem-Nuclear Geotech. Inc.
YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 ma. [X]* [ ] [ ]
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m». M [ J t ]
In-situ [ ] Lab &<-]
Interior gamma is < 20 ^R/h
above background in any
occupied or habitable
structure. [ ]
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level. [ J
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21. [ ]
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Decontamination and
Decommissioning Program
(Rev. 03/02/87). [ ] [ ] M
I 1 [X]
(Vacant Lot)
[ ] [X]
(Vacant Lot)
U.S. Department
of Enerov (DOE!
YES NO NOT TAKEN
[)Q [ 3 t 3
I ]
[ }
[ ]
[ 1
[ ]
[ ]
[ J [ ]
[ ]
[ i
COMMENTS: *The excavations were backfilled with materials that were measured
at the source showino that the Ra-226 concentrations are in the ranoe of
normal background. Other surface areas were verified on 1
exposure rates that do not exceed 30 percent above norma]?
Illlllll
U£93
^ECC^OS MANAGEMtN
SFCERTI FED
Illlllll
SFMS-00700
DOE ID NO.: MS— QOl OO ~ V L.
CHEM-NUCLEAR GEOTECH, INC., RECOMMENDATION
Based on the Chem-Nuclear Geotech, Inc., evaluation, I recommend this property
for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
/Harry A. PerryDate
Decontamination and Decommissioning Program Manager
Chem-Nuclear Geotech, Inc.
DOE EVALUATION
1^} Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental standards
were applied per 40 CFR 192.21.
Decontamination and Decoi
Certification Official
Department of Energy
ffsT ninq Program Date
PROPERTY COMPLETION REPORT
FOR
1/iAR 19 1993
RECORDS MANAGE&EOT
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00700-VL
ADDRESS: PARCEL NO. A00200000330, FIRST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH 84535
MARCH 1993
Prepared for
Decontamination and Decommissioning Program
Division of Facilities and Site Decommissioning
Department of Energy
by
Chem-Nuclear Geotech, Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
Harry A. Perry
Program Director
Chem-Nuclear Geotech, Inc., has been granted authorization to conduct remedial
action under the Decontamination and Decommissioning Program. Remedial action
was done in accordance with the Environmental Protection Agency Standards for
Cleanup of Lands and Buildings Contaminated with Residual Radioactive Material
from Inactive Uranium Processing Sites, 40 CFR 192.12, 192.20-23.
•Illlllll
SFOCPLRPTS
SFMS-09043
TABUS OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
i
DOE ID NO.: MS-00700-VL
1.0 SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Decontamination and Decommissioning Program with the primary
objective of reducing the potential hazard to the public due to
long-term exposure to low-level radioactivity associated with the
offsite mill tailings derived from the former U.S. Atomic Energy
Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to
provide additional sources of vanadium needed during World War II.
Various government agencies operated the mill until 1947. The AEC
obtained the mill in 1948 and operated it through 1959 under cost-
type contracts to provide both uranium and vanadium. Mill
operations were terminated on January 1, 1960.
The mill processed approximately one million tons of ore during the
AEC operations. Throughout the operating period, mill tailings from
the Monticello millsite were removed from the site and used for
construction-related activities in the vicinity.
1.2 Criteria for Remedial Action
The Decontamination and Decommissioning Program adopted the
"Standards for Remedial Action at Inactive Uranium Processing Sites"
(40 CFR Part 192) for all cleanup activities under the MVP Project.
These standards were prepared by the U.S. Environmental Protection
Agency (EPA) to establish guidelines for the control of tailings
piles and the cleanup of buildings and open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the
EPA standards. The Remedial Action Contractor was notified of the
inclusion of this property into the Decontamination and
Decommissioning Program and was authorized by the DOE to conduct
remedial action as required to bring the property into conformance
with the EPA standards.
1
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
DOE ID NO.: MS-00700-VL
MS-00700-VL
Lot 33, Meadowlark Acres Subdivision,
City of Monticello, County of San Juan,
State of Utah
Parcel No. A00200000330,
First South Meadowlark Lane
Monticello, Utah 84535

Vacant Lot (VL)
Not applicable; inclusion requested by
the Remedial Action Contractor
December 9, 1991
Chem-Nuclear Geotech, Inc.
April 3, 1992
DLB Unlimited, Inc.
P.O. Box 40513
Grand Junction, Colorado
August 31, 1992
October 28, 1992
Interior: 0 cubic yards
Exterior: 92 cubic yards
276 square meters (m2)
March 1993
2
DOE ID NO.: MS-00700-VL
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual
radioactive material (Appendix Figure 2.1). Once excavation was
complete, the affected areas were resurveyed for possible remaining
residual radioactive material and, upon attaining satisfactory
results, were backfilled with uncontaminated material. The property
was restored to a condition comparable to that which existed prior to
remedial action activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified contamination, 6 inches deep,
within the property. The remedial action process included the removal
of approximately 92 cubic yards of residual radioactive material,
10 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00700-VL
3.0 VERIFICATION SUNMART
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Surrey
A radiological survey was conducted by Chem-Nuclear
Geotech, Inc., during May 1991, as described in the final REA
dated April 1992. Appendix Figure 2.1 shows the extent of
assessed contamination and identifies the areas recommended to
undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to
backfilling. Following the gamma scan, soil samples
representative of the 6-inch-thick soil layer at the bottom of
the excavation were collected. These samples were blended to
form composite samples representing the verification areas
(Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined
during the gamma scan, ranged from 13 microroentgens per
hour (uR/h) to 21 uR/h (Appendix Figure 2.1). The results of
analyses for radium-226 in four composite soil samples ranged
from 1.2 picocuries per gram (pCi/g) to 3.3 pCi/g (Appendix
Table 3.1). The composite samples representing Areas V-3 and
V-4 included soil samples taken from the bottom of the
excavation at MS-00699-VL (Areas V-l and V-5).
4
DOB ID NO.: MS-00700-VL
3.2 Recc nidation for Certification
Residual radioactive materials have been removed from this property
to the extent required by the EPA standards (40 CFR 192.12,
192.20-23), as indicated in the Certification Data Summary below.
Therefore, the property located at Parcel No. A00200000330, First
South Meadowlark Lane, in Monticello, Utah, is recommended for
certification as required by the Decontamination and
Decommissioning Program guidelines, and the appropriate records
should be documented.
Certification Data Summary
Applicability Standards Survey Results
Habitable Structures
Exposure Rate: Shall not exceed 20 uR/h
above background.
Not applicable:
vacant lot.
Radon Decay-Product
Concentrat ion:
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Not applicable:
vacant lot.
Land
Radium-226 Concentration
in Surface Soil:
Shall not exceed 5 pCi/g
above background* in the
15-cm surface layer,
averaged over 100 m2.
< 5 pCi/g above
background.
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below the
surface, averaged over
100 m*.
Soil sample results
ranged from 1.2 pCi/g
to 3.3 pCi/g.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00700-VL
4.0 APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BOILT
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00700-VL
Address: Parcel No. A00200000330, First South Meadowlark Lane, Monticello, Utah
Area
Exposure-Rate
Range (uR/h)
Soil Sample
Ticket No.
Meas.
Method*
Radium-226
(pCi/g)
V-l
V-2
V-3**
V-4**
15
15
13
16
19
18
21
18
NAV 725
NAV 726
NAV 727
NAV 731
OCS
OCS
OCS
OCS
1.2
1.3
1.3
3.3
See Appendix Figure 2.1 for the verification areas.
*OCS = Opposed Crystal System
**The composite samples included soil samples taken from MS-00699-VL.
MM-JEK:03-08-93
MS-00700.VL WP51
REV032293
7
SCALE IN FEET
X
20....:10 ; 0
RMOt)700V 03/0»/»3 Tj529
.20
I
12
22 24
i FIRST SOUTH MEADOWLARK LANE
r?^p.nTYii^rrTy.Tir^n?»i
10 V-1 10
V-2 15-1 10
15-18
15-18 15-18
15-18
15-18
10
10
40 NORTH
18
THIS DRAWING. PREPARED FOR THE DECONTAMINATION AND:
DECOMMISSIONING PROGRAM. IS FOR THE:SOLE USE OF THE
U.S. DEPARTMENT OF ENERGY AND ITS CONTRACTORS. IT IS: .
NOT A LAND SURVEY PLAT. UTILITY LOCATION PLAT; OR OTHER
IMPROVEMENT SURVEY PLAT AND:IS NOT TO BE RELIED UPON
FOR THE ESTABLISHMENT OF FENCE. BUILDING. OR OTHER
. FUTURE .IMPROVEMENT. LiNES.....!
28
©
®
12-15
12
40
jLEQENP
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN fiR/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATiON ';
AVERAGE1 EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE •••
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL..ACTION.-...
RAdlO^
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
NO DATE
RESIDENCE —NO. OF OCCUPANTS
NON-RESIDENCE —MAN-HRS WK.
INSTRUMENT NO SURVEYOR
SURVEY DATE
VERIFICATION
30
CK A E APP NO OATE SY CK. A.E APP.
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE. COLORADO
,..*,! PARCEL NO. A00200000330
FIRST SOUTH MEADOWLARK LN
MONTICELLO. UTAH
Geotech, Inc.
DATE APPROVAL DOE
MS-00700-VL
26
24
22
20
18
16
12
32
DWG NCS-B00700-V1 SHTI QF1
36 38 40
GRAND JUNCTION OFFICE
P. 0. BOX 2567
GRAND JUNCTION, COLORADO 81502
JUN 2 21993
Donald N. Leske
Grand Junction Office
U.S. Department of Energy
2597 B 3/4 Road
P.O. Box 2567
Grand Junction, CO 81502
Dear Hr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the ^Ra concentration in the soil, indoor radon daughter
concentration, and indoor gamma exposure rate at this property.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Gretchen A. Pierce
Pollutant Assessments Group
Location Number: MS00700
Location Address: A002000Q0330
First South Meadowlark Lane
Monticello. Utah 84535

OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS. INC.
Property Owner:
Owner Address:
Attachments
HEALTH AND SAFETY RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
A00200000330, 1ST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH (MS00700)
S.K. Mather
June 1993
Work performed by the
POLLUTANT ASSESSMENTS GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
(X)NTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIHCATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from A00200000330, 1st South
Meadowlark Lane, Monticello, Utah (MS00700) 5
v
ACKNOWLELXJMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge G.A Pierce for analysis of soil samples and M. K. Jensen and A.R.
Jones for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1992 RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at
A00200000330, 1st South Meadowlark Lane, Monticello, Utah. The Pollutant
Assessments Group (PAG) of Oak Ridge National Laboratory was assigned the
responsibility of verifying the data supporting the adequacy of remedial action and
confirming the site's compliance with DOE guidelines. The PAG found that the
site successfully meets the DOE remedial action objectives. Procedures used by
the PAG are described in the Pollutant Assessments Group Procedures Manual
(ORNL, 1992).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT A00200000330, 1ST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH (MS00700)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War II. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Pollutant Assessments
Group of the Health and Safety Research Division at Oak Ridge National Laboratory under DOE
contract DE-AC05-84OR21400 with Martin Marietta Energy Systems, Inc
2
During 1992, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a vacant lot located at A00200000330, 1st South Meadowlark Lane,
Monticello, Utah. The remedial action plan required excavation of all exterior contamina-
tion. When the excavation was completed, the property was resurveyed, including soil
sampling, to ensure the removal of all contamination, backfilled with uncontaminated
material, and restored to a condition comparable to that which existed prior to remedial
action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Pollutant Assessments Group (PAG) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the A00200000330,
1st South Meadowlark Lane site. This report describes the methods and results of that
verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 55 yd3 of mill tailings
6 inches deep. However, during the actual removal process, a total of 92 yd3 of
contaminated earth and uranium mill tailings, 10 inches deep were removed from a 276 m2
area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of gamma scans with a scintillometer, ground-level
and basement scans of the building and a surface scan of the exterior and soil sampling.
Samples representative of the bottom 15-cm (6-in.) soil layers of 4 excavated areas were
collected and blended to form representative composite soil samples for each verification
area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Exterior surface gamma measurements taken by Geotech from the excavated areas
prior to backfilling ranged from 13 to 21 uR/h.
SoH Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. There were 4 excavated areas for this
property. Geotech's analysis of these samples showed ^Ra concentrations from 1.2 to 3.3
pCi/g in the composite samples. ORNL PAG obtained these soil samples and performed
a confirmatory analysis, which showed ^Ra concentrations from 1.2 to 3.3 pCi/g. These
values are below the DOE guideline value of 15 pCi/g for soil layers >15 cm below the
surface (Table 1). Results of Geotech and ORNL soil sample analyses are given in
Table 2.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
One discrepancy was noted in that the DOE inclusion letter was not located in the
folio.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to 222Rn
progeny
Average annual radon proge-
ny concentration (including
background)
0.03 WL
(DOE 1990)
5
Table 2. Results of ORNL analysis of Geotech soil samples
from A00200000330,1st South Meadowlark Lane, Monticello Utah (MS00700)
226Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No* (cm)
XI NAV-725 15-30 1.2 1.2
X2 NAV-726 15-30 1.2 1.3
X3 NAV-727 15-30 1.8 1.3
X4 NAV-731 15-30 3.3 3.3
An X-type sample is a split of the sample taken by the remedial action contractor.
Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
6
REFERENCES
Abramiuk I. N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00700, Address: A00200000330, 1st South Meadowlark
Lane, Monticello, Utah 84535, Geotech, Grand Junction, Colorado, March 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1992. Pollutant Assessments Group Procedures Manual. ORNL/TM-
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
DOE ID NO.: MS^.
Property Address: F»*vfrt Soo^TU AlgQdoi^lttTk* LAM
fftrcel Wo. i .A0O20OO0O34O
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
Chem-Nuclear Geotech. Inc.
YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 ma. [X]* [ ] [ ]
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 ma. K4 [ ] [ ]
In-situ [ ] Lab p*g
Interior gamma is < 20 uR/h
above background in any
occupied or habitable
structure. [ ]
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level. [ ]
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21. [ ]
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Decontamination and
Decommissioning Program
(Rev. 03/02/87). [ ] [ ]
[ ] [X]
(Vacant Lot)
[ ] [X]
(Vacant Lot)
M t J
U.S. Department
of Energy (DOB1
YES NO NOT TAKEN
If
[ i
t }
[ i
( ]
[ ]
[ ]
[ i
[ i
[ i
[ i
1 )
tf6
COMMENTS: *The excavations were backfilled with materials that were measured
at the source showing that the Ra-226 concentrations are in the ranoe of
normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
SFCERTIFED SFMS-99843 .0
DOE ID NO.: MS- 0070/ ~ VI-
CHEM-NTJCLEAR GEOTECH, INC., RECOMMENDATION
Based on the Chem-Nuclear Geotech, Inc., evaluation, I recommend this property
for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
Decontamination and Decommissioning Program Manager
Chem-Nuclear Geotech, Inc.
DOE EVALUATION
Should be certified by the Department of Energy.
( ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental standards
were applied per 40 CFR 192.21.
Decontamination dnd-'Decommissioning Program Date
Certification Official
Department of Energy
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00701-VL
ADDRESS: PARCEL NO. A00200000340,
FIRST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH 84535
APRIL 1993
Prepared for
Decontamination and Decommissioning Program
Division of Facilities and Site Decommissioning
Department of Energy
by
Chem-Nuclear Geotech, Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
Harrv^A. Perry
Program Director
Chem-Nuclear Geotech, Inc., has been granted authorization to conduct remedial
action under the Decontamination and Decommissioning Program. Remedial action
was done in accordance with the Environmental Protection Agency Standards for
Cleanup of Lands and Buildings Contaminated with Residual Radioactive Material
from Inactive Uranium Processing Sites, 40 CFR 192.12, 192.20-23.
TABLE OP CONTENTS
Section £age
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action .... 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
i
DOE ID NO.: MS-00701-VL
1.0 SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Decontamination and Decommissioning Program with the primary
objective of reducing the potential hazard to the public due to
long-term exposure to low-level radioactivity associated with the
offsite mill tailings derived from the former U.S. Atomic Energy
Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to
provide additional sources of vanadium needed during World War II.
Various government agencies operated the mill until 1947. The AEC
obtained the mill in 1948 and operated it through 1959 under cost-
type contracts to provide both uranium and vanadium. Mill
operations were terminated on January 1, 1960.
The mill processed approximately one million tons of ore during the
AEC operations. Throughout the operating period, mill tailings from
the Monticello millsite were removed from the site and used for
construction-related activities in the vicinity.
1.2 Criteria for Remedial Action
The Decontamination and Decommissioning Program adopted the
"Standards for Remedial Action at Inactive Uranium Processing Sites"
(40 CFR Part 192) for all cleanup activities under the MVP Project.
These standards were prepared by the Environmental Protection
Agency (EPA) to establish guidelines for the control of tailings
piles and the cleanup of buildings and open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the
EPA standards. The Remedial Action Contractor was notified of the
inclusion of this property into the Decontamination and
Decommissioning Program and was authorized by the DOE to conduct
remedial action as required to bring the property into conformance
with the EPA standards.
1
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
DOE ID NO.: MS-00701-VL
MS-00701-VL
Lot 34, Meadowlark Acres Subdivision,
City of Monticello, County of San Juan,
State of Utah
Parcel No. A00200000340,
First South Meadowlark Lane
Monticello, Utah 84535

Vacant Lot (VL)
Not applicable; inclusion requested by
the Remedial Action Contractor
December 9, 1991
Chem-Nuclear Geotech, Inc.
April 3, 1992
DLB Unlimited, Inc.
P.O. Box 40513
Grand Junction, Colorado
August 31, 1992
October 28, 1992
Interior: 0 cubic yards
Exterior: 43 cubic yards
131 square meters (m>)
April 1993
2
DOE ID NO.: MS-00701-VL
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual
radioactive material (Appendix Figure 2.1). Once excavation was
complete, the affected area was resurveyed for possible remaining
residual radioactive material and, upon attaining satisfactory
results, was backfilled with uncontaminated material. The property
was restored to a physical condition comparable to that which existed
prior to remedial action activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified contamination, 6 inches deep,
within the property. The remedial action process included the removal
of approximately 43 cubic yards of residual radioactive material,
10 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00701-VL
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by Chem-Nuclear
Geotech, Inc., during May 1991, as described in the final REA
dated April 1992. Appendix Figure 2.1 shows the extent of
assessed contamination and identifies the area recommended to
undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to
backfilling. Following the gamma scan, soil samples
representative of the 6-inch-thick soil layer at the bottom of
the excavation were collected. These samples were blended to
form composite samples representing the verification areas
(Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined
during the gamma scan, ranged from 13 microroentgens per
hour (uR/h) to 19 uR/h (Appendix Figure 2.1). The results of
analyses for radium-226 in three composite soil samples ranged
from 1.6 picocuries per gram (pCi/g) to 2.3 pCi/g (Appendix
Table 3.1). The composite sample representing Area V-3
included soil samples taken from the bottom of the excavation
at MS-00702-VL (Area V-l).
4
DOE ID NO.: MS-00701-VL
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property
to the extent required by the EPA standards (40 CFR 192.12,
192.20-23), as indicated in the Certification Data Summary below.
Therefore, the property located at Parcel No. A00200000340, First
South Meadowlark Lane, in Monticello, Utah, is recommended for
certification as required by the Decontamination and
Decommissioning Program guidelines, and the appropriate records
should be documented.
Certification Data Summary
Applicability Standards Survey Results
Habitable Structures
Exposure Rate: Shall not exceed 20 uR/h
above background.
Not applicable:
vacant lot.
Radon Decay-Product
Concentrat ion:
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Not applicable:
vacant lot.
Lqnd
Radium-226 Concentration
in Surface Soil:
Shall not exceed 5 pCi/g
above background* in the
15-cm surface layer,
averaged over 100 m2.
< 5 pCi/g above
background.
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below the
surface, averaged over
100 m*.
Soil sample results
ranged from 1.6 pCi/g
to 2.3 pCi/g.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00701-VL
4.0 APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00701-VL
Address: Parcel No. A00200000340, First South Meadowlark Lane, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range (uR/h) Ticket No. Method* (pCi/g)
V-l 14 - 19 NAX 830 OCS 1.6
V-2 14 - 18 NAX 829 OCS 2.3
V-3** 15 - 18 NAX 828 OCS 1.9
See Appendix Figure 2.1 for the verification areas.
*OCS = Opposed Crystal System
**The composite sample included soil samples taken from MS-00702-VL.
MM-JEK:04-02-93
MS-00701.VL WP51
REV032293
7
10
l—r
FIRST SOUTH MEADOWLARK LANE
16-19
i ! M !
•yi t »N'yi ^^^^^n^iSSS S^^^^^" 1**1* T'
>/.\v.\v.V/.v.v.\V.v.v. -.V.V.-.V TT
V-3
15-18
10
12
LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN fiR/h
ASSESSED AREA IDENTIFIER!
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION j j
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION :j!
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION : : :
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE -
ASSESSED CONTAMINATION NOT FOUND AT TIME
.OF REMEDIAL ACTION
- 26
-24
SCALE IN FEET:
x:
20! 10 : 0.:
RM00701V 04/14/93 TMT/529
20
J L
12 16
16-19
13-15
13-15
13-15
40
NORTH
THIS d.RAWING, ;PREPAR£0 FOR THE DECONTAMINAtlON AND:
DECOMMISSIONING PROGRAM. IS FOR THE: SOLE USE OF THE
-U.S. DEPARTMENT OF ENERGY AND ITS CONTRACTORS. IT IS:• • •
NOT A:LAND SURVEY PLAT. imUlY LOCATION PLAT; OR OTHER
IMPROVEMENT SURVEY PLAT AND: IS NOT TO BE RELIED UPON
FOR THE ESTABLISHMENT OF FENCE. BUILDING. OR OTHER
. FUTURE IMPROVEMENT LINES....:
J L
18 24
J L
26 28
18
r"""lFIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
16
RESIDENCE—NO. OF OCCUPANT!
HOM-RESIOENCE-MAN-HRS./WK.
INSTRUMENT HO. SURVEYOR
SURVEY DATE
VERIFICATION
•Y CK. A.E. APP. NO. DATE BY CK. A.E. APP.
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE. COLORAOO
rr
SUBMITTED:
*1 4^3
PARCEL NO. A00200000340
FIRST SOUTH MEADOWLARK LN.
MONTICELLO, UTAH
12
32
Geotech, Inc.
~34
APPROVAL DOE
MS-00701-VL
36 38
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS, INC.
GRAND JUNCTION OFFICE
P. 0. BOX 2567
GRAND JUNCTION. COLORADO 81502
JUL 2 91993
Donald N. Leske
Project Manager, Monticello Projects
U.S. Department of Energy
P. 0. Box 2567
Grand Junction, 81502
Dear Mr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil, indoor radon daughter
concentration, and indoor gamma exposure rate at this property.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Gretchen A. Pierce
Pollutant Assessments Group
MS00701
A00200000340
1st South Meadowlark Lane
Monticello. Utah 84535

Location Number:
Location Address:
Property Owner:
Owner Address:
Attachments
HEALTH AND SAFETY RESEARCH DIVISION,
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
A00200000340,1ST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH (MS00701)
S.K. Mather
July 1993
Work performed by the
POLLUTANT ASSESSMENTS GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
UST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from A00200000340,1st South
Meadowlark Lane, Monticello, Utah (MS00701) 5
v
ACKNOWIJEIXJMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge G. A. Pierce for analysis of soil samples and M. K. Jensen and A. R.
Jones for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1992, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at
A00200000340, 1st South Meadowlark Lane, Monticello, Utah. The Pollutant
Assessments Group (PAG) of Oak Ridge National Laboratory was assigned the
responsibility of verifying the data supporting the adequacy of remedial action and
confirming the site's compliance with DOE guidelines. The PAG found that the
site successfully meets the DOE remedial action objectives. Procedures used by
the PAG are described in the Pollutant Assessments Group Procedures Manual
(ORNL, 1992).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT A00200000340, 1ST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH (MS00701)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War II. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1,1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
""The verification of remedial action was performed by members of the Pollutant Assessments
Group of the Health and Safety Research Division at Oak Ridge National Laboratory under DOE
contract DE-AC05-84OR21400 with Martin Marietta Energy Systems, Inc.
2
During 1992, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a vacant lot located at A00200000340,1st South Meadowlark Lane,
Monticello, Utah. The remedial action plan required excavation of all exterior contamina-
tion. When the excavation was completed, the property was resurveyed, including soil
sampling, to ensure the removal of all contamination, backfilled with uncontaminated
material, and restored to a condition comparable to that which existed prior to remedial
action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Pollutant Assessments Group (PAG) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the A00200000340,
1st South Meadowlark Lane site. This report describes the methods and results of that
verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 26 yd3 of mill tailings
6 inches deep. However, during the actual removal process, a total of 43 yd3 of
contaminated earth and uranium mill tailings, 10 inches deep were removed from a 131 m2
area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of gamma scans with a scintillometer, ground-level
and basement scans of the building and a surface scan of the exterior and soil sampling.
Samples representative of the bottom 15-cm (6-in.) soil layers of 3 excavated areas were
collected and blended to form representative composite soil samples for each verification
area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable.DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Exterior surface gamma measurements taken by Geotech from the excavated areas
prior to backfilling ranged from 13 to 19 uR/h.
SoH Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. There were 3 excavated areas for this
property. Geotech's analysis of these samples showed ^Ra concentrations from 1.6 to 2.3
pCi/g in the composite sample. ORNL PAG obtained two of these soil samples and
performed a confirmatory analysis, which showed ^Ra concentrations from 1.9 to 3.0
pCi/g. These values are below the DOE guideline value of 15 pCi/g for soil layers >15
cm below the surface (Table 1). Results of Geotech and ORNL soil sample analyses are
given in Tabic 2.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
One discrepancy was noted in that the DOE inclusion letter was not located in the folio.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to 222Rn Average annual radon proge- 0.03 WL
progeny ny concentration (including
background)
(DOE 1990)
5
Table 2. Results of ORNL analysis of Geotech sofl samples
from A00200000340, 1st South Meadowlark Lane, Monticello Utah (MS00701)
^Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No* (cm)
XI NAX-830 15-30 1.9 1.6
X2 NAX-829 15-30 * 2.3
X3** NAX-828 15-30 3.0 1.9
" An X-type sample is a split of the sample taken by the remedial action contractor.
b Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
Requested split sample not obtained from the remedial action contractor.
The composite sample included soil samples taken from MS00702.
6
REFERENCES
Abramiuk I. Net al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00701, Address: A00200000340,1st South Meadowlark
Lane, Monticello, Utah 84535, Geotech, Grand Junction, Colorado, April 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1992. Pollutant Assessments Group Procedures Manual ORNL/TM-
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
DOE ID NO.: MS- 0 O 2- ~ V U
Property Address: F»Vst Spi/flx MtadoidkrK LOHUL.
Parcel No,: AODZ000003SO
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
Chem-Nuclear Geotech. Inc.
YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2. [X]* [ ] [ ]
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 ma. MMM
In-situ [ ] Lab ><g
Interior gamma is < 20 uR/h
above background in any
occupied or habitable
structure. [ ]
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level. [ ]
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21. [ ]
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Decontamination and
Decommissioning Program
(Rev. 03/02/87). [ ] [ ] ><
t 3 [XJ
(Vacant Lot)
t 1 [X]
(Vacant Lot)
U.S. Department
of Energy (DOE!
YES NO NOT TAKEN
[ ]
[ ]
[ ]
[ )
t ]
t ]
t i
[ i [ ]
COMMENTS: *The excavations were backfilled with materials that were measured
at the source showing that the Ra-226 concentrations are in the ranoe of
normal background. Other surface areas were verified on the basis of oamma
exposure rates that do not exceed 30 percent above normal background.
illllllllll Illlllll
SFCERTI FED SFMS-09043 ,0.
DOE ID NO.: MS- QOIOZ - V >-
CHEM-NUCLEAR GEOTECH, INC., RECOMMENDATION
Based on the Chem-Nuclear Geotech, Inc., evaluation, I recommend this property
for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
7 Date Irry A7 Perry " ~~ Date
Decontamination and Decommissioning Program Manager
Chem-Nuclear Geotech, Inc.
DOE EVALUATION
ty£) Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental standards
were applied per 40 CFR 192.21.
Decontamination anchDecommissioning Program Date
Certification Official
Department of Energy
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00702-VL
ADDRESS: PARCEL NO. A00200000350,
FIRST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH 84535
APRIL 1993
Prepared for
Decontamination and Decommissioning Program
Division of Facilities and Site Decommissioning
Department of Energy
by
Chem-Nuclear Geotech, Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
Harr
Prog
'A. Perry
fam Director
Chem-Nuclear Geotech, Inc., has been granted authorization to conduct remedial
action under the Decontamination and Decommissioning Program. Remedial action
was done in accordance with the Environmental Protection Agency Standards for
Cleanup of Lands and Buildings Contaminated with Residual Radioactive Material
from Inactive Uranium Processing Sites, 40 CFR 192.12, 192.20-23.
TABLE OF CONTENTS
SgctJ-on £aSL£
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
DOE ID NO.: MS-00702-VL
1.0 SUMMARY
1.1 Basic for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Decontamination and Decommissioning Program with the primary
objective of reducing the potential hazard to the public due to
long-term exposure to low-level radioactivity associated with the
offsite mill tailings derived from the former U.S. Atomic Energy
Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to
provide additional sources of vanadium needed during World War II.
Various government agencies operated the mill until 1947. The AEC
obtained the mill in 1948 and operated it through 1959 under cost-
type contracts to provide both uranium and vanadium. Mill
operations were terminated on January 1, 1960.
The mill processed approximately one million tons of ore during the
AEC operations. Throughout the operating period, mill tailings from
the Monticello millsite were removed from the site and used for
construction-related activities in the vicinity.
1.2 Criteria for Remedial Action
The Decontamination and Decommissioning Program adopted the
"Standards for Remedial Action at Inactive Uranium Processing Sites"
(40 CFR Part 192) for all cleanup activities under the MVP Project.
These standards were prepared by the Environmental Protection
Agency (EPA) to establish guidelines for the control of tailings
piles and the cleanup of buildings and open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the
EPA standards. The Remedial Action Contractor was notified of the
inclusion of this property into the Decontamination and
Decommissioning Program and was authorized by the DOE to conduct
remedial action as required to bring the property into conformance
with the EPA standards.
1
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
DOE ID NO.: MS-00702-VL
MS-00702-VL
Lot 35, Meadowlark Acres Subdivision,
City of Monticello, County of San Juan,
State of Utah
Parcel No. A00200000350,
First South Meadowlark Lane
Monticello, Utah 84535

Vacant Lot (VL)
Not applicable; inclusion requested by
the Remedial Action Contractor
December 9, 1991
Chem-Nuclear Geotech, Inc.
April 3, 1992
DLB Unlimited, Inc.
P.O. Box 40513
Grand Junction, Colorado
August 31, 1992
October 28, 1992
Interior: 0 cubic yards
Exterior: 121 cubic yards
364 square meters (ma)
April 1993
2
DOE ID NO.: MS-00702-VL
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual
radioactive material (Appendix Figure 2.1). Once excavation was
complete, the affected area was resurveyed for possible remaining
residual radioactive material and, upon attaining satisfactory
results, was backfilled with uncontaminated material. The property
was restored to a physical condition comparable to that which existed
prior to remedial action activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified contamination, 6 inches deep,
within the property. The remedial action process included the removal
of approximately 121 cubic yards of residual radioactive material,
10 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.t MS-00702-VL
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by Chem-Nuclear
Geotech, Inc., during May 1991, as described in the final REA
dated April 1992. Appendix Figure 2.1 shows the extent of
assessed contamination and identifies the areas recommended to
undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to
backfilling. Following the gamma scan, soil samples
representative of the 6-inch-thick soil layer at the bottom of
the excavation were collected. These samples were blended to
form composite samples representing the verification areas
(Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined
during the gamma scan, ranged from 13 microroentgens per
hour (uR/h) to 19 uR/h (Appendix Figure 2.1). The results of
analyses for radium-226 in seven composite soil samples ranged
from 1.2 picocuries per gram (pCi/g) to 2.4 pCi/g (Appendix
Table 3.1). The composite sample representing Area V-l
included soil samples taken from the bottom of the excavation
at MS-00701-VL (Area V-3). The composite samples representing
Areas V-5, V-6, and V-7 included soil samples taken from the
bottom of the excavation at MS-00703-VL (Areas V-l, V-2,
and V-3).
4
DOE ID NO.: MS-00702-VL
3.2 Race •ndation for Certification
Residual radioactive materials have been removed from this property
to the extent required by the EPA standards (40 CFR 192.12,
192.20-23), as indicated in the Certification Data Summary below.
Therefore, the property located at Parcel No. A00200000350, First
South Meadowlark Lane, in Monticello, Utah, is recommended for
certification as required by the Decontamination and
Decommissioning Program guidelines, and the appropriate records
should be documented.
Certification Data Summary
Applicability Standards Survey Results
Habitable Structures
Exposure Rate: Shall not exceed 20 /iR/h
above background.
Not applicable:
vacant lot.
Radon Decay-Product
Concentrat ion:
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Not applicable:
vacant lot.
Land
Radium-226 Concentration
in Surface Soil:
Shall not exceed 5 pCi/g
above background* in the
15-cm surface layer,
averaged over 100 m2.
< 5 pCi/g above
background.
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below the
surface, averaged over
100 m2.
Soil sample results
ranged from 1.2 pCi/g
to 2.4 pCi/g.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOB ZD NO.: MS-00702-VL
4.0 APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00702-VL
Address: Parcel No. A00200000350, First South Meadowlark Lane, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range (uR/h) Ticket No. Method* (pCi/g)
V-l** 15 - 18 NAX 828 OCS 1.9
V-2 14 - 19 NAX 827 OCS 2.0
V-3 14 - 19 NAX 826 OCS 2.4
V-4 15 - 17 NAX 825 OCS 1.4
V-5*** 15 - 18 NAX 824 OCS 1.7
V-6*** 14 - 17 NAX 823 OCS 1.2
V-7*** 13 - 19 NAX 822 OCS 1.5
See Appendix Figure 2.1 for the verification areas.
*OCS = Opposed Crystal System
**The composite sample included soil samples taken from MS-000701-VL.
***The composite samples included soil samples taken from MS-00703-VL.
MM:JEK:04-02-93
MS-00702.VL WP51
REV032293
7
10 on 40
i—i—i—i—i—r
FIRST SOUTH MEADOWLARK LANE
V-1 V-7
15-18 13-19
® V-3 10 10 V-2 14-19 6 h\ 14-19 .tF
12-15 10 10
10 ; (E) ; v:::v::::-: V-4
12 15-17 V-6 16-18 V-1 14-17
16-17
• < 6 )•
10
V-5
15-18
10
15-18
LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE:RATES IN /iR/h
ASSESSED AREA IDENTIFIER:
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION j
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION\ "j
AVERAGE;EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION ;
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE •
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
26
24
18
SCALE IN FEET
.:. 20 : 10 :• 0 20
12
RM00702V 04/34/93 TUT/529
14
15-16
40
18
.——*-
NORTH
20
15-16
THIS DRAWING, PREPARED FOR THE DECONTAMINATION AND:
DECOMMISSIONING PROGRAM. IS FOR THE SOLE USE OF THg
U.S. DEPARTMENT OF ENERGY AND ITS CONTRACTORS. IT IS:...
NOT ALAND SURVEY PLAT. UTIUTY LOCATION PLAT; OR OTHER
IMPROVEMENT SURVEY PLAT AND:IS NOT T0 BE RELIED UPON
FOR THE ESTABLISHMENT OF FENCE. BUILDING. OR OTHER
.FUTURE..IMPROVEMENT.LINES...
24 28
AS^BUIOT
'FIGURE 2.1"
EXTERIOR EXTENT OF CONTAMINATION
RESIDENCE-NO. OF OCCUPANTS
NON-RESIDENCE—MAN-HRS./WK.
INSTRUMENT NO. SURVEYOR
SURVET DATE
VERIFICATION
BY CK. A.E. APP. NO. DATE BY CK. A.E. APP.
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE, COLORADO
DESIGNED:
SUBMITTED:
PARCEL NO. A00200000350
FIRST SOUTH MEADOWLARK LN.
MONTICELLO. UTAH
£ Geotech, Inc.
"34
APPROVAL DOE
MS-00702-VL
"S-B00702-V1 ,HT1 OFI
38
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS, INC.
GRAND JUNCTION OFFICE
P. 0. BOX 2567
GRAND JUNCTION. COLORADO 81502
JUL 2 91993
Donald N. Leske
Project Manager, Monticello Projects
U.S. Department of Energy
P. 0. Box 2567
Grand Junction, 81502
Dear Mr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil, indoor radon daughter
concentration, and indoor gamma exposure rate at this property.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely
Gretchen A. Pierce
Pollutant Assessments Group
Location Number:
Location Address:
MS00702
A00200000350
1st South Meadowlark Lane
Monticello. Utah 84535
Property Owner:

Attachments
HEALTH AND SAFETY RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
A00200000350,1ST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH (MS00702)
S.K. Mather
July 1993
Work performed by the
POLLUTANT ASSESSMENTS GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
UST OF TABLES v
ACKNOVrTJEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from A00200000350, 1st South
Meadowlark Lane, Monticello, Utah (MS00702) 5
v
ACKNOWLEIXJMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge G. A. Pierce for analysis of soil samples and M.K. Jensen and A.R.
Jones for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1992, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at
A00200000350, 1st South Meadowlark Lane, Monticello, Utah. The Pollutant
Assessments Group (PAG) of Oak Ridge National Laboratory was assigned the
responsibility of verifying the data supporting the adequacy of remedial action and
confirming the site's compliance with DOE guidelines. The PAG found that the
site successfully meets the DOE remedial action objectives. Procedures used by
the PAG are described in the Pollutant Assessments Group Procedures Manual
(ORNL, 1992).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT A0O20OOO0350, 1ST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH (MS00702)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War II. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Pollutant Assessments
Group of the Health and Safety Research Division at Oak Ridge National Laboratory under DOE
contract DE-AC05-84OR21400 with Martin Marietta Energy Systems, Inc.
2
During 1992, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a vacant lot located at A0O20O000350, 1st South Meadowlark Lane,
Monticello, Utah. The remedial action plan required excavation of all exterior contamina-
tion. When the excavation was completed, the property was resurveyed, including soil
sampling, to ensure the removal of all contamination, backfilled with uncontaminated
material, and restored to a condition comparable to that which existed prior to remedial
action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Pollutant Assessments Group (PAG) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the A002O0000350,
1st South Meadowlark Lane site. This report describes the methods and results of that
verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 73 yd3 of mill tailings
6 inches deep. During the actual removal process, a total of 121 yd3 of contaminated
earth and uranium mill tailings, 10 inches deep were removed from a 364 m2 area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of gamma scans with a scintillometer, ground-level
and basement scans of the building and a surface scan of the exterior and soil sampling.
Samples representative of the bottom 15-cm (6-in.) soil layers of 7 excavated areas were
collected and blended to form representative composite soil samples for each verification
area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Exterior surface gamma measurements taken by Geotech from the excavated areas
prior to backfilling ranged from 13 to 19 uR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. There were 7 excavated areas for this
property. Geotech's analysis of these samples showed ^Ra concentrations from 1.2 to 2.4
pCi/g in the composite sample. ORNL PAG obtained four of these soil samples and
performed a confirmatory analysis, which showed ^Ra concentrations from 1.3 to 3.0
pCi/g. These values are below the DOE guideline value of 15 pCi/g for soil layers >15
cm below the surface (Table 1). Results of Geotech and ORNL soil sample analyses are
given in Table 2.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
One discrepancy was noted in that the DOE inclusion letter was not located in the folio.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to 222Rn Average annual radon proge- 0.03 WL
progeny ny concentration (including
background)
(DOE 1990)
5
Table 2. Results of ORNL analysis of Geotech soil samples
from A00200000350, 1st South Meadowlark Lane, Monticello Utah (MS00702)
^Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No* (cm)
X3 * NAX-828 15-30 3.0 1.9
X2 NAX-827 15-30 1.8 2.0
X3 NAX-826 15-30 1.6 2.4
X4 NAX-825 15-30 1.3 1.4
" An X-type sample is a split of the sample taken by the remedial action contractor.
b Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
The composite sample included soil samples taken from MS00701.
The composite samples included soil samples taken from MS00703.
6
REFERENCES
Abramiuk I. N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00702, Address: A00200000350, 1st South Meadowlark
Lane, Monticello, Utah 84535, Geotech, Grand Junction, Colorado, April 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1992. Pollutant Assessments Group Procedures Manual ORNL/TM-
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
DOE ID NO.: MS-00703 .
Property Address: Parcel No. A00200000360, First South Meadowlark Lane
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
RUST Geotech Inc. of Energy (DOE)
YES NO NOT TAKEN YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2. [X]* [ ] [ ] b<] [ 1 [ 1
In-situ [X] Lab [ ]
Ra-226 is ^ 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2. [X]
In-situ [ ] Lab [X]
Interior gamma is < 20 //R/h
above background in any
occupied or habitable
structure. [ ]
The radon decay-product
concentration in any
occupied or habitable
structure is < 0.02
working level or, at
most, 0.03 working level. [ ]
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21. [ ]
[ ] [ 1 [<] [ ] [ ]
[ ] IX] [ ] [ ] [)Q
(Vacant Lot)
[ ] [X] [ ] [ ] M
(Vacant Lot)
[X] [ ] [ ] DC] [ ]
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Decontamination and
Decommissioning [ ] [ ] [X] [ ] [ ] [<]
Program (Rev. 03/02/87).
COMMENTS: *The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal ba
1II1III111N
SFCERTI FED Illlllll
8
DEC Q a 1993
>0S MANAGEMENT
SFMS-00703
DOE ID NO.: MS-0070C
RUST GEOTECH INC. RECOMMENDATION
Based on the RUST Geotech Inc. evaluation, I recommend this property for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
C/z/<tl
Date
on and Decommissioning
Program Manager
RUST Geotech Inc.
DOE UMTRA EVALUATION
\& Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental
standards were applied per 40 CFR 192.21.
Decontaminatidfrand Decommissioning Program Date
Certification Official
Department of Energy
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00703-VL
ADDRESS: PARCEL NO. A00200000360,
FIRST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH 84535
JUNE 1993
if u—
Prepared for
Decontamination and Decommissioning Program
Division of Facilities and Site Decommissioning
i •
Department of Energy
by
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
Harr>y A. Perry
RUST Geotech Inc. has been granted authorization to conduct remedial action
under the Decontamination and Decommissioning Program. Remedial action was done
in accordance with the Environmental Protection Agency Standards for Cleanup of
Land and Buildings Contaminated with Residual Radioactive Materials from
Inactive Uranium Processing sites, 40 CFR 192.12, 192.20-23.
II1II11111IR
SFOCPLRPTS •Illilllll
SFMS-09043
TABLE OF CONTENTS
Section Page
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification . 5
4.0 APPENDIX 6
DOE ID NO.: MS-00703-VL
1.0 SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Decontamination and Decommissioning Program with the primary
objective of reducing the potential hazard to the public due to
long-term exposure to low-level radioactivity associated with the
offsite mill tailings derived from the former U.S. Atomic Energy
Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to
provide additional sources of vanadium needed during World War II.
Various government agencies operated the mill until 1947. The AEC
obtained the mill in 1948 and operated it through 1959 under cost-
type contracts to provide both uranium and vanadium. Mill
operations were terminated on January 1, 1960.
The mill processed approximately one million tons of ore during the
AEC operations. Throughout the operating period, mill tailings from
the Monticello millsite were removed from the site and used for
construction-related activities in the vicinity.
1.2 Criteria for Remedial Action
The Decontamination and Decommissioning Program adopted the
"Standards for Remedial Actions at Inactive Uranium Processing Sites"
(40 CFR Part 192) for all cleanup activities under the MVP Project.
These standards were prepared by the Environmental Protection
Agency (EPA) to establish guidelines for the control of tailings
piles and the cleanup of buildings and open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the
EPA standards. The Remedial Action Contractor was notified of the
inclusion of this property into the Decontamination and
Decommissioning Program and was authorized by the DOE to conduct
remedial action as required to bring the property into conformance
with the EPA standards.
1
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
DOE ID NO.: MS-00703-VL
MS-00703-VL
Lot 36, Meadowlark Acres Subdivision,
City of Monticello, County of San Juan,
State of Utah
Parcel No. A00200000360,
First South Meadowlark Lane
Monticello, Utah 84535

Vacant Lot (VL)
Not applicable; inclusion requested by
the Remedial Action Contractor
December 9, 1991
RUST Geotech Inc.
April 3, 1992
DLB Unlimited, Inc.
P.O. Box 40513
Grand Junction, Colorado
August 31, 1992
October 28, 1992
Interior: 0 cubic yards
Exterior: 281 cubic yards
845 square meters (m3)
June 1993
2
DOE ID NO.: MS-00703-VL
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual
radioactive material (Appendix Figure 2.1). Once excavation was
complete, the affected area was resurveyed for possible remaining
residual radioactive material and, upon attaining satisfactory
results, was backfilled with uncontaminated material. The property
was restored to a physical condition comparable to that which existed
prior to remedial action activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified contamination, 6 inches deep,
within the property. The remedial action process included the removal
of approximately 281 cubic yards of residual radioactive material,
10 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00703-VL
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by RUST Geotech Inc. during
May 1991, as described in the final REA dated April 1992.
Appendix Figure 2.1 shows the extent of assessed contamination
and identifies the area recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to
backfilling. Following the gamma scan, soil samples
representative of the 6-inch-thick soil layer at the bottom of
the excavation were collected. These samples were blended to
form composite samples representing the verification areas
(Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined
during the gamma scan, ranged from 13 microroentgens per
hour (uR/h) to 19 uR/h (Appendix Figure 2.1). The results of
analyses for radium-226 in 14 composite soil samples ranged
from 1.0 picocurie per gram (pCi/g) to 2.8 pCi/g (Appendix
Table 3.1). The composite samples representing Areas V-l, V-2,
and V-3 included soil samples taken from MS-00702-VL
(Areas V-5, V-6, and V-7). The composite samples representing
Areas V-ll, V-12, V-13, and V-14 included soil samples taken
from MS-00704-VL (Areas V-l, V-2, V-3, and V-4).
4
DOE ID NO.: MS-00703-VL
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property
to the extent required by the EPA standards (40 CFR 192.12,
192.20-23), as indicated in the Certification Data Summary below.
Therefore, the property located at Parcel No. A00200000360, First
South Meadowlark Lane, in Monticello, Utah, is recommended for
certification as required by the Decontamination and
Decommissioning Program guidelines, and the appropriate records
should be documented.
Certification Data Summary
Applicability Standards Survey Results
Habitable Structures
Exposure Rate: Shall not exceed 20 uR/h
above background.
Not applicable:
vacant lot.
Radon Decay-Product
Concentrat ion:
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Not applicable:
vacant lot.
Land
Radium-226 Concentration
in Surface Soil:
Shall not exceed 5 pCi/g
above background* in the
15-cm surface layer,
averaged over 100 m3.
< 5 pCi/g above
background.
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below the
surface, averaged over
100 m3.
Soil sample results
ranged from 1.0 pCi/g
to 2.8 pCi/g.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00703-VL
4.0 APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00703-VL
Address: Parcel No. A00200000360, First South Meadowlark Lane, Monticello, Utah
Area
Exposure-Rate
Range (uR/h)
Soil Sample
Ticket No.
Meas.
Method*
Radium-226
(pCi/g)
V-l**
V-2**
V-3**
V-4
V-5
V-6
V-7
V-8
V-9
V-10
V-ll***
V-12***
V-13***
V-14***
13
14
15
14
15
14
15
15
15
14
13
15
15
15
19
17
18
19
19
18
18
18
19
18
15
17
16
18
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
822
823
824
821
820
819
818
817
816
815
100
098
389
388
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
1.5
1.2
1.7
2.2
2.2
2.2
2.3
1.7
2.6
1.0
2.2
2.8
1.8
2.4
See Appendix Figure 2.1 for the verification areas.
*OCS » Opposed Crystal System
**The composite samples included soil samples taken from MS-00702-VL.
***The composite samples included soil samples taken from MS-00704-VL.
MM-JEK:05-03-93
MS-00703.VL WP51
REV032293
7
10
Y
i
10
12 14 16
T
18
T
20
"T
22 24
i—r
26
T
28
FIRST SOUTH MEADOWLARK LANE
X7T.:
V-11 V-1 V-4 V-10
13-15 3-19 14-19 14-18
10 10 10 10 nv.vi
12-15
V-5 V-2
15-19 14-17 15 19 12
V-12 10 10 V-1 10 15-17 16-17
10 10
V-6
14-18 5 18
V-13
10 10 15-16
6 10
0
15 18
10
V-14 V-3 15-16
• 10 15-18 15-18 V:
30 32
SCALE IN FEET:
J L
12
20 10; o;
RM00703V 05/18/93:TMT/328:
20:. 40:
I I I L
14 16 18
NORTH :
_J L
20
THIS DRAWING-, PREPARED FOR THE DECONTAMINATION AND
DECOMMISSIONING PROGRAM. IS FOR THE SOLE USE OF THE
U.S. DEPARTMENT OF ENERGY AND ITS CONTRACTORS. IT IS •
NOT A LAND SURVEY PLAT. UTILITY LOCATION PLA*. OR OTHER
IMPROVEMENT:SURVEY:PLAT AND IS NOTTO BE RELIED UPON
FOR THE ESTABLISHMENT OF FE^CE. BUfLDING. OjR OTHER:
FUTURE IMPROVEMENT LINES.
22
J L
24
34 36 38
T"
40 -4
LEGEND
28
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN /uR/h
ASSESSED AREA IDENTIFIER;
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION .-j j
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
' BOU NDARY' OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE
26
24
RAQIOLOGICAIi AiS-fBliJIUT
-FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
22
20
18
16
J I I L
NO. DATE
RESIDENCE-NO. OF OCCUPANTS
HON-RESIDENCE-MAN-HRS WK
INSTRUMENT NO SURVEYOR
SURVEY DATE
VERIFICATION
BY CK. A.E. APR NO OATE
14
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE, COLORADO
PARCEL NO. A00200000360
RM ENG
FIRST SOUTH
MEADOWLARK LANE
MONTICELLO, UTAH
12
DATE APPROVAL OOE
HURTOBOIKN INC
MS-00703-VL
26 28 30 32 34
NC3-B00703-V1 «HT1 OF1
36 38 40 4
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS, INC.
GRAND JUNCTION OFFICE
P. O. BOX 2567
GRAND JUNCTION, COLORADO 81502
AUG 3 0 1993
Donald N. Leske
Project Manager, Monticello Projects
U.S. Department of Energy
P. 0. Box 2567
Grand Junction, CO 81502
Dear Mr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Gretchen A. Pierce
Pollutant Assessments Group
Location Number: MS00703
Location Address: A00200000360. 1st South Meadowlark Lane
Monticello. Utah 84535
Property Owner:

Attachments
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
A00200000360,1ST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH (MS00703)
A.R. Jones
August 1993
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from A00200000360, 1st South
Meadowlark Lane, Monticello, Utah (MS00703) 5
v
ACKNOWI^IXJMEJNTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge M. K Jensen for analysis of soil samples and S. K. Mather and M.K
Jensen for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1992, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at
A00200000360, 1st South Meadowlark Lane, Monticello, Utah. The
Environmental Technology Section (ETS) of Oak Ridge National Laboratory was
assigned the responsibility of verifying the data supporting the adequacy of
remedial action and confirming the site's compliance with DOE guidelines. The
ETS found that the site successfully meets the DOE remedial action objectives.
Procedures used by the ETS are described in the Environmental Technology
Section Procedures Manual (ORNL, 1993).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT A00200000360, 1ST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH (MSO0703)*
IJNTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War II. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Environmental
Assessment Group of the Health Sciences Research Division at Oak Ridge National Laboratory under
DOE contract DE-AC05-84OR21400 with Martin Marietta Energy Systems, Inc.
2
During 1992, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a vacant lot located at A00200000360, 1st South Meadowlark Lane,
Monticello, Utah. The remedial action plan required excavation of all exterior contamina-
tion. When the excavation was completed, the property was resurveyed, including soil
sampling, to ensure the removal of all contamination, backfilled with uncontaminated
material, and restored to a condition comparable to that which existed prior to remedial
action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Environmental Technology Section (ETS) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the A00200000360,
1st South Meadowlark Lane site. This report describes the methods and results of that
verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 168 yd3 of mill
tailings 6 inches deep. However, during the actual removal process, a total of 281 yd3 of
contaminated earth and uranium mill tailings, 10 inches deep were removed from a 845 m2
area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of gamma scans with a scintillometer and soil
sampling. Samples representative of the bottom 15-cm (6-in.) soil layers of 14 excavated
areas were collected and blended to form representative composite soil samples for each
verification area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Exterior surface gamma measurements taken from the excavated areas prior to backfilling
ranged from 13 to 19 uR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. There were 14 excavated areas for this
property. Geotech's analysis of these samples showed ^Ra concentrations from 1.0 to 2.8
pCi/g in the composite sample. ORNL PAG obtained a percentage of these soil samples
and performed a confirmatory analysis, which showed ^Ra concentrations from 1.5 to 3.0
pCi/g. These values are below the DOE guideline value of 15 pCi/g for soil layers >15
cm below the surface (Table 1). Results of Geotech and ORNL soil sample analyses are
given in Table 2.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first IS cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to mRn
progeny
Average annual radon proge-
ny concentration (including
background)
0.03 WL
(DOE 1990)
5
Table 2. Results of ORNL analysis of Geotech soil samples
from A00200000360, 1st South Meadowlark Lane, Monticello Utah (MS00703)
aRa concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No* (cm)
X4 NAX-821 >15 1.5 2.2
X7 NAX-818 >15 2.8 Z3
X9 NAX-816 >15 3.0 2.6
" An X-type sample is a split of the sample taken by the remedial action contractor.
b Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
6
REFERENCES
Abramiuk I. N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00703, Address: A00200000360, 1st South Meadowlark
Lane, Monticello, Utah 84535, Geotech, Grand Junction, Colorado, June 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1993. Environmental Technology Section Procedures Manual. ORNL/TM-
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
DOE ID NO.: MS-00704 •
Property Address: Parcel No. A00200000370, First South Meadowlark Lane
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
RUST Geotech Inc.
YES NO NOT TAKEN
U.S. Department
of Energy (DOE)
YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2.
In-situ [ ] Lab [X]
Interior gamma is ^ 20 //R/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is ^ 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21.
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Decontamination and
Decommissioning
Program (Rev. 03/02/87).
[X]* [ ] [ ]
[X] [ ] [ ]
[ ] [ ] [X]
(Vacant Lot)
[ ] [X] [ ]
[ ] [ ] [X]
f/J [ ] [ 1
[ } t 1
[ ]
b4
[ ] [ ] [X] [ ] [ ] bC]
(Vacant Lot)
[ ] [ ] v<3
COMMENTS: *The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background. „
^ DLU 0 •• 1S93
•1111111111 milium %^s5fe
SFCERTI FED SFMS-00704
DOE ID NO.: MS-00704
RUST GEOTECH INC., RECOMMENDATION
Based on the RUST Geotech Inc., evaluation, I recommend this property for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
UJ Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental
standards were applied per 40 CFR 192.21.
Decontamfnation and Decommissioning
Program Manager
RUST Geotech Inc.
Date
DOE UMTRA EVALUATION
DBCtfntamination and Dei
Certification Official
Department of Energy
i *Q ^
am Date
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00704-VL
ADDRESS: PARCEL NO. A00200000370,
FIRST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH 84535
JUNE 1993
Prepared for
Decontamination and Decommissioning Program
Division of Facilities and Site Decommissioning
Department of Energy
by
RUST Geotech, Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
' HarryA. Perry
Program Director
RUST Geotech Inc. has been granted authorization to conduct remedial action
under the Decontamination and Decommissioning Program. Remedial action was done
in accordance with the Environmental Protection Agency Standards for Cleanup of
Land and Buildings Contaminated with Residual Radioactive Materials from
Inactive Uranium Processing Sites, 40 CFR 192.12, 192.20-23.
nun
SFOCPLRPTS mini
SFMS-09043
TABLE OF CONTENTS
Section 2&3S.
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
i
DOE ID NO.: MS-00704-VL
1.0 SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Decontamination and Decommissioning Program with the primary
objective of reducing the potential hazard to the public due to
long-term exposure to low-level radioactivity associated with the
offsite mill tailings derived from the former U.S. Atomic Energy
Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to
provide additional sources of vanadium needed during World War II.
Various government agencies operated the mill until 1947. The AEC
obtained the mill in 1948 and operated it through 1959 under cost-
type contracts to provide both uranium and vanadium. Mill
operations were terminated on January 1, 1960.
The mill processed approximately one million tons of ore during the
AEC operations. Throughout the operating period, mill tailings from
the Monticello millsite were removed from the site and used for
construction-related activities in the vicinity.
1.2 Criteria for Remedial Action
The Decontamination and Decommissioning Program adopted the
"Standards for Remedial Actions at Inactive Uranium Processing Sites"
(40 CFR Part 192) for all cleanup activities under the MVP Project.
These standards were prepared by the Environmental Protection
Agency (EPA) to establish guidelines for the control of tailings
piles and the cleanup of buildings and open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the
EPA standards. The Remedial Action Contractor was notified of the
inclusion of this property into the Decontamination and
Decommissioning Program and was authorized by the DOE to conduct
remedial action as required to bring the property into conformance
with the EPA standards.
1
DOE ID NO.: MS-00704-VL
.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
MS-00704-VL
Lot 37, Meadowlark Acres Subdivision,
City of Monticello, County of San Juan,
State of Utah
Parcel No. A00200000370,
First South Meadowlark Lane
Monticello, Utah 84535

Vacant Lot (VL)
Not applicable; inclusion requested by
the Remedial Action Contractor
December 9, 1991
RUST Geotech Inc.
April 3, 1992
DLB Unlimited, Inc.
P.O. Box 40513
Grand Junction, Colorado
August 31, 1992
October 28, 1992
Interior: 0 cubic yards
Exterior: 326 cubic yards
983 square meters (m2)
June 1993
DOE ID NO.: MS-00704-VL
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual
radioactive material (Appendix Figure 2.1). Once excavation was
complete, the affected area was resurveyed for possible remaining
residual radioactive material and, upon attaining satisfactory
results, was backfilled with uncontaminated material. The property
was restored to a physical condition comparable to that which existed
prior to remedial action activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified contamination, 6 inches deep,
within the property. The remedial action process included the removal
of approximately 326 cubic yards of residual radioactive material,
10 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00704-VL
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by RUST Geotech Inc. during
May 1991, as described in the final REA dated April 1992.
Appendix Figure 2.1 shows the extent of assessed contamination
and identifies the area recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to
backfilling. Following the gamma scan, soil samples
representative of the 6-inch-thick soil layer at the bottom of
the excavation were collected. These samples were blended to
form composite samples representing the verification areas
(Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined
during the gamma scan, ranged from 13 microroentgens per
hour (uR/h) to 18 ^R/h (Appendix Figure 2.1). The results of
analyses for radium-226 in 17 composite soil samples ranged
from 1.1 picocuries per gram (pCi/g) to 2.8 pCi/g (Appendix
Table 3.1). The composite samples representing Areas V-l, V-2,
V-3, and V-4 included soil samples taken from MS-00703-VL
(Areas V-ll, V-12, V-13, and V-14). The composite samples
representing Areas V-14, V-15, V-16, and V-17 included soil
samples taken from MS-00705-VL (Areas V-12, V-13, V-14, and
V-15).
4
DOE ID NO.: MS-00704-VL
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property
to the extent required by the EPA standards (40 CFR 192.12,
192.20-23), as indicated in the Certification Data Summary below.
Therefore, the property located at Parcel No. A00200000370, First
South Meadowlark Lane, in Monticello, Utah, is recommended for
certification as required by the Decontamination and
Decommissioning Program guidelines, and the appropriate records
should be documented.
Certification Data Summary
Applicability Standards Survey Results
Habitable Structures
Exposure Rate: Shall not exceed 20 uR/h
above background.
Not applicable:
vacant lot.
Radon Decay-Product
Concentration:
Annual average shall not
exceed 0.02 HL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Not applicable:
vacant lot.
Land
Radium-226 Concentration
in Surface Soil:
Shall not exceed 5 pCi/g
above background* in the
15-cm surface layer,
averaged over 100 mJ.
< 5 pCi/g above
background.
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below the
surface, averaged over
100 m*.
Soil sample results
ranged from 1.1 pCi/g
to 2.8 pCi/g.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00704-VL
4.0 APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00704-VL
Address: Parcel No. A00200000370, First South Meadowlark Lane, Monticello, Utah
Area
Exposure-Rate
Range (uR/h)
Soil Sample
Ticket No.
Meas.
Method*
Radium-226
(PCi/g)
V-l**
V-2**
V-3**
V-4**
V-5
V-6
V-7
V-8
V-9
V-10
V-ll
V-12
V-13
V-14***
V-15***
V-16***
V-17***
13
15
15
15
14
14
15
15
13
13
14
14
14
13
13
14
14
15
17
16
18
17
16
16
18
18
17
16
17
16
15
16
16
16
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
100
098
389
388
099
385
386
387
384
383
382
381
380
376
377
378
379
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
2.2
2.8
1.8
2.4
1.9
1.3
1.7
1.2
1.4
1.8
2.6
2.0
1.6
2.5
1.4
1.1
1.4
See Appendix Figure 2.1 for the verification areas.
*OCS » Opposed Crystal System
**The composite samples included soil samples taken from MS-00703-VL.
***The composite samples included soil samples taken from MS-00705-VL.
MM-JEK:05-03-93
MS-00704.VL WP51
REV032293
7
12 14 16 32 34 36
FIRST SOUTH MEADOWLARK LANE
v. 10
•10
10
SCALE IN FEET
X i
20.:.. 10 .:... 0 •:
RM$0704V 0^/03/93 jTMT/S29 \
I j j L
20
10
10
10
15-16
10
10
V-13
14-16
• i v.-
10
: 10
40NORTH
J L
THIS DRAWING.: PREPARED FOR THE DECONTAMINATION ANP:
DECOMMISSIONING PROGRAM, IS TOR THE SOLE USE OF THE
U:S,. p.EPARTM.ENT OF^.ERGY.ANp. US .C0NJRAQT0RS, fl )S....
NOT A: LAND SURVEY PLAT. UTILITY LOCATION PLAT, OR OTHER
IMPROVEMENT SURVEY PLAT AND IS NOT TO BE RELIED UPON
FOR THE ESTABLISHMENT OF FENCE, BUILDING. OR OTHER
FUTURE IMPROVEMENT LINES.
J L
12
LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN nR/b
ASSESSED AREA IDENTIFIER^
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION j
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION'::
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE ••
28
26
24
22
20
18
RAD^
^FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
16
RESIDENCE-NO. Of OCCUPANTS
NON-RESIDENCE —MAN-MRS WK
INSTRUMENT NO SURVEYOR
SURVEY DATE
VERIFICATION
BY CK A.E. APR. NO OATE
14
BY CK. A.E. APP
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE, COLORADO
EMS
SUBMITTED:
31
PARCEL NO. A00200000370
FIRST SOUTH
MEADOWLARK LANE
MONTICELLO, UTAH
12
RUCTowracH
DATE APPROVAL OOE
MS-00704-VL
"3-B00704-V1SHT1 OF1
12 14 18 24 28 30 34 36 38 40
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS, INC.
GRAND JUNCTION OFFICE
P. O. BOX 2S67
GRAND JUNCTION, COLORADO 81502
SEP 2 £ 1993
Donald N. Leske
Project Manager, Monticello Projects
U.S. Department of Energy
P. 0. Box 2567
Grand Junction, 81502
Dear Mr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil at this property.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Gretchen A. Pierce
MVP/IVC Project Manager
Environmental Assessment Group
Location Number: MS00704
Location Address: A00200000370. 1st South Meadowlark Lane
Monticello. Utah 84535
Property Owner:

Attachments
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
A00200000370,1ST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH (MS00704)
A.R. Jones
September 1993
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIHCATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from A00200000370, 1st South
Meadowlark Lane, Monticello, Utah (MS00704) 5
v
ACKNOWLELX/MENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge M.K. Jensen for analysis of soil samples and S.K Mather and M.K
Jensen for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1992, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at
A00200000370, 1st South Meadowlark Lane, Monticello, Utah. The
Environmental Technology Section (ETS) of Oak Ridge National Laboratory was
assigned the responsibility of verifying the data supporting the adequacy of
remedial action and confirming the site's compliance with DOE guidelines. The
ETS found that the site successfully meets the DOE remedial action objectives.
Procedures used by the ETS are described in the Environmental Technology
Section Procedures Manual (ORNL, 1993).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT A00200000370, 1ST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH (MS00704)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War II. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Environmental
Assessment Group in the Environmental Technology Section of the Health Sciences Research
Division at Oak Ridge National Laboratory under DOE contract DE-AC05-84OR21400 with Martin
Marietta Energy Systems, Inc.
2
During 1992, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a vacant lot located at A002(XXKX)370, 1st South Meadowlark Lane,
Monticello, Utah. The remedial action plan required excavation of all exterior contamina-
tion. When the excavation was completed, the property was resurveyed, including soil
sampling, to ensure the removal of all contamination, backfilled with uncontaminated
material, and restored to a condition comparable to that which existed prior to remedial
action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Environmental Technology Section (ETS) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the A0O20O0O0370,
1st South Meadowlark Lane site. This report describes the methods and results of that
verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 196 yd3 of mill
tailings 6 inches deep. However, during the actual removal process, a total of 326 yd3 of
contaminated earth and uranium mill tailings, 10 inches deep were removed from a 983 m2
area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of gamma scans with a scintillometer of the
exterior and soil sampling. Samples representative of the bottom 15-cm (6-in.) soil layers
of 17 excavated areas were collected and blended to form representative composite soil
samples for each verification area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Exterior surface gamma measurements taken from the excavated areas prior to
backfilling ranged from 13 to 18 uR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. There were 17 excavated areas for this
property. Geotech's analysis of these samples showed ^Ra concentrations from 1.1 to 2.8
pCi/g in the composite sample. ORNL ETS obtained a percentage of these soil samples
and performed a confirmatory analysis, which showed ^Ra concentrations from 1.7 to 2.0
pCi/g. These values are below the DOE guideline value of 15 pCi/g for soil layers >15
cm below the surface (Table 1). Results of Geotech and ORNL soil sample analyses are
given in Table 2.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to ^Rn
progeny
Average annual radon proge-
ny concentration (including
background)
0.03 WL
(DOE 1990)
5
Table 2. Results of ORNL analysis of Geotech soil samples
from A00200000370,1st South Meadowlark Lane, Monticello Utah (MS00704)
^Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No.4 (cm)
X9 NAX-384 >15 1.7 1.4
X12 NAX-381 >15 2.0 2.0
" An X-type sample is a split of the sample taken by the remedial action contractor.
b Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
6
REFERENCES
Abramiuk I. N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00704, Address: A00200000370, 1st South Meadowlark
Lane, Monticello, Utah 84535, Geotech, Grand Junction, Colorado, June 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1993, Environmental Technology Section Procedures Manual. ORNL/TM-
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
4-3
DOE ID NO.: MS-00705
Property Address: Parcel No. A00200000380, First South Meadowlark Lane
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
Ra-226 is <; 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
Ra-226 is ^ 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2.
In-situ [ ] Lab [X]
Interior gamma is < 20 fjR/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is ^ 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21.
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Decontamination and
Decommissioning
Program (Rev. 03/02/87).
RUST Geotech Inc.
YES NO NOT TAKEN
IX]* [ ] [ ]
[X] [ ] [ ]
[ ] [X] [ ]
[] [] [X]
U.S. Department
of Enerov (DOE)
YES NO NOT TAKEN
ty] [ J [ 1
[] [] [X] [ ] [ ] M
(Vacant Lot)
[] [] [X] [ ] [ 1 IM
(Vacant Lot)
[ 1 [ ]
t ] [ ] iy$
COMMENTS: *The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background.
ffl
Ililllllllll
SFCERTlFED
Illlllll
SFMS-00705
DEC 0~ 1993
RECORDS MANAGEMEN'
DOE ID NO.: MS-0070L
RUST GEOTECH INC. RECOMMENDATION
Based on the RUST Geotech Inc. evaluation, I recommend this property for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
f-X Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental
standards were applied per 40 CFR 192.21.
Decontamination and Decommissioning
Program Manager
RUST Geotech Inc.
Date
DOE UMTRA EVALUATION
Certification Official
Department of Energy
Date
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-00705-VL
ADDRESS: PARCEL NO. A00200000380,
FIRST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH 84535
JUNE 1993
Prepared for
Decontamination and Decommissioning Program
Division of Facilities and Site Decommissioning
Department of Energy
by
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
Harry^A. Perry
Program Director
RUST Geotech Inc. has been granted authorization to conduct remedial action
under the Decontamination and Decommissioning Program. Remedial action was done
in accordance with the Environmental Protection Agency Standards for Cleanup of
Land and Buildings Contaminated with Residual Radioactive Materials from
Inactive Uranium Processing Sites, 40 CFR 192.12, 192.20-23.
SFOCPLRPTS Illlllll
SFMS-09043
TABLE OP CONTENTS
Section Page
1.0 SUMMARY ..... 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
i
DOE ID NO.: MS-00705-VL
1.0 SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Decontamination and Decommissioning Program with the primary
objective of reducing the potential hazard to the public due to
long-term exposure to low-level radioactivity associated with the
offsite mill tailings derived from the former U.S. Atomic Energy
Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to
provide additional sources of vanadium needed during World War II.
Various government agencies operated the mill until 1947. The AEC
obtained the mill in 1948 and operated it through 1959 under cost-
type contracts to provide both uranium and vanadium. Mill
operations were terminated on January 1, 1960.
The mill processed approximately one million tons of ore during the
AEC operations. Throughout the operating period, mill tailings from
the Monticello millsite were removed from the site and used for
construction-related activities in the vicinity.
1.2 Criteria for Remedial Action
The Decontamination and Decommissioning Program adopted the
"Standards for Remedial Actions at Inactive Uranium Processing Sites"
(40 CFR Part 192) for all cleanup activities under the MVP Project.
These standards were prepared by the Environmental Protection
Agency (EPA) to establish guidelines for the control of tailings
piles and the cleanup of buildings and open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the
EPA standards. The Remedial Action Contractor was notified of the
inclusion of this property into the Decontamination and
Decommissioning Program and was authorized by the DOE to conduct
remedial action as required to bring the property into conformance
with the EPA standards.
1
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
DOE ID NO.: MS-00705-VL
MS-00705-VL
Lot 38, Meadowlark Acres Subdivision,
City of Monticello, County of San Juan,
State of Utah
Parcel No. A00200000380,
First South Meadowlark Lane
Monticello, Utah 84S35

Vacant Lot (VL)
Not applicable; inclusion requested by
the Remedial Action Contractor
December 9, 1991
RUST Geotech Inc.
April 3, 1992
DLB Unlimited, Inc.
P.O. Box 40513
Grand Junction, Colorado
August 31, 1992
October 28, 1992
Interior: 0 cubic yards
Exterior: 358 cubic yards
1,079 square meters (m3)
June 1993
2
DOE ID NO.: MS-00705-VL
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual
radioactive material (Appendix Figure 2.1). Once excavation was
complete, the affected area was resurveyed for possible remaining
residual radioactive material and, upon attaining satisfactory
results, was backfilled with uncontaminated material. The property
was restored to a physical condition comparable to that which existed
prior to remedial action activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified contamination, 6 inches deep,
within the property. The remedial action process included the removal
of approximately 358 cubic yards of residual radioactive material,
10 inches deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix
Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00705-VL
3.0 VERIFICATION SUMMARY
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by RUST Geotech Inc. during
May 1991, as described in the final REA dated April 1992.
Appendix Figure 2.1 shows the extent of assessed contamination
and identifies the area recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to
backfilling. Following the gamma scan, soil samples
representative of the 6-inch-thick soil layer at the bottom of
the excavation were collected. These samples were blended to
form composite samples representing the verification areas
(Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined
during the gamma scan, ranged from 13 microroentgens per
hour (uR/h) to 16 uR/h (Appendix Figure 2.1). The results of
analyses for radium-226 in 15 composite soil samples ranged
from 1.1 picocuries per gram (pCi/g) to 2.5 pCi/g (Appendix
Table 3.1). The composite samples representing Areas V-12,
V-13, V-14, and V-15 included soil samples taken from
MS-00704-VL (Areas V-14, V-15, V-16, and V-17).
4
DOE ID NO.: MS-00705-VL
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property
to the extent required by the EPA standards (40 CFR 192.12,
192.20-23), as indicated in the Certification Data Summary below.
Therefore, the property located at Parcel No. A00200000380, First
South Meadowlark Lane, in Monticello, Utah, is recommended for
certification as required by the Decontamination and
Decommissioning Program guidelines, and the appropriate records
should be documented.
Certification Data Summary
Applicability Standards Survey ResultB
Habitable Structures
Exposure Rate: Shall not exceed 20 uR/h
above background.
Not applicable:
vacant lot.
Radon Decay-Product
Concentrat ion:
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Not applicable:
vacant lot.
Land
Radium-226 Concentration
in Surface Soil:
Shall not exceed 5 pCi/g
above background* in the
15-cm surface layer,
averaged over 100 m3.
< 5 pCi/g above
background.
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below the
surface, averaged over
100 m*.
Soil sample results
ranged from 1.1 pCi/g
to 2.5 pCi/g.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00705-VL
4.0 APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00705-VL
Address: Parcel No. A00200000380, First South Meadowlark Lane, Monticello, Utah
Area
Exposure-Rate
Range (uR/h)
Soil Sample
Ticket No.
Meas.
Method*
Radium-226
(pCi/g)
V-l
V-2
V-3
V-4
V-5
V-6
V-7
V-8
V-9
V-10
V-ll
V-12**
V-13**
V-14**
V-15**
15
13
13
13
14
13
13
14
13
13
13
13
13
14
14
16
15
16
16
15
15
16
16
15
16
16
15
16
16
16
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
NAX
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
1.9
1.7
1.2
1.5
2.0
1.9
1.7
1.7
2.1
2.0
2.3
2.5
1.4
1.1
1.4
See Appendix Figure 2.1 for the verification areas.
*OCS = Opposed Crystal System
**The composite samples included soil samples taken from MS-00704-VL.
MM-JEK:05-03-93
MS-00705.VL WP51
REV032293
7
10 28 30 34
FIRST SOUTH MEADOWLARK LANE:
10
SCALE. IN FEET
20 10 0. 20.
^ ;-RM00705V 05/07^93 TMT/S29
i i i i L
12 14 16
V-12
13-15
V-13
13-16
10:
V-14
14-16
10
10
• 15-16 -
10
V-11
13-16
1 o r.
10
10
10
10
:.\iv. 10.
10 :.y::.v— i-i-
10
10
'.'.'I.
10
;;.v.j.
40.
18
THIS 0RAWING,: PREPARED FOR THE DECONTAMINATION AND-
DECOMMISSIONING PROGRAM. IS TOR THE SOLE USE OF THE
U.S. DEPARTMENT OF ENERGY AND ITS CONTRACTORS. IT IS —
NOT A: LAND SURVEY PLAT, UTILITY LOCATION PLAT; OR OTHER
IMPROVEMENT SURVEY PLAT AND IS NOT TO BE RELIED UPON
FOR THE ESTABLISHMENT OF FENCE. BUILDING, OR OTHER
FUTURE IMPROVEMENT LINES. • •
24 26
©
12-15
12
LEGEND
ALL DEPTHS IN INCHES .
ALL EXPOSURE RATES IN /iR/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION j
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION':
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE •-
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION:
28
26
24
22
20
-FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
RESIDENCE—NO. OF OCCUPANTS
NON-RESIDENCE—MAN-HRS.'WK.
INSTRUMENT NO. SURVEYOR
SURVEY DATE
VERIFICATION
SY CK. A.E. APP NO OATE • Y CK. A.E. APP
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE. COLORAOO
DRAWN
SUBMITTED:
PARCEL NO. A00200000380
FIRST SOUTH
MEADOWLARK LANE
MONTICELLO, UTAH
Gaoracn INC
OATE APPROVAL DOE
MS-00705-VL
32 34
3-B00705-V1SHT1 OF1
36 38
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS, INC.
GRAND JUNCTION OFFICE
P. O. BOX 2567
GRAND JUNCTION, COLORADO 81502
SEP 2 3 1993
Donald N. Leske
Project Manager, Monticello Projects
U.S. Department of Energy
P. 0. Box 2567
Grand Junction, 81502
Dear Mr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil at this property.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Gretchen A. Pierce
MVP/IVC Project Manager
Environmental Assessment Group
Location Number: MS00705
Location Address: A00200000380. 1st South Meadowlark Lane
Monticello. Utah 84535
Property Owner:

Attachments
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
A00200000380,1ST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH (MS00705)
A.R. Jones
September 1993
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from A00200000380, 1st South
Meadowlark Lane, Monticello, Utah (MS00705) 5
v
AOQSIOWIJEDGMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge M. K. Jensen for analysis of soil samples and S.K. Mather and M.K.
Jensen for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1992, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at
A00200000380, 1st South Meadowlark Lane, Monticello, Utah. The
Environmental Technology Section (ETS) of Oak Ridge National Laboratory was
assigned the responsibility of verifying the data supporting the adequacy of
remedial action and confirming the site's compliance with DOE guidelines. The
ETS found that the site successfully meets the DOE remedial action objectives.
Procedures used by the ETS are described in the Environmental Technology
Section Procedures Manual (ORNL, 1993).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT A00200000380, 1ST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH (MS00705)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War II. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
*The verification of remedial action was performed by members of the Environmental
Assessment Group in the Environmental Technology Section of the Health Sciences Research
Division at Oak Ridge National Laboratory under DOE contract DE-AC05-84OR21400 with Martin
Marietta Energy Systems, Inc.
2
During 1992, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a vacant lot located at A(X)2fJ0000380, 1st South Meadowlark Lane,
Monticello, Utah. The remedial action plan required excavation of all exterior contamina-
tion. When the excavation was completed, the property was resurveyed, including soil
sampling, to ensure the removal of all contamination, backfilled with uncontaminated
material, and restored to a condition comparable to that which existed prior to remedial
action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Environmental Technology Section (ETS) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the A00200000380,
1st South Meadowlark Lane site. This report describes the methods and results of that
verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 215 yd3 of mill
tailings 6 inches deep. However, during the actual removal process, a total of 358 yd3 of
contaminated earth and uranium mill tailings, 10 inches deep were removed from a 1079
m2 area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of gamma scans with a scintillometer of the
exterior and soil sampling. Samples representative of the bottom 15-cm (6-in.) soil layers
of 15 excavated areas were collected and blended to form representative composite soil
samples for each verification area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Exterior surface gamma measurements taken from the excavated areas prior to
backfilling ranged from 13 to 16 yuR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. There were 15 excavated areas for this
property. Geotech's analysis of these samples showed ^Ra concentrations from 1.1 to 2,5
pCi/g in the composite sample. ORNL ETS obtained a percentage of these soil samples
and performed a confirmatory analysis, which showed ^Ra concentrations from 1.1 to 2.0
pCi/g. These values are below the DOE guideline value of 15 pCi/g for soil layers >15
cm below the surface (Table 1). Results of Geotech and ORNL soil sample analyses are
given in Table 2.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to ^Rn
progeny
Average annual radon proge-
ny concentration (including
background)
0.03 WL
(DOE 1990)
5
Table 2. Results of ORNL analysis of Geotech soil samples
from A00200000380, 1st South Meadowlark Lane, Monticello Utah (MS00705)
^Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No* (cm)
X5 NAX-369 >15 1.1 2.0
X10 NAX-374 >15 1.5 2.0
X12 NAX-376 >15 2.0 2.5
" An X-type sample is a split of the sample taken by the remedial action contractor.
b Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
6
REFERENCES
Abramiuk I. N.et al.1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00705, Address: A00200000380, 1st South Meadowlark
Lane, Monticello, Utah 84535, Geotech, Grand Junction, Colorado, June 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1993. Environmental Technology Section Procedures Manual. ORNL/TM-
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
DOE ID NO.: MS-00723-VL
Property Address: Parcel No. A00200000120, First South Meadowlark Lane
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
RUST Geotech Inc. Of Energy (PQE)
YES NO NOT TAKEN YES NO NOT TAKEN
Ra-226 is i 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2.
In-situ [X] Lab [ ]
Ra-226 is rs 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2.
In-situ [ ] Lab [X]
Interior gamma is <. 20 //R/h
above background in any
occupied or habitable
structure.
The radon decay-product
concentration in any
occupied or habitable
structure is £ 0.02
working level or, at
most, 0.03 working level.
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21.
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Environmental Restoration
Program (Rev. 03/02/87).
[X]* [ ] [ ]
[X] [ ] [ ]
[ 1 [ 1 IX]
(Vacant Lot)
[ ] [X] [ ]
[ ] [ ] [X]
M [ 1 I 1
[>] [ ] [ 1
[ 1 [ 1
[ ] I 1 [X] I ] [ ] 1*1
(Vacant Lot)
[ ] l>] I 1
[ ] [ ] [>1
COMMENTS: *The excavations were backfilled with materials that were
measured at the source showing that the Ra-226 concentrations are in the range
of normal background. Other surface areas were verified on the basis of gamma
exposure rates that do not exceed 30 percent above normal background. • SFCERTI FED ililllllllll
SFMS-09030
DOE ID NO.: MS-00723-VL
RUST GEOTECH INC. RECOMMENDATION
Based on the RUST Geotech Inc. evaluation, I recommend this property for:
[X] Certification by the Department of Energy.
[ ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
Harry A. Pe/ry Date
Program Manager
RUST Geotech Inc.
DOE EVALUATION
L*i Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental
standards were applied per 40 CFR 192.21.
Environmental Restoration Program
Certification Official
Department of Energy
Date
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-0O723-VL
ADDRESS: PARCEL NO. A002OO000120
FIRST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH 84535
DECEMBER 1993
Prepared for
Environmental Restoration Program
Department of Energy
RUST Geotech Inc. has been granted authorization to conduct remedial action under
the Environmental Restoration Program. Remedial action was done in accordance
with the U.S. Environmental Protection Agency "Standards for Cleanup of Land and
Buildings Contaminated with Residual Radioactive Materials from Inactive Uranium
Processing Sites," 40 CFR 192.12, 192.20-23.
by
RUST Geotech Inc.
P.O. Box 14000
Grand Junction, Colorado 81502-5504
Program Manager
TABLE OF CONTENTS
Section Pajjg
1.0 SUMMARY 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Summary of Remedial Action 2
2.0 OPERATIONS SUMMARY 3
2.1 Abstract of Remedial Action Plan 3
2.2 Previously Unidentified Contamination 3
2.3 Unanticipated Items During Remedial Action 3
2.4 Application of Supplemental Standards 3
3.0 VERIFICATION SUMMARY 4
3.1 Radiological Survey Data 4
3.1.1 Pre-Remedial Action Survey 4
3.1.2 Post-Excavation Survey 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
DOE ID NO.: MS-00723-VL
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was accepted into
the Environmental Restoration Program with the primary objective of
reducing the potential hazard to the public due to long-term exposure to
low-level radioactivity associated with the offsite mill tailings derived from
the former U.S. Atomic Energy Commission (AEC) uranium mill.
The original mill, built in 1942, was financed by the United States
Government through its agent, the Defense Plant Corporation, to provide
additional sources of vanadium needed during World War II. Various
government agencies operated the mill until 1947. The AEC obtained the
mill in 1948 and operated it through 1959 under cost-type contracts to
provide both uranium and vanadium. Mill operations were terminated on
January 1, 1960.
The mill processed approximately one million tons of ore during the AEC
operations. Throughout the operating period, mill tailings from the
Monticello millsite were removed from the site and used for construction-
related activities in the vicinity.
1.2 Criteria for Remedial Action
The Environmental Restoration Program adopted the "Standards for
Remedial Actions at Inactive Uranium Processing Sites" (40 CFR Part 192)
for all cleanup activities under the MVP Project. These standards were
prepared by the U.S. Environmental Protection Agency (EPA) to establish
guidelines for the control of tailings piles and the cleanup of buildings and
open lands.
This property was evaluated on the basis of the EPA standards by the
U.S. Department of Energy (DOE) Remedial Action Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the EPA
standards. The Remedial Action Contractor was notified of the inclusion
of this property into the Environmental Restoration Program and was
authorized by the DOE to conduct remedial action as required to bring the
property into conformance with the EPA standards.
1
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological & Engineering
Assessment (REA):
Construction Subcontractor:
Pre-Construction Conference
Record:
Notice of Final Completion
Inspection:
Volume of Material Removed:
Area Cleaned Up:
Property Completion Report
Submitted:
DOE ID NO.: MS-00723-VL
MS-00723-VL
Lot 12, Meadowlark Acres Subdivision, City
of Monticello, County of San Juan, State of
Utah
Parcel No. A0O20O00O120
First South Meadowlark Lane
Monticello, Utah 84535

Vacant Lot (VL)
Not applicable; inclusion requested by the
Remedial Action Contractor
December 31, 1991
RUST Geotech Inc.
July 27, 1992
Crowley Construction
East Route
Monticello, Utah
June 1, 1993
July 19, 1993
Interior: 0 cubic yards
Exterior: 192 cubic yards
962 square meters (m2)
December 1993
2
DOE ID NO.: MS-00723-VL
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
The remedial action plan involved removal of exterior residual radioactive
material (Appendix Figure 2.1). Once excavation was complete, the
affected area was resurveyed for possible remaining residual radioactive
material and, upon attaining satisfactory results, was backfilled with
uncontaminated material. The property was restored to a physical
condition comparable to that which existed prior to remedial action
activities.
2.2 Previously Unidentified Contamination
The radiological assessment identified contamination, 6 inches deep,
within the property. The remedial action process included the removal of
approximately 192 cubic yards of residual radioactive material, 6 inches
deep.
The differences in the extent of assessed contamination and actual
residual radioactive material removed are shown on Appendix Figure 2.1.
2.3 Unanticipated Items During Remedial Action
No unanticipated items were encountered during the remedial action
activities conducted on the property.
2.4 Application of Supplemental Standards
Supplemental standards were not applicable to the remedial action
activities conducted on the property.
3
DOE ID NO.: MS-00723-VL
3.0 VERIFICATION SUMMARY
3.1 . Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Pre-Remedial Action Survey
A radiological survey was conducted by RUST Geotech Inc. during
May 1991, as described in the final REA dated July 1992.
Appendix Figure 2.1 shows the extent of assessed contamination
and identifies the area recommended to undergo remedial action.
3.1.2 Post-Excavation Survey
A surface gamma scan with a scintillometer was conducted after
the removal of residual radioactive material and prior to backfilling.
Following the gamma scan, soil samples representative of the
6-inch-thick soil layer at the bottom of the excavation were
collected. These samples were blended to form composite
samples representing the verification areas (Appendix Figure 2.1).
Exterior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 13 microroentgens per hour (//R/h)
to 22 //R/h (Appendix Figure 2.1). The results of analyses for
radium-226 in 11 composite soil samples ranged from
1.0 picocurie per gram (pCi/g) to 8.2 pCi/g (Appendix Table 3.1).
4
DOE ID NO.: MS-00723-VL
3.2 Recommendation for Certification
Residua! radioactive materials have been removed from this property to
the extent required by the EPA standards (40 CFR 192.12, 192.20-23),
as indicated in the Certification Data Summary below.
Therefore, the property located at Parcel No. A0O20O0O0120, First
South Meadowlark Lane, in Monticello, Utah, is recommended for
certification as required by the Environmental Restoration Program
guidelines, and the appropriate records should be documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Standards
Shall not exceed 20 #vR/h
above background.
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
Survey Results
Not applicable:
vacant lot.
Not applicable:
vacant lot.
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 5 pCi/g
above background * in the
15-cm surface layer,
averaged over 100 m2.
Shall not exceed 15 pCi/g
above background* in any
15-cm-thick soil layer
more than 15 cm below
the surface, averaged
over 100 m2.
< 5 pCi/g above
background.
Soil sample results
ranged from 1.0 pCi/g
to 8.2 pCi/g.
•The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00723-VL
4.0 APPENDIX
Appendix Table:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
MM-KMA: 12-07-93
MS-00723.VL WP51
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-O0723-VL
Address: Parcel No. A00200000120, First South Meadowlark Lane, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range (//R/h) Ticket No. Method* (pCi/g)
V-l 15 - 21 NAY 649 OCS 6.0
V-2 15 - 21 NAY 650 OCS 6.7
V-3 15 - 21 NAY 651 OCS 8.2
V-4 15 - 21 NAY 652 OCS 5.1
V-5 15 - 21 NAY 653 OCS 4.0
V-6 15 - 22 NAY 654 OCS 6.5
V-7 15 - 21 NAY 655 OCS 4.6
V-8 15 - 19 NAY 656 OCS 5.3
V-9 14 - 19 NAY 657 OCS 3.6
V-10 14 - 18 NAY 658 OCS 1.0
V-ll 13 - 18 NAY 659 OCS 2.2
See Appendix Figure 2.1 for the verification areas.
*0CS = Opposed Crystal System
7
10
30
12 14 16 18 20 22 24 26
v-3
V-2 V-4 15-21 V-6 V-9 V-8
15-21 15-21 15-22 14-19 15-19
•A V-1
15-21
©
©
<
or <
o
© <
I
O
CO
to
IX
©
15-21
28
i—i—r
30 32 34 36 38 40
30
28
26
24
22
20
18
16
14
12
Y
SOUTH THIRD EAST STREET v-7
15-21
SCALE IN FEET
oc
o
20 10 0 20 40
THIS DRAWING, PREPARED FOR THE ENVIRONMENTAL RESTORATION
PROGRAM, IS FOR THE SOLE USE OF THE U.S. DEPARTMENT OF
ENERGY AND ITS CONTRACTORS. IT IS NOT A LAND SURVEY PLAT,
UTILITY LOCATION PLAT, OR OTHER IMPROVEMENT SURVEY PLAT
AND IS NOT TO BE RELIED UPON FOR THE ESTABLISHMENT OF
FENCE. BUILDING, OR OTHER FUTURE IMPROVEMENT LINES.
RM00723V 12/08/93 KWP/712
—— X
10
10 12 14 1 6 18 20 22 24 26 28
©
<D
rv/.vi
QY.Vj
12-15
12
V-1
16-17
LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN fxR/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
28
26
- 24
22
20
18
RADIOLOGICAL AS-BUILT
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
16
RESIOEHCE-NO. OF OCCUPANTS
HON-RESIOCHCE-UAN-HRS./WK.
INSTRUMENT NO.
SURVEY OATE
VERIFICATION
BY CK. A.E. APP. NO. DATE CK. A.E. APP.
14
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE, COLORADO
PARCEL NO. A00200000120
FIRST SOUTH
MEADOWLARK LANE
MONTICELLO, UTAH
APPR6VAL
12
GEOTECH INC
THTr APPAOVAItktt BATE-
DOEIONO. MS-00723-VL
owe.NO. 3-B00723-V1 SHT 1 „ 1 10
30 32 34 36 38 40
GRAND JUNCTION OFFICE
RO. BOX 2567
GRAND JUNCTION. COLORADO 81502
MAR s 01994
Donald N. Leske
Project Manager, Monticello Projects
U.S. Department of Energy
P. 0. Box 2567
Grand Junction, 81502
Dear Mr. Leske:
Radiation levels at the property identified below do not exceed the guidelines
specified by the U.S. Department of Energy for Residual Radioactive Material
at Formerly Utilized Sites Remedial Action Program (FUSRAP) and Remote Surplus
Facilities Management Program Sites (SFMP) [Revision 2, March 1987]. This
evaluation is based on an independent verification review of the Remedial
Action Contractor's completion report.
This recommendation is based upon the Independent Verification Contractor's
assessment of the 226Ra concentration in the soil and exterior gamma exposure
rate at this property.
Therefore, this property is recommended for certification by the U.S. Depart-
ment of Energy.
Sincerely,
Gretchen A. Pierce
MVP/IVC Project Manager
Environmental Assessment Group
MS00723-VL
A00200000120/ 1st South Meadowlark Lane
Monticello. Utah 84535

Monticello. Utah 84535
Vacant lot
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS INC.
Location Number:
Location Address:
Property Owner:
Owner Address:
Tenant Name:
Attachments
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE B INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
A00200000120/ 1ST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH (MS00723-VL)
A. R. Jones
March 1994
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
LIST OF FIGURES v
ACKNOWLEDGMENTS vii
ABSTRACT vii
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
GEOTECH SURVEY RESULTS 3
Gamma Measurements 3
Soil Sample Analysis 3
ORNL SURVEY RESULTS 6
Gamma Measurements 6
Soil Sample Analysis 6
CONCLUSION 6
REFERENCES 8
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL and Geotech analyses of soil samples from A002000001207 1st
South Meadowlark Lane Monticello, Utah (MS00723-VL) 5
LIST OF FIGURES
1 Property Map 7
v
1
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT AOQ200000120/ 1ST SOUTH MEADOWLARK LANE
MONTICELLO, UTAH (MS00723-VL)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War U. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 1959 to
provide both uranium and vanadium. Mill operations were terminated on January 1,1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as Gil material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
"The verification of remedial action was performed by members of the Environmental
Assessment Group in the Environmental Technology Section of the Health Sciences Research
Division at Oak Ridge National Laboratory under DOE contract DE-AC05-84OR21400 with Martin
Marietta Energy Systems, Inc.
ACJKNOWLEDGMENTS
Research for this project was sponsored by the U.S. Department of Energy, Office of
Environmental Restoration, Southwestern Area Programs. The author wishes to
acknowledge M. K. Jensen for analysis of soil samples and T. L. Meyer and G. A. Pierce
for technical reviews.
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was accepted
into the U.S. Department of Energy's (DOE's) Surplus Facilities Management Program,
with the objectives of restoring the government-owned mill site to safe levels of
radioactivity, disposing of or containing the tailings in an environmentally safe manner, and
performing remedial actions on off-site (vicinity) properties that had been contaminated by
radioactive material resulting from mill operations. During 1993, RUST Geotech Inc., the
remedial action contractor designated by DOE, performed remedial action on the vicinity
property at A00200000120/ 1st South Meadowlark Lane, Monticello, Utah. The
Environmental Technology Section (ETS) of Oak Ridge National Laboratory was assigned
the responsibility of verifying the data supporting the adequacy of remedial action and
confirming the site's compliance with DOE guidelines. The ETS found that the site
successfully meets the DOE remedial action objectives. Procedures used by ETS are
described in the Environmental Technology Section Procedures Manual (ORNL, 1993).
vii
2
During 1993, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a vacant lot located at A00200000120/ 1st South Meadowlark Lane,
Monticello, Utah. The remedial action plan required excavation of all exterior contamina-
tion, backfilling with uncontaminated material and restoration to a condition comparable
to that which existed prior to remedial action (Geotech 1993). When the excavation stage
was completed, the property was resurveyed, including soil sampling, by Geotech and by
an independent contractor to verify the data supporting the adequacy of remedial action
and to confirm the site's compliance with DOE guidelines. The Environmental
Technology Section (ETS) of Oak Ridge National Laboratory (ORNL) has been
designated the Independent Verification Contractor for the A00200000120/ 1st South
Meadowlark Lane site. This report describes the methods and results of the verification
surveys.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 174 yd3 of mill
tailings 6 inches deep. However, during the actual removal process, a total of 192 yd3 of
contaminated earth and uranium mill tailings, 6 inches deep, were removed from a 962 m2
area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
GEOTECH SURVEY RESULTS
Gamma Measurements
Exterior surface from the excavated areas prior to backfilling ranged from 13 to 22
uR/h.
Sofl Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. These samples were blended to form a
composite soil sample representative of an average over the 11 exterior verification areas.
Geotech's analysis of these samples showed ^Ra concentrations from 1.0 to 8.2 pCi/g in
the composite sample. ORNL ETS obtained a percentage of these soil samples and
performed a confirmatory analysis, which showed 226Ra concentrations from 2.6 to 10.4
pCi/g, These values are below the DOE guideline value of 15 pCi/g for soil layers >15
cm below the surface (Table 1). Results of Geotech and ORNL soil sample analyses are
given in Table 2.
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of 22SRa in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first IS cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to 222Rn
progeny
Average annual radon proge-
ny concentration (including
background)
0.03 WL
(DOE 1990)
5
Table 2. Results of ORNL and Geotech analyses of soQ samples
from A00200000120/ 1st South Meadowlark Lane, Utah (MS00723-VL)
^Ra concentration (pCi/p)
ORNL Geotech
sample sample Depth
No." No .* (cm) Confirmatory0 ORNL** Geotech
V10 NAY 649 62 6.0
Xll NAY 650 10.4 6.7
V12 NAY 651 9.1 8.2
V15 NAY 654 6.2 6.5
V17 NAY 656 4.5 53
X20 NAY 659 2.6 2.2
" An X-type sample is a split of the sample taken by the remedial action
contractor.
h Soil samples representative of the bottom 15-cm (6-in.) soil layers of the
excavated areas were taken by RUST Geotech Inc., and these samples were blended to
form composite soil samples, which represent an average over verification areas.
e ORNL performed analysis on aliquots of the composite samples taken by
Geotech (confirmatory).
d Composite samples collected by ORNL from approximately the same excavated
locations sampled by Geotech.
6
ORNL SURVEY RESULTS
Gamma Measurements
Measurements taken by ORNL over the ground surface in the excavated areas prior
to backfilling ranged from 14 to 23 uR/h (Figure 1).
Soil Sample Analysis
ORNL sampled 4 of the excavated areas prior to backfilling, collecting aliquots
representative of those areas from the bottom 15-cm (6-in.) soil layers. These samples
were blended to form 4 composite soil samples representative of an average over the
exterior verification areas. ORNL's analysis of these composite samples showed 226Ra
concentrations of 4.5 and 9.1 pCi/g. These values are below the DOE guideline value of
15 pCi/g for soil layers >15 cm below the surface (Table 1). Results of ORNL sample
analyses are given in Table 2.
CONCLUSION
The results of all Geotech and ORNL soil sample analyses show that radionuclide
concentrations are within applicable DOE guidelines. Based upon the results of the post-
remedial-action data, which are confirmed by the verification assessment data, these
radiological measurements fall below the limits prescribed by DOE guidelines. It is
concluded that the site successfully meets the DOE remedial action objectives.
VIC-
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SOUTH 3rd EAST STREET
EXPLANATION
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1st SOUTH MEADOWLARK LANE
MONTICELLO, UTAH
Figure 1 . Property Map
7
This page (7) is for the property map.
8
REFERENCES
Abramiuk, LN. et al. 1989. Monticello Remedial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction, Colorado,
for the U.S. Department of Energy, Surplus Faculties Management Program,
Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00723-VL, Address: A0020000012011st South Meadowlark
Lane, Monticello, Utah 84535, Geotech, Grand Junction, Colorado, December 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1993. Environmental Technology Section Procedures Manual. ORNL
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.
HEALTH AND SAFETY RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 40 1)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
316 SOUTH 1ST EAST STREET
MONTICELLO, UTAH (MS00062)
S.K. Mather
May 1993
Work performed by the
POLLUTANT ASSESSMENTS GROUP
Prepared by the
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81502
managed by
MARTIN MARIETTA ENERGY SYSTEMS, INC.
for the
U.S. DEPARTMENT OF ENERGY
under Contract No. DE-AC05-84OR21400
CONTENTS
LIST OF TABLES v
ACKNOWLEDGMENTS vii
ABSTRACT ix
INTRODUCTTON 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIHCATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
Radon Measurement Results 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from 316 South 1st East Street,
Monticello, Utah (MS00062) 5
v
ACKNOWLEDGMENTS
Research for this project was sponsored by the Division of Facility and Site
Decommissioning Projects, U.S. Department of Energy. The author wishes to
acknowledge G. A. Pierce for analysis of soil samples and A.R. Jones and M.K. Jensen
for technical reviews.
vii
ABSTRACT
In 1980 the site of a vanadium and uranium mill at Monticello, Utah, was
accepted into the U.S. Department of Energy's (DOE's) Surplus Facilities
Management Program, with the objectives of restoring the government-owned mill
site to safe levels of radioactivity, disposing of or containing the tailings in an
environmentally safe manner, and performing remedial actions on off-site (vicinity)
properties that had been contaminated by radioactive material resulting from mill
operations. During 1989, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at 316
South 1st East Street, Monticello, Utah. The Pollutant Assessments Group (PAG)
of Oak Ridge National Laboratory was assigned the responsibility of verifying the
data supporting the adequacy of remedial action and confirming the site's
compliance with DOE guidelines. The PAG found that the site successfully meets
the DOE remedial action objectives. Procedures used by the PAG are described
in the Pollutant Assessments Group Procedures Manual (ORNL, 1992).
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT 316 SOUTH 1ST EAST STREET
MONTICELLO, UTAH (MS00062)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the U.S. government through the
Defense Plant Corporation to provide vanadium during World War II. Various
government agencies operated the mill until 1947. In 1948 the Atomic Energy
Commission (AEC) obtained the mill and operated it under contract through 19S9 to
provide both uranium and vanadium. Mill operations were terminated on January 1, 1960.
In 1961 the mill tailings piles were leveled and graded, covered with rock and soil, and
seeded with native grasses. During 1974 and 1975, the ore stockpiles were removed from
the site, and the mill foundations were buried.
The Monticello mill site is a 78-acre tract along Montezuma Creek, south of the city
of Monticello, in San Juan County, Utah. The site is bordered on the south and southeast
by land held by the U.S. Bureau of Land Management. Other boundaries are the city of
Monticello and private property.
During the AEC era, the mill processed approximately one million tons of uranium
ore. Vanadium and uranium were the only substances extracted in the milling process.
Other constituents of the ore remained in the tailings and were not separated prior to
disposal. During the years of active mill operation, the mill tailings were normally moist,
so erosion was minimal. However, throughout the mill's operating period, area residents
used these tailings as fill material and as aggregate in mortar and concrete.
Under the authority of the Atomic Energy Act, the U.S. Department of Energy
(DOE) initiated the Surplus Facilities Management Program (SFMP) in 1978 to ensure
the safe caretaking and decommissioning of government facilities that had been retired
from service but still had radioactive contamination. In 1980 the mill site at Monticello
was accepted into the SFMP, and the Monticello Remedial Action Project (MRAP) was
established to restore the government-owned mill site to safe levels of radioactivity, to
dispose of or contain the tailings in an environmentally safe manner, and to perform
remedial actions on off-site (vicinity) properties that had been contaminated by radioactive
material resulting from mill operations. The Monticello mill site and the tailings remain in
the custody of the DOE Grand Junction, Colorado, Projects Office. In 1983 remedial
actions for vicinity properties were separated from MRAP with establishment of the
Monticello Vicinity Properties (MVP) Project (Abramiuk 1989).
""The verification of remedial action was performed by members of the Pollutant Assessments
Group of the Health and Safety Research Division at Oak Ridge National Laboratory under DOE
contract DE-AC05-84OR21400 with Martin Marietta Energy Systems, Inc
2
During 1989, RUST Geotech Inc. (Geotech), the remedial action contractor (RAC)
designated by DOE, performed remedial action on the vicinity property that is the subject
of this report, a private residence located at 316 South 1st East Street, Monticello, Utah.
The remedial action plan required excavation of all exterior contamination. When the
excavation was completed, the property was resurveyed, including soil sampling, to ensure
the removal of all contamination, backfilled with uncontaminated material, and restored to
a condition comparable to that which existed prior to remedial action (Geotech 1993).
The DOE adopted a policy to assign an independent contractor to verify the data
supporting the adequacy of remedial action and to confirm the site's compliance with
DOE guidelines. The Pollutant Assessments Group (PAG) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the 316 South 1st
East Street site. This report describes the methods and results of that verification.
PROCEDURES
Objectives
The objectives of the verification activities were to confirm (1) that available
documentation adequately and accurately describes the post-remedial-action radiological
conditions of the entire property that is to be certified and (2) that the remedial action
reduced contamination to below applicable DOE guidelines (DOE 1990).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1993)
indicates the property was evaluated by DOE on the basis of Environmental Protection
Agency standards (DOE 1990) and that excess residual radioactive materials were present.
Thus it was appropriate to designate this property for remedial action.
The pre-remedial-action survey performed by Geotech identified 59 yd3 of mill tailings
6 to 12 inches deep. However, during the actual removal process, a total of 115 yd3 of
contaminated earth and uranium mill tailings, 6 to 36 inches deep were removed from a
486 m2 area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of gamma scans with a scintillometer, ground-level
and basement scans of the building and a surface scan of the exterior and soil sampling.
Samples representative of the bottom 15-cm (6-in.) soil layers of 5 excavated areas were
collected and blended to form representative composite soil samples for each verification
area.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented in this report are gross readings. Background radiation
levels have not been subtracted. Similarly, background concentrations have not been
subtracted from radionuclide concentrations in soil samples. Applicable DOE guidelines
for protection against radiation are given in Table 1.
Gamma Measurements
Gamma exposure rate measurements taken by Geotech at the ground-level of the
residence ranged from 12 to 14 uR/h for building 1 and 14 to 22 uR/h for building 2.
Exterior surface gamma measurements taken from the excavated areas prior to backfilling
ranged from 13 to 20 /iR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
areas from the bottom 15-cm (6-in.) soil layers. There were 5 excavated areas for this
property. Geotech's analysis of these samples showed ^Ra concentrations from 1.3 to 2.7
pCi/g in the composite sample. ORNL PAG obtained these soil samples and performed a
confirmatory analysis, which showed ^Ra concentrations from 1.3 to 2.8 pCi/g. These
values are below the DOE guideline value of 15 pCi/g for soil layers >15 cm below the
surface (Table 1). Results of Geotech and ORNL soil sample analyses are given in
Table 2.
Radon Measurement Results
Radon decay-product concentration (RDC) measurements for this site were
determined by the alpha-track method. To monitor radon levels, Geotech placed two sets
of three Alpha-track detectors on the ground floor of the two buildings located on this
property for a period of approximately one year (from 11/13/89 to 12/12/90 and 09/18/91
to 10/05/92). The average annual working level (WL) of radon progeny concentration, as
determined by the Tech./Ops-Landauer Corporation, was 0.0134 for building 1 and 0.0109
for building 2, these are well below the 0.03-WL guideline given in Table 1.
CONCLUSION
Results of Geotech soil sample analysis and confirmatory split soil sample analysis by
ORNL show that radionuclide concentrations are within applicable DOE guidelines.
Based upon the results of the post-remedial-action data, which are confirmed by the
verification assessment data, these radiological measurements fall below the limits
prescribed by DOE guidelines. It is concluded that the site successfully meets the DOE
remedial action objectives.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideb'ne value
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of ^Ra in soil
above background levels,
averaged over a 100-m2 area
5 pCi/g averaged over the
first 15 cm of soil below the
surface; 15 pCi/g when ave-
raged over 15-cm-thick soil
layers more than 15 cm
below the surface
Exposure to ^Rn
progeny
Average annual radon proge-
ny concentration (including
background)
0.03 WL
(DOE 1990)
5
Table 2. Results of ORNL analysis of Geotech soil samples
from 316 South 1st East Street, Monticello Utah (MS00062)
'Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No.* (cm)
XI MNK-475 >15 2.0 2.1
X2 MNQ-905 >15 1.3 1.3
X3 MNQ-906 >15 1.7 1.7
X4 MNQ-907 >15 2.6 2.5
X5 MNQ-908 >15 2.8 2.7
" An X-type sample is a split of the sample taken by the remedial action contractor.
* Soil samples representative of the bottom 15-cm (6-in.) soil layers of the excavated
areas were taken by Geotech, and these samples were blended to form a composite
soil sample, which represents an average over one of the verification areas.
6
REFERENCES
Abramiuk I. N.et al.1989. Monticello Remeaial Action Project Site Analysis Report,
GJ-10, prepared by Bendix Field Engineering Corporation, Grand Junction,
Colorado, for the U.S. Department of Energy, Surplus Facilities Management
Program, Richland, Washington.
Geotech 1993, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00062, Address: 316 South 1st East Street, Monticello,
Utah 84535, Geotech, Grand Junction, Colorado, Feburary 1993.
U.S. DOE 1990. Verification and Certification Protocol for the Office of
Environmental Restoration, Formerly Utilized Sites Remedial Action Programs and
Decontamination and Decommissioning Program, Revision 3, November 1990. U.S.
Department of Energy, Washington, D.C.
ORNL, 1992. Pollutant Assessments Group Procedures Manual. ORNL/TM-
6645/RI Oak Ridge National Laboratory, Grand Junction, Colorado.