DERR-1997-012496 - 0901a06880543f6d

DOE ID No.: MS-00245-VL
Property Address: Parcel No. A000000D003A, South Third East Street
Vicinity Property Certification Summary and Recommendation
Summary Evaluation
Certification Criteria MACTEC-ERS
U.S. Department
of Energy (DOE)
Ra-226 is s 5 pCi/g above
background in top 15-cm-thick layer
of soil, averaged over 100 m2.
In situ [X] Lab [ ]
Ra-226 is ^ 15 pCi/g above
background in any 15-cm-thick layer
of soil more than 15 cm below the
surface, averaged over 100 m2.
In situ [ ]Lab[X]
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 WL or, at
most, 0.03 WL.
Supplemental standards were applied
in accordance with EPA standard
40 CFR 192.21.
Hot spot criteria met as outlined by
DOE guidelines for FUSRAP (Rev.2,
March 1987).
Yes No Not Taken Yes No Not Taken
[X]' [ ]
IX] [ ]
[ ] [ ]
[ ] [ ]
I ] [X]
[X] [ ]
[ ]
[ ]
[X]b
[X]b
[ ]
[ ]
M [ ]
[X] [ ]
[ ] [ ]
[ ] [ ]
[ ] [y]
[Y] [ ]
[ ]
[ ]
[Xl
[M
[ 1
[ 1
"The excavations were backfilled with materials that were measured at the source indicating 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.
"Vacant lot.
1 of 2
SCANNED
„„„ - iqq? - 0124^
DOE ID No.: MS-O0245-VL
MACTEC-ERS Recommendation
On the basis of the Property Completion Report evaluation, this property is recommended for
[X] Certification by DOE.
[ ] Certification by DOE with the concurrence of the U.S. Nuclear Regulatory Commission
because supplemental standards were applied according to 40 CFR 192.21.
Manager, Monticello Program
MACTEC-ERS
DOE Evaluation
On the basis ofthe Property Completion Report recommendation, this property
] Should be certified by DOE.
[ ] Should be certified by DOE with the concurrence of the U.S. Nuclear Regulatory
Commission because supplemental standards were applied according to 40 CFR 192.21.
U.S. Department of Energy
Work performed under DOE Contract No. DE-AC 13-96GJ87335, Task Order No. 96-05.02.14
2 of 2
Monticello Vicinity Properties Project
Property Completion Report
for
Monticello
Vicinity Property Remedial Action
for
DOE ID No.: MS-00245-VL
Address: Parcel No. A000OO0DOO3A,
South Third East Street
Monticello, Utah 84535
April 1997
Prepared for
U.S. Department of Energy
Albuquerque Operations Office
Grand Junction Office
Prepared by
MACTEC-Environmental Restoration Services, LLC (MACTEC-ERS)*
Grand Junction, Colorado
Michael C. Butherus
Manager, Monticello Program
Work performed under DOE Contract No. DE-AC13-96GJ87335
Task Order No. 96-05.02.14
*MACTEC-ERS has been granted authorization to conduct remedial action by the U.S. Department of Energy.
Remedial action was performed 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, Subpart B; and "Implementation," in 40 CFR 192, Subpart C, and the U.S. Department of
Energy Formerly Utilized Sites Remedial Action Program hot spot criteria.
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
i
4.0 APPENDIX t 6
DOE ID NO.: MS-00245-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
DOE ID NO.: MS-O0245-VL
Summary of Remedial Action
DOE ID No.:
Legal Description:
MS-00245-VL
Beginning at a point 112.7 feet south of the NW corner of Block D, Monticello
Townsite Survey, south 140.2 feet, east 172 feet, south 89.1 feet, east
42.5 feet, north 222 feet, west 14.5 feet, north 20 feet, west 200 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:
Parcel No. A000000D003A
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 18, 1992
October 28, 1992
Interior:
Exterior:
0 cubic yards
731 cubic yards
2,598 square meters (m2)
Property Completion Report
Submitted: September 1993
DOE ID NO.: MS-00245-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 731 cubic yards of residual radioactive material, ranging
from 7 inches to 16 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-00245-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 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 U/R/h)
to 20 pR/h (Appendix Figure 2.1). The results of analyses for
radium-226 in 35 composite soil samples ranged from less than
1.0 picocurie per gram (pCi/g) to 5.7 pCi/g (Appendix Table 3.1).
The composite sample representing Area V-34 included soil
samples taken from MS-00244-RS (Area V-10).
A
DOE ID NO.: MS-00245-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. A000000D003A, 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.
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 5.7 pCi/g.
*The background radium-226 concentration is approximately 2.0 pCi/g.
DOE ID NO.: MS-00245-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:08-13-93
MS-00245.VL WP51
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00245-VL
Address: Parcel No. A000000D003A, South Third East Street, Monticello, Utah
A less-than sign (<) indicates that the minimum detection limit based on Compton
background was reached.
Exposure-Rate Soil Sample Meas. Radium-226
Area Range Ct/R/h) Ticket No. Method* (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
V-27
V-28
15
15
15
15
15
15
14
15
15
16
14
15'
16
17
15
13
14
14
14
14
15
15
15
14
14
14
15
15
19
19
18
18
17
17
19
18
18
18
16
17
19
19
17
15
16
16
16
16
17
18
18
16
15
17
16
20
NAT 331
NAT 332
NAT 333
NAP 200
NAP 201
NAP 202
NAP 203
NAP 204
NAP 205
NAP 206
NAP 207
NAP 208
NAP 209
NAP 210
NAV 970
NAV 971
NAV 972
NAV 973
NAV 974
NAV 975
NAV '976
NAV 977
NAV 978
NAV 979
NAV 980
NAV 981
NAV 982
NAV 983
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
3.4
4.0
2.6
2.6
3.1
3.8
2.4
1.6
2.9
1.8
1.4
1.0
2.6
3.5
2.6
1.0
1.5
1.4
3.0
1.5
2.1
5.7
2.5
1.5
2.1
1.5
2.7
2.1
*OCS = Opposed Crystal System
7
Table 3.1 (continued)
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00245-VL
Address: Parcel No. A000000D003A, South Third East Street, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range (//R/h) Ticket No. Method* (pCi/g)
V-29 15-19 NAV 984 OCS 2.1
V-30 15 - 19 NAV 985 OCS 3.3
V-31 15 - 17 NAV 986 OCS 1.7
V-32 15-18 NAV 987 OCS 2.3
V-33 15-16 NAA 755 OCS 1.9
V-34t 15 - 19 NAS 519 OCS 2.9
V-35 15 - 19 NAS 524 OCS 2.2
See Appendix Figure 2.1 for the verification areas.
*OCS = Opposed Crystal System
TThe composite sample included soil samples taken from MS-00244-RS.
a
10
42
12
i r
14
~i—r
16 18 20 22 24
T—i—r 1 T
26 28 30
i—T
32
~T~
34 36 38 40 42 44 46
T—I—r
48 50
i—r I r i r "i—i—r
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
c/i <
01
o
in
9
13 V-33 V-30 V-31 16 V-29 19-16 V-32 15-19 15-17 15-19 15-18 6 V-28
15-20
1 10 12 V i. 13-16
V-21 0 10 14-16 0 . . . V-27 V-23
15-16 15-18 V-26 V-25
.<•>.•
0 /. . . . r^. . . 14-15 14-17 <2>"-V-22 /. . . 15-18
/ • •
•i i
0 V-17 V-15 V-16 V-21 ^j-<£)®0 V-20 V-1B
5-17 13-15 14-16 0 V-19 15-17 14-16 14-16
14-16
•••m. 0
0V.<6> 0 V-12 V-l I
.0 15-17 14-16
0 V-9 V-B — S V-10
15-16 15-18 V-14 0 16-18 V-13
0 7-19
16-19
0 0 0 0 0
.<•>.••
0 V-6 0 V-3 V-4 V-5
0 15-17 14-19 15-18 15-16 15-17
t V-2 v-l
15-19 15-19
V-34
13-19
13-16
SHED
13/iR/h Flo
..J 5
V-35
13-19
L
RM0024SV 0f/t5/*J RTS/242
SCALE IN FEET
NORTH
10
X
J L J I I L
20 10 0
J L
20
J L
40
IHIS DRAWING. PREPARED FOR THE ENVIRONMENTAL RESTORATION
PROCRAM. 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 REUCO UPON FOR THE ESTABLISHMENT OF
FENCE. BUILDING. OR OTHER FUTURE IMPROVEMENT LINES.
<D
nv.vi
(V.YJ
12-15
V-l
16-17
LECENP
ALL OEPTHS IN INCHES
ALL EXPOSURE RATES IN pR/h
ASSESSEO 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
RADIOLOGICAL AS-BUILT
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
J I L J I I J L
U.S. DEPARTMENT OF ENERGY
KB PARCEL NO. A00O00ODO03A
SOUTH THIRD EAST STREET
MONTICELLO. UTAH
4C
3B
36
34
32
30
28
26
24
22
20
18
16
14
12
GBOIKM INC.
»«••» MS-00245-VL
-*••» 3-C00243-V1 ..1,1 10
10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS. INC.
GRANO JUNCTION OFFICE
P. O. BOX 2567
GRAND JUNCTION. COLORADO 81502
m 2 s m,
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
MS00245 ;
A000000D0Q3A. South 3rd East Street
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
AO00O00DO03A, SOUTH 3RD EAST STREET
MONTICELLO, UTAH (MS00245)
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
VERIHCATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
CONCLUSION 3
REFERENCES 6
iii
UST OF TABLES
1 Applicable guidelines for protection against radiation 4
2 Results of ORNL analysis of Geotech soil samples from AW0000D0O3A, South 3rd
East Street, Monticello, Utah (MS00245) 5
v
ACKNOWI^lX5MENTS
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 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 contaiiiing 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
A000000D003A, 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 A(X)0000D003A, SOUTH 3RD EAST STREET
MONTICELLO, UTAH (MS00245)*
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 A00O00ODO03A, 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
A0O0tXX)DO03A, 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 inches
deep. However, during the actual removal process, a total of 731 yd3 of contaminated
earth and uranium mill tailings, 7 to 16 inches deep were removed from a 2,598 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 35 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.
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 35 excavated areas for this
property. Geotech's analysis of these samples showed ^Ra concentrations from < 1.0 to
5.7 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
1.1 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 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 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 A00O000DO03A, South 3rd East Street, Monticello Utah (MS00245)
^Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No* (cm)
X16 NAV 971 >15 1.1 1.0
X23 NAV 973 >15 2.0 2.5
X31 NAV 986 >15 1.7 1.7
" 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 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: MS00245, Address: A000000D003A, 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-00248-CS
Property Address: 317 East Center Street
Vicinity Property Certification Summary and Recommendation
Summary Evaluation
Certification Criteria MACTEC-ERS
U.S. Department
of Energy (DOE)
Ra-226 is _ 5 pCi/g above
background in top 15-cm-thick layer
of soil, averaged over 100 m2.
In situ [X] Lab [ ]
Ra-226 is _ 15 pCi/g above
background in any 15-cm-thick layer
of soil more than 15 cm below the
surface, averaged over 100 m2.
In situ [ ]Lab[X]
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 WL or, at
most, 0.03 WL.
Supplemental standards were applied
in accordance with EPA standard
40 CFR 192.21.
Hot spot criteria met as outlined by
DOE guidelines for FUSRAP (Rev.2,
March 1987).
Yes No Not Taken Yes No Not Taken
[XT [ ]
[X] [ ]
[X] [ ]
[ ] [ ]
[ ] [X]
[X] [ ]
[ ]
[ ]
[ ]
[X]"
[ ]
[ ]
[Xj [ ]
IX] t ]
LX] [ ]
[ ] [ ]
[ ] [X]
[ ]
[ ]
[ ]
[X]
[ ]
IX] [ ] [ ]
"The excavations were backfilled with materials that were measured at the source indicating 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.
"Excessive ventilation caused by missing windows.
1 of 2
DOE ID No.: MS-00248-CS
MACTEC-ERS Recommendation
On the basis of the Property Completion Report evaluation, this property is recommended for
pq Certification by DOE.
[ ] Certification by DOE with the concurrence of the U.S. Nuclear Regulatory Commission
because supplemental standards were applied according to 40 CFR 192.21.
Manager, Monticello Program
MACTEC-ERS
DOE Evaluation
On the basis ofthe Property Completion Report recommendation, this property
[>0 Should be certified by DOE.
[ ] Should be certified by DOE with the concurrence of the U.S. Nuclear Regulatory
Commission because supplemental standards were applied according to 40 CFR 192.21.
Michael C. Butherus
Date
U.S. Dep^artment of Energy
Work performed under DOE Contract No. DE-AC13-96GJ87335, Task Order No. 96-05.02.14
2 of 2
Monticello Vicinity Properties Project
Property Completion Report
for
Monticello
Vicinity Property Remedial Action
for
DOE ID No.: MS-00248-CS
Address: 317 East Center Street
Monticello, Utah 84535
April 1997
Prepared for
U.S. Department of Energy
Albuquerque Operations Office
Grand Junction Office
Prepared by
MACTEC-Environmental Restoration Services, LLC (MACTEC-ERS)*
Gpafid Junction, Colorado
Michael C. Butherus
Manager, Monticello Program
Work performed under DOE Contract No. DE-AC13-96GJ87335
Task Order No. 96-05.02.14
*MACTEC-ERS has been granted authorization to conduct remedial action by the U.S. Department of Energy.
Remedial action was performed 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, Subpart B; and "Implementation," in 40 CFR 192, Subpart C, and the U.S. Department of
Energy Formerly Utilized Sites Remedial Action Program hot spot criteria.
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
SUMMARY
DOE ID No.: MS-00248-CS
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was established to reduce
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 U.S. Department of Energy (DOE) 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. Cleanup activities also were conducted to meet the hot spot
criteria established by radiological protection guidelines in the DOE
"Guidelines for Residual Radioactive Material at Formerly Utilized Sites
Remedial Action Program and Remote Surplus Facilities Management
Program Sites" (Revision 2, March 1987).
This property was evaluated on the basis of EPA standards and DOE hot
spot criteria by the DOE Remedial Action Contractor. DOE reviewed these
evaluation results and determined that the property contained mill tailings
(residual radioactive material) exceeding DOE hot spot criteria. The
Remedial Action Contractor was notified of the inclusion of this property
into the MVP Project and was authorized by DOE to conduct remedial
action as required to bring the property into conformance with EPA
standards and DOE hot spot criteria.
1
DOE ID No.: MS-00248-CS
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:
MS-00248-CS
Location No. M-232; beginning 14.8 feet
north and 6.1 feet west of the SE corner of
Section 25, T33S., R23E., Salt Lake Base
Meridian; west 130 feet, south 14.8 feet,
west 20 feet, north 42 feet, east 20 feet,
north 182.8 feet, east 130 feet, south
210 feet to beginning, City of Monticello,
County of San Juan, State of Utah
317 East Center Street
Monticello, Utah 84535

Commercial Structure (CS)
Not applicable: inclusion requested by the
Remedial Action Contractor
July 1, 1992
Rust Geotecri
March 4, 1993
Diamond Back Services, Inc.
9861 Titan Park Circle
Littleton, Colorado
July 7, 1994
August 31, 1994
Interior: 0 cubic yards
Exterior: 65 cubic yards
316 square meters (ma)
February 1996
2
DOE ID No.: MS-00248-CS
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 quantity of contamination for this property was
not specified because it was assessed as part of Block MS-09031-BK.
The remedial action process included the removal of approximately
65 cubic yards of residual radioactive material, ranging from 6 to
24 inches deep.
The differences jn 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-00248-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 the Remedial Action
Contractor during August 1991, as described in the final REA
dated March 1993. 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).
Additionally, a composite soil sample was collected in~an
unremediated area where gamma exposure-rates exceeded
17 microroentgens per hour (jvR/h), which is 30 percent greater
than background (13 //R/h).
Exterior Findings: Surface exposure-rate values, determined during
the gamma scan, ranged from 13 to 19//R/h, as indicated on
Appendix Figure 2.1. The results of analyses for radium-226 in
five composite soil samples ranged from 1.6 to 4.1 picocuries per
gram (pCi/g), as indicated in Appendix Table 3.1. The soil sample
result for radium-226 in the unremediated area with elevated
exposure rates was 5.0 pCi/g (Appendix Table 3.2).
3.1.3 Radon Decay-Product Concentration (RDC) Measurement
RDC measurements were not taken in the building due to
excessive ventilation caused by missing windows.
4
DOE ID No.: MS-00248-CS
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by EPA standards (40 CFR 192.12, 192.20-23) and
DOE hot spot criteria, as indicated in the Certification Data Summary
below.
Therefore, the property located at 317 East Center Street, in
Monticello, Utah, is recommended for certification as required by DOE
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 11 to 14 //R/h.
Not taken due to
excessive ventilation.
l_n_.
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 mJ.
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 mJ.
Soil sample result was
5.0 pCi/g.**
Soil sample results
ranged from 1.6 to
4.1 pCi/g.,#
•The background exposure rate is approximately 13 //R/h.
The background radium-226 concentration is approximately 2.0 pCi/g.
**The hot spot criteria were met based on gamma scans and/or soil sample results.
5
DOE ID No.: MS-00248-CS
4.0 APPENDIX
Appendix Tables:
Table 3.1 Post-Excavation Sample/Measurement Results
Table 3.2 Radium Measurement Results for an Unremediated Area
with Elevated Gamma Exposure Rates
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
JEK: 11-06-95
MS-00248.CS WP61
REV080195
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00248-CS
Address: 317 East Center Street, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range (//R/h) Ticket No. Method* (pCi/g)
V-1 15-18 NCF387 OCS 4.1
V-2 14-18 NCF388 OCS 2.7
V-3 14-17 NCF389 OCS _.1.6
V-4 15-17 NCF390 OCS 1.6
V-5 15-17 NCF391 OCS 2.7
See Appendix Figure 2.1 for the verification areas.
"OCS = Opposed Crystal System
7
Table 3.2
Radium Measurement Results for an Unremediated Area
with Elevated Gamma Exposure Rates
DOE ID No.: MS-00248-CS
Address: 317 East Center Street, Monticello, Utah
Meas.
Loc. Grid Meas. Depth Radium-226
Coord. Method" (inches) (pCi/g)
190397 OCS 00-06 5.0
•OCS = Opposed Crystal System
8
42
40
33
36
34
32
30
28
26
24
22
20
IS
16
14
12
10
1
) 12 14 16 18
i—i i—i—i—i—i—r
20 22 24 26
"T"
28 30 32 34 36 38 40 42 46 48
I I I I
r_ 16-19
z V-J V-i V-5
15-17
E v-2 13-16 14-16
V-2
14-U
V-l
15-18
6 /.
<5>
V-2
11-18 10 ONE STORY
FRAME BLOC w 11-14
A X 6
J r
J 13-16
©
(-.-,
Lv.vj
12-15
l_2j
V-1
16-17
LEGEND
ALL OEPTHS IN INCHES
ALL EXPOSURE RATES IN jtR/h
ASSESSEO AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSEO CONTAMINATION
POST-REMEDIAL ACTION EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION
AVERAGE EXCAVATED OEPTH FOR THE DEPOSIT OF
CONTAMINATION
ASSESSEO CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
VERIFICATION SOIL SAMPLE AREA IOENTIFIER
ANO EXCAVATION EXPOSURE-RATE RANGE
I I
L
SCALE IN FEET
20 10 0 20 40
I I I I I I I L
EAST CENTER STREET (U.S. HIGHWAY 666)
NORTH
I I J J I L
THIS OKAWINC is ro* THC SOLC use or THC U.S. OCPMTUCNT
Or CNCRST ANO ITS CONHtACTOPS. IT IS HOT A LAHO SUftVCT
PLAT. gTlUTT LOCATION PlAT. 0* OTHC* lUPHOVCUCNT SUPVPT
PLAT AHO IS NOT TO K RCLlCO UPON fOK TMC CSTAKISHUCNT
or rCNCC. OUILDINC. OP OTHCR rutunf. UIPPOVEUCNT LINES
RADIOLOGICAL AS-BUILT
nQURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
U.S. OEPARTUENT OF ENERGY
wm ****** Mojcctt of na. co>.o*'00
w
317 EAST CENTER STREET
MONTICELLO. UTAH
RUSTIC ««•« US-00248-CS
12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 46 48 5(
OAK RIOGE NATIONAL LABORATORY
MANAGED BY LOCKHEED MARTIN ENERGY RESEARCH CORPORATION
FOR THE U.S. DEPARTMENT OF ENERGY
POST OFFICE BOX 25*7
GRANO JUNCTION. COLORADO 81502
PHONE: [phone]
FAX [phone]
MAR 29 1998
Ms. Mary Ann Rondinella
Project Coordinator, Monticello Projects
U.S. Department of Energy
P. O. Box 2567
Grand Junction, Colorado 81502
Dear Ms. Rondinella: ,
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 isjbased on an independent verification review ofthe
Remedial Action Contractor's completion report and field verification.
This recommendation is based upon the Independent Verification Contractor's assessment ofthe
~6Ra concentration in the soil and indoor gamma exposure rate at this property.
Therefore, this property is recommended for certification .by t$*e U.S. Department of Energy.
Sincerely,
A
Gretchen A. Pierce
MVP/IVC Project Manager
Environmental Assessment Group
Location Number:
Location Address:
MS00248-CS
317 East Center Street
Monticello. Utah 84535
Property Owner:
Owner Address:

Monticello. Utah 84535
Tenant Name: V acant
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
317 EAST CENTER STREET
MONTICELLO, UTAH (MS00248-CS)
A. R. Jones
March 1996
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
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 v
LIST OF FIGURES v
ACKNOWLEDGMENTS vii
ABSTRACT viii
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 Measurement Results 3
ORNL SURVEY RESULTS 6
Gamma Measurements 6
Soil Sample Analysis 6
CONCLUSION 6
REFERENCES 8
ii
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 M. K. Jensen for analysis of soil samples and technical review and J. R.
Sauvage for technical review.
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 1994, RUST
Geotech Inc., the remedial action contractor designated by DOE, performed remedial
action on the vicinity property at 317 East 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 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).
viii
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT 317 EAST CENTER STREET
MONTICELLO, UTAH (MS00248-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
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 contamndnation. 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 (U.S. DOE 1990b).
The verification of remedial action was performed by members of the 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 Corp.
2
During 1994, 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, an abandoned building located at 317 East 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 1996). When the excavation stage was
completed, the property was resurveyed, including soil sampling, by Geotech and by an
independent contractor. Data was verified to support 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 317 East 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
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 1990a).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1996)
indicates the property was remediated as 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.
This property was assessed as part of Block 31, therefore, the quantity of material
assessed is not available. During the actual removal process, a total of 65 yd3 of
contaminated earth and uranium mill tailings, 6 to 24 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 at ground-
level, a sur-face 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.
GEOTECH SURVEY RESULTS
Gamma Measurements
Gamma exposure rate measurements taken by Geotech over the ground-level ofthe
structure ranged from 11 to 14 /zR/h. Exterior surface gamma measurements taken from
the excavated areas prior to backfilling ranged from 14 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. These samples were blended to form a
composite soil sample representative of an average over the five exterior verification
areas. Geotech's analysis of these samples showed ^Ra concentrations ranging from 1.6
to 4.1 pCi/g in the composite sample. ORNL ETS obtained a percentage of these soil
samples and performed a confirmatory analysis, which showed ^Ra concentrations to
range from 1.2 to 3.2 pCi/g, These values are below the EPA standard value of 15 pCi/g
for soil layers >15 cm below the surface (Table 1). Gamma ranges and/or soil sample
results demonstrate compliance to the DOE Hot Spot Guideline for areas < 25 m2
(Table 1). Results of Geotech and ORNL soil sample analyses are given in Table 2.
Additionally, a revisit to the property (January 22, 1996) investigated an area north of V2,
V3, and V4. Gamma exposure rates in this area were 16-19 uR/h and a surface excava-
tion control sample taken during remedial action had a r<Ra concentration of 8.8 pCi/g.
A composite sample was taken from this area and the ^Ra concentration was 5.0 pCi/g.
This sample does not exceed the EPA standard value of 5 pCi/g above background
averaged over 100 m2 for surface soil layers (Table 1).
Radon Measurement Results
The structure on this property is uninhabitable, therefore, radon decay-product
concentration (RDC) measurements were not taken.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible
concentration 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
averaged over 15-cm-thick
soil layers more than 15 cm
below the surface
Radionuclide con-
centrations in soil for
Hot Spot areas
Maximum permissible con-
centration of 226Ra in soil
above background level, for
areas less than 25 nr
Ra-26 concentration, in any
surface or subsurface area
less than 25 m2, is below the
guideline of (lOO/A)*,
where A is the area of the
elevated region
Exposure to 2~Rn
progeny
Average annual radon proge-
ny concentration (including
background)
0.03 WL
(DOE 1990a)
5
Table 2. Results of ORNL and Geotech analyses of soil samples
from 317 East Center Street, Monticello, Utah (MS00248-CS)
33Ra concentration fpCi/g^
ORNL Geotech
sample sample Depth
No." No* (cm) Confirmatory' ORNLrf Geotech
VIC >15 3.8
VIH >15 4.4
XI NCF387 >15 3.2 4.1
X3 NCF389 >15 1.8 1.6
X5 NCF391 >15 1.2 2.7
" An X-type sample is at split of the sample taken by the remedial action contractor.
* Soil samples representative of the bottom 15-cm (6-in.) soil layers ofthe 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.
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 19 uR/h (Figure 1).
Soil Sample Analysis
ORNL sampled one 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 a composite soil sample representative of an average over the
exterior verification area. ORNL's analysis of this composite sample showed a 226Ra
concentration of 3.8 pCi/g. This value is below the DOE guideline value of 15 pCl/g for
soil layers >15 cm below the surface (Table 1). ORNL also collected an individual soil
sample at the location of the highest gamma exposure rate to verify compliance with the
DOE Hotspot Guideline in this area. ORNL's analysis of this sample showed a 226Ra
concentration of 4.4 pCi/g. 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.
8
REFERENCES
Geotech 1996, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00248-CS, Address: 317 East Center Street, Monticello,
Utah 84535, Geotech, Grand Junction, Colorado, February, 1996.
ORNL, 1993. Environmental Technology Section (Formerly Pollutant Assessments
Group) Procedures Manual. ORNL 6645/R2 Oak Ridge National Laboratory, Grand
Junction, Colorado, September, 1993.
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. '
1
DOE ID No.: MS-O0271-CS
Property Address: 17 North Main Street
Vicinity Property Certification Summary and Recommendation
Summary Evaluation
Certification Criteria MACTEC-ERS
U.S. Department
of Energy (DOE)
Ra-226 is £ 5 pCi/g above
background in top 15-cm-thick layer of
soil, averaged over 100 m2
In situ [X] Lab [ ]
Ra-226 is ^ 15 pCi/g above
background in any 15-cm-thick 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 WL or, at
most, 0.03 WL.
Supplemental standards were applied
in accordance with EPA standard
40 CFR 192.21.
Hot spot criteria met as outlined by
DOE guidelines for FUSRAP (Rev.2,
March 1987)
Yes No Not Taken Yes No Not Taken
[X]a [ ]
[ ] [ ]
[X] [ ]
[X] [ ]
[ 1 [X]
[X] [ ]
[ ]
[X]a
[ ]
[ ]
[ ]
[ ]
M [ 1
[ ] [ ]
[» [ ]
M [ ]
M [ ]
[ 1
[ ]
[ ]
[ ]
[ ]
Exterior areas were verified on the basis of surface gamma exposure rates that do not exceed 30 percent above
normal background.
Hlllllllllll millllllllll
SFCERTIFED SFMS-00271
1 of 2
DOE ID No.: MS-00271-CS
MACTEC-ERS Recommendation
On the basis of the Property Completion Report evaluation, this property is recommended for
[X] Certification by DOE.
[ ] Certification by DOE with the concurrence of the U.S. Nuclear Regulatory Commission
because supplemental standards were applied according to 40 CFR 192.21.
Manager, Monticello Programs
MACTEC-ERS
DOE Evaluation
On the basis of the Property Completion Report recommendation, this property
[ Should be certified by DOE.
[ ] Should be certified by DOE with the concurrence of the U.S. Nuclear Regulatory
Commission because supplemental standards were applied according to 40 CFR 192.21.
Date
Date
U.S. Department of Energy
Work performed under DOE Contract No. DE-AC 13-96GJ87335, Task Order No. 96-05.02.14
2 Of 2
Monticello Vicinity Properties Project
Property Completion Report
for
Monticello
Vicinity Property Remedial Action
for
DOE ID No.: MS-00271-CS
Address: 17 North Main Street
Monticello, Utah 84535
February 1997
Prepared for
U.S. Department of Energy
Albuquerque Operations Office
Grand Junction Office
Prepared by
MACTEC-Environmental Restoration Services, LLC (MACTEC-ERS)*
Grand Junction, Colorado
Michael C. Butherus
Manager, Monticello Programs
Work performed under DOE Contract No. DE-AC 13-96GJ87335
Task Order No. 96-05.02.14
*MACTEC-ERS has been granted authorization to conduct remedial action by the U.S. Department of Energy.
Remedial action was performed in accordance with the U.S. Environmental Protection Agency "Standards for
Cleanup ot Land and Buildings Contaminated with Residual Radioactive Materials from Inactive Uranium Processing
Sites," 40 CFR 192, Subpart B; and "Implementation," in 40 CFR 192, Subpart C, and the U.S. Department of
Energy Formerly Utilized Sites Remedial Action Program hot spot criteria.
DOE ID No.: MS-00271-CS
Contents
Page
1.0 Summary 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Remedial Action Surnmary 2
2.0 Operations Summary 3
2.1 Remedial Action Plan 3
2.2 Assessed and Remediated Contamination 3
3.0 Verification Summary 4
3.1 Radiological Survey Data 4
3.1.1 Preremedial Action Survey 4
3.1.2 Postexcavation Survey 4
3.1.3 Radon Decay-Product Concentration Measurements 4
3.2 Recommendation for Certification 5
Table
Table 1. Certification Data Summary 5
Appendix
Appendix A. Radiological Conditions A-1
DOE/Grand Junction Office
February 1997
MVP Property Completion Report
Page ii
DOE ID No.: MS-00271-CS
1.0 Summary
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was established to reduce the potential hazard
to the public due to long-term exposure to low-level radioactivity associated with the off-site 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 process both uranium and
vanadium ore. 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 U.S. Department of Energy (DOE) 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. Cleanup
activities also were conducted to meet the hot spot criteria established by radiological protection
guidelines in the DOE Guidelines for Residual Radioactive Material at Formerly Utilized Sites
Remedial Action Program and Remote Surplus Facilities Management Program Sites
(Revision 2, March 1987).
This property was evaluated on the basis of EPA standards and DOE hot spot criteria and
determined to contain mill tailings (radioactive material) exceeding EPA standards and/or DOE
hot spot criteria. The Remedial Action Contractor* was notified of the inclusion of this property
into the MVP Project and was authorized by DOE to conduct remedial action as required to bring
the property into conformance wit,h EPA standards and DOE hot spot criteria.
The Remedial Action Contractor, MACTEC-ERS, was awarded the U.S. Department of Energy Grand Junction
Office (DOE-GJO) Technical Assistance and Remediation contract and commenced work on September 5, 1996.
The MACTEC-ERS team consists of International Technology Corporation, Science Application International
Corporation, Roy F. Weston, Inc., and Rust Federal Services, Inc. Rust Geotech was the DOE-GJO contractor from
October 1, 1986, through September 4, 1996, and implemented some of the tasks discussed in this report.
DOE/Grand Junction Office
February 1997
MVP Property Completion Report
Page 1
DOE ID No.: MS-00271-CS
1.3 Remedial Action Summary
DOE ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological and Engineering Assessment (REA):
Construction Subcontractor:
Preconstruction Conference Record:
Notice of Final Completion Inspection:
Volume of Material Removed in Cubic Yards (yd3):
Area Cleaned Up in Square Meters (m2):
Property Completion Report Submitted:
MS-O0271-CS
Lot 1, Block J, Monticello Townsite
Survey, County of San Juan, State of
Utah
17 North Main Street
Monticello, Utah 84535

Commercial Structure (CS)
Oak Ridge National Laboratory
Grand Junction Office
November 6, 1992
MACTEC-ERS
July 25, 1994
Diamond Back Services, Inc.
April 12, 1995
July 17,1995
Exterior: 0
Interior: 5
3
February 1997
DOE/Grand Junction Office
February 1997
MVP Property Completion Report
Page 2
DOE ID No.: MS-00271-CS
2.0 Operations Summary
2.1 Remedial Action Plan
The remedial action plan specified removal of radioactive material. Once excavation was
completed, the affected area was resurveyed for possible remaining 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 before remedial action
activities.
2.2 Assessed and Remediated Contamination
The radiological assessment identified 5 yd3 of contamination, 96 inches (in.) high, within the
property boundary. The remedial action process included removal of approximately 5 yd3 of
radioactive material, 96 in. high. The area of assessed and excavated contamination is shown on
Figure A-1.
DOE/Grand Junction Office
February' 1997
MVP Property Completion Report
Page 3
DOE ID No.: MS-00271-CS
3.0 Verification Summary
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Preremedial Action Survey
The Remedial Action Contractor conducted radiological surveys during July and
November 1993, as described in the final REA. Figure A-1 shows the extent of assessed
contamination and identifies the area recommended for remedial action.
3.1.2 Postexcavation Survey
A scintillometer was used to perform a surface gamma scan after the removal of radioactive
material and before backfilling. The results of the gamma scan are presented in Table A-1.
3.1.3 Radon Decay-Product Concentration Measurements
Radon decay-product concentration (RDC) measurements were taken on the lowest habitable
level of each building, as shown on Figure A-1. The measurement results are presented in
Table A-2.
DOE/Grand Junction Office
February 1997
MVP Property Completion Report
Page 4
DOE ID No.: MS-O0271-CS
3.2 Recommendation for Certification
Radioactive materials have been removed from this property to the extent required by EPA
standards (40 CFR 192, Subparts B and C) and DOE hot spot criteria, as indicated in the
Certification Data Summary (Table 1). Therefore, the property located at 17 North Main Street,
in Monticello, Utah, is recommended for certification as required by DOE guidelines.
Table 1. Certification Data Summary
Applicability Standard Survey Results
Radium-226
Concentration in
Surface Soil
Radium-226
Concentration in
Subsurface Soil
Exposure Rate
Radon Decay-
Product
Concentration
Land
Shall not exceed 5 pCi/g above
background" in the 15-cm-thick
surface layer, averaged over
100 m2.
Shall not exceed 15 pCi/g
above background3 in any
15-cm-thick soil layer more
than 15 cm below the surface,
averaged over 100 m2.
< 5 pCi/g above background on the
basis of gamma exposure rates that do
not exceed 30 percent above normal
background.6
< 15 pCi/g above background on the
basis of surface gamma exposure
rates that do not exceed 30 percent
above normal background."
Habitable Structures
Shall not exceed 20 uR/h
above background.0
Annual average shall not
exceed 0.02 WL, to the extent
practicable, and shall in no
case exceed 0.03 WL.
Ranges were 13 to 15 uR/h for the
remediated portion and 10 to 16 uR/h
for the remainder of the ground floor of
Building 1. Range for the ground floor
of Building 2 was 11 to 14 uR/h.
Averages were 0.0039 WL for
Building 1 and 0.0029 WL for
Building 2, on the basis of the DOE-
approved abbreviated-measurement
method.
Key: cm = centimeters; m2 = square meters; pCi/g = picocuries per gram; uR/h = microroentgens per hour;
WL = working level
aThe background radium-226 concentration for Monticello Vicinity Properties is approximately 2.0 pCi/g.
'The hot spot criteria were met based on gamma scans and/or soil sample results.
°The background exposure rate for this property is approximately 14 uR/h.
DOE/Grand Junction Office
February 1997
MVP Property Completion Repon
Page 5
DOE ED No.: MS-00271-CS
Appendix A
Radiological Conditions
Table A-1. Postexcavation Survey Results
Table A-2. Radon Decay-Product Concentration Measurement Results
Figure A-1. Radiological As-Built
DOE ID No.: MS-00271-CS
Table A-1. Postexcavation Survey Results
Verification
Area"
Gamma
Exposure Rate
Range (uR/h)
Soil Sample
Ticket No.
Measurement
Method
Radium-226
Concentration
(pCi/g)
V-1 13-15 Not applicable
Key: pCi/g = picocuries per gram; uR/h = microroentgens per hour; V = verification area
aSee Figure A-1 for location of verification area.
DOE/Grand Junction Office
February 1997
MVP Property Completion Report
Page A-2
DOE ID No.: MS-00271-CS
Table A-2. Radon Decay-Product Concentration Measurement Results*
Detector"
Number Start Date End Date
Radon
Concentration
(PCi/L) WL
BUILDING 1
3973882
3973921
3973910
07-25-95
07-25-95
07-25-95
11-15-95
11-15-95
11-15-95
0.813
0.884
0.619
Average:
0.0041
0.0044
0.0031
0.0039
3973971
3973977
3973944
07-25-95
07-25-95
07-25-95
BUILDING 2
11-15-95
11-15-95
11-15-95
0.285
0.460
0.973
Average:
0.0014
0.0023
0.0049
0.0029
Key: pCi/L = picocuries per liter; WL = working level
aSee Figure A-1 for measurement locations,
herradex Radtrak Detector.
DOE/Grand Junction Office
February 1997
MVP Property Completion Report
Page A-3
42
40
38
36
34
32
30
28
26
24
22
20
18
16
1 4
12
10
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METAL BUILDING
BUILDING 1
SEE DETAIL A
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BUILDING 2
11-14
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DETAIL A
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ALL DEPTHS/HEIGHTS IN INCHES
ALL EXPOSURE RATES IN |iR/h
ASSESSED AREA IDENTIFIER
AREA OF ASSESSED CONTAMINATION
EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION
VERIFICATION AREA IDENTIFIER
RADON DECAY-PRODUCT CONCENTRATION
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20 40
THIS DRAWING 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
COUPLE noK "twi
17 NORTH MAIN STREET
MONTICELLO. UTAH
U.S. DEPARTMENT OF ENERGY
CRAftO JUNCTION OFFICE, CGLOftADO
MONTICELLO VICINITY PROPERTIES
FIGURE A-1
RADIOLOGICAL AS-BUILT
"M5-0027I-CS
*>AS-0i3-000»-RMCOI71V1 1 1
24 26 28 30 32 34 36 38 40 42 46 48
OAK RIDGE NATIONAL LABORATORY
MANAGED BY LOCKHEED MARTIN ENERGY RESEARCH CORPORATION
FOR THE U.S. DEPARTMENT OF ENERGY
PHONE: [phone]
FAX: [phone]
2597 BV* Road
GRAND JUNCTION, COLORADO 81503
UT ? 5W
Ms. Mary Ann Rondinella
Project Coordinator, Monticello Projects
U.S. Department of Energy
P. O. Box 2567
Grand Junction, Colorado 81502
Dear Ms. Rondinella:
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
exterior gamma exposure rates, indoor radon daughter concentration, and indoor gamma exposure
rates at this property.
This property is recommended for certification by the U.S. Department of Energy.
Sincerely,
Gretchen A. Pierce
MVP/IVC Project Manager
Environmental Assessment Group
MS00271-CS
17 North Main 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
17 NORTH MAIN STREET
MONTICELLO, UTAH (MS00271-CS)
A. R. Jones
March 1997
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81503
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
Radon Measurement Results 3
CONCLUSION 3
REFERENCES 5
iii
LIST OF TABLES
Applicable guidelines for protection against radiation
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 and M. T.
Muck 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 (DOE) 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
1995, the Remedial Action Contractor (RAC) designated by DOE, performed remedial action on the
vicinity property at 17 North 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
1
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT 17 NORTH MAIN STREET
MONTICELLO, UTAH (MS00271-CS)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the United States (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. Vana-
dium 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 de-
commissioning of government facilities that had been retired from service but still had radioactive
contaniination. 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 radio-
active 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 Proper-
ties (MVP) Project (US DOE 1990b).
•The verification of remedial action was performed by members of the Environmental Assessment Group in the Environmental
Technology Section ofthe Health Sciences Research Division at Oak Ridge National Laboratory under DOE contract DE-AC05-
960R22464 with Lockheed Martin Energy Research Corporation.
2
During 1995, the Remedial Action Contractor (RAC) designated by DOE, performed remedial
action on the vicinity property that is the subject of this report, a gas station and office building
located at 17 North Main Street, Monticello, Utah. The remedial action plan required removal of all
interior contamination. When the removal was completed, the property was resurveyed to ensure the
removal of all contamination and restored to a condition comparable to that which existed prior to
remedial action (MACTEC-ERS 1997).
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 Environ-
mental Technology Section (ETS) of Oak Ridge National Laboratory (ORNL) has been assigned the
responsibility of this task at the 17 North 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 (US DOE 1990a).
Document Reviews
Review of the RAC property completion report (MACTEC-ERS 1997) indicates the property
was remediated as evaluated by DOE on the basis of U.S. Environmental Protection Agency
standards and the DOE guidelines (US 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 the RAC identified 5 yd3 of contamination 96
inches high. During the actual removal process, a total of 5 yd3 of radioactive material, 96 inches
high, were removed from a 3 nr area.
The RAC performed a post-excavation survey prior to reconstruction. This survey consisted
of gamma scans with a scintillometer of the interior and exterior. Additionally, six in-situ delta
measurements were taken on the concrete at the base of the excavated walls to estimate the 226Ra
concentration. All delta measurements were <1 pCi/g.
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 radionu-
clide concentrations in soil samples. Applicable DOE guidelines for protection against radiation are
given in Table 1.
Gamma Measurements
Gamma exposure rate measurements taken by the RAC at the ground-level of Building 2 ranged
from 11 to 14 uR/h. Gamma exposure rates in the unaffected areas of Building 1 ranged from 10 to
16 uR/h, and 13 to 15 uR/h in the area of removal. Background exterior surface gamma measure-
ments ranged from 12 to 15 (iR/h.
Radon Measurement Results
Radon decay-product concentration (RDC) measurements for this site were determined by the
Alpha-track method. To monitor radon levels, the RAC placed three alpha-track detectors on the
ground floor of Buildings 1 and 2 located on this property for a period of approximately three months
(from July 25, 1995 to November 15, 1995). The average annual working levels (WLs) of radon
progeny concentration, as determined by the Tech./Ops-Landauer Corporation for Buildings 1 and
2, were 0.0039 and 0.0029, respectively, which are well below the 0.03-WL guideline given in Table
1.
CONCLUSION
Results of RAC radon daughter concentrations and gamma exposure rates show that radio-
nuclide concentrations are within applicable DOE guidelines. Based on the results of the post-
remedial-action data, which are confirmed by the verification assessment data, these radiological mea-
surements fall below the limits prescribed by DOE guidelines. It is concluded that the site success-
fully 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 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 averaged over 15-cm-thick soil
layers more than 15 cm below the
surface
Radionuclide con-
centrations in soil
for Hot Spot areas
Maximum Permissible con-
centration of Ra226 in soil
above background level,
for areas less than 25 m2
Ra226 concentrations, in any surface
or subsurface area less than 25 m2,
is below the guideline by a factor of
(100/A)'/2, where A is the area of the
elevated region
Exposure to 222Rn
progeny
Average annual radon
progeny concentration
(including background)
0.03 WL
(US DOE 1990a)
5
REFERENCES
MACTEC-ERS 1997. Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00271-CS, Address: 17 North Main Street, Monticello, Utah 84535,
MACTEC-Environmental Restoration Services, Grand Junction, Colorado, February 1997.
ORNL 1993. Environmental Technology Section (Formerly Pollutant Assessment Group)
Procedures Manual. ORNL 6645/R2, September 1993. Oak Ridge National Laboratory, Grand
Junction, Colorado.
US 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.
US 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.
f
DOE ID No.: MS-O0375-VL
Property Address: 254 South First East Street
Vicinity Property Certification Summary and Recommendation
Summary Evaluation
Certification Criteria MACTEC-ERS
U.S. Department
of Energy (DOE)
Ra-226 is <; 5 pCi/g above
background in top 15-cm-thick layer
of soil, averaged over 100 m2.
In situ [X] Lab [ ]
Ra-226 is s: 15 pCi/g above
background in any 15-cm-thick layer
of soil more than 15 cm below the
surface, averaged over 100 m2.
In situ [ ]Lab[X]
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 WL or, at
most, 0.03 WL.
Supplemental standards were applied
in accordance with EPA standard
40 CFR 192.21.
Hot spot criteria met as outlined by
DOE guidelines for FUSRAP (Rev.2,
March 1987).
Yes No Not Taken Yes No Not Taken
[X]" [ ]
[X] [ ]
[ ] [ ]
[ ] [ ]
[ 1 [X]
[X] [ ]
[ ]
[ ]
[X]b
[X]b
[ ]
[ ]
[X] [ ]
[ ] [ ]
[ ] [ ]
I 1 [X
IV] [ ]
[ ]
[M [ ] [ I
[xl
[>x]
[ 1
[ ]
The excavations were backfilled with materials that were measured at the source indicating 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.
'Vacant lot.
1 of 2
DOE ID No.: MS-00375-VL
MACTEC-ERS Recommendation
On the basis of the Property Completion Report evaluation, this property is recommended for
[X] Certification by DOE.
[ ] Certification by DOE with the concurrence of the U.S. Nuclear Regulatory Commission
because supplemental standards were applied according to 40 CFR 192.21.
Michael C. Butherus Date /
Manager, Monticello Program
MACTEC-ERS
DOE Evaluation
On the basis of the Property Completion Report recommendation, this property
pr] Should be certified by DOE.
[ ] Should be certified by DOE with the concurrence of the U.S. Nuclear Regulatory
Commission because supplemental standards were applied according to 40 CFR 192.21.
Cer#ficationH)fficial '1 Date
U.S. Department of Energy
Work performed under DOE Contract No. DE-AC 13-96GJ87335, Task Order No. 96-05.02.14
2 of 2
Monticello Vicinity Properties Project
Property Completion Report
for
Monticello
Vicinity Property Remedial Action
for
DOE ID No.: MS-00375-VL
Address: 254 South First East Street
Monticello, Utah 84535
April 1997
Prepared for
U.S. Department of Energy
Albuquerque Operations Office
Grand Junction Office
Prepared by
MACTEC-Environmental Restoration Services, LLC (MACTEC-ERS)*
id Junction, Colorado
v, —*
Michael C. Butherus
Manager, Monticello Program
Work performed under DOE Contract No. DE-AC13-96GJ87335
Task Order No. 96-05.02.14
*MACTEC-ERS has been granted authorization to conduct remedial action by the U.S. Department of Energy.
Remedial action was performed 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, Subpart B; and "Implementation," in 40 CFR 192, Subpart C, and the U.S. Department of
Energy Formerly Utilized Sites Remedial Action Program hot spot criteria.
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-00375-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
DOE ID NO.: MS-00375-VL
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
MS-00375-VL
Parcel No. M-103 - Beginning at the SE corner of Lot 4, Block 13, Monticello
Townsite Survey; north 82.5 feet, west 214.5 feet, south 82.5 feet, east
214.5 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:
254 South First East Street
Monticello, Utah 84535

Monticello, Utah 84535
Vacant Lot (VL)
Not applicable; inclusion requested by
the Remedial Action Contractor
May 2, 1991
RUST Geotech Inc.
July 16, 1991
Crowley Construction
East Route
Monticello, Utah
July 8, 1992
July 14, 1992
Interior:
Exterior:
0 cubic yards
3 cubic yards
24 square meters (m2)
September 1993
2
DOE ID NO.: MS-00375-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 cubic yard of contamination,
6 inches deep, within the property. The remedial action process included
the removal of approximately 3 cubic yards of residual radioactive
material, 4 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-00375-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
July 1990, as described in the final REA dated July 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 U/R/h)
to 16//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-00375-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 254 South First 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 standards Suryey Results
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall nbt 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.
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.
Not applicable:
vacant lot.
Not applicable:
vacant lot.
Soil sample result was
2.0 pCi/g.'
Soil sample result was
2.0 pCi/g.f
•The background radium-226 concentration is approximately 2.0 pCi/g.
TThe sample for V-1 represents both the surface and subsurface layers.
5
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00375-VL
Address: 254 South First East Street, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range Ot/R/h) Ticket No. Method* (pCi/g)
V-l 15 - 16 NAR 166 OCS 2.0
See Appendix Figure 2.1 for the verification area.
*OCS = Opposed Crystal System
7
DOE ID NO.: MS-00375-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:08-23-93
MS-00375.VL WP51
REV053193
6
10
JO
28
26
24
22
20
18
16
14
12
Y
10
10
12 1 4 16 18
i—r
20 22 24 26 28
i—r
JO J2 J4 J6 J8
~ i—r
1 777 15-16 777
15-16
BK6 4
14-15
V-1
15-16
15-16
L
©
12-15
12
v-i
16-17
UJ
Ld
CC
r—
CO
co
<
LU
CO
or
Lu
o
CO
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
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
20 10
SCALE IN FEET
20 40
40
NORTH
RADIOLOGICAL AS-BUILT
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
RM09013V 09/15/93 RTB/242
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.
J L
RCSOCNCC-HO. OT OCCUPANTS
HOH—RCSIOCHCC—HAH—HM./WK.
WSTKUUCNT NO.
VERIFICATION
VT CX. A.C. tPF. HO. OATC
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE. COLORADO
RTB 135 254 SOUTH FIRST EAST STREET
MONTICELLO, UTAH
APMOVAL
GEOTECH INC
OATC I APPROVAL OOC TATT
DOCK) NO. MS-00375-VL
owe.HO. 3-B00375-V1 tHT. 1 „ 1
2(
It
1 2
10
12 1 4 1 6 18 20 22 24 26 28 JO J2 J4 J6 J8 40
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS. INC.
JAN 2 8139+
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
MS00375
254 South 1st East Street
Monticello. Utah 84535

Vacant
GRAND JUNCTION OFFICE
P. O. BOX 2S67
GRAND JUNCTION. COLORADO 81S02
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
254 SOUTH 1ST EAST STREET
MONTICELLO, UTAH (MS00375)
A. R. Jones
January 1994
Work performed by the
ENVmONMENTAL 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
AC^OWLEDGlvffiNTS 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 254 South 1st East Street,
Monticello, Utah (MS00375) 5
v
ACKNOVVTJEDGMENTS
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 containing the tailings in an
environmentally safe manner, and perforating 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 254
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
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT 254 SOUTH 1ST EAST STREET
MONTICELLO, UTAH (MS00375)*
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 null 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-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 vacant lot located at 254 South 1st East Street, Monticello, Utah. The
remedial action plan required excavation of all exterior contaniination. 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. Tlie Environmental Technology Section (ETS) of Oak Ridge National
Laboratory (ORNL) has been assigned the responsibility of this task at the 254 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 199)
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
6 inches deep. However, during the actual removal process, a total of 3 yd3 of
contaminated earth and uranium mill tailings, 4 inches deep were removed from a 24 m2
area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of surface gamma scans with a scintillometer of the
exterior and soil sampling. Samples representative of the bottom 15-cm (6-in.) soil layers
of the 1 excavated area were collected and blended to form representative composite soil
sample for the verification area.
3
VERJTICATION 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 15 to 16 /zR/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 was one excavated area for this
property. Geotech's analysis of this sample showed a 226Ra 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 concentrations of 3.4 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.
One minor discrepancy was noted between the property folio and completion report,
the folio gives the mailing address as San Juan County Commissioner in care of Rick
Bailey.
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 254 South 1st East Street, Monticello Utah (MS0Q375)
22sRa concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No* (cm)
XI NAR 166 10-25 3.4 2.0
" 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 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 L N.ct 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: MS00375, Address: 254 South 1st 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-00438-CH
Property Address: 97 South Second East Street
Vicinity Property Certification Summary and Recommendation
Summary Evaluation
U.S. Department
Certification Criteria MACTEC-ERS of Energy (DOE)
Yes No Not Taken Yes No Not Taken
Ra-226 is <: 5 pCi/g above
background in top 15-cm-thick layer
of soil, averaged over 100 m2.
lnsitu[X]Lab[ ] [X]- [ ] [ ] [y] [ ] [ ]
Ra-226 is a 15 pCi/g above
background in any 15-cm-thick layer
of soil more than 15 cm below the
surface, averaged over 100 m2.
Insitu[ ]Lab[X] [X] [ ] [ ] [X] [ ] [ ]
Interior gamma is £ 20 uR/h above
background in any occupied or
habitable structure. [X] [ ] [ ] [X I ] [ ]
The radon decay-product
concentration in any occupied or
habitable structure is s 0.02 WL or, at
most, 0.03 WL. [X] [ ] [ ] [tf [ ] [ ]
Supplemental standards were applied
in accordance with EPA standard
40 CFR 192.21. [ ] [X] [ ] [ ] [ tf [ ]
Hot spot criteria met as outlined by
DOE guidelines for FUSRAP (Rev.2,
March 1987). [X] [ ] [ ] [/] [ ] [ ]
The excavations were backfilled with materials that were measured at the source indicating 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.
1 of 2
DOE ID No.: MS-00438-CH
MACTEC-ERS Recommendation
On the basis of the Property Completion Report evaluation, this property is recommended for
[X] Certification by DOE.
[ ] Certification by DOE with the concurrence of the U.S. Nuclear Regulatory Commission
because supplemental standards were applied according to 40 CFR 192.21.
Michael C. Butherus Date
Manager, Monticello Program
MACTEC-ERS
DOE Evaluation
On the basis ofthe Property Completion Report recommendation, this property
LM Should be certified by DOE.
[ ] Should be certified by DOE with the concurrence of the U.S. Nuclear Regulatory
Commission because supplemental standards were applied according to 40 CFR 192.21.
:atioffO~ CemficatioffOfficial
U.S. Department of Energy
Date
7- Afr f7~
Work performed under DOE Contract No. DE-AC13-96GJ87335, Task Order No. 96-05.02.14
2 of 2
Monticello Vicinity Properties Project
Property Completion Report
for
Monticello
Vicinity Property Remedial Action
for
DOE ID No.: MS-00438-CH
Address: 97 South Second East Street
Monticello, Utah 84535
April 1997
Prepared for
U.S. Department of Energy
Albuquerque Operations Office
Grand Junction Office
Prepared by
MACTEC-Environmental Restoration Services, LLC (MACTEC-ERS)*
Grand Junction, Colorado
Michael C. Butherus (yfo^
Manager, Monticello Program
Work performed under DOE Contract No. DE-AC13-96GJ87335
Task Order No. 96-05.02.14
'MACTEC-ERS has been granted authorization to conduct remedial action by the U.S. Department of Energy.
Remedial action was performed 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, Subpart B; and "Implementation," in 40 CFR 192, Subpart C, and the U.S. Department of
Energy Formerly Utilized Sites Remedial Action Program hot spot criteria.
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-00438-CH
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was established to reduce
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 U.S. Department of Energy (DOE) 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.
Cleanup activities also were conducted to meet the hot spot criteria
established by radiological protection guidelines in the DOE "Guidelines for
Residual Radioactive Material at Formerly Utilized Sites Remedial Action
Program and Remote Surplus Facilities Management Program Sites"
(Revision 2, March 1987).
This property was evaluated on the basis of EPA standards and DOE hot
spot criteria by the DOE Remedial Action Contractor. DOE reviewed these
evaluation results and determined that the property contained mill tailings
(residual radioactive material) exceeding EPA standards. The Remedial
Action Contractor was notified of the inclusion of this property into the
MVP Project and was authorized by DOE to conduct remedial action as
required to bring the property into conformance with EPA standards and
DOE hot spot criteria.
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-00438-CH
MS-00438-CH
Location No. M-173; beginning at the
SW corner of Block 21, Monticello Townsite
Survey, Plat A, north 100 feet, east 77
feet, south 100 feet, west 77 feet to the
beginning, County of San Juan, State of
Utah
97 South Second East Street
Monticello, Utah 84535

Church (CH)
Not applicable: spillover inclusion requested
by the Remedial Action Contractor
April 3, 1991
Rust Geotech
June 21, 1991
Sonderegger Inc.
P.O. Box 713
Monticello, Utah
August 23, 1991
September 24, 1991
Interior: 0 cubic yards
Exterior: 3 cubic yards
8 square meters (m2)
February 1996
2
DOE ID No.: MS-00438-CH
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 quantity of contamination for this property was not
specified because it was assessed as part of Block MS-09021-BK. The
remedial action process included the removal of approximately 3 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-00438-CH
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 the Remedial Action
Contractor during May 1990, as described in the final REA dated
June 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, 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 to 18 microroentgens per
hour (//R/h), as indicated on Appendix Figure 2.1. The result of
analysis for radium-226 in one composite soil sample was
1.6 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 0.0026 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-00438-CH
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by EPA standards (40 CFR 192.12, 192.20-23) and
DOE hot spot criteria, as indicated in the Certification Data Summary
below.
Therefore, the property located at 97 South Second East Street, in
Monticello, Utah, is recommended for certification as required by DOE
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 to 13 //R/h.
Annual average was
0.0026 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 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 result was
1.6 pCi/g.**
*The background exposure rate is approximately 14//R/h.
The background radium-226 concentration is approximately 2.0 pCi/g.
* *The hot spot criteria were met based on gamma scans and/or soil sample results.
5
DOE ID No.: MS-00438-CH
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
MRW:09-01-95
MS-00438.CH WP61
REV080195
6
Table 3.1
Post-Excavation Measurement/Results
DOE ID No.: MS-00438-CH
Address: 97 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. Method8 (pCi/g) (pCi/g) (pCi/g)
V-1 13-18 NAH704 AL 1.6 ±0.3 18.6 ± 4.2 0.5 ± 0.2
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-00438-CH
Address: 97 South Second East Street, Monticello, Utah
Instrument Type: Landauer Radtrak Detector
Radon
Detector Tracks Per Concentration Working
Number Start Date End Date mm2 (pCi/L) Level
3729931 07-20-93
3729880 07-20-93
3729899 07-20-93
08-17-94 6.4
08-17-94 7.1
08-17-94 5.1
0.53 0.0027
0.58 0.0029
0.42 0.0021
Annual Average: 0.0026
See Appendix Figure 2.1 for the measurement location.
8
DOE ID No.: MS-00438-CH
Property Address: 97 South Second East Street
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
Rust Geotech of Energy (DQE)
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 DOE
guidelines for FUSRAP
(Rev. 2, March 1987).
YES NO NOT TAKEN
[X]* [ ] [ ]
IX] [ ] [ ]
[X] [ ] [ ]
[X] [ ] [ ]
[ 1 [X] [ ]
[X] [ ] [ ]
YES NO NOT TAKEN
[ ] I ] [ ]
[ ] [ 1 [ ]
[ 1 [ 1 [ 1
[ 1 I I I I
[ 1 [ ) [ )
I ] [ 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.
DOE ID No.: MS-00438-CH
RUST GEOTECH RECOMMENDATION
Based on the Rust evaluation, I recommend this property for:
[X] Certification by the U.S. Department of Energy.
[ ] Certification by the U.S. Department of Energy with application of
supplemental standards per 40 CFR 192.21.
Wanda S. Busby Date
Manager, Monticello Programs
Rust Geotech
DOE EVALUATION
[ ] Should be certified by the U.S. Department of Energy.
[ ] Should be certified by the U.S. Department of Energy with application of
supplemental standards per 40 CFR 192.21.
Certification Official
U.S. Department of Energy
Date
10
30
12 14 16 18 20 22 24
T
26 28 30
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32 34
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NORTH
THIS DRAWING 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.
I I J L
rv.-TTi
12-15
12
V-1
16-17
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
- 28
26
24
22
20
18
RADIOLOGICAL AS-BUILT
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
16
«SI0ENC£-NO. Of OCCUPANTS
NON-KESID£NCC-UAM-HRS./«K.
INSTRUMENT NO.
VERIFICATION
•V CK. A.E. APP.
14
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE, COLORADO
-3X-
3fe
97 SOUTH SECOND EAST ST.
MONTICELLO, UTAH
12
APPROVAL
Rust Qeotcch
USUI I APPROVAL OOt "6ATT
OOEIONO. MS-00438-CH
OWC.NO. 3-B00438-V1 1 or 1
10
10 12 1 4 16 18 20 22 24 26 28 30 32 34 36 38 40
OAK RIDGE NATIONAL LABORATORY PHONE: p70)24K20o
"MANAGED BY LOCKHEhU MARTIN ENERGY RESEARCH CORPORA I H)N ' " '—'""TfX"tpiaf7«PSUir
FOR THE UJS. DEPARTMENT OF ENERGY
POST OFFICE BOX 2587
GRANO JUNCTION, COLORADO S13C2 j^/jy J | |(jgg
Ms. Mary Ann Rondinella
Project Coordinator, Monticello Projects
U.S. Department of Energy
P. O. Box 2567
Grand Junction, Colorado 81502
Dear Ms. Rondinella:
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 rates 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: MS0O438-CH
Location Address: 97 South 2nd East Street
Monticello, Utah 84535
Property Owner:

Tenant Name: Same
Attachments
HEALTH SCIENCES RESEARCH DIVISION
Waste Management Research and Developments Programs
(Activity No. EX 20 10 401)
RESULTS OF THE TYPE A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
97 SOUTH 2ND EAST STREET
MONTICELLO, UTAH (MS00438-CH)
M. J. Wilson-Nichols
May 1996
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
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 .. ^ 3
CONCLUSION .V; 3
REFERENCES 5
iii
Applicable guidelines for protection against radiation
iv
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 N. F. Kirby 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 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 1991, RUST Geotech, the
remedial action contractor designated by DOE, performed remedial action on the vicinity
property at 97 South 2nd East Street, Monticello, Utah. The Errvironmental Technology
Section (ETS) of Oak Ridge National Laboratory was assigned the responsibility of veri-
fying the data supporting the adequacy of remedial action and confirming the site's com-
pliance 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 Environmen-
tal Technology Section Procedures Manual (ORNL 1993).
ix
1
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT 97 SOUTH 2ND EAST STREET
MONTICELLO, UTAH (MS00438-CH)*
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 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 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 esta-
blished 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 ac-
tions 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 cus-
tody 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 Group in the
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.
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 church located at 97 South 2nd East Street, Monticello, Utah. The reme-
dial action plan required excavation of all exterior contarnination. When the excavation
was completed, the property was resurveyed, including soil sampling, to ensure the re-
moval of all contamination, backfilled with uncontaminated material, and restored to a
condition comparable to that which existed prior to remedial action (Geotech 1996).
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 97 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 Decertified 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 1996)
indicates 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.
This property was assessed as part of Block MS09021, therefore, the quantity of
material assessed is not available. During the actual removal process, a total of 3 yd3 of
contaminated earth and uranium mill tailings, 10 inches deep, was removed from an 8 m2
area.
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 ofthe structure, a surface scan of the exterior, and soil sampling. Samples repre-
sentative ofthe bottom 15-cm (6-in.) soil layers of one excavated verification area was
collected and blended to form a representative composite soil samples for the verification
area. The RAC is unable to locate or inadvertently disposed of the sample requested for
ORNL confirmatory analysis.
3
VERIFICATION OF REMEDIAL ACTION
All measurements presented ih 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
church ranged from 12 to 13 uR/h. 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
area 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 a ^Ra concentration of 1.6 pCi/g. ORNL
ETS was unable to attain samples for confirmatory analysis. Gamma ranges and/or soil
sample results demonstrate compliance to the DOE Hot Spot Guidelines for areas <25 m2
(Table 1).
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 church located on this property for a period of
approximately one year (from July 20, 1993 to August 17, 1994). The average annual
working level (WL) of radon progeny concentration, as determined by the TechVOps-
Landauer Corporation, was 0.0026, which is well below the 0.03-WL guideline given in
Table 1.
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 measure-
ments 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
Radionuclide
concentrations in soil
for Hot Spot areas
Exposure to 222Rn
progeny
Maximum Permissible
concentration of Ra226 in soil
above background level, for
areas less than 25 m2
Average annual radon proge-
ny concentration (including
background)
Ra226 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)
5
REFERENCES
Geotech 1996. Properly Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00438-CH, Address: 97 South Second East Street,
Monticello, Utah 84535, Geotech, Grand Junction, Colorado, February 1996.
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.
DOE ID No.: MS-00442-VL
Property Address: Parcel No. A0000022001A, South Second East Street
Vicinity Property Certification Summary and Recommendation
Summary Evaluation
Certification Criteria MACTEC-ERS
U.S. Department
of Energy (DOE)
Ra-226 is s 5 pCi/g above
background in top 15-cm-thick layer
of soil, averaged over 100 m2.
In situ [X] Lab [ ]
Ra-226 is ^ 15 pCi/g above
background in any 15-cm-thick layer
of soil more than 15 cm below the
surface, averaged over 100 m2.
In situ [ ]Lab[X]
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 WL or, at
most, 0.03 WL.
Supplemental standards were applied
in accordance with EPA standard
40 CFR 192.21.
Hot spot criteria met as outlined by
DOE guidelines for FUSRAP (Rev.2,
March 1987).
Yes No Not Taken Yes No Not Taken
[X]a [ ]
[X] [ ]
[ ] [ ]
[ ] [ ]
[ ] [X]
[X] [ ]
[ ]
[ ]
[X]b
[X]b
[ ]
[ ]
IA] I ]
1*1 [ ]
[ ] [ ]
[ ] [ ]
[ ] [XI
Url [ ]
[ ]
[ ]
OT
[X]
[ ]
[ ]
The excavations were backfilled with materials that were measured at the source indicating 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.
"Vacant lot.
1 of 2
DOE ID No.: MS-00442-VL
MACTEC-ERS Recommendation
On the basis of the Property Completion Report evaluation, this property is recommended for
[X] Certification by DOE.
[ ] Certification by DOE with the concurrence of the U.S. Nuclear Regulatory Commission
because supplemental standards were applied according to 40 CFR 192.21.
Manager, Monticello Program
MACTEC-ERS
DOE Evaluation
On the basis of the Property Completion Report recommendation, this property
IX ] Should be certified by DOE.
[ ] Should be certified by DOE with the concurrence of the U.S. Nuclear Regulatory
Commission because supplemental standards were applied according to 40 CFR 192.21.
U.S. Department of Energy
Work performed under DOE Contract No. DE-AC13-96GJ87335, Task Order No. 96-05.02.14
2 Of 2
Monticello Vicinity Properties Project
Property Completion Report
for
Monticello
Vicinity Property Remedial Action
for
DOE ID No.: MS-00442-VL
Address: Parcel No. A0000022001A,
South Second East Street
Monticello, Utah 84535
April 1997
Prepared for
U.S. Department of Energy
Albuquerque Operations Office
Grand Junction Office
Prepared by
MACTEC-Environmental Restoration Services, LLC (MACTEC-ERS)*
rand Junction, Colorado
Michael C. Butherus
Manager, Monticello Program
Work performed under DOE Contract No. DE-AC13-96GJ87335
Task Order No. 96-05.02.14
*MACTEC-ERS has been granted authorization to conduct remedial action by the U.S. Department of Energy.
Remedial action was performed 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, Subpart B; and "Implementation," in 40 CFR 192, Subpart C, and the U.S. Department of
Energy Formerly Utilized Sites Remedial Action Program hot spot criteria.
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 , fri 4
3.2 Recommendatiqn for Certification 5
4.0 APPENDIX 6
DOE ID NO.: MS-00442-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-00442-VL
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
MS-00442-VL
Beginning at a point that is 120 feet north from the SE corner of Lot 1, Block
22, Monticello Townsite Survey; west 214.5 feet, north 115 feet, east 100
feet, south 101 feet, east 114.5 feet, south 14 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:
Parcel No. A0000022001A
South Second East Street
Monticello, Utah 84535

Vacant Lot (VL)
Not applicable; inclusion requested by the
Remedial Action Contractor
August 2?, 1991
RUST Geotech Inc.
October 21, 1991
Crowley Construction
East Route
Monticello, Utah
May 7, 1992
July 14, 1992
Interior:
Exterior:
0 cubic yards
866 cubic yards
941 square meters (ma)
October 1993
2
DOE ID NO.: MS-00442-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 24 inches deep, within the property. The remedial
action process included the^ removal of approximately 866 cubic
yards of residual radioactive material, ranging from 6 inches to
72 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-00442-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
September 1990, 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 sscan 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 (/yR/h)
to 19 //R/h (Appendix figure 2.1). The results of analyses for
radium-226 in 14 composite soil samples ranged from
1.5 picocuries per gram (pCi/g) to 4.0 pCi/g (Appendix Table 3.1).
The composite samples representing Areas V-1 and V-2 included
soil samples taken from MS-00444-VL (Areas V-1 and V-2); Areas
V-4, V-9, V-10, and V-11 included soil samples taken from
MS-00446-HO (Areas V-1 through V-5); Areas V-5 through V-8
included soil samples taken from MS-00445-RS (Areas V-3
through V-5); and Areas V-5 and V-14 included soil samples taken
from MS-00443-CS (Areas V-3 and V-4).
4
DOE ID NO.: MS-00442-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. A0000022001A, 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 Standards Survey Results
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
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.
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 ma.
Npt applicable:
vacant lot.
Not applicable:
vacant lot.
< 5 pCi/g above
background.
Soil sample results
ranged from 1.5 pCi/g
to 4.0 pCi/g.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00442-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: 10-21-93
MS-000442.VL WP51
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00442-VL
Address: Parcel No. A0000022001 A, South Second East Street, Monticello, Utah
Area
Exposure-Rate
Range (//R/h)
Soil Sample
Ticket No.
Meas.
Method*
Radium-226
(pCi/g)
V-l*
V-2T
V-3
V-4f
V-5*
V-6*
V-7f
V-8r
V-9*
V-10t
V-l 1t
V-12
V-13
V-14
13
12
14
13
14
14
14
14
15
14
13
13
13
13
17
17
18
16
16
15
16
17
19
19
19
16
15
16
NAO 315
NAO 314
NAO 312
NAO 313
NAR 765
NAT-410
NAS.-581
NAS 582
NAS 583
NAS 584
NAO 308
NAO 309
NAO 310
NAO 311
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
OCS
4.0
1.5
2.3
2.6
2.9
2.1
1.8
3.5
2.4
1.9
1.9
3.7
3.6
1.6
See Appendix Figure 2.1 for the verification areas.
*OCS = Opposed Crystal System
^he composite samples representing Areas V-1 and V-2 included soil samples
taken from MS-00444-VL; Areas V-4, V-9, V-10, and V-11 included soil samples
taken from MS-00446-HO; Areas V-5 through V-8 included soil samples taken from
MS-00445-RS; and Areas V-5 and V-14 included soil samples taken from
MS-00443-CS.
7
JO
28
26
24
22
20
18
r—r
V-4
13-16
21 V-9
60 60 15-19 V-10 36 36 27-'-5 14-19
V-1 1 V-3
13-19 14-18
V-2 V-8
60 .(1 27 .VY 36 12-17 72 48 14-17
60 24 30 54
2
V-12 12 V-7 12 13-16 V-1
4-16
13-17
12
V-6
4-15
15-17
V-13
12 13-15
V-5
V-14
14-16
13-16
12 1 5>. • • • V./
a 12
T—i—i—i—r
©
<D
Lv.vj
12-15
12
V-i
16-17
15-17
34 38 40
LEGEND
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
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
AND EXCAVATION EXPOSURE-RATE RANGE
t.
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
_J
LU
QC
I—
tO
to <
UJ
o z
o
o
LU
to
r> o
to
2t
2e
24
22
20
18
16
14
12
10
SCALE IN FEET
20 10 0
RM00442V 10/25/93 TMT/529
20 40 NORTH
i 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.
J L
RADIOLOGICAL AS-BUILT
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
KSntHcc-HO. ar OCCUTMTS
HOJf-«SID€IICC-IUN'HIU./>K.
INSntWOfT NO.
CK. KC. trr. NO. tat
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE. COLORADO
not. CNCR.
SINHIITTCD
°2i PARCEL NO. A0000022001A
SOUTH SECOND EAST STREET
MONTICELLO. UTAH
APMOVAI.
GEOTECH INC
Mt |A»M6Vil6M TOT
001,0M0- MS-00442-VL
we w. 3-B00442-V1 €„ 1 „ 1
16
14
12
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
GRAND JUNCTION. COLORADO 81502
'JAN 2 8199*
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: MS00442
Location Address: A0000022001A South 2nd East Street
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
A0000022001A SOUTH 2ND EAST STREET
MONTICELLO, UTAH (MS00442) '
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
VERIHCATION OF REMEDIAL ACTION .....«v 3
Gamma Measurements r*. 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 A0000022001A, South 2nd
East Street, Monticello, Utah (MS00442) 5
V
ACXNOWLE1XJMENTS
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 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 matetial resulting from mill
operations. During 1992, RUST Geotech, the remedial action contractor
designated by DOE, performed remedial action on the vicinity property at
A0000022001A, 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
RESTJLTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT A0OOOO22OA1A SOUTH 2ND EAST STREET
MONTICELLO, UTAH (MS00442)*
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 thc Health Sciences Research
Division at Oak Ridge National Laboratory under DOE contract DE-AC05-84OR21400 with Martin
Marietta Energy Systems, Ina
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 A0000022001A, 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
A0000022001A, South 2nd East Street, site. This report describes the methods and results
of that verification.
PROCEDURES
Objectives -:/
i
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 320 yd3 of mill
tailings 6 to 24 inches deep. However, during the actual removal process, a total of 866
yd3 of contaminated earth and uranium mill tailings, 6 to 72 inches deep were removed
from a 941 m2 area.
A post-excavation survey was performed by Geotech prior to backfilling of the
excavated areas. This survey consisted of surface gamma scans with a scintillometer of the
exterior and soil sampling. Samples representative of the bottom 15-cm (6-in.) soil layers
of the 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 exposure rate measurements taken by Geotech at ground-
level of excavated areas prior to backfilling ranged from 13-19 fjRJh.
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 1.5 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 226Ra concentrations from 2.0 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.
One discrepancy was noted in the review of the completion report. According to the
field map, Area V2 has gamma readings of 14-17 uR/h and not 12-17 uR/h as stated in the
completion report. This does not, however, change our recommendation to certify this
property.
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 A0(XXXr22001A, South 2nd East Street, Monticello Utah fMS00442)
^Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No* (cm)
dX2 NAO 314 >15 3.6 1.5
*X5 NAR 765 >15 2.0 2.9
CX6 NAT 410 . >15 2,5 2,1
°X7 NAS 581 >15 2.8 1.8
°X8 NAS 582 ' >15 2.9 3.5
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.
Soil samples includes soil from MS00445.
d SoU sample includes soil from MS00444.
6
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: MS00442, Address: A0000022001A, South 2nd East 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.
DOE ID No.: MS-00443-CS
Property Address: 165 East First South Street
Vicinity Property Certification Summary and Recommendation
Summary Evaluation
U.S. Department
Certification Criteria MACTEC-ERS of Energy (DOE)
Yes No Not Taken Yes No Not Taken
[X]a [ ] [ ] [*] [ ] [ ]
[X] [ ] [ ] LX] [ ] [ ]
[ ] [ ] [X]b [ ] [ ] [*]
Ra-226 is i 5 pCi/g above
background in top 15-cm-thick layer
of soil, averaged over 100 m2.
In situ [X] Lab [ ]
Ra-226 is * 15 pCi/g above
background in any 15-cm-thick layer
of soil more than 15 cm below the
surface, averaged over 100 m2.
In situ [ ]Lab[X]
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 WL or, at
most, 0.03 WL. [ ]
Supplemental standards were applied
in accordance with EPA standard
40 CFR 192.21. [ ]
Hot spot criteria met as outlined by
DOE guidelines for FUSRAP (Rev.2,
March 1987).
[ 1 [X]b MM [X]
[X] [ ] [ ] [XI I I
Wil [ I pq [ ] I ]
"The excavations were backfilled with materials that were measured at the source indicating 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.
bExcessive ventilation caused by open bay doors.
1 of 2
DOE ID No.: MS-00443-CS
MACTEC-ERS Recommendation
On the basis of the Property Completion Report evaluation, this property is recommended for
[X] Certification by DOE.
[ ] Certification by DOE with the concurrence of the U.S. Nuclear Regulatory Commission
because supplemental standards were applied according to 40 CFR 192.21.
On the basis of the Property Completion Report recommendation, this property
[X] Should be certified by DOE.
[ ] Should be certified by DOE with the concurrence of the U.S. Nuclear Regulatory
Commission because supplemental standards were applied according to 40 CFR 192.21.
Date
Manager, Monticello Program
MACTEC-ERS
DOE Evaluation
U.S. Department of Energy
Work performed under DOE Contract No. DE-AC13-96GJ87335, Task Order No. 96-05.02.14
2 of 2
Monticello Vicinity Properties Project
Property Completion Report
for
Monticello
Vicinity Property Remedial Action
for
DOE ID No.: MS-00443-CS
Address: 165 East First South Street
Monticello, Utah 84535
April 1997
Prepared for
U.S. Department of Energy
Albuquerque Operations Office
Grand Junction Office
Prepared by
MACTEC-Environmental Restoration Services, LLC (MACTEC-ERS)*
Grand Junction, Colorado
Michael C. Butherus
Manager, Monticello Program
Work performed under DOE Contract No. DE-AC13-96GJ87335
Task Order No. 96-05.02.14
*MACTEC—ERS has been granted authorization to conduct remedial action by the U.S. Department of Energy.
Remedial action was performed 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, Subpart B; and "Implementation," in 40 CFR 192, Subpart C, and the U.S. Department of
Energy Formerly Utilized Sites Remedial Action Program hot spot criteria.
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 .' . f: 6
DOE ID NO.: MS-00443-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 bf 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 ^tJopted the "Standards for
Remedial Actions at Inactive Uranium Processing Sites" (40 CFR Part 192)
for all cleanup activities under trie 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-00443-CS
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
MS-00443-CS
Parcel M-178-1; Beginning at a point that is 139.5 feet west from the SE corner
of Block 22, Monticello Townsite Survey; west 75 feet, north 120 feet, east 75
feet, south 120 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:
165 East First South Street
Monticello, Utah 84535

Commercial Structure (CS)
Not applicable; inclusion requested by the
Remedial Action Contractor
August 23, 1991
RUST Geojech Inc.
October 21, 1991
Crowley Construction
East Route
Monticello, Utah
May 7, 1992
July 10, 1992
Interior:
Exterior:
0 cubic yards
75 cubic yards
162 square meters (m2)
October 1993
2
DOE ID NO.: MS-00443-CS
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 12 inches deep, within the property. The remedial
action process included the removal of approximately 75 cubic
yards of residual radioactive material, ranging from 8 inches to
24 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-00443-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 RUST Geotech Inc. during
September 1990, as described in the final REA dated
October 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 12 microroentgens per hour OuR/h)
to 19 jt/R/h (Appendix Figure 2.1f.' The results of analyses for
radium-226 in four composite soil samples ranged from
1.0 picocurie per gram tpCi/g) to 2.9 pCi/g (Appendix Table 3.1).
The composite samples representing Areas V-3 and V-4 included
soil samples taken from MS-00442-VL (Areas V-5 and V-14), and
Area V-3 also included soil samples taken from MS-00445-RS
(Area V-5).
3.1.3 Radon Decay-Product Concentration (RDC) Measurement
RDC measurements were not taken in the structure due to
excessive ventilation caused by open bay doors; therefore, this
structure was verified according to exterior standards.
4
DOE ID NO.: MS-00443-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 165 East First 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:
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
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.
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.
Survey Results
Not applicable:
uninhabitable structure.
Not applicable:
uninhabitable structure.
< 5 pCi/g above
background.
Soil sample results
ranged from 1.0 pCi/g
to 2.9 pCi/g.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00443-CS
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: 10-21-93
MS-00443.CS WP51
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00443-CS
Address: 165 East First South Street, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range (//R/h) Ticket No. Method* (pCi/g)
V-l 13 - 19 ' NAR 761 OCS 1.0
V-2 13 - 19 NAR 762 OCS 2.3
V-3t 14 - 16 NAR 765 OCS 2.9
V-4f 13 - 16 NAO 311 OCS 1.6
See Appendix Figure 2.1 for the verification areas.
*OCS = Opposed Crystal System *r*
fThe composite samples representing Areas V-3 and V-4 included soil samples from
MS-00442-VL, and Area V-3 also included soil samples taken from MS-00445-RS.
7
10
30
28
26
24
22
20
18
16
1 4
12
10
10
Y
12 1 4 16
SCALE IN FEET
20 10 0 20
RM004«JV 10/25/93 TMT/529
J L
1 2 1 4 16
18
V-3
14-16
<
<
20 22 24
X 12
JL
rmm.
UNINHABITABLE
ONE STORY METAL
BUILDING
26 28
V-4
13-16
12
1
24
SHED
V-2
V-1 13- 19
13-19
••••
14-17
12
10
13 12-15
14-
J
EAST FIRST SOUTH STREET
40 ft
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.
J L
18 20 22
I
24 26 28
30
©
<D
^1
LV..VJ
12-15
12
v-i
16-17
32 34 36 38
i—T
LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN /zR/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 ACTIC^I
• *
40
RADIOLOGICAL AS-BUILT
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
RCUOCNCC-HO. OT OCCUPANTS
NOM-IICSIOCHCC-UAN-HM./WK.
WSTKUUCMT MO.
SURVEY OATC
vcmncAnoN
30
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE. COLORADO
JLk.
TT
XA-
165 EAST FIRST SOUTH STREET
MONTICELLO. UTAH
APpftOMl
GEOTECH INC
OAK IAPMOVALOOC TSATT
ootioMo. MS-00443-CS
3-B0044.-S-V1 SHT.1 or 1
3C
28
26
24
22
20
18
16
14
12
10
32 34 36 38 40
GRANO JUNCTION OFFICE
P.O. BOX 2567
GRANO JUNCTION. COLORADO 81502
OAN 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
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS. INC.
Location Number: MS00443-CS
Location Address: 165 East 1st South 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
165 EAST 1ST SOUTH STREET
MONTICELLO, UTAH (MS00443-CS)
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
LIST OF FIGURES v
ACKNOWLEDGMENTS vii
ABSTRACT , vii
INTRODUCTION 1
PROCEDURES 2
Objectives 2
Document Reviews 2
VERIFICATION OF REMEDIAL ACTION 3
t
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 165 East 1st South
Street Monticello, Utah (MS00443-CS) 5
LEST OF FIGURES
1 Property Map , ' 7
<•<
i
V
AOO^OWLEDGMENTS
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 M. K. Jensen and T. L. Holmes
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 1992, RUST Geotech Inc., the
remedial action contractor designated by DOE, performed remedial action on the vicinity
property at 165 East 1st South Street, Monticello, Ufan. 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 165 EAST 1ST SOUTH STREET
MONTICELLO, UTAH (MS00443-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 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-AC05-84OR214O0 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 commercial structure located at 165 East 1st South 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 165 East 1st South 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 30 yd3 of mill tailings
6 to 12 inches deep. However, during the actual removal process, a total of 75 yd3 of
contaminated earth and uranium mill tailings, 8 to 24 inches deep, were removed from a
162 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 over the
excavated areas prior to backfilling ranged from 13 to 19 jiR/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 four exterior verification
areas. Geotech's analysis of these samples showed ^Ra concentrations from 1.0 to
2.9 pCi/g in the composite sample. ORNL ETS obtained two of these soil samples and
performed a confirmatory analysis, which showed ^Ra concentrations from 1.3 to 2.3
pCi/g, These values are below the DOE guideline vafue of 15 pCi/g for soil layers >15
cm below the surface (Table 1). Results qf Geotech and ORNL soil sample analyses are
given in Table 2.
The commercial structure on this property was considered uninhabitable, no valid
radon decay-products concentration (RDC) measurements could be taken. The structure
was verified using exterior standards.
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 and Geotech analyses of sofl samples
from 165 East 1st South Street, Utah (MS00443-CS)
^Ra concentration (pCi/g")
ORNL Geotech
sample sample Depth
No." No* (cm) Confirmatory4 ORNLrf Geotech
XI NAR 761 >15 1.3 23 1.0
X2 NAR 762 >15 2.3 1.7 2.3
* 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 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.
" Sample not taken by ORNL
6
ORNL SURVEY RESULTS
Gamma Measurements
Measurements taken by ORNL over the ground surface in the excavated areas prior
to backfilling ranged from 12 to 16 uR/h (Figure 1).
ORNL detected two point sources reading 41 uR/h and 26 uR/h. The RAC was
notified and the point sources were removed.
Soil Sample Analysis
ORNL sampled two 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 two composite Soil samples representative of an average over the
exterior verification areas. ORNL's analysis of these composite samples showed ^Ra
concentrations of 1.7 and 2.3 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 ORNL sample
analyses are given in Table 2.
CONCLUSION^'
x
t -•
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!
x
1 SH
V2
UNINHABITABLE
ONE STORY METAL
BUILDING
VI
©*
41 uR/h |
POINT^OURCE
REMOVED.
J
EXPLANATION
CONCRETE
ASSESSED AREA OF
CONTAMINATION
EXCAVATED
AREA
REMAINING
CONTAMINATION
MEASUREMENT
AREA IDENTIFIER Sc
COMPOSITE SAMPLE
IDENTIFIER OF
Bl I AVERAGED AREA &
BIASED SAMPLE
V1
V2
12-16 jj.R/h
12-16 /tR/h
1 26 /iR/h
iPOINT SOURCE
REMOVED
N.
EAST 1ST SOUTH STREET
MS00443
165 EAST 1ST SOUTH STREET
MONTICELLO. UTAH
FEET
METERS
Figure 1. Property Map AW 11/24/M
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: MS00443-CS, Address: 165 East 1st South 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.
1 i
DOE ID No.: MS-00444-VL
Property Address: Parcel No. A0000022001E, South Second East Street
Vicinity Property Certification Summary and Recommendation
Summary Evaluation
U.S. Department
Certification Criteria MACTEC-ERS of Energy (DOE)
Yes No Not Taken Yes No Not Taken
Ra-226 is s: 5 pCi/g above
background in top 15-cm-thick layer
of soil, averaged over 100 m2.
In situ [X] Lab [ ] [X]" [ ] [ ] [ ] [ ]
Ra-226 is s 15 pCi/g above
background in any 15-cm-thick layer
of soil more than 15 cm below the
surface, averaged over 100 m2.
Insitu[ ]Lab[X] [X] [ ] [ ] [/] [ ] [ ]
Interior gamma is <. 20 uR/h above
background in any occupied or
habitable structure. MI] [X]b [ ] [ ] [/[
The radon decay-product
concentration in any occupied or
habitable structure is <; 0.02 WL or, at
most, 0.03 WL. [ ] [ ] [X]b [ ] [ ] [ *
Supplemental standards were applied
in accordance with EPA standard
40 CFR 192.21. [ ] [X] [ ] [ ] [X] [ ]
Hot spot criteria met as outlined by
DOE guidelines for FUSRAP (Rev.2,
March 1987). [X] [ ] [ ] [X] [ 1 [ 1
"The excavations were backfilled with materials that were measured at the source indicating 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.
"Vacant lot.
1 of 2
DOE ID No.: MS-00444-VL
MACTEC-ERS Recommendation
On the basis of the Property Completion Report evaluation, this property is recommended for
[X] Certification by DOE.
[ ] Certification by DOE with the concurrence of the U.S. Nuclear Regulatory Cornmission
because supplemental standards were applied according to 40 CFR 192.21.
%&7-fichael C. Butherus
Manager, Monticello Program
MACTEC-ERS
Date
4V trt*?
DOE Evaluation
On the basis of the Property Completion Report recommendation, this property
Should be certified by DOE.
[ ] Should be certified by DOE with the concurrence of the U.S. Nuclear Regulatory
Commission because supplemental standards were applied according to 40 CFR 192.21.
Certification Official
U.S. Department of Energy
Date
9-4^4*
Work performed under DOE Contract No. DE-AC 13-96GJ87335, Task Order No. 96-05.02.14
2 of 2
Monticello Vicinity Properties Project
Property Completion Report
for
Monticello
Vicinity Property Remedial Action
for
DOE ID No.: MS-00444-VL
Address: Parcel No. A0000022001E,
South Second East Street
Monticello, Utah 84535
April 1997
Prepared for
U.S. Department of Energy
Albuquerque Operations Office
Grand Junction Office
Prepared by
MACTEC-Environmental Restoration Services, LLC (MACTEC-ERS)*
id Junction, Colorado
Michael C. Butherus
Manager, Monticello Program
Work performed under DOE Contract No. DE-AC13-96GJ87335
Task Order No. 96-05.02.14
*MACTEC-ERS has been granted authorization to conduct remedial action by the U.S. Department of Energy.
Remedial action was performed 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, Subpart B; and "Implementation," in 40 CFR 192, Subpart C, and the U.S. Department of
Energy Formerly Utilized Sites Remedial Action Program hot spot criteria.
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 I V. 6
DOE ID NO.: MS-00444-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-00444-VL
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
MS-00444-VL
Beginning 194 feet south of the NE corner of Block 22, Monticello Townsite
Survey; west 107.5 feet, south 10 feet, west 7 feet, south 91 feet, east
114.5 feet, north 101 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:
Parcel No. A0000022001E
South Second East Street
Monticello, Utah 84535

Vacant Lot (VL)
Not applicable; inclusion requested by the
Remedial Action Contractor
August 2# 1991
EOST Geotech Inc.
October 21, 1991
Crowley Construction
East Route
Monticello, Utah
May 7, 1992
July 10, 1992
Interior:
Exterior:
0 cubic yards
90 cubic yards
305 square meters (m2)
October 1993
2
DOE ID NO.: MS-00444-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
to 12 inches deep, within the property. The remedial action
process included the removal of approximately 90 cubic yards
of residual radioactive material, ranging from 6 inches to
15 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-00444-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
September 1990, as described in the final REA dated
October 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 12 microroentgens per hour (//R/h)
to 17 /;R/h (Appendix Fjj&ure 2.1). The results of analyses for
radium-226 in five composite soil samples ranged from
1.5 picocuries per gram (pCi/g) to 4.0 pCi/g (Appendix Table 3.1).
The composite samples representing Areas V-1 and V-2 included
soil samples taken from MS-00442-VL (Areas V-1 and V-2).
4
DOE ID NO.: MS-00444-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. A0000022001E, 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:
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
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.
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.
Survey Results
Not applicable:
vacant lot.
Not applicable:
vacant lot.
< 5 pCi/g above
background.
Soil sample results
ranged from 1.5 pCi/g
to 4.0 pCi/g.
*The background radium-226 concentration is approximately 2.0 pCi/g.
5
DOE ID NO.: MS-00444-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: 10-20-93
MS-00444.VL WP51
REV053193
4?
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00444-VL
Address: Parcel No. A0000022001E, South Second East Street, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range (//R/h) Ticket No. Method* (pCi/g)
— — *. —•
V-l* 12 - 17 NAO 314 OCS 1.5
V-2f 13-17 NAO 315 OCS 4.0
V-3 12 - 17 NAO 316 OCS 1.5
V-4 14 - 16 NAO 317 OCS 1.8
V-5 13 - 15 NAO 318 OCS 1.5
, *»
See Appendix Figure 2.1 for the verification areas.
*OCS = Opposed Crystal System
'The composite samples representing Areas V-1 and V-2 included soil samples taken
from MS-00442-VL.
7
u
i—r i—i—i—i—i i i—i—i—i—i—r i—r i—r i—r
15-17
I SHED
I 16-r17
::.\
/} 0 15-17 /•::] 6 V-3
12-17
V-1
12-17
V-1
12-17
12 15
V-4 1 2 ••• < 6
4-16
. J.
V-2 f 13-17
12 15-17
V-5 V-2
13-15 13-17
L .J 12
UJ
UJ
on
I—
CO
CO
<
UJ
Q
z
o
o
UJ
CO
3
o
CO
©
<D
n\Y7i
LV.vj
12-15
12
v-1
16-17
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
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
SCALE IN FEET
20 10 0
RM00444V 10/26/93 TUT/529
20 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.
RADIOLOGICAL AS-BUILT
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
«CSIOCNCC-NO. or occi
NO*-imiOCMCC-IUN-H*S./>n(.
msrauwcjfl KO.
turner OATC
U.S. DEPARTMENT OF ENERGY
CRA.NO JUNCTION PROJECTS OFFICE. COLORADO
PARCEL NO. A0000022001E
SOUTH SECOND EAST STREET
MONTICELLO, UTAH
ATP'OVAi
GEOTECH INC
Terr APPROVAL DOC •EATT"
°wo"<>- MS-00444-VL
0-S.H0.3-B00444-V1 M 1
10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
I i
OAK RIDGE NATIONAL LABORATORY
OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS. INC.
'M 2 81994
GRAND JUNCTION OFFICE
P. 0. BOX 2567
GRAND JUNCTION. COLORADO 81502
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 a5./this property.
Therefore, this property1 is recommendecWor certification by the U.S. Depart-
ment of Energy.
Sincerely,
Gretchen A. Pierce
MVP/IVC Project Manager
Environmental Assessment Group
Location Number: MS00444
Location Address: A0000022001E. South 2nd East Street
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
AOTjt)0022001E, SOUTH 2ND EAST STREET
MONTICELLO, UTAH (lvIS00444)
Amy 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
CX5NTENTS
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 A0000022001E, South 2nd
East Street, Monticello, Utah (MS00444) 5
V
ACXNOVVT^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 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
A0XW0022001E, 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 acnori*objectives. Procedures used by
the ETS are described in the Environmental Technology Section Procedures
Manual (ORNL, 1993).
ix
RESULTS OF THE juNDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT AO)00022u01E, SOUTH 2ND EAST STREET
MONTICELLO, UTAH (MS00444)*
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 terniinated 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 substance^, extracted in the milling process.
Other constituents of the ore remained in the taiiings and were not separated prior to
disposal. During the years of active mill operation, the mill taiiings 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 A0000022001E, 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
A0000022001E, 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 deiscribes 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 54 yd3 of mill tailings
6 to 12 inches deep. However, during the actual removal process, a total of 90 yd3 of
contaminated earth and uranium mill tailings, 6 to 15 inches deep were removed from a
305 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 using 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 12 to 17 (jR/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 five excavated areas for this
property. Geotech's analysis of these samples showed ^Ra concentrations from 1.5 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 2.0 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 A0000022001E, South 2nd East Street, Monticello Utah (MS00444)
^Ra concentration (pCi/g)
ORNL Geotech ~
sample sample Depth ORNL Geotech
No." No* (cm)
XI NAO 314 >15 3.6 1.5
X4 NAO 317 >15 2.0 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 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: MS00444, Address: A0000022001E, South 2nd East 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.
DOE ID No.: MS-00535-RS
Property Address: 117 North First West Street
Vicinity Property Certification Summary and Recommendation
Summary Evaluation
Certification Criteria MACTEC-ERS
U.S. Department
of Energy (DOE)
Ra-226 is ^ 5 pCi/g above
background in top 15-cm-thick layer of
soil, averaged over 100 m2
In situ [X] Lab [ ]
Ra-226 is ^ 15 pCi/g above
background in any 15-cm-thick layer
of soil more than 15 cm below the
surface, averaged over 100 m2.
In situ [ ]Lab[X]
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 WL or, at
most, 0.03 WL.
Supplemental standards were applied
in accordance with EPA standard
40 CFR 192.21.
Hot spot criteria met as outlined by
DOE guidelines for FUSRAP (Rev.2,
March 1987)
Yes No Not Taken Yes No Not Taken
[X]a [ ]
[X] [ ]
[X] [ ]
[X] [ ]
[ ] [X]
[X] [ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[XI [ 1
IX] [ ]
[X] [ ]
[ ] [>J
ty» r ]
[ ]
[ ]
[ ]
[ ] [ ]
[ }
[ ]
aThe excavations were backfilled with materials that were measured at the source indicating 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.
Ill
SFCERTIFED
II
SFMS-09851
1 of 2
DOE ID No.: MS-00535-RS
MACTEC-ERS Recommendation
On the basis of the Property Completion Report evaluation, this property is recommended for
[X] Certification by DOE.
[ ] Certification by DOE with the concurrence of the U.S. Nuclear Regulatory Commission
because supplemental standards were applied according to 40 CFR 192.21.
Manager, Monticello Programs
MACTEC-ERS
DOE Evaluation
On the basis of the Property Completion Report recommendation, this property
[ X] Should be certified by DOE.
[ ] Should be certified by DOE with the concurrence of the U.S. Nuclear Regulatory
Cornrnission because supplemental standards were applied according to 40 CFR 192.21.
U.S. Department of Energy
Work performed under DOE Contract No. DE-AC13-96GJ87335, Task Order No. 96-05.02.14
2 of 2
r
Monticello Vicinity Properties Project
Property Completion Report
for
Monticello
Vicinity Property Remedial Action
for
DOE ID No.: MS-00535-RS
Address: 117 North First West Street
Monticello, Utah 84535
February 1997
Prepared for
U.S. Department of Energy
Albuquerque Operations Office
Grand Junction Office
Prepared by
MACTEC-Environmental Restoration Services, LLC (MACTEC-ERS)*
Grand Junction, Colorado
Y//A ,
Michael C. Butherus (^
Manager, Monticello Programs
Work performed under DOE Contract No. DE-AC 13-96GJ87335
Task Order No. 96-05.02.14
*MACTEC-ERS has been granted authorization to conduct remedial action by the U.S. Department of Energy.
Remedial action was performed 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, Subpart B; and "Implementation," in 40 CFR 192, Subpart C, and the U.S. Department of
Energy Formerly Utilized Sites Remedial Action Program hot spot criteria.
DOE ID No.: MS-O0535-RS
Contents
Page
1.0 Suinmary 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Remedial Action Summary 2
2.0 Operations Summary 3
2.1 Remedial Action Plan 3
2.2 Assessed and Remediated Contamination 3
3.0 Verification Summary 4
3.1 Radiological Survey Data 4
3.1.1 Preremedial Action Survey 4
3.1.2 Postexcavation Survey 4
3.1.3 Radon Decay-Product Concentration Measurements 4
3.2 Recommendation for Certification 5
Table
Table 1. Certification Data Surnmary 5
Appendix
Appendix A. Radiological Conditions A-1
DOE/Grand Junction Office MVP Property Completion Report
February 1997 Page ii
DOE ID No.: MS-00535-RS
1.0 Summary
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was established to reduce the potential hazard
to the public due to long-term exposure to low-level radioactivity associated with the off-site 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 process both uranium and
vanadium ore. 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 U.S. Department of Energy (DOE) 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. Cleanup
activities also were conducted to meet the hot spot criteria established by radiological protection
guidelines in the DOE Guidelines for Residual Radioactive Material at Formerly Utilized Sites
Remedial Action Program and Remote Surplus Facilities Management Program Sites
(Revision 2, March 1987).
This property was evaluated on the basis of EPA standards and DOE hot spot criteria and
determined to contain mill tailings (radioactive material) exceeding EPA standards and/or DOE
hot spot criteria. The Remedial Action Contractor* was notified of the inclusion of this property
into the MVP Project and was authorized by DOE to conduct remedial action as required to bring
the property into conformance with EPA standards and DOE hot spot criteria.
The Remedial Action Contractor, MACTEC-ERS, was awarded the U.S. Department of Energy Grand Junction
Office (DOE-GJO) Technical Assistance and Remediation contract and commenced work on September 5, 1996.
The MACTEC-ERS team consists of International Technology Corporation, Science Application International
Corporation, Roy F. Weston, Inc., and Rust Federal Services, Inc. Rust Geotech was the DOE-GJO contractor from
October 1, 1986, through September 4,1996, and implemented some of the tasks discussed in this report.
DOE/Grand Junction Office
February 1997
MVP Property Completion Repon
Page 1
DOE ID No.: MS-00535-RS
1.3 Remedial Action Summary
DOE ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological and Engineering Assessment (REA):
Construction Subcontractor:
Preconstruction Conference Record:
Notice of Final Completion Inspection:
Volume of Material Removed in Cubic Yards (yd3):
Area Cleaned Up in Square Meters (m2):
Property Completion Report Submitted:
MS-00535-RS
Lot 21, Redd and Palmer
Subdivision, Plat C, City of
Monticello, County of San Juan,
State of Utah
117 North First West Street
Monticello, Utah 84535

Residential Simple (RS)
Oak Ridge National Laboratory
Grand Junction Office
January 31, 1991
MACTEC-ERS
February 3,1994
Diamond Back Services, Inc.
August 16, 1994
October 3, 1994
Exterior: 4
Interior: 0
19
February 1997
DOE/Grand Junction Office
February 1997
MVP Property Completion Report
Page 2
DOE ID No.: MS-00535-RS
2.0 Operations Summary
2.1 Remedial Action Plan
The remedial action plan specified removal of radioactive material. Once excavation was
completed, the affected areas were resurveyed for possible remaining 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 before remedial action
activities.
2.2 Assessed and Remediated Contaniination
This property was assessed as part of Block 51, which consists of MS-O0535-RS and
MS-O0566-VL. The total quantity of assessed contamination for Block 51 was 21 yd3. The
radiological assessment identified contamination, 6 inches (in.) deep, within the property
boundary of MS-00535-RS. The remedial action process included removal of approximately
4 yd3 of radioactive material, 6 to 12 in. deep. The areas of assessed and excavated contamination
are shown on Figure A-1.
DOE/Grand Junction Office
February 1997
MVP Property Completion Report
Page 3
DOE ID No.: MS-00535-RS
3.0 Verification Summary
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Preremedial Action Survey
The Remedial Action Contractor conducted a radiological survey during May 1992, as described
in the final REA. Figure A-1 shows the extent of assessed contamination and identifies the areas
recommended for remedial action.
3.1.2 Postexcavation Survey
A scintillometer was used to perform a surface gamma scan after the removal of radioactive
material and before backfilling. Following the gamma scan, soil samples representative of the
6-in.-thick soil layer at the bottom of the excavation were collected. These samples, representing
the verification area, were analyzed for radium-226. The results of the gamma scan and soil
sample analyses are presented in Table A-1. Areas with elevated measurements required further
evaluation for comparison to the EPA standard as described below.
Exterior Findings: Surface exposure-rate values, determined during the gamma scan, ranged from
12 to 32 microroentgens per hour (uR/h), as indicated on Figure A-1. Elevated exposure rates in
assessed Area D were associated with a point source (petrified wood) that was left in place at the
owner's request.
3.1.3 Radon Decay-Product Concentration Measurements
Radon decay-product concentration (RDC) measurements were taken on the lowest habitable
level of the house, as shown on Figure A-1. The measurement results are presented in
Table A-2.
DOE/Grand Junction Office
February 1997
MVP Property Completion Report
Page 4
DOE ID No.: MS^O0535-RS
3.2 Recommendation for Certification
Radioactive materials have been removed from this property to the extent required by EPA
standards (40 CFR 192, Subparts B and C) and DOE hot spot criteria, as indicated in the
Certification Data Summary (Table 1). Therefore, the property located at 117 North First West
Street, in Monticello, Utah, is recommended for certification as required by DOE guidelines.
Table 1. Certification Data Summary
Applicability Standard Survey Results
Radium-226
Concentration in
Surface Soil
Radium-226
Concentration in
Subsurface Soil
Exposure Rate
Land
Shall not exceed 5 pCi/g above
background* in the 15-cm-thick
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.
Habitable Structures
< 5 pCi/g above background on the
basis of gamma exposure rates that do
not exceed 30 percent above normal
background."
Soil sample result was 4.8 pCi/g.b
Shall not exceed 20 uR/h
above background.0
Range for the ground floor was 12 to
15uR/h.
Radon Decay-
Product
Concentration
Annual average shall not
exceed 0.02 WL, to the extent
practicable, and shall in no
case exceed 0.03 WL.
Annual average was 0.0103 WL.
Key: cm = centimeters; m2 = square meters; pCi/g = picocuries per gram; uR/h = microroentgens per hour;
WL = working level
aThe background radium-226 concentration for Monticello Vicinity Properties is approximately 2.0 pCi/g.
""The hot spot criteria were met based on gamma scans and/or soil sample results.
'The background exposure rate for this property is approximately 12 uR/h.
DOE/Grand Junction Office
February 1997
MVP Property Completion Report
Page 5
DOE ID No.: MS-00535-RS
Appendix A
Radiological Conditions
Table A-1. Postexcavation Survey Results
Table A-2. Radon Decay-Product Concentration Measurement Results
Figure A-1. Radiological As-Built
DOE ID No.: MS-O0535-RS
Table A-1. Postexcavation Survey Results
Gamma Radium-226
Verification Exposure Rate Soil Sample Measurement Concentration
Area* Range (uR/h) Ticket No. Method (pCi/g)
V-1 15-19 NCA 962 OCS 4.8
Key: OCS = opposed crystal system; pCi/g = picocuries per gram; uR/h = microroentgens per hour;
V = verification area
"See Figure A-1 for location of verification area.
DOE/Grand Junction Office
February 1997
MVP Property Completion Report
Page A-2
DOE ID No.: MS-00535-RS
Table A-2. Radon Decay-Product Concentration Measurement Results*
Detector"
Number Start Date End Date
Radon
Concentration
(PCi/L) WL
3851669
3851693
3851557
10-27-94
10-27-94
10-27-94
09-28-95
09-28-95
09-28-95
1.97 0.0099
2.13 0.0107
2.05 0.0103
Annual Average: 0.0103
Key: pCi/L = picocuries per liter; WL = working level
aSee Figure A-1 for measurement location.
"Terradex Radtrak Detector.
DOE/Grand Junction Office
February 1997
MVP Properly Completion Report
Page A-3
10
30
12 14 16 18 20 22 24
n—i—i—i—i—i—i—i—i—i—i—i—i—r
26 28 30 32 34 36 38 40
30
28
26
24
22
20
18 -
12-15
GARAGE
12-15
CARPORT
12-15
I
12-15
V-1
6 6XC
V-1
(RDC)
12
r rr ONE STORY
BRICK HOUSE
12-15
32 yuR/h
12-15
UJ
LU
01
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I—
CO
CO
or
o
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rr:.^|
Lv.vj
12-15
12
V-10
(RDC)
LEGEND
ALL DEPTHS/HEIGHTS IN INCHES
ALL EXPOSURE RATES IN /iR/h
ASSESSED AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION AREA IDENTIFIER
RADON DECAY-PRODUCT CONCENTRATION
MEASUREMENT LOCATION
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
POINT SOURCE (PETRIFIED WOOD)
- 28
26
24
22
- 20
18
16 1 6
1 4
777-/// /// T7T
WEST FIRST NORTH STREET
THIS DRAWING 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.
1 4
12 -
Y
10
10
SCALE IN FEET
M:\FAS\033\0003\RM00535V 02/05/97 09:53am S50730
12 1 4 16 18
20 10 0
20
20
22
40
J L
24
O
NORTH
76
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION OFFICE. COLORADO
117 NORTH
FIRST WEST STREET
MONTICELLO. UTAH
mmsa
COMPLETION REPORTS
£2_
MONTICELLO VICINITY PROPERTIES
FIGURE A-1
RADIOLOGICAL AS-BUILT
""MS-00535-RS
7>C)
FAS-033-0003-RM00535V
7 C
1 1
1 2
10
OAK RIDGE NATIONAL LABORATORY PHONE: (970)24M200
FAX: (970)248^6207 MANAGED BY LOCKHEED MARTIN ENERGY RESEARCH CORPORATION
FOR THE U.S. DEPARTMENT OF ENERGY
2597 BV. Road
GRAND JUNCTION, COLORADO 81503 MAR 3 l 1997
Ms. Mary Ann Rondinella
Project Coordinator, Monticello Projects
U.S. Department of Energy
P. O. Box 2567
Grand Junction, Colorado 81502
Dear Ms. Rondinella:
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 ofthe 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 rates at
this property.
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:
MS00535-RS
117 North 1st West Street
Monticello. Utah 84535
Property Owner:
Owner Address:

Tenant Name: Same
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
117 NORTH 1ST WEST STREET
MONTICELLO, UTAH (MS00535-RS)
A. R. Jones
March 1997
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81503
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 3
CONCLUSION 3
REFERENCES 6
iii
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 the
analysis of soil samples and technical review and M. T. Muck for technical review.
vii
ABSTRACT
In 1980, the site of a vanadium and uranium mill at Monticello, Utah, was accepted into the
U.S. Department of Energy (DOE) 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
1994, the Remedial Action Contractor (RAC) designated by DOE, performed remedial action on the
vicinity property at 117 North 1st 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
1
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT 117 NORTH 1ST WEST STREET
MONTICELLO, UTAH (MS00535-RS)*
INTRODUCTION
The rnill at Monticello, Utah, was built in 1942 by the United States (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. Vana-
dium 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 de-
commissioning 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
ofthe 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 (US DOE 1990b).
*The verification of remedial action was performed by members ofthe Environmental Assessment Group in the Environmental
Technology Section of the Health Sciences Research Division at Oak Ridge National Laboratory under DOE contract DE-AC05-
960R22464 with Lockheed Martin Energy Research Corporation.
2
During 1994, the Remedial Action Contractor (RAC) designated by DOE, performed remedial
action on the vicinity property that is the subject of this report, a single family residence located at
117 North 1st 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 (MACTEC-
ERS 1997).
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 Environ-
mental Technology Section (ETS) of Oak Ridge National Laboratory (ORNL) has been assigned the
responsibility of this task at the 117 North 1st 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 (US DOE 1990a).
Document Reviews
Review of the RAC property completion report (MACTEC-ERS 1997) indicates the property
was remediated as evaluated by DOE on the basis of U.S. Environmental Protection Agency
standards and the DOE guidelines (US DOE 1990a). Excess residual radioactive materials were
present, thus it was appropriate to designate this property for remedial action.
This property was assessed as part of Block 51, therefore, the quantity of material assessed is
not available. During the actual removal process, a total of 4 yd3 of contaminated earth and material,
6 to 12 inches deep, were removed from a 19 m2 area.
The RAC performed a post-excavation survey prior to backfilling the excavated areas. This
survey consisted of gamma scans with a scintillometer of the ground level of the structure, a surface
scan ofthe exterior, and soil sampling. Samples representative of the bottom 15-cm (6-in.) soil layers
ofthe excavated verification areas were collected and blended to form a representative composite soil
sample.
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 radionu-
clide concentrations in soil samples. Applicable DOE guidelines for protection against radiation are
given in Table 1.
Gamma Measurements
Gamma exposure rate measurements taken by the RAC at the ground-level of the residence
ranged from 12 to 15 uR/h. Exterior surface gamma measurements taken from the excavated areas
prior to backfilling ranged from 15 to 19 uR/h. A petrified wood point source measuring 32 uR/h
was left on the property at the owner's request.
Soil Sample Analysis
Prior to backfilling, the RAC collected soil samples representative ofthe 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. The RAC's analysis of this sample
showed a 226Ra concentration of 4.8 pCi/g. ORNL ETS obtained this sample and performed a
confirmatory analysis which showed a 226Ra concentration of 4.5 pCi/g. These values are below the
DOE guideline value of 15 pCi/g for soil layers > 15 cm below the surface. Results of the RAC and
ORNL soil sample analyses are given in Table 2. Gamma ranges and/or soil sample results
demonstrate compliance to the DOE Hot Spot Guideline for areas <25 m2 (Table 1).
Radon Measurement Results
Radon decay-product concentration (RDC) measurements for this site were determined before
remedial action by the Alpha-track method. To monitor radon levels, the RAC placed three alpha-
track detectors on the ground floor of the residence located on this property for a period of
approximately one year (from October 27, 1994 to September 28, 1995). The average annual
working level (WL) of radon progeny concentration, as determined by the Tech./Ops-Laiidauer
Corporation, was 0.0103, which is well below the 0.03-WL guideline given in Table 1.
CONCLUSION
Results of RAC 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 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.
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 radionu-
clide concentrations in soil samples. Applicable DOE guidelines for protection against radiation are
given in Table 1.
Gamma Measurements
Gamma exposure rate measurements taken by the RAC at the ground-level of the residence
ranged from 12 to 15 p.R/h. Exterior surface gamma measurements taken from the excavated areas
prior to backfilling ranged from 15 to 19 uR/h. A petrified wood point source measuring 32 uR/h
was left on the property at the owner's request.
Soil Sample Analysis
Prior to backfilling, the RAC 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. The RAC's analysis of this sample
showed a 226Ra concentration of 4.8 pCi/g. ORNL ETS obtained this sample and performed a
confirmatory analysis which showed a 226Ra concentration of pCi/g. These values are below
the DOE guideline value of 15 pCi/g for soil layers > 15 cm below the surface. Results of the RAC
and ORNL soil sample analyses are given in Table 2. Gamma ranges and/or soil sample results
demonstrate compliance to the DOE Hot Spot Guideline for areas <25 m2 (Table 1).
Radon Measurement Results
Radon decay-product concentration (RDC) measurements for this site were determined before
remedial action by the Alpha-track method. To monitor radon levels, the RAC placed three alpha-
track detectors on the ground floor of the residence located on this property for a period of
approximately one year (from October 27, 1994 to September 28, 1995). The average annual
working level (WL) of radon progeny concentration, as determined by the Tech./Ops-Landauer
Corporation, was 0.0103, which is well below the 0.03-WL guideline given in Table 1.
CONCLUSION
Results of RAC 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 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
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 averaged 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
progeny concentration
(including background)
Ra226 concentrations, in any surface
or subsurface area less than 25 m2,
is below the guideline by a factor of
(lOO/A)1'*, where A is the area of the
elevated region
0.03 WL
(US DOE 1990a)
5
Table 2. Results of ORNL analysis ofthe RAC soil samples from
117 North 1st West Street, Monticello, Utah (MS00535-RS)
^Ra concentration (pCi/g)
ORNL RAC
sample sample Depth
No.a No^ (cm) ORNL RAC
XI NCA 962 >15 4.5 4.8
" 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 the RAC, and these samples were blended to form a composite soil sample, which
represents an average over one of the verification areas.
6
REFERENCES
MACTEC-ERS 1997. Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00535-RS, Address: 117 North First West Street, Monticello, Utah
84535, MACTEC-Environmental Restoration Services, Grand Junction, Colorado, February 1997.
ORNL 1993. Environmental Technology Section (Formerly Pollutant Assessment Group)
Procedures Manual. ORNL 6645/R2, September 1993. Oak Ridge National Laboratory, Grand
Junction, Colorado.
US 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.
US 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.
DOE ID No.: MS-00566-VL
Property Address: Parcel No. A0014000004A, North Second West Street
Vicinity Property Certification Summary and Recommendation
Summary Evaluation
U.S. Department
Certification Criteria MACTEC-ERS of Energy (DOE)
Yes No Not Taken Yes No Not Taken
Ra-226 is <: 5 pCi/g above
background in top 15-cm-thick layer
of soil, averaged over 100 m2.
In situ [X] Lab [ ] PT I I [ I W M M
Ra-226 is * 15 pCi/g above
background in any 15-cm-thick layer
of soil more than 15 cm below the
surface, averaged over 100 m2.
In situ [ ] Lab [XJ [X] [ ] [ ] [fl [ ] [ ]
Interior gamma is s 20 uR/h above
background in any occupied or
habitable structure. [ ] [ ] [X]b [ ] [ ] [)<]
The radon decay-product
concentration in any occupied or
habitable structure is <. 0.02 WL or, at
most, 0.03 WL. MM [X]b [ ] [ ] [M
Supplemental standards were applied
in accordance with EPA standard
40 CFR 192.21. [ ] [X] [ ] M IX) II
Hot spot criteria met as outlined by
DOE guidelines for FUSRAP (Rev.2,
March 1987). MM M VA [ 1 M
The excavations were backfilled with materials that were measured at the source indicating 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.
'Vacant lot.
1 of 2
DOE ID No.: MS-00566-VL
MACTEC-ERS Recommendation
On the basis of the Property Completion Report evaluation, this property is recommended for
[X] Certification by DOE.
[ ] Certification by DOE with the concurrence of the U.S. Nuclear Regulatory Commission
because supplemental standards were applied according to 40 CFR 192.21.
Manager, Monticello Program
MACTEC-ERS
DOE Evaluation
On the basis of the Property Completion Report recommendation, this property
[X] Should be certified by DOE.
[ ] Should be certified by DOE with the concurrence of the U.S. Nuclear Regulatory
Commission because supplemental standards were applied according to 40 CFR 192.21.
U.S. Department of Energy
Work performed under DOE Contract No. DE-AC13-96GJ87335, Task Order No. 96-05.02.14
2 Of 2
Monticello Vicinity Properties Project
Property Completion Report
for
Monticello
Vicinity Property Remedial Action
for
DOE ID No.: MS-00566-VL
Address: Parcel No. A0014000004A,
North Second West Street
Monticello, Utah 84535
April 1997
Prepared for
U.S. Department of Energy
Albuquerque Operations Office
Grand Junction Office
Prepared by
MACTEC-Environmental Restoration Services, LLC (MACTEC-ERS)*
Grand Junction, Colorado
{^^^^^ (
Michael C. Butherus
Manager, Monticello Program
Work performed under DOE Contract No. DE-AC13-96GJ87335
Task Order No. 96-05.02.14
'MACTEC-ERS has been granted authorization to conduct remedial action by the U.S. Department of Energy.
Remedial action was performed 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, Subpart B; and "Implementation," in 40 CFR 192, Subpart C, and the U.S. Department of
Energy Formerly Utilized Sites Remedial Action Program hot spot criteria.
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-00566-VL
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was established to reduce
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 U.S. Department of Energy (DOE) 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.
Cleanup activities also were conducted to meet the hot spot criteria
established by radiological protection guidelines in the DOE "Guidelines for
Residual Radioactive Material at Formerly Utilized Sites Remedial Action
Program and Remote Surplus Facilities Management Program Sites"
(Revision 2, March 1987).
This property was evaluated on the basis of the EPA standards and the
DOE hot spot criteria by the DOE Inclusion Survey Contractor. The DOE
reviewed these evaluation results and determined that the property
contained mill tailings (residual radioactive material) exceeding the DOE hot
spot criteria. The Remedial Action Contractor was notified of the inclusion
of this property into the MVP Project and was authorized by the DOE to
conduct remedial action as required to bring the property into conformance
with the EPA standards and the DOE hot spot criteria.
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-00566-VL
MS-00566-VL
Beginning at a point 592.5 feet north of
S4 corner of Section 25, T33S., R23E., Salt
Lake Base Meridian; north 93 feet, west
120 feet, south 93 feet, east 120 feet to
the point of beginning, City of Monticello,
County of San Juan, State of Utah
Parcel No. A0014000004A
North Second West Street
Monticello, Utah 84535

Vacant Lot (VL)
Oak Ridge National Laboratory
August 30, 1991
Rust Geotech
February 3, 1994
Diamond Back Services, Inc.
9861 Titan Park Circle
Littleton, Colorado
August 16, 1994
September 28, 1994
Interior: 0 cubic yards
Exterior: 5 cubic yards
17 square meters (m2)
September 1995
2
DOE ID No.: MS-00566-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 to
12 inches deep, within the property. The quantity of contamination for
this property was not specified because it was assessed as part of Block
MS-09051-BK. The remedial action process included the removal of
approximately 5 cubic yards of residual radioactive material, ranging from 6
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-00566-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 the Remedial Action
Contractor during May 1992, as described in the final REA dated
February 1994. 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 to 21 //R/h (Appendix Figure 2.1).
The result of analysis for radium-226 in one composite soil sample
was 7.7 picocuries per gram (pCi/g), as indicated in Appendix
Table 3.1.
4
DOE ID No.: MS-00566-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)
and the DOE hot spot criteria, as indicated in the Certification Data
Summary below.
Therefore, the property located at Parcel No. A0014000004A, North
Second West Street, in Monticello, Utah, is recommended for
certification as required by the DOE guidelines, and the appropriate
records should be documented.
Certification Data Summary
Applicability Standards Survey Results
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
Shall not exceed 20 /sR/h
above background.
Annual average shall not
exceed 0.02 WL, to the
extent practicable, and
in no case shall exceed
0.03 WL.
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.
Not applicable: vacant lot.
Not applicable: vacant lot.
<5.0 pCi/g above
background.
Soil sample result was
7.7 pCi/g.*
*The background radium-226 concentration is approximately 2.0 pCi/g.
The hot spot criteria were met based on gamma scans and/or soil sample results.
5
DOE ID No.: MS-00566-VL
4.0 APPENDIX
Appendix Tables:
Table 3.1 Post-Excavation Sample/Measurement Results
Appendix Figure:
Figure 2.1 Exterior Extent of Contamination - RADIOLOGICAL
AS-BUILT
DAG:05-03-95
MS-00566.VL WP52
REV053193
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00566-VL
Address: Parcel No. A0014000004A, North Second West Street, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range OvR/h) Ticket No. Method* (pCi/g)
V-1 16-21 NCA 961 OCS 7.7
See Appendix Figure 2.1 for the verification area.
aOCS = Opposed Crystal System
7
DOE ID No.: MS-00566-VL
Property Address: Parcel No. A0014000004A, North Second West Street
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
Rust Geotech of Energy (PQE)
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 [ ] Lab [X]
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] [ ] [ ] [ ]
(Vacant Lot)
The radon decay-product
concentration in any
occupied or habitable
structure is <. 0.02
working level or, at
most, 0.03 working level. [ ] [ ] [X] [ ] f ] [ ]
(Vacant Lot)
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21. [ ] [X] [ ] [ ] [ ] [ ]
Hot spot criteria met as
outlined by the DOE
guidelines for FUSRAP
(Rev. 2, March 1987). [X] [ ] [ ] [ ] [ ] [ ]
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.
DOE ID No.: MS-00566-VL
RUST GEOTECH RECOMMENDATION
Based on the Rust evaluation, I recommend this property for:
[X] Certification by the U.S. Department of Energy.
[ ] Certification by the U.S. Department of Energy with application of
supplemental standards per 40 CFR 192.21.
Wanda S. Busby Date
Manager, Monticello Programs
Rust Geotech
DOE EVALUATION
[ ] Should be certified by the U.S. Department of Energy.
[ ] Should be certified by the U.S. Department of Energy with application of
supplemental standards per 40 CFR 192.21.
Certification Official
Date
U.S. Department of Energy
10
30
12 14
n r
16 18 20 22 24 26 28 30 32 34 36 38 40
30
28 - 28
26
24
22
20
18
oc
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12
V-1 12-15
16-21
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rv.-.vi
[V.VJ
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
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
26
24
22
20
18
16
14
12
Y
10
SCALE IN FEET
20 10 0 20 40
M:\FAS\033\0003\RM00566V 03/08/96 1:13pni T50780
X
I I
NORTH
J I
THIS DRAWING 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-RESIDENCE -yAN-HRS./WK.
INSTRUMENT NO.
VERIFICATION
CK. A.E, APP. NO. DATE
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE, COLORADO
PARCEL NO. A0014000004A
NORTH SECOND WEST STREET
MONTICELLO, UTAH
APPROVAL
Rust Oeotech
"BATT APPROVAL OOE "BATT
DOEIDNO. MS-00566-VL
DWO.NO. 3-BQQ566-V1 8HT. 1 OF 1
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 PHONE: pro) 24M200
MAMftOCP BV LOCKHEED MMIB< EHEHa'1' HEJEHWU I lUWPCTWHOH • •- -—— — PWC'^OJ 2Waifli
FOR THE U.S. DEPARTMENT OF ENERGY
POST OFFICE BOX 2507 UAV 3 I ]QUg
GRANO JUNCTION, COLORADO 81503 1 ww
Ms. Mary Ann Rondinella
Project Coordinator, Monticello Projects
U.S. Department of Energy
P. O. Box 2567
Grand Junction, Colorado 81502
Dear Ms. Rondinella:
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 n6Ra concentration in the soil at this property, «"
i
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: MS00566-VL
Location Address: AOQ14000004A 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 A INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION AT
A0014000004A NORTH 2ND WEST STREET
MONTICELLO, UTAH (MS00566-VL)
J. R. Sauvage
May 1996
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
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 v 2
VERIFICATION OF REMEDIAL ACTION 3
Gamma Measurements 3
Soil Sample Analysis 3
Radon Measurement Results 3
CONCLUSION »r 3
REFERENCES 6
iii
1. Applicable guidelines for protection against radiation 4
2. Results of ORNL analysis of Geotech soil samples from Parcel No. A0014000004A -
North 2nd West Street, Monticello, Utah (MS00566-VL) 5
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. J. Wilson-Nichols 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 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 1994, RUST Geotech, the
remedial action contractor designated by DOE, performed remedial action on the vicinity
property at Parcel No. A0014000004A - 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. 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
~~ ' •" i"~
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT PARCEL NO. A0014000004A NORTH 2ND WEST STREET
MONTICELLO, UTAH (MS00566-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 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
native grasses. During 1974 and 1975, the ore stockpiles were rernoved 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 miH'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 contarnination. 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
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 (U.S. DOE 1990b).
*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-AC05-96OR22464 with Lockheed Martin Energy Research Corporation.
During 1994, 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 Parcel No. A0014000004A - North 2nd West Street,
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 1994).
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 Parcel No.
A0014000004A - North 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 1990a).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1995)
indicates 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 using streamlined remedial action procedures.
This property was assessed as part of Block 51, therefore, the quantity of material
assessed is not available. During the actual removal process, a total of 5 yd3 of contami-
nated earth and uranium mill tailings, 6 to 12 inches deep was removed from a 17 m2 area.
A post-excavation survey was performed by Geotech prior to backfilling the exca-
vated areas. This survey consisted of a gamma scan with a scintillometer of the exterior
and soil sampling. Samples representative of the bottom 15-cm (6-in.) soil layers of one
excavated verification 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 sub-
tracted 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 16 to 21 uR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected soil samples representative of the excavated
area 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 one exterior verification area.
Geotech's analysis of this sample showed a ^Ra concentration of 7.7 pCi/g. ORNL ETS
obtained this sample and performed a confirmatory analysis which showed a ^'Ra concen-
tration of 8.5 pCi/g. These values are below the EPA^tandard value of 15 pCi/g for soil
layers > 15 cm below the surface. Gamma ranges and/or soil sample results demonstrate
compliance to the DOE" Hot Spot Guidelit^S for areas <25 m2 (Table 1). Results of
Geotech and ORNL soil sample analyses are given in Table 2.
Radon Measurement Results
Radon decay-product concentration (RDC) measurements were not taken at this site.
There are no structures on this property.
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 veri-
fication 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 as discussed in meetings between Geotech and ORNL on February
28, 1996 and on April 15, 1996. 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
Radionuclide
concentrations in soil
for Hot Spot areas
Exposure to 222Rn
progeny
Maximum Permissible
concentration of Ra226 in soil
above background level, for
areas less than 25 m2
Average annual radon proge-
ny concentrati6^(including
background)
Rar* 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)
Table 2. Results of ORNL analysis of Geotech soil samples from
Parcel No. A0014000004A - North 2nd West Street, Monticello Utah (MS00566-VL)
226Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No* No.* {cm}
XI NCA961 >15 8.5 7.7
" An X-type sample is a split of the sample taken by the remedial action contractor.
6 Soil samples representative ofthe bottom 15-cm (6-in.) soil layers ofthe 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
Geotech 1995. Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00566-VL, Address: Parcel No. A0014000004A - North 2nd
West Street, Monticello, Utah 84535, Geotech, Grand Junction, Colorado, September
1995.
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.
i
DOE ID No.: MS-00623-RS
Property Address: 565 Circle Drive
Vicinity Property Certification Summary and Recommendation
Summary Evaluation
Certification Criteria MACTEC-ERS
U.S. Department
of Energy (DOE)
Ra-226 is <: 5 pCi/g above
background in top 15-cm-thick layer
of soil, averaged over 100 m2.
In situ [X] Lab [ ]
Ra-226 is ^ 15 pCi/g above
background in any 15-cm-thick layer
of soil more than 15 cm below the
surface, averaged over 100 m2.
In situ [ ]Lab[X]
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 s 0.02 WL or, at
most, 0.03 WL.
Supplemental standards were applied
in accordance with EPA standard
40 CFR 192.21.
Hot spot criteria met as outlined by
DOE guidelines for FUSRAP (Rev.2,
March 1987).
Yes No Not Taken Yes No Not Taken
[X]' [ ]
[X] [ ]
[X] [ ]
[X] [ ]
[ ] [X]
[X] [ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
pr] [ ]
[X] [ ]
IX] [ ]
[Yl [ ]
t ] M
M [ ]
[ ]
[ ]
[ ]
[ ]
[ I
[ ]
"The excavations were backfilled with materials that were measured at the source indicating 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.
1 of 2
DOE ID No.: MS-O0623-RS
MACTEC-ERS Recommendation
On the basis of the Property Completion Report evaluation, this property is recommended for
[X] Certification by DOE.
[ ] Certification by DOE with the concurrence of the U.S. Nuclear Regulatory Commission
because supplemental standards were applied according to 40 CFR 192.21.
__ ^ 7
DOE Evaluation
On the basis of the Property Completion Report recommendation, this property
[*] Should be certified by DOE.
[ ] Should be certified by DOE with the concurrence of the U.S. Nuclear Regulatory
Commission because supplemental standards were applied according to 40 CFR 192.21.
Date
Work performed under DOE Contract No. DE-AC 13-96GJ87335, Task Order No. 96-05.02.14
'JA
Michael C. Butherus
Manager, Monticello Program
MACTEC-ERS
Cemfication Official
U.S. Department of Energy
2 of 2
Monticello Vicinity Properties Project
Property Completion Report
for
Monticello
Vicinity Property Remedial Action
for
DOE ID No.: MS-00623-RS
Address: 565 Circle Drive
Monticello, Utah 84535
April 1997
Prepared for
U.S. Department of Energy
Albuquerque Operations Office
Grand Junction Office
Prepared by
MACTEC-Environmental Restoration Services, LLC (MACTEC-ERS)*
Grand Junction, Colorado
Michael C. Butherus
Manager, Monticello Program
Work performed under DOE Contract No. DE-AC 13-96GJ87335
Task Order No. 96-05.02.14
•MACTEC-ERS has been granted authorization to conduct remedial action by the U.S. Department of Energy.
Remedial action was performed 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, Subpart B; and "Implementation," in 40 CFR 192, Subpart C, and the U.S. Department of
Energy Formerly Utilized Sites Remedial Action Program hot spot criteria.
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-00623-RS
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was established to reduce
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 U.S. Department of Energy (DOE) 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.
Cleanup activities also were conducted to meet the hot spot criteria
established by radiological protection guidelines in the DOE "Guidelines for
Residual Radioactive Material at Formerly Utilized Sites Remedial Action
Program and Remote Surplus Facilities Management Program Sites"
(Revision 2, March 1987).
This property was evaluated on the basis of EPA standards and DOE hot
spot criteria by the DOE Inclusion Survey Contractor. DOE reviewed these
evaluation results and determined that the property contained mill tailings
(residual radioactive material) exceeding EPA standards and DOE hot spot
criteria. The Remedial Action Contractor was notified of the inclusion of
this property into the MVP Project and was authorized by DOE to conduct
remedial action as required to bring the property into conformance with
EPA standards and DOE hot spot criteria.
1
DOE ID No.: MS-00623-RS
.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-00623-RS
Lot 16, Upper Townsite Subdivision, City of
Monticello, County of San Juan, State of
Utah
565 Circle Drive
Monticello, Utah 84535

Residential Simple (RS)
Oak Ridge National Laboratory
May 24, 1991
Rust Geotech
September 9, 1994
Diamond Back Services, Inc.
9861 Titan Park Circle
Littleton, Colorado
May 22, 1995
June 28, 1995
Interior: 0 cubic yards
Exterior: 3 cubic yards
8 square meters (m2)
March 1996
DOE ID No.: MS-00623-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 3 to
6 inches deep, within the property. The quantity of contamination for this
property was not specified because it was assessed as part of Group 3.
The remedial action process included the removal of approximately 3 cubic
yards of residual radioactive material, ranging from 6 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-00623-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 the Remedial Action
Contractor during May 1992, as described in the final REA dated
September 1994. 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 to 20 microroentgens per
hour (//R/h), as indicated on Appendix Figure 2.1. The results of
analyses for radium-226 in three composite soil samples ranged
from 2.0 to 6.0 picocuries per gram (pCi/g), as indicated in
Appendix Table 3.1.
3.1.3 Radon Decay-Product Concentration (RDC) Measurement
Based on the DOE-approved abbreviated-measurement method, the
RDC was 0.0068 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). RDC measurements were taken before remediation of
the property.
4
DOE ID No.: MS-00623-RS
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by EPA standards (40 CFR 192.12, 192.20-23) and
DOE hot spot criteria, as indicated in the Certification Data Summary
below.
Therefore, the property located at 565 Circle Drive, in Monticello, Utah,
is recommended for certification as required by DOE 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 to 14 //R/h.
Average was 0.0068 WL,
based on the DOE-
approved abbreviated-
measurement method.
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 to 6.0 pCi/g.**
*The background exposure rate is approximately 12//R/h.
The background radium-226 concentration is approximately 2.0 pCi/g.
* *The hot spot criteria were met based on gamma scans and/or soil sample results.
5
DOE ID No.: MS-00623-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
SJW:09-07-95
MS-00623.RS WP61
REV080195
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00623-RS
Address: 565 Circle Drive, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range (//R/h) Ticket No. Method" (pCi/g)
V-1 16-19 NCJ 024 OCS 2.0
V-2 16-20 NCJ 025 OCS 6.0
V-3 15-20 NCJ 027 OCS 4.0
See Appendix Figure 2.1 for the verification areas.
"OCS = Opposed Crystal System
7
Table 3.2
Radon Decay-Product Concentration Measurement Results
DOE ID No.: MS-00623-RS
Address: 565 Circle Drive, Monticello, Utah
Instrument Type: Landauer Radtrak Detector
Radon
Detector Tracks Per Concentration Working
Number Start Date End Date mm2 (pCi/L) Level
3964223 03-02-95 06-12-95
3964272 03-02-95 06-12-95
3964324 03-02-95 06-12-95
3.6 1.23 0.0062
4.6 1.58 0.0079
3.7 1.27 0.0064
Average: 0.0068
See Appendix Figure 2.1 for the measurement location.
8
DOE ID No.: MS-00623-RS
Property Address: 565 Circle Drive
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
U.S. Department
Rust Geotech of Energy (DQE)
Ra-226 is s 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 I ] 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 DOE
guidelines for FUSRAP
(Rev. 2, March 1987).
YES NO NOT TAKEN
[X]* [ ] [ ]
[X] [ ] [ ]
[X] [ ] [ ]
[X] [ ] [ ]
[ ] [X] [ ]
[X] [ ] [ ]
YES NO NOT TAKEN
[ ] [ ] [ ]
[ ] I ] [ 1
[ ] [ ] [ ]
[ ] [ ] I ]
[ ] [ ] t 1
[ ] [ 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.
DOE ID No.: MS-00623-RS
RUST GEOTECH RECOMMENDATION
Based on the Rust evaluation, I recommend this property for:
[X] Certification by the U.S. Department of Energy.
[ ] Certification by the U.S. Department of Energy with application of
supplemental standards per 40 CFR 192.21.
Wanda S. Busby Date
Manager, Monticello Programs
Rust Geotech
DOE EVALUATION
[ ] Should be certified by the U.S. Department of Energy.
[ ] Should be certified by the U.S. Department of Energy with application of
supplemental standards per 40 CFR 192.21.
Certification Official
U.S. Department of Energy
Date
42
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
1
12 14 16 18
i—r
20
T
22 24 26 28 30 32 34 36 38 40 42 44 46 48 5<
1
12-16
GARAGE
12-16 3X0 v-2
\A \ 12-15 16-20
\
18
12I6IP
v-i
16-19
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1S-20 RK6 12
ONE STORY
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, SPACE
V 12-14 f. \ \\\
RDC
* \\\
12-16
\
\
0
<D
Lv.vj
12-15
12
V-1
16-17
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
RADON DECAY-PRODUCT CONCENTRATION
MEASUREMENT LOCATION
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
L
SCALE IN FEET
20 10 0 20 40
K:\FA5\0J3\0OO3\SM0OMJV 02/20/»« 12:16pm 150780
J L
12 14 16 18 20
NORTH
I I
22 24 26 28 30
THIS DRAWING 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.
J L
32
J L
34 36 38
RADIOLOGICAL AS-BUILT
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
U.S. OEPARTUENT Or ENERGY
GRAND JUNCTION PROJECTS OTFtCC. COLORADO
565 CIRCLE DRIVE
MONTICELLO. UTAH
MS-00623-RS
C00623-V1
40 42 44 46 48 5C
OAK RIDGE NATIONAL LABORATORY. PHONE; [phone]
TAATBCGEDICI^C^^ " FAX: (970) 24&-6220
FOR THE U.S. DEPARTMENT OF ENERGY
POST OFFICE BOX 2567
GRAND JUNCTION. COLORADO 81502 MAY 3 I I996
Ms. Mary Ann Rondinella
Project Coordinator, Monticello Projects
U.S. Department of Energy
P. O. Box 2567
Grand Junction, Colorado 81502
Dear Ms. Rondinella:
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 rates at this property.
Therefore, this property is recommended for certification by the U.S. Department of Energy.
Sincerely,
Gretchen A. Pierce
MVP/TVC Project Manager
Environmental Assessment Group
Location Number:
Location Address:
Property Owner:
Owner Address:
Tenant Name:
MSQ0623-RS
565 Circle Drive
Monticello. Utah 84535

Same
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
565 CIRCLE DRIVE
MONTICELLO, UTAH (MS00623-RS)
N. F. Kirby
,~aMay 1996
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
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
ACKNOWLEDGMENTS
ABSTRACT
INTRODUCTION
PROCEDURES
Objectives
Document Reviews
VERIFICATION OF REMEDIAL ACTION
Gamma Measurements
Soil Sample Analysis ,
Radon Measurement Results . .*r*....
CONCLUSION **.
REFERENCES
iii
LIST OF TABLES'" "~
1. Applicable guidelines for protection against radiation 4
2. Results of ORNL analysis of Geotech soil samples from 565 Circle Drive,
Monticello, Utah (MS00623-RS) 5
•i
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 technical review and
J. R. Sauvage for technical review.
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 1995, RUST Geotech, the
remedial action contractor designated by DOE, performed remedial action on the vicinity
property at 565 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. 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 565 CIRCLE DRIVE
MONTICELLO, UTAH (MS00623-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 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
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.
V
During the AEC era, the mill proteased approximately one million tons of uranium
ore. Vanadium and uraniurn^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
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 (U.S. DOE 1990b).
*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-AC05-96OR22464 with Lockheed Manin Energy Research Corporation.
2
During 1995, 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 single family residence located at 565 Circle Drive, 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
1996).
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 565 Circle
Drive 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 docu-
mentation 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 1996) 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.
This property was assessed as part of Group 3, therefore, the quantity of material
assessed is not available. During the actual removal process, a total of 3 yd3 of con-
taminated earth and uranium mill tailings, 6 to 18 inches deep, were removed from a
8 m2 area.
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 ofthe structure, a surface scan ofthe exterior, and soil sampling. Samples
representative of the bottom 15-cm (6-in.) soil layers of three 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
residence ranged from 12 to 14 uR/h. Exterior surface gamma measurements taken from
the excavated areas prior to backfilling ranged from 15 to 20 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 three exterior verification
areas. Geotech's analysis of these samples showed 226Ra concentrations ranging from 2.0
to 6.0 pCi/g in the composite sample. ORNL ETS obtained these samples and performed
a confirmatory analysis which showed526Ra concentrations ranging from 3.1 to 6.1 pCi/g.
These values are below theE?A standard value of 15 pCi/g for soil layers > 15 cm below
the surface. Gamma ranges and/or soil sample results demonstrate compliance to the
DOE Hot Spot Guidelines for areas <25 m2 (Table 1). Results of Geotech and ORNL soil
sample analyses are given in Table 2.
Radon Measurement Results
'4
\
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 three months (from March 2,1995 to June 12,1995). The average
annual working level (WL) of radon progeny concentration, as determined by the
TechVOps-Landauer Corporation, was 0.0068, 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 on 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 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
concentrations in soil
for Hot Spot areas
Exposure to 222Rn
progeny
Maximum Permissible
concentration of Ra226 in soil
above background level, for
areas less than 25 m2
Average annual radon proge-
ny concentration (including
background)
Ra226 concentrations, in any
surface or subsurface area
less than 25 m2, is below the
guideline by a factor of
(1 nO/A)*, where A is the
area of the elevated region
0.03 WL
(DOE 1990a)
5
Table 2. Results of ORNL analysis of Geotech soil samples
from 565 Circle Drive, Monticello Utah (MS00623-RS)
226Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No/ Ocm)
XI NCJ 024 >15 3.2 2.0
X2 NCJ 025 >15 6.1 6.0
X3 NCJ 027 >15 3.1 4.0
° An X-type sample is a split of the sample taken by the remedial action contractor.
v
* Soil samples representative of the btjgom 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'ifn average over one of the verification areas.
REFERENCES
Geotech 1996. Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00623-RS, Address: 565 Circle Drive, Monticello, Utah
84535, Geotech, Grand Junction, Colorado, March 1996 .
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.
v
ri* •
DOE ID No.: MS-00923-VL
Property Address: Parcel No. 33S23E250000, North Highway 191
Vicinity Property Certification Summary and Recommendation
Summary Evaluation
U.S. Department
Certification Criteria MACTEC-ERS of Energy (DOE)
Yes No Not Taken Yes No Not Taken
Ra-226 is <; 5 pCi/g above
background in top 15-cm-thick layer
of soil, averaged over 100 m2.
lnsitu[X]Lab[ ] [X]a [ ] [ ] [X] [ ] [ ]
Ra-226 is * 15 pCi/g above
background in any 15-cm-thick layer
of soil more than 15 cm below the
surface, averaged over 100 m2.
In situ [ ]Lab[X] [X]
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 WL or, at
most, 0.03 WL. [ ]
Supplemental standards were applied
in accordance with EPA standard
40 CFR 192.21. [ ]
Hot spot criteria met as outlined by
DOE guidelines for FUSRAP (Rev.2,
March 1987).
i ] i i m [ ] U
[ ] [X]b [ ] [ ] [>3
[ ] [X]b [ ] [ ] [^
[X] [ ] I ] [tf [ ]
[X] [ ] [ ] [y] [ ] [ ]
"The excavations were backfilled with materials that were measured at the source indicating 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.
'Vacant lot.
1 of 2
DOE ID No.: MS-00923-VL
MACTEC-ERS Recommendation
On the basis of the Property Completion Report evaluation, this property is recommended for
[X] Certification by DOE.
[ ] Certification by DOE with the concurrence of the U.S. Nuclear Regulatory Commission
because supplemental standards were applied according to 40 CFR 192.21.
Manager, Monticello Program
MACTEC-ERS
DOE Evaluation
On the basis of the Property Completion Report recommendation, this property
[ y/] Should be certified by DOE.
[ ] Should be certified by DOE with the concurrence of the U.S. Nuclear Regulatory
Commission because supplemental standards were applied according to 40 CFR 192.21.
Date 7 7
U.S. Department of Energy
Work performed under DOE Contract No. DE-AC13-96GJ87335, Task Order No. 96-05.02.14
2 of 2
Monticello Vicinity Properties Project
Property Completion Report
for
Monticello
Vicinity Property Remedial Action
for
DOE ID No.: MS-00923-VL
Address: Parcel No. 33S23E250000,
North Highway 191
Monticello, Utah 84535
April 1997 ^
O
Prepared for
U.S. Department of Energy
Albuquerque Operations Office
Grand Junction Office
Prepared by
MACTEC-Environmental Restoration Services, LLC (MACTEC-ERS)*
Grand Junction, Colorado
7±
Michael C. Butherus
Manager, Monticello Program
Work performed under DOE Contract No. DE-AC13-96GJ87335
Task Order No. 96-05.02.14
*MACTEC—ERS has been granted authorization to conduct remedial action by the U.S. Department of Energy.
Remedial action was performed 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, Subpart B; and "Implementation," in 40 CFR 192, Subpart C, and the U.S. Department of
Energy Formerly Utilized Sites Remedial Action Program hot spot criteria.
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 4
2.1 Abstract of Remedial Action Plan 4
2.2 Previously Unidentified Contamination 4
2.3 Unanticipated Items During Remedial Action 4
2.4 Application of Supplemental Standards 4
3.0 VERIFICATION SUMMARY 5
3.1 Radiological Survey Data 5
3.1.1 Pre-Remedial Action Survey 5
3.1.2 Post-Excavation Survey 5
3.2 Recommendation for Certification 6
4.0 APPENDIX 7
DOE ID No.: MS-00923-VL
SUMMARY ~ ~
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was established to reduce
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 U.S. Department of Energy (DOE) 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. Cleanup activities also were conducted to meet the hot spot
criteria established by radiological protection guidelines in the DOE
"Guidelines for Residual Radioactive Material at Formerly Utilized Sites
Remedial Action Program and Remote Surplus Facilities Management
Program Sites" (Revision 2, March 1987).
This property was evaluated on the basis of EPA standards and DOE hot
spot criteria by the DOE inclusion Survey Contractor. DOE reviewed
these evaluation results and determined that the property contained mill
tailings (residual radioactive material) exceeding EPA standards. The
Remedial Action Contractor was notified of the inclusion of this property
into the MVP Project and was authorized by DOE to conduct remedial
action as required to bring the property into conformance with EPA
standards and DOE hot spot criteria.
1
DOE ID No.: MS-00923-VL
•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:
MS-00923-VL
Beginning at the NE corner of the NE4NE4
of Section 25, T33S., R23E., Salt Lake
Base Meridian; south 40 rods, west
40 rods, north 26 rods, west 40 rods, north
6 rods, east 40 rods, north 8 rods, east
40 rods to beginning, City of Monticello,
County of San Juan, State of Utah-
Parcel No. 33S23E250000
North Highway 191
Monticello, Utah 84535

Vacant Lot (VL)
Oak Ridge National Laboratory
September 12, 1991
Rust Geotech
February 9, 1994
Diamond Back Services, Inc.
9861 Titan Park Circle
Littleton, Colorado
July 6, 1994
September 8, 1994
2
DOE ID No.: MS-00923-VL
1.3 Summary of Remedial Action (continued)
Volume of Material Removed: Interior: 0 cubic yards
Exterior: 54 cubic yards
Area Cleaned Up: 191 square meters (m2)
Property Completion Report
Submitted: February 1996
3
DOE ID No.: MS-00923-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 57 cubic yards of contamination,
ranging from 6 to 15 inches deep, within the property. The remedial
action process included the removal of approximately 54 cubic yards of
residual radioactive material, 6 to 15 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.
4
DOE ID No.: MS-00923-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 the Remedial Action
Contractor during June 1992, as described in the final REA dated
February 1994. .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 12 to 18 microroentgens per
hour U/R/h), as indicated on Appendix Figure 2.1. The results of
analyses for radium-226 in three composite soil samples ranged
from 2.2 to 3.8 picocuries per gram (pCi/g), as indicated in
Appendix Table 3.1.
5
DOE ID No.: MS-00923-VL
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by EPA standards {40 CFR 192.12, 192.20-23) and
DOE hot spot criteria, as indicated in the Certification Data Summary
below.
Therefore, the property located at Parcel No. 33S23E250000,
North Highway 191, in Monticello, Utah, is recommended for
certification as required by DOE 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 2.2 to
3.8 pCi/g.
•The background radium-226 concentration is approximately 2.0 pCi/g.
The hot spot criteria were met based on gamma scans and/or soil sample results.
6
DOE ID No.: MS-00923-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
SJW: 10-23-95
MS-00923.VL WP61
REV080195
7
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00923-VL
Address: Parcel No. 33S23E250000, North Highway 191, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range (//R/h) Ticket No. Method* (pCi/g)
V-1 14-17 NCE 784 OCS 2.2
V-2 15-18 NCE 785 OCS 3.8
V-3 15-17 NCE 786 OCS 2.5
See Appendix Figure 2.1 for the verification areas.
•OCS = Opposed Crystal System
8
10
30
28
26
24
22
20
18
16
14
12
10
12 14 16 18 20 22 24 26 28
v-1
14-17
V-2
15-18
V-3
X 15-17
DETAIL A
SCALE IN FEET
20 10 0 20 40
M:\FAS\0J3\0003\RM00923V 10/24/95 1:46pm T50780
NORTH
THIS DRAWING 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.
30 32 34 36 38
LZ
HIGHWAY 191
12-15
3-17 |
l_.
i i
L_\J
SEE DETAIL A
12-16
J
©
12-15
12
v-1
16-17
40
NOT TO SCALE
LEGEND
ALL DEPTHS IN INCHES
ALL EXPOSURE RATES IN /zR/h
ASSESSEC 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
RADIOLOGICAL AS-BUILT
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
RCSIDCNCC-NO. OF OCCUPANTS
NON-RESlDCNCC-UAN-HRS./WK.
(NSTRUUCNT NO.
SURVCT OATC
U.S. DEPARTMENT OF ENERGY
GRANO JUNCTION PROJECTS OFFICE. COLORADO
CKtGKtO
M0J. CNC*.
SUtUiTTCO
DAW
PARCEL NO. 33S23E250000
NORTH HIGHWAY 191
MONTICELLO, UTAH
APPROVAL
RUST Rust Qeotech
AMA1
OAtc I AmovAi oot TOT
oooo-o. MS-00923-VL
0,0.0. 3-B00923-V1 ,Mt 1 v 1
30
28
26
24
22
20
18
1 6
14
1 2
10
10 12 1 4 16 18 20 22 24 26 28 30 32 34 36 38 40
OAK RIDGE NATIONAL LABORATORY PHONE: pro) 24«200
MANAGED BY LOCKHEED MARTIN ENERGY RESEARCH CORPORATION FAX: (970) 24M220
FOR THE U.S. DEPARTMENT OF ENERGY
POST OFFICE BOX 1567 ||IV 9 t Iflfltl
GRAND JUNCTION. COLORADO 81502 WW V I 139V
Ms. Mary Ann Rondinella
Project Coordinator, Monticello Projects
U.S. Department of Energy
P. O. Box 2567
Grand Junction, Colorado 81502
Dear Ms. Rondinella:
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 and field verification.
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. Department of Energy.
Sincerely,
Gretchen A. Pierce
MVP/TVC Project Manager
Environmental Assessment Group
Location Number:
Location Address:
Property Owners:
Owner Address:
MS00923-VT.
Parcel No. 33S23R250000. North Highway 191
Monticello. Utah 84535

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
PARCEL NO. 33S23E250000, NORTH HIGHWAY 191
MONTICELLO, UTAH (MS00923-VL)
A. R. Jones
May 1996
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
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 v
LIST OF FIGURES v
ACKNOWLEDGMENTS vii
ABSTRACT viii
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 Measurement Results 3
ORNL SURVEY RESULTS 6
Gamma Measurements 6
Soil Sample Analysis 6
CONCLUSION 6
REFERENCES 9
ii
LIST OF TABLES
1. Applicable guidelines for protection against radiation 4
2. Results of ORNL and Geotech analyses of soil samples from Parcel No.
33S23E250000, North Highway 191, Monticello, Utah (MS00923-VL) 5
LIST OF FIGURES
1. Property Map 7
2. Property Map (continued) 8
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 M. K. Jensen for analysis of soil samples and technical review and J. R.
Sauvage for technical review.
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 1994, RUST Geotech Inc.,
the remedial action contractor designated by DOE, performed remedial action on the
vicinity property at Parcel No. 33S23E250000, North Highway 191, 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).
viii
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT PARCEL NO. 33S23E250000, NORTH HIGHWAY 191
MONTICELLO, UTAH (MS00923-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 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
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 decornmissioning of government facilities that had been retired
from service but still had radioactive contarnination. 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 (U.S. DOE 1990b).
The verification of remedial action was performed by members of the 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 Corp.
During 1994, 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, vacant land located at Parcel No. 33S23E250000, North Highway 191,
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 1996). 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 Parcel No.
33S23E250000, North Highway 191 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 1990a).
Document Reviews
Review of the property completion report prepared by Geotech (Geotech 1996)
indicates the property was remediated as evaluated by DOE on the basis of
Environmental Protection Agency standards (DOE 1990a) 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 57 yd3 of mill
tailings 6 to 15 inches deep. However, during the actual removal process, a total of 54
yd3 of contaniinated earth and uranium mill tailings, 6 to 15 inches deep, were removed
from a 191 m2 area.
A post-excavation survey was performed by Geotech prior to backfilling of the exca-
vated 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 three
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.
GEOTECH SURVEY RESULTS
Gamma Measurements
Exterior surface gamma exposure rate measurements taken by Geotech from the
excavated areas prior to backfilling ranged from 14 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. These samples were blended to form
composite soil samples representative of an average over the three exterior verification
areas. Geotech's analysis of these samples showed ^Ra concentrations ranging from
2.2 to 3.8 pCi/g in the composite sample. ORNL ETS obtained these soil samples and
performed a confirmatory analysis, which showed 226Ra concentrations ranging from 2.4
to 2.8 pCi/g, These values are below the EPA standard value of 15 pCi/g for soil layers
>15 cm below the surface (Table 1). Gamma ranges and/or soil sample results demon-
strate compliance to the DOE Hot Spot Guideline for areas < 25 m2 (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 not taken
as this property is a vacant lot.
4
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions Guideline value
Radionuclide con-
centrations in soil
Maximum permissible
concentration 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
averaged 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 226Ra in soil
above background level, for
areas less than 25m2.
Average annual radon
progeny concentration
(including background).
Ra226 concentration, in any
surface or subsurface area
less than 25 m2, is below the
guideline of (lOO/A)*,
where A is the area of the
elevated region.
0.03 WL
(DOE 1990a)
5
Table 2. Results of ORNL and Geotech analyses of soil samples from
Parcel No. 33S23E250000, North Highway 191, Monticello, Utah (MS00923-VL)
^Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth
No.a No.* (cm) Confirmatory' ORNL'' Geotech
Xl/Vl NCE 784 >15 2.4 2.0 2.2
X2/V2 NCE 785 >15 2.5 2.4 3.8
X3/V3 NCE 786 >15 2.8 2.4 2.5
" 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 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
(confinnatory).
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 17 uR/h (Figure 1).
Soil Sample Analysis
ORNL sampled all three ofthe 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 composite soil samples representative of an average over
the exterior verification areas. ORNL's analysis of these composite samples showed 226Ra
concentrations of 2.0 to 2.4 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 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.
r
660 FT.
o
co
10
11
SEE
DETAIL! PASTURE
>< TREES/
BRUSH
7f-
VyGATE
132 FT.
f
o
to 4.
to *
f
429 FT.
I
J:
I
o
to
to
GATE
ST*.
o
to
to
X
0 10 20 40 60
METERS
MS00923
33S23E250000
NORTH HIGHWAY 191
MONTICELLO, UTAH
Figure 1. Property Map (sheet 1 of 2)
EXPLANATION
Remaining
contamination §11 Concrete
RDC
Measurement RDC Assessed
contamination
Area identifier <Sc
Composite sample V1 Assessed area
not found
Identifier of
averaged area &
Biased sample
y Excavated
A area
B1
V3
V2
1
o
VI | 14-17 /iR/h
V2j 14-17 /tR/h
V3 | 14-17 /tR/h
reer 20
0 t
MEIERS
DETAIL
MS00923
33S23E250000
ORTH HIGHWAY 191
MONTICELLO, UTAH
Figure 1. Property Map-(Sheet 2 of 2)
9
REFERENCES
Geotech 1996, Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00923-VL, Address: Parcel No. 33S23E250000, North
Highway 191, Monticello, Utah 84535, Geotech, Grand Junction, Colorado, February
1996.
ORNL 1993. Environmental Technology Section Procedures Manual. ORNL 6645/R2
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.
DOE ID No.: MS-00936-RS
Property Address: Parcel No. 33240309001, East Highway 666
Vicinity Property Certification Summary and Recommendation
Summary Evaluation
Certification Criteria MACTEC-ERS
U.S. Department
of Energy (DOE)
Ra-226 is s 5 pCi/g above
background in top 15-cm-thick layer
of soil, averaged over 100 m2.
In situ [X] Lab [ ]
Ra-226 is s 15 pCi/g above
background in any 15-cm-thick layer
of soil more than 15 cm below the
surface, averaged over 100 m2.
In situ [ ]Lab[X]
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 WL or, at
most, 0.03 WL.
Supplemental standards were applied
in accordance with EPA standard
40 CFR 192.21.
Hot spot criteria met as outlined by
DOE guidelines for FUSRAP (Rev.2,
March 1987).
Yes No Not Taken Yes No Not Taken
OT. [ ]
[X] [ ]
[X] [ ]
[X] [ ]
[ ] [X]
[X] [ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
LX] [ ]
M [ ]
[X] [ ]
[ ] [>]
[>] [ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ 1
"The excavations were backfilled with materials that were measured at the source indicating 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.
1 of 2
DOE ID No.: MS-00936-RS
MACTEC-ERS Recommendation
On the basis ofthe Property Completion Report evaluation, this property is recommended for
[X] Certification by DOE.
[ ] Certification by DOE with the concurrence of the U.S. Nuclear Regulatory Commission
because supplemental standards were applied according to 40 CFR 192.21.
Manager, Monticello Program
MACTEC-ERS
DOE Evaluation
On the basis of the Property Completion Report recommendation, this property
[ $ Should be certified by DOE.
[ ] Should be certified by DOE with the concurrence of the U.S. Nuclear Regulatory
Commission because supplemental standards were applied according to 40 CFR 192.21.
U.S. Department of Energy
Work performed under DOE Contract No. DE-AC13-96GJ87335, Task Order No. 96-05.02.14
2 of 2
Monticello Vicinity Properties Project
Property Completion Report
for
Monticello
Vicinity Property Remedial Action
for
DOE ID No.: MS-00936-RS
Address: Parcel No. 33240309001,
East Highway 666
Monticello, Utah 84535
April 1997
Prepared for
U.S. Department of Energy
Albuquerque Operations Office
Grand Junction Office
Prepared by
MACTEC-Environmental Restoration Services, LLC (MACTEC-ERS)*
Grand Junction, Colorado
Michael C. Butherus
Manager, Monticello Program
Work performed under DOE Contract No. DE-AC 13-96GJ87335
Task Order No. 96-05.02.14
*MACTEC-ERS has been granted authorization to conduct remedial action by the U.S. Department of Energy.
Remedial action was performed 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, Subpart B; and "Implementation," in 40 CFR 192, Subpart C, and the U.S. Department of
Energy Formerly Utilized Sites Remedial Action Program hot spot criteria.
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-00936-RS
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was established to reduce
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 U.S. Department of Energy (DOE) 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. Cleanup activities also were conducted to meet the hot spot
criteria established by radiological protection guidelines in the DOE
"Guidelines for Residual Radioactive Material at Formerly Utilized Sites
Remedial Action Program and Remote Surplus Facilities Management
Program Sites" (Revision 2, March 1987).
This property was evaluated on the basis of EPA standards and DOE hot
spot criteria by the DOE Inclusion Survey Contractor. DOE reviewed
these evaluation results and determined that the property contained mill
tailings (residual radioactive material) exceeding DOE hot spot criteria.
The Remedial Action Contractor was notified of the inclusion of this
property into the MVP Project and was authorized by DOE to conduct
remedial action as required to bring the property into conformance with
EPA standards and DOE hot spot criteria.
1
DOE ID No.: MS-00936-RS
1.3 Summary of Remedial Action
DOE ID No.:
Legal Description:
Property Location:
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-00936-RS
Beginning 561.5 feet north and 1,320 feet
west of the SE corner of Section 30,
T33S., R24E., Salt Lake Base Meridian;
south 207.5 feet, east 200 feet, north
207.5 feet, west 200 feet to beginning,
City of Monticello, County of San Juan,
State of Utah
Parcel No. A33240309001
East Highway 666
Monticello, Utah 84535

Residential Simple (RS)
Oak Ridge National Laboratory
September 12, 1991
Rust Geotech
Not applicable: streamlined remediation
procedures were followed
Not applicable: streamlined remediation
procedures were followed
July 27, 1992
July 29, 1992
Interior:
Exterior:
0 cubic yards
0.9 cubic yards
1.8 square meters (m2)
March 1996
2
DOE ID No.: MS-00936-RS
2.0 OPERATIONS SUMMARY
2.1 Abstract of Remedial Action Plan
Streamlined remediation procedures were followed for this property. 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 approximately 0.03 cubic yards of
contamination, 6 inches deep, within the property. The remedial action
process included the removal of approximately 0.9 cubic yards of residual
radioactive material, 15 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-00936-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 the Remedial Action
Contractor during 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, 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 10 to 21 microroentgens per
hour C^R/h), as indicated on Appendix Figure 2.1. The result of
analysis for radium-226 in one individual soil sample was
12.7 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 0.0108 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-00936-RS
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by EPA standards (40 CFR 192.12, 192.20-23) and
DOE hot spot criteria, as indicated in the Certification Data Summary
below.
Therefore, the property located at Parcel No. A33240309001, East
Highway 666, in Monticello, Utah, is recommended for certification as
required by DOE guidelines, and the appropriate records should be
documented.
Certification Data Summary
Applicability
Habitable Structures
Exposure Rate:
Radon Decay-Product
Concentration:
Land
Radium-226 Concentration
in Surface Soil:
Radium-226 Concentration
in Subsurface Soils:
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.
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.
Survey Results
Range for the ground
floor was 12 to 14//R/h.
Annual average was
0.0108 WL.
< 5 pCi/g above
background.**
Soil sample result was
12.7 pCi/g.**
*The background exposure rate is approximately 12//R/h.
The background radium-226 concentration is approximately 2.0 pCi/g.
**The hot spot criteria were met based on gamma scans and/or soil sample results.
5
DOE ID No.: MS-00936-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
JEK:01/31/96
MS-00936.RS WP61
REV080195
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-00936-RS
Location: Parcel No. A33240309001, East Highway 666, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range (//R/h) Number Method" (pCi/g)
V-1b 17-21 R1 OCS 12.7
See Appendix Figure 2.1 for the verification area.
"OCS = Opposed Crystal System
individual soil sample collected at grid coordinates 212277.
7
Table 3.2
Radon Decay-Product Concentration Measurement Results
DOE ID No.: MS-00936-RS
Location: Parcel No. A33240309001, East Highway 666, Monticello, Utah
Instrument Type: Landauer Radtrak Detector
Detector
Number Start Date End Date
Tracks Per
mm2
Radon
Concentration
(pCi/L)
Working
Level
3760477
3760351
3760435
03-09-93
03-09-93
03-09-93
03-07-94
03-07-94
03-07-94
22.7
23.5
23.5
2.10
2.17
2.17
Annual Average:
0.0105
0.0109
0.0109
0.0108
See Appendix Figure 2.1 for the measurement location.
8
10
30
28
26
24
22
20
18
16
14
12
10
12 14
n—i—T
16
i r
18 20 22 24 26 28 30
15
12-15 V-1
17-21
12-'.5
TWO STORY\
LOG HOUSE^
. WITH
\CRAWL SPAC
X12-14 >
RDC
12-15
BARN
10-12
12-15
hi.
HIGHWAY 191
SCALE IN FEET
30 15. 0 30 60
M:\FAS\033\0003\RM00936V 02/20/96 09:Mam T50780
NORTH
THIS DRAWING 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.
J L
©
®
177.-771
Lv.vj
12-15
12
v-i
16-17
(RDC)
32 34 36 38 40
H 1 1 1 ' 30
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
RADON DECAY-PRODUCT CONCENTRATION
MEASUREMENT LOCATION
RADIOLOGICAL AS-BUILT
FIGURE 2.1
EXTERIOR EXTENT OF CONTAMINATION
KCSIOCNCC-NO. OT OCCUPANTS
NON-RCSIOCNCE-UAN-HRS./WK.
INSTHUMCN? NO.
siMvrr OATC
CK. A.c. APP. HO. OATC CK. A.C. AM
U.S. DEPARTMENT OF ENERGY
GRAND JUNCTION PROJECTS OFFICE. COLORAOO
O£»«MCO ^
CHCCKCI 5
sutuinto
PARCEL NO. A33240309001
EAST HIGHWAY 666
MONTICELLO. UTAH
TATT
RUST Rust Qeotech
AKMCTiJ ili(m, ,n,
APPHOVAl OOC TOT
OOC»NO. MS-00936-RS
"Q. 3-B00936-V1 ,MT 1
28
26
24
22
20
18
16
14
12
10
1 Q on 99 94-?6 28 30 32 34 36 38 40
OAK RIDGE NATIONAL LABORATORY
MANAGED BY LOCKHEED MARTIN ENERGY RESEARCH CORPORATION
FOR THE U.S. DEPARTMENT OF ENERGY
PHONE: [phone]
FAX [phone]
POST OFFICE BOX 2567
GRANO JUNCTION. COLORADO 81502 MAY 3 I
Ms. Mary Ann Rondinella
Project Coordinator, Monticello Projects
U.S. Department of Energy
P. O. Box 2567
Grand Junction, Colorado 81502
Dear Ms. Rondinella:
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 rates 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: MS00936-RS
Location Address: Parcel No. A33240309001
East Highway 666
Monticello, Utah 84535
Property Owner:

Tenant Name: Same
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
PARCEL NO. A33240309001, EAST HIGHWAY 666
MONTICELLO, UTAH (MS00936-RS)
M. J. Wilson-Nichols
May 1996
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
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 3
CONCLUSION 3
REFERENCES 5
iii
LIST OF TABLES
Applicable guidelines for protection against radiation
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 N. F. Kirby 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 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 contarninated
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 Parcel No. A33240309001, East Highway 666, Monticello, Utah. The Envi-
ronmental 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 suc-
cessfully 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 PARCEL NO. A33240309001, EAST HIGHWAY 666
MONTICELLO, UTAH (MS00936-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 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 terrninated 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 dis-
posal. During the years of active mill operation, the mill tailings were normally moist, so
erosion was minimal. However, throughout the null'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 decomrrussioning 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 (U.S. DOE 1990b).
*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-AC05-96OR22464 with Lockheed Martin Energy Research Corporation.
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 single family residence located at Parcel No. A33240309001, East High-
way 666, Monticello, Utah. The remedial action plan required excavation of all exterior
contamination. When the excavation was completed, the property was resurveyed, in-
cluding soil sampling, to ensure the removal of all contamination, backfilled with uncon-
taminated material, and restored to a condition comparable to that which existed prior to
remedial action (Geotech 1996).
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 Parcel No.
A33240309001, East Highway 666 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 docu-
mentation 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 1996) 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 using streamlined remedial action procedures.
The pre-remedial-action survey performed by Geotech identified 0.03 yd3 of mill
tailings 6 inches deep. During the actual removal process, a total of 0.9 yd3 of con-
taminated earth and uranium mill tailings, 15 inches deep, were removed from a 1.8 m2
area.
A post-excavation survey was performed by Geotech prior to backfilling the exca-
vated area. 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. An individual soil
sample was taken at the bottom 15-cm (6-in.) soil layer of the excavated verification area.
The RAC is unable to locate or inadvertently disposed of the samples requested for
ORNL confirmatory analysis.
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
residence ranged from 12 to 14 uR/h. Exterior surface gamma measurements taken from
the excavated area prior to backfilling ranged from 17 to 21 uR/h.
Soil Sample Analysis
Prior to backfilling, Geotech collected an individual soil sample representative of the
excavated area from the bottom 15-cm (6-in.) soil layer. Geotech's analysis of this
sample showed a 226Ra concentration of 12.7 pCi/g. ORNL ETS was unable to obtain
this sample for confirmatory analysis. This value is below the EPA standard value
of 15 pCi/g for soil layers >15 cm below the surface. Gamma ranges and/or soil sample
results demonstrate compliance to the DOE Hot Spot Guidelines for areas <25 m2 (Table
1).
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 March 9,1993 to March 7,1994). The average annual
working level (WL) of radon progeny concentration, as detennined by the TechVOps-
Landauer Corporation, was 0.0108, which is well below the 0.03-WL guideline given in
Table 1.
CONCLUSION
Results of Geotech soil sample analysis show that radionuclide concentrations are
within applicable DOE guidelines. Based on 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
Radionuclide
concentrations in soil
for Hot Spot areas
Exposure to 222Rn
progeny
Maximum Permissible
concentration of Ra226 in soil
above background level, for
areas less than 25 m2
Average annual radon proge-
ny concentration (including
background)
Ra226 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)
5
REFERENCES
Geotech 1996. Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00936-RS, Address: Parcel No. A33240309001, East
Highway 666, Monticello, Utah 84535, Geotech, Grand Junction, Colorado, March 1996.
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.
DOE ID No.: MS-O0973-OT
Property Address: Parcel No. 33S24E298400, East Highway 666
Vicinity Property Certification Summary and Recommendation
Summary Evaluation
Certification Criteria MACTEC-ERS
U.S. Department
of Energy (DOE)
Yes No Not Taken Yes No Not Taken
Ra-226 is s 5 pCi/g above
background in top 15-cm-thick layer of
soil, averaged over 100 m2
In situ [X] Lab [ ]
Ra-226 is <, 15 pCi/g above
background in any 15-cm-thick layer
of soil more than 15 cm below the
surface, averaged over 100 m2.
In situ [ ]Lab[X]
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 WL or, at
most, 0.03 WL.
Supplemental standards were applied
in accordance with EPA standard
40 CFR 192.21.
Hot spot criteria met as outlined by
DOE guidelines for FUSRAP (Rev.2,
March 1987)
[XT [ ] [ ] >] [ ] [ ]
[X] [ ]
[X] [ ]
[X] [ ]
[ ] [X]
[X] [ ]
[ ]
[ ]
[ 1
[ ]
[ ]
W [ ]
ft] [ ]
M [ 1
[ ] [X]
[>I [ ]
[ ]
[ ]
[ ]
[ ]
[ ]
The excavations were backfilled with materials that were measured at the source indicating 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.
Riiiiiiiiii imiiiiiiiii
SFCERTIFED SFMS-00973
1 of 2
DOE ID No.: MS-O0973-OT
MACTEC-ERS Recommendation
On the basis of the Property Completion Report evaluation, this property is recommended for
[X] Certification by DOE.
[ ] Certification by DOE with the concurrence of the U.S. Nuclear Regulatory Commission
because supplemental standards were applied according to 40 CFR 192.21.
On the basis of the Property Completion Report recommendation, this property
[,*] Should be certified by DOE.
[ ] Should be certified by DOE with the concurrence of the U.S. Nuclear Regulatory
Commission because supplemental standards were applied according to 40 CFR 192.21.
Manager, Monticello Programs
MACTEC-ERS
DOE Evaluation
U.S. Department of Energy
Work performed under DOE Contract No. DE-AC13-96GJ87335, Task Order No. 96-05.02.14
2 of 2
Monticello Vicinity Properties Project
Property Completion Report
for
Monticello
Vicinity Property Remedial Action
for
DOE ID No.: MS-00973-OT
Address: Parcel No. 33S24E298400, East Highway 666
Monticello, Utah 84535
February 1997
Prepared for
U.S. Department of Energy
Albuquerque Operations Office
Grand Junction Office
Prepared by
MACTEC-Environmental Restoration Services, LLC (MACTEC-ERS)*
Grand Junction, Colorado
Michael C. Butherus
Manager, Monticello Programs
Work performed under DOE Contract No. DE-AC13-96GJ87335
Task Order No. 96-05.02.14
*MACTEC-ERS has been granted authorization to conduct remedial action by the U.S. Department of Energy.
Remedial action was performed 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
DOE ID No.: MS-00973-OT
Contents
Page
1.0 Summary 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Remedial Action Summary 2
2.0 Operations Summary 3
2.1 Remedial Action Plan 3
2.2 Assessed and Remediated Contamination 3
3.0 Verification Summary 4
3.1 Radiological Survey Data 4
3.1.1 Preremedial Action Survey 4
3.1.2 Postexcavation Survey 4
3.2 Recommendation for Certification 5
Table
Table 1. Certification Data Summary 5
Appendix
Appendix A. Radiological Conditions A-1
DOE/Grand Junction Office
February 1997
MVP Property Completion Report
Page ii
DOE ID No.: MS-00973-OT
1.0 Summary
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was established to reduce the potential hazard
to the public due to long-term exposure to low-level radioactivity associated with the off-site 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 process both uranium and
vanadium ore. 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 U.S. Department of Energy (DOE) 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. Cleanup
activities also were conducted to meet the hot spot criteria established by radiological protection
guidelines in the DOE Guidelines for Residual Radioactive Material at Formerly Utilized Sites
Remedial Action Program and Remote Surplus Facilities Management Program Sites
(Revision 2, March 1987).
This property was evaluated on the basis of EPA standards and DOE hot spot criteria and
determined to contain mill tailings (radioactive material) exceeding EPA standards and/or DOE
hot spot criteria. The Remedial Action Contractor* was notified of the inclusion of this property
into the MVP Project and was authorized by DOE to conduct remedial action as required to bring
the property into conformance with EPA standards and DOE hot spot criteria.
The Remedial Action Contractor, MACTEC-ERS, was awarded the U.S. Department of Energy Grand Junction
Office (DOE-GJO) Technical Assistance and Remediation contract and commenced work on September 5, 1996.
The MACTEC-ERS team consists of International Technology Corporation, Science Application International
Corporation, Roy F. Weston, Inc., and Rust Federal Services, Inc. Rust Geotech was the DOE-GJO contractor from
October 1, 1986, through September 4, 1996, and implemented some of the tasks discussed in this report.
DOE/Grand Junction Office
February 1997
MVP Property Completion Report
Page 1
DOE ID No.: MS-O0973-OT
1.3 Remedial Action Summary
DOE ID No.: MS-00973-OT
Legal Description: Beginning 113 feet north and south 89 degrees 51 minutes west 1,750 feet
from the SE comer of Section 29, T33S, R24E, Salt Lake Base Meridian; south 89 degrees
51 minutes west 427 feet, north 00 degrees 09 minutes west 153 feet, north 89 degrees 51 minutes
east 427 feet, south 00 degrees 09 minutes east 153 feet to beginning, City of Monticello,,
County of San Juan, State of Utah
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological and Engineering Assessment (REA):
Construction Subcontractor:
Preconstruction Conference Record:
Notice of Final Completion Inspection:
Volume of Material Removed in Cubic Yards (yd3):
Area Cleaned Up in Square Meters (m2):
Property Completion Report Submitted:
Parcel No. 33S24E298400
East Highway 666
Monticello, Utah 84535

Other (OT)
Oak Ridge National Laboratory
Grand Junction Office
September 12, 1991
MACTEC-ERS
April 7, 1994
Crowley Construction, Inc.
October 3, 1994
November 7, 1994
Exterior:
Interior:
15
0
49
February 1997
DOE/Grand Junction Office
February 1997
MVP Property Completion Report
Page 2
DOE ID No.: MS-00973-OT
2.0 Operations Summary
2.1 Remedial Action Plan
The remedial action plan specified removal of radioactive material. Once excavation was
completed, the affected area was resurveyed for possible remaining 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 before remedial action
activities.
2.2 Assessed and Remediated Contamination
The radiological assessment identified 17 yd3 of contamination, ranging from 6 to 12 inches (in.)
deep, within the property boundary. The remedial action process included removal of
approximately 15 yd3 of radioactive material, ranging from 6 to 12 in. deep. The areas of
assessed and excavated contamination are shown on Figure A-1.
DOE/Grand Junction Office
February 1997
MVP Property Completion Report
Page 3
DOE ID No.: MS-O0973-OT
3.0 Verification Summary
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Preremedial Action Survey
The Remedial Action Contractor conducted a radiological survey during June 1993, as described
in the final REA. Figure A-1 shows the extent of assessed contamination and identifies the area
recommended for remedial action.
3.1.2 Postexcavation Survey
A scintillometer was used to perform a surface gamma scan after the removal of radioactive
material and before backfilling. Following the gamma scan, soil samples representative of the
6-in.-thick soil layer at the bottom of the excavation were collected. These samples, representing
the verification area, were analyzed for radium-226. The results of the gamma scan and soil
sample analyses are presented in Table A-1.
DOE/Grand Junction Office
February 1997
MVP Property Completion Report
Page 4
DOE ID No.: MS-00973-OT
3.2 Recommendation for Certification
Radioactive materials have been removed from this property to the extent required by EPA
standards (40 CFR 192, Subparts B and C) and DOE hot spot criteria, as indicated in the
Certification Data Summary (Table 1). Therefore, the property located at Parcel
No. 33S24E298400, East Highway 666, in Monticello, Utah, is recommended for certification as
required by DOE guidelines.
Table 1. Certification Data Summary
Applicability Standard Survey Results
Radium-226
Concentration in
Surface Soil
Radium-226
Concentration in
Subsurface Soil
Exposure Rate
Land
Shall not exceed 5 pCi/g above
background* in the 15-cm-thick
surface layer, averaged over
100 m2.
Shall not exceed 15 pCi/g
above background3 in any
15-cm-thick soil layer more
than 15 cm below the surface,
averaged over 100 m2.
Habitable Structures
< 5 pCi/g above background on the
basis of gamma exposure rates that do
not exceed 30 percent above normal
background.6
Soil sample result was 3.7 pCi/g.b
Shall not exceed 20 pR/h
above background.0
Range for the ground floor was 12 to
14pR/h.
Radon Decay- Annual average shall not Average was 0.0017 WL, on the basis
Product exceed 0.02 WL, to the extent of the DOE-approved abbreviated-
Concentration practicable, and shall in no measurement method.
case exceed 0.03 WL.
Key: cm = centimeters; m2 = square meters; pCi/g = picocuries per gram; uR/h = microroentgens per hour;
WL = working level
aThe background radium-226 concentration for Monticello Vicinity Properties is approximately 2.0 pCi/g.
The hot spot criteria were met based on gamma scans and/or soil sample results.
The background exposure rate for this property is approximately 13 uR/h.
DOE/Grand Junction Office
February 1997
MVP Property Completion Report
Page 5
DOE ID No.: MS-00973-OT
Appendix A
Radiological Conditions
Table A-1. Postexcavation Survey Results
Table A-2. Radon Decay-Product Concentration Measurement Results
Figure A-1. Radiological As-Built
DOE ID No.: MS-00973-OT
Table A-1. Postexcavation Survey Results
Gamma Radium-226
Verification Exposure Rate Soil Sample Measurement Concentration
Area' Range (uR/h) Ticket No. Method (pCi/g)
V-1 13-16 NCG 195 OCS 3.7
Key: OCS = opposed crystal system; pCi/g = picocuries per gram; uR/h = microroentgens per hour;
V = verification area
"See Figure A-1 for location of verification area.
DOE/Grand Junction Office
February 1997
MVP Property Completion Report
Page A-2
DOE ID No.: MS-00973-OT
Table A-2. Radon Decay-Product Concentration Measurement Results*
Detector"
Number Start Date End Date
Radon
Concentration
(pCi/L) WL
3964260
3964304
3964312
02-28-95
02-28-95
02-28-95
05-30-95
05-30-95
05-30-95
0.36
0.33
0.34
Average:
0.0018
0.0017
0.0017
0.0017
Key: pCi/L = picocuries per titer; WL = working level
"See Figure A-1 for measurement location.
Terradex Radtrak Detector.
DOE/Grand Junction Office
February 1997
MVP Property Completion Report
Page A-3
n—r 1—r ii i r T—i—i—i—i—i—i—r
32 34 36 38 40
i—i—i—i—i—r i—r
46 48 SO 32 54 36 38
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d>
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ONE STORY
BRICK BUILDIN
12-14 .
EAST HIGHWAY 666
SCALE IN FEET
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1 X
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Of CNERGT AHO ITS CONTRACTORS IT rS MOT A LAND SU«VET
PlAT. UTHJTV LOCATION P\\A1. OH OTHER IMPROVEMENT SURVEY
PUtT AMD H NOT TO BC ftCuCD UPON fOR THE CSTAtt'SHUENT
OF FENCE, tUttDiNC. OR OTHER FUTURE lUPROVCUENT LINES
I I L J L J L J L
iECEUC
ALL DEPTHS/HEICHTS IN INCHES
ALL EXPOSURE RATES IN ^R/h
ASSESSEO AREA IOENTIFIER
AVERAGE DEPTH OF ASSESSEO CONTAMINATION
AREA OF ASSESSED CONTAMINATION
EXPOSURE-RATE RANGE
— BOUNDARY OF EXCAVATION
[Tri AVERAGE EXCAVATED OEPTH FOR THE DEPOSIT OF
LLil CONTAMINATION
I V-10 I VERIFICATION AREA IDENTIFIER
0
<D
r:.-n
LV.vj
12-13
® RADON OECAY-PRODUCT CONCENTRATION
MEASUREMENT LOCATION
U.S. DEPARTMENT OF ENERGY
CfiAND JUNCTION OFTICE. COLOfUDO
PARCEL 33S24E298400
EAST HIGHWAY 666
MONTICELLO, UTAH
COMPUinON REPORTS MONTICELLO VICINITY PROPERTIES
FIGURE A-1
RADIOLOGICAL AS-BUILT
US-0097J-OT
rA5-033-0003-RM00973V 1 1
12 14 16 22 28 30 32 34 36 38 40 42
OAK RIDGE NATIONAL LABORATORY
MANAGED BY LOCKHEED MARTIN ENERGY RESEARCH CORPORATION
FOR THE U.S. DEPARTMENT OF ENERGY
PHONE: [phone]
FAX: [phone]
2597 BV. Road
GRAND JUNCTION. COLORADO 81503
MAR 3 I 1997
Ms. Mary Ann Rondinella
Project Coordinator, Monticello Projects
U.S. Department of Energy
P. O. Box 2567
Grand Junction, Colorado 81502
Dear Ms. Rondinella:
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 ofthe 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 rates at
this property.
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
MS00973-OT
Parcel No. 33S24E298400. East Highway 666
Monticello. Utah 84535
Property Owner:

Tenant Name: Port of Entry
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
PARCEL NO. 33S24E298400, EAST HIGHWAY 666
MONTICELLO, UTAH (MS00973-OT)
M. K. Jensen
March 1997
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81503
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 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1. Applicable guidelines for protection against radiation 4
2. Results of ORNL analysis ofthe RAC soil samples from Parcel No. 33S24E298400, East
Highway 666, Monticello, Utah (MS00973-OT) 5
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 A. D. Laase and P. D.
Roundtree 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 (DOE) 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
1994, the Remedial Action Contractor (RAC) designated by DOE, performed remedial action on the
vicinity property at Parcel No. 33S24E298400, East Highway 666, 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
1
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT PARCEL NO. 33S24E298400, EAST HIGHWAY 666
MONTICELLO, UTAH (MS00973-OT)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the United States (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. Vana-
dium 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 de-
commissioning 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
ofthe 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 (US DOE 1990b).
•The verification of remedial action was performed by members ofthe Environmental Assessment Group in thc Environmental
Technology Section of the Health Sciences Research Division at Oak Ridge National Laboratory under DOE contract DE-AC05-
960R22464 with Lockheed Martin Energy Research Corporation.
2
During 1994, the Remedial Action Contractor (RAC) designated by DOE, performed remedial
action on the vicinity property that is the subject of this report, a port of entry located at Parcel No.
33S24E298400, East Highway 666, 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
(MACTEC-ERS 1997).
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 Environ-
mental Technology Section (ETS) of Oak Ridge National Laboratory (ORNL) has been assigned the
responsibility of this task at Parcel No. 33S24E298400, East Highway 666 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 (US DOE 1990a).
Document Reviews
Review of the RAC property completion report (MACTEC-ERS 1997) indicates the property
was remediated as evaluated by DOE on the basis of U.S. Environmental Protection Agency
standards and the DOE guidelines (US 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 the RAC identified 17 yd3 of mill tailings 6 to 12
inches deep. During the actual removal process, a total of 15 yd3 of contaminated earth and material,
6 to 12 inches deep, were removed from a 49 m2 area.
The RAC performed a post-excavation survey prior to backfilling the excavated area. This
survey consisted of gamma scans with a scintillometer of the ground level of the structure, a surface
scan ofthe exterior, and soil sampling. Samples representative of the bottom 15-cm (6-in.) soil layers
ofthe excavated verification area were collected and blended to form a representative composite soil
sample.
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 radionu-
clide concentrations in soil samples. Applicable DOE guidelines for protection against radiation are
given in Table 1.
Gamma Measurements
Gamma exposure rate measurements taken by the RAC at the ground-level of the building
ranged from 12 to 14 uR/h. Exterior surface gamma measurements taken from the excavated area
prior to backfilling ranged from 13 to 16 uR/h.
Soil Sample Analysis
Prior to backfilling, the RAC collected soil samples representative of the excavated area 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. The RAC's analysis of this sample
showed a 226Ra concentration of 3.7 pCi/g. ORNL ETS obtained this sample and performed a
corifirmatory analysis which showed a 226Ra concentration of 2.4 pCi/g. These values are below the
DOE guideline value of 15 pCi/g for soil layers > 15 cm below the surface. Results of the RAC and
ORNL soil sample analyses are given in Table 2. Gamma ranges and/or soil sample results
demonstrate compliance to the DOE Hot Spot Guidelines for areas <25 m2 (Table 1).
Radon Measurement Results
Radon decay-product concentration (RDC) measurements for this site were determined by the
Alpha-track method. To monitor radon levels, the RAC placed three alpha-track detectors on the
ground floor of the residence located on this property for a period of approximately three months
(from February 28, 1995 to May 30, 1995). The average annual working level (WL) of radon
progeny concentration, as determined by the Tech./Ops-Landauer Corporation, was 0.0017, which
is well below the 0.03-WL guideline given in Table 1.
CONCLUSION
Results of RAC 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 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 averaged 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
progeny concentration
(including background)
Ra226 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
(US DOE 1990a)
5
Table 2. Results of ORNL analysis of the RAC soil samples from
Parcel No. 33S24E298400, East Highway 666, Monticello, Utah (MS00973-OT)
226Ra concentration (pCi/g)
ORNL RAC
sample sample Depth
No." NoJ; (cm} ORNL RAC
XI NCG 195 >15 2.4 3.7
" 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 the RAC, and these samples were blended to form a composite soil sample, which
represents an average over one of the verification areas.
6
REFERENCES
MACTEC-ERS 1997. Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00973-OT, Address: Parcel No. 33S24E298400, East Highway 666,
Monticello, Utah 84535, MACTEC-Environrnental Restoration Services, Grand Junction, Colorado,
February 1997.
ORNL 1993. Environmental Technology Section (Formerly Pollutant Assessment Group)
Procedures Manual. ORNL 6645/R2, September 1993. Oak Ridge National Laboratory, Grand
Junction, Colorado.
US 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,
DC.
US 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.
DOE ID No.: MS-00981-OT
Property Address: Parcel No. A33240323008, South Fourteenth East Street
Vicinity Property Certification Summary and Recommendation
Summary Evaluation
Certification Criteria MACTEC-ERS
U.S. Department
of Energy (DOE)
Ra-226 is <. 5 pCi/g above
background in top 15-cm-thick layer of
soil, averaged over 100 m2
In situ [X] Lab [ ]
Ra-226 is ^ 15 pCi/g above
background in any 15-cm-thick layer
of soil more than 15 cm below the
surface, averaged over 100 m2.
In situ [ ]Lab[X]
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 WL or, at
most, 0.03 WL.
Supplemental standards were applied
in accordance with EPA standard
40 CFR 192.21.
Hot spot criteria met as outlined by
DOE guidelines for FUSRAP (Rev.2,
March 1987)
Yes No Not Taken Yes No Not Taken
[X]a [ ]
[X] [ ]
[ ] [ ]
[ ] [ ]
[ ] [X]
[X] [ ]
[ ]
[ ]
[X]b
[X]b
[ ]
[ ]
M [ ]
[X] [ ]
[ ] [ ]
[ ] [ ]
[ ] W
[ )
[ ]
[ 1
[tf [ ] [ ]
'The excavations were backfilled with materials that were measured at the source indicating 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.
No habitable structures.
iniiiiiiin
SFCERTIFED
•llllllllll
SFMS-00981
1 of 2
DOE ID No.: MS-00981-OT
MACTEC-ERS Recommendation
On the basis of the Property Completion Report evaluation, this property is recommended for
[X] Certification by DOE.
[ ] Certification by DOE with the concurrence of the U.S. Nuclear Regulatory Commission
because supplemental standards were applied according to 40 CFR 192.21.
Manager, Monticello Programs
MACTEC-ERS
DOE Evaluation
On the basis of the Property Completion Report recommendation, this property
|A ] Should be certified by DOE.
[ ] Should be certified by DOE with the concurrence of the U.S. Nuclear Regulatory
Commission because supplemental standards were applied according to 40 CFR 192.21.
U.S. Department of Energy
Work performed under DOE Contract No. DE-AC13-96GJ87335, Task Order No. 96-05.02.14
2 of 2
Monticello Vicinity Properties Project
Property Completion Report
for
Monticello
Vicinity Property Remedial Action
for
DOE ID No.: MS-00981-OT
Address: Parcel No. A33240323008, South Fourteenth East Street
Monticello, Utah 84535
January 1997
Prepared for
U.S. Department of Energy
Albuquerque Operations Office
Grand Junction Office
Prepared by
MACTEC-Environmental Restoration Services, LLC (MACTEC-ERS)*
Grand Junction, Colorado
Michael C. Butherus
Manager, Monticello Programs
Work performed under DOE Contract No. DE-AC 13-96GJ87335
Task Order No. 96-05.02.14
*MACTEC— ERS has been granted authorization to conduct remedial action by the U.S. Department of Energy.
Remedial action was performed 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, Subpart B; and "Implementation," in 40 CFR 192, Subpart C, and the U.S. Department of
Energy Formerly Utilized Sites Remedial Action Program hot spot criteria.
DOE ID No.: MS-00981-OT
Contents
Page
1.0 Summary 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Remedial Action Summary 2
2.0 Operations Summary 3
2.1 Remedial Action Plan 3
2.2 Assessed and Remediated Contaniination 3
3.0 Verification Summary 4
3.1 Radiological Survey Data 4
3.1.1 Preremedial Action Survey 4
3.1.2 Postexcavation Survey 4
3.2 Recommendation for Certification 5
Table
Table 1. Certification Data Summary 5
Appendix
Appendix A. Radiological Conditions A-1
DOE/Grand Junction Office
January 1997
MVP Property Completion Report
Page ii
DOE ID No.: MS-00981-OT
1.0 Summary
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was established to reduce the potential hazard
to the public due to long-term exposure to low-level radioactivity associated with the off-site 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 JJ. 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 process both uranium and
vanadium ore. 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 U.S. Department of Energy (DOE) 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. Cleanup
activities also were conducted to meet the hot spot criteria established by radiological protection
guidelines in the DOE Guidelines for Residual Radioactive Material at Formerly Utilized Sites
Remedial Action Program and Remote Surplus Facilities Management Program Sites
(Revision 2, March 1987).
This property was evaluated on the basis of EPA standards and DOE hot spot criteria and
determined to contain mill tailings (radioactive material) exceeding EPA standards and/or DOE
hot spot criteria. The Remedial Action Contractor* was notified of the inclusion of this property
into the MVP Project and was authorized by DOE to conduct remedial action as required to bring
the property into conformance with EPA standards and DOE hot spot criteria.
The Remedial Action Contractor, MACTEC-ERS, was awarded the U.S. Department of Energy Grand Junction
Office (DOE-GJO) Technical Assistance and Remediation contract and commenced work on September 5, 1996.
The MACTEC-ERS team consists of International Technology Corporation, Science Application International
Corporation, Roy F. Weston, Inc., and Rust Federal Services, Inc. Rust Geotech was the DOE-GJO contractor from
October 1,1986, through September 4,1996, and implemented some of the tasks discussed in this report.
DOE/Grand Junction Office
January 1997
MVP Property Completion Report
Page 1
DOE ID No.: MS-00981-OT
1.3 Remedial Action Summary
DOE ID No.:
Legal Description:
MS-00981-OT
Beginning 263 feet south and 1,080 feet east of the NW corner of Section 32, T33S, R24E, Salt
Lake Base Meridian; south 492 feet, east 25 feet, north 492 feet, west 25 feet to beginning, City
of Monticello, County of San Juan, State of Utah
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological and Engineering Assessment (REA):
Construction Subcontractor:
Preconstruction Conference Record:
Notice of Final Completion Inspection:
Volume of Material Removed in Cubic Yards (yd3):
Area Cleaned Up in Square Meters (m2):
Property Completion Report Submitted:
Parcel No. A33240323008
South Fourteenth East Street
Monticello, Utah 84535

Other (OT)
Oak Ridge National Laboratory
Grand Junction Office
February 21,1991
MACTEC-ERS
Not applicable (streamlined
remediation)
Sonderegger, Inc.
August 3, 1994
August 22, 1994
Exterior: 0.5
Interior: 0
2.6
January 1997
DOE/Grand Junction Office
January 1997
MVP Property Completion Report
DOE ID No.: MS-00981-OT
2.0 Operations Summary
2.1 Remedial Action Plan
Streamlined remediation procedures were followed for this property. The remedial action plan
involved removal of exterior radioactive material (Appendix Figure A-1). Once excavation was
complete, the affected area was resurveyed for possible remaining 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 Assessed and Remediated Contamination
The radiological assessment identified contamination, 6 inches (in.) deep, within the property
boundary. The remedial action process included removal of approximately 0.5 yd3 of radioactive
material, 6 in. deep. The areas of assessed and excavated contamination are shown on
Figure A-1.
DOE/Grand Junction Office
January 1997
MVP Property Completion Report
Prion ^
DOE ID No.: MS-00981-OT
3.0 Verification Summary
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Preremedial Action Survey
The Remedial Action Contractor conducted a radiological survey during July 1993. Figure A-1
shows the extent of assessed contamination and identifies the area recommended for remedial
action.
3.1.2 Postexcavation Survey
A scintillometer was used to perform a surface gamma scan after the removal of radioactive
material and before backfilling. Following the gamma scan, soil samples representative of the
6-in.-thick soil layer at the bottom of the excavation were collected. These samples, representing
the verification area, were analyzed for radium-226. The results of the gamma scan and soil
sample analyses are presented in Table A-1.
DOE/Grand Junction Office
January 1997
MVP Property Completion Report
Page 4
DOE ID No.: MS-00981-OT
3.2 Recommendation for Certification
Radioactive materials have been removed from this property to the extent required by EPA
standards (40 CFR 192, Subparts B and C) and DOE hot spot criteria, as indicated in the
Certification Data Summary (Table 1). Therefore, the property located at Parcel
No. A33240323008, South Fourteenth East Street, in Monticello, Utah, is recommended for
certification as required by DOE guidelines.
Table 1. Certification Data Summary
Applicability Standard Survey Results
Radium-226
Concentration in
Surface Soil
Radium-226
Concentration in
Subsurface Soil
Exposure Rate
Land
Shall not exceed 5 pCi/g above
background3 in the 15-cm-thick
surface layer, averaged over
100 m2.
Shall not exceed 15 pCi/g
above background8 in any
15-cm-thick soil layer more
than 15 cm below the surface,
averaged over 100 m2.
Habitable Structures
< 5 pCi/g above background on the
basis of gamma exposure rates that do
not exceed 30 percent above normal
background."
Soil sample result was 1.6 pCi/g.b
Shall not exceed 20 uR/h
above background.
Not applicable (no habitable
structures).
Radon Decay- Annual average shall not Not applicable (no habitable
Product exceed 0.02 WL, to the extent structures).
Concentration practicable, and shall in no
case exceed 0.03 WL.
Key: cm = centimeters; m2 = square meters; pCi/g = picocuries per gram; uR/h = microroentgens per hour;
WL = working level
"The background radium-226 concentration for Monticello Vicinity Properties is approximately 2.0 pCi/g.
n"he hot spot criteria were met based on gamma scans and/or soil sample results.
DOE/Grand Junction Office
January 1997
MVP Property Completion Report
Page 5
DOE ID No.: MS-00981-OT
Appendix A
Radiological Conditions
Table A-1. Postexcavation Survey Results
Figure A-1. Radiological As-Built
DOE ID No.: MS-00981-OT
Table A-1. Postexcavation Survey Results
Gamma Radium-226
Verification Exposure Rate Soil Sample Measurement Concentration
Area* Range (uR/h) Ticket No. Method (pCi/g)
V-1 13-15 NAR 072 OCS 1.6
Key: OCS = opposed crystal system; pCi/g = picocuries per gram; uR/h = microroentgens per hour;
V = verification area
aSee Figure A-1 for location of verification area.
DOE/Grand Junction Office
January 1997
MVP Property Completion Report
Page A-2
,10 12
T
14 16 18
i—r
20 22 24 26 28 30 32 34 36 38 40 42 44 •46 48 50
42
13-16 SOUTH FOURTEENTH EAST STREET
13-16
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13-16
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I I
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ALL DEPTHS/HEIGHTS IN INCHES
ALL EXPOSURE RATES IN jtR/h
ASSESSEO AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR THE DEPOSIT OF
CONTAMINATION
VERIFICATION AREA IDENTIFIER
40
38
36
34
32
30
28
26
24
22
20
18
16
14
SCALE IN FEET
I M:\rAS\0JJ\000J\RUOO98lv 01/24/97 1-29pm 530730
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J L
10 12 14 16
30 15
_l l_
18
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I
20
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24
THIS DRAWING 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 AND IS NOT TO BE RELIED UPON FOR THE ESTABLISHMENT
OF FENCE, BUILDING. OR OTHER FUTURE IMPROVEMENT LINES
26 28
-J L
30 32 34 36 38
U.S. DEPARTMENT OF ENERGY
CftAKO JUNCTION orncc. COLOflAOO
PARCEL A33240J2500S
S. FOURTEENTH EAST ST.
MONTICELLO, UTAH
COWPUITON KEPGR
8 4u
MONTICELLO VICIWTr PROPCflTICS
FIGURE A-1
RADIOLOGICAL AS-BUILT
rAS-<m-oooa-»»o«aiv 1 1
12
10
40 42 44 46 48 50
OAK RIDGE NATIONAL LABORATORY PHONE: [phone]X3
FAX: [phone] MANAGED BY LOCKHEED MARTIN ENERGY RESEARCH CORPORATION
FOR THE U.S. DEPARTMENT OF ENERGY
2597 BK Road
GRAND JUNCTION. COLORADO 61503
m 31 mi
Ms. Mary Ann Rondinella
Project Coordinator, Monticello Projects
U.S. Department of Energy
P. O. Box 2567
Grand Junction, Colorado 81502
Dear Ms. Rondinella:
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
M6Ra concentration in the soil.
This property is recommended for certification by the U.S. Department of Energy.
Location Number: MS00981-OT
Location Address: Parcel No. A33240323008. South 14th East Street
Monticello. Utah 84535
Property Owner:

Sincerely,
Gretchen A. Pierce
MVP/IVC Project Manager
Environmental Assessment Group
Monticello. Utah 84535
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
PARCEL NO. A33240323008, SOUTH 14TH EAST STREET
MONTICELLO, UTAH (MS00981-OT)
M. K. Jensen
March 1997
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81503
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 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1. Applicable guidelines for protection against radiation 4
2. Results of ORNL analysis ofthe RAC soil samples from Parcel No. A33240323008, South
14th East Street, Monticello, Utah (MS00981-OT) 5
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 A. D. Laase 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 (DOE) 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
1994, the Remedial Action Contractor (RAC) designated by DOE, performed remedial action on the
vicinity property at Parcel No. A33240323008, South 14th 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
1
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT PARCEL NO. 33240323008, SOUTH 14TH EAST STREET
MONTICELLO, UTAH (MS00981-OT)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the United States (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. Vana-
dium 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 de-
commissioning 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 (US DOE 1990b).
*The verification of remedial action was performed by members ofthe Environmental Assessment Group in the Environmental
Technology Section of the Health Sciences Research Division at Oak Ridge National Laboratory under DOE contract DE-AC05-
960R22464 with Lockheed Martin Energy Research Corporation.
2
During 1994, the Remedial Action Contractor (RAC) designated by DOE, performed remedial
action on the vicinity property that is the subject of this report, a city street located at Parcel No.
A33240323008, South 14th 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 (MACTEC-ERS 1997).
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 Environ-
mental Technology Section (ETS) of Oak Ridge National Laboratory (ORNL) has been assigned the
responsibility of this task at Parcel No. 33240323008, South 14th 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 (US DOE 1990a).
Document Reviews
Review of the RAC property completion report (MACTEC-ERS 1997) indicates the property
was remediated as evaluated by DOE on the basis of U.S. Environmental Protection Agency
standards and the DOE guidelines (US DOE 1990a). Excess residual radioactive materials were
present, thus it was appropriate to designate this property for remedial action using streamlined
remedial action procedures.
The pre-remedial-action survey performed by the RAC identified mill tailings 6 inches deep.
During the actual removal process, a total of 0.5 yd3 of contaminated earth and material, 6 inches
deep, were removed from a 2.6 m2 area.
The RAC performed a post-excavation survey prior to backfilling the excavated area. 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 verification area were
collected and blended to form a representative composite soil sample.
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 radionu-
clide 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 the RAC from the excavated area
prior to backfilling ranged from 13 to 15 uR/h.
Soil Sample Analysis
Prior to backfilling, the RAC collected soil samples representative of the excavated area 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. The RAC's analysis of this sample
showed a 226Ra concentration of 1.6 pCi/g. ORNL ETS obtained this sample and performed a
confinnatory analysis which showed a M6Ra concentration of 1.5 pCi/g. These values are below the
DOE guideline value of 15 pCi/g for soil layers > 15 cm below the surface. Results of the RAC and
ORNL soil sample analyses are given in Table 2. Gamma ranges and/or soil sample results
demonstrate compliance to the DOE Hot Spot Guidelines for areas <25 m2 (Table 1).
Radon Measurement Results
Radon decay-product concentration (RDC) measurements for this site were not determined as
this property is a city street.
CONCLUSION
Results of the RAC 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 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
Radionuclide con-
centrations in soil
for Hot Spot areas
Exposure to 222Rn
progeny
Maximum permissible con-
centration of 226Ra in soil
above background levels,
averaged over a 100-m2
area
Maximum Permissible con-
centration of Ra226 in soil
above background level,
for areas less than 25 m2
Average annual radon
progeny concentration
(including background)
5 pCi/g averaged over the first 15 cm
of soil below the surface; 15 pCi/g
when averaged over 15-cm-thick soil
layers more than 15 cm below the
surface
Ra226 concentrations, in any surface
or subsurface area less than 25 m2,
is below the guideline by a factor of
(100/A)H, where A is the area of the
elevated region
0.03 WL
(US DOE 1990a)
5
Table 2. Results of ORNL analysis of the RAC soil samples from
Parcel No. A33240323008, South 14th East Street, Monticello, Utah (MS00981-OT)
226Ra concentration (pCi/g)
ORNL RAC
sample sample Depth
No* NoJ; (cm) ORNL RAC
XI NAR 072 >15 1.5 1.6
" 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 the RAC, and these samples were blended to form a composite soil sample, which
represents an average over one of the verification areas.
6
REFERENCES
MACTEC-ERS 1997. Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00981-OT, Address: Parcel No. A33240323008, South Fourteenth
East Street, Monticello, Utah 84535, MACTEC-Environmental Restoration Services, Grand
Junction, Colorado, January 1997.
ORNL 1993. Environmental Technology Section (Formerly Pollutant Assessment Group)
Procedures Manual. ORNL 6645/R2, September 1993. Oak Ridge National Laboratory, Grand
Junction, Colorado.
US 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.
US 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.
DOE ID No.: MS-00992-VL
Property Address: Parcel No. 33S24E320600, East Highway 666
Vicinity Property Certification Summary and Recommendation
Summary Evaluation
Certification Criteria MACTEC-ERS
U.S. Department
of Energy (DOE)
Ra-226 is ^ 5 pCi/g above
background in top 15-cm-thick layer of
soil, averaged over 100 m2
In situ [X] Lab [ ]
Ra-226 is < 15 pCi/g above
background in any 15-cm-thick layer
of soil more than 15 cm below the
surface, averaged over 100 m2.
In situ [ ]Lab[X]
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 WL or, at
most, 0.03 WL.
Supplemental standards were applied
in accordance with EPA standard
40 CFR 192.21.
Hot spot criteria met as outlined by
DOE guidelines for FUSRAP (Rev.2,
March 1987).
Yes No Not Taken Yes No Not Taken
[X]a [ ]
[X] [ ]
[ ] [ ]
[ ] [ ]
[ ] [X]
[X] [ ]
[ ]
[ ]
[X]b
[X]b
[ ]
[ ]
[>] [ ]
[X] [ ]
[ ] [ ]
[ ] [ ]
[ ] Ly]
[>J [ ]
[ ]
[ ]
l>]
[y]
[ ]
[ ]
aThe excavations were backfilled with materials that were measured at the source indicating 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.
Vacant lot.
illllllllll
SFCERTIFED SFMS-00992
1 of 2
DOE ID No.: MS-00992-VL
MACTEC-ERS Recommendation
On the basis of the Property Completion Report evaluation, this property is recommended for
[X] Certification by DOE.
[ ] Certification by DOE with the concurrence of the U.S. Nuclear Regulatory Commission
because supplemental standards were applied according to 40 CFR 192.21.
'Michael C. Butherus (PT Date
Manager, Monticello Programs
MACTEC-ERS
DOE Evaluation
On the basis of the Property Completion Report recommendation, this property
lX\ Should be certified by DOE.
[ ] Should be certified by DOE with the concurrence of the U.S. Nuclear Regulatory
Cornmission because supplemental standards were applied according to 40 CFR 192.21.
42 7*
Cerimcation Official ' Date
U.S. Department of Energy
Work performed under DOE Contract No. DE-AC13-96GJ87335, Task Order No. 96-05.02.14
2 of 2
Monticello Vicinity Properties Project
Property Completion Report
for
Monticello
Vicinity Property Remedial Action
for
DOE ID No.: MS-00992-VL
Address: Parcel No. 33S24E320600, East Highway 666
Monticello, Utah 84535
January 1997
Prepared for
U.S. Department of Energy
Albuquerque Operations Office
Grand Junction Office
Prepared by
MACTEC-Environmental Restoration Services, LLC (MACTEC-ERS)*
Grand Junction, Colorado
Michael C. Butherus
Manager, Monticello Programs
Work performed under DOE Contract No. DE-AC13-96GJ87335
Task Order No. 96-05.02.14
'MACTEC-ERS has been granted authorization to conduct remedial action by the U.S. Department of Energy.
Remedial action was performed 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, Subpart B; and "Implementation," in 40 CFR 192, Subpart C, and the U.S. Department of
Energy Formerly Utilized Sites Remedial Action Program hot spot criteria.
DOE ID No.: MS-00992-VL
Contents
Page
1.0 Summary 1
1.1 Basis for Remedial Action 1
1.2 Criteria for Remedial Action 1
1.3 Remedial Action Summary 2
2.0 Operations Summary 3
2.1 Remedial Action Plan 3
2.2 Assessed and Remediated Contamination 3
3.0 Verification Summary 4
3.1 Radiological Survey Data 4
3.1.1 Preremedial Action Survey 4
3.1.2 Postexcavation Survey 4
3.2 Recommendation for Certification 5
Table
Table 1. Certification Data Summary 5
Appendix
Appendix A. Radiological Conditions A-1
DOE/Grand Junction Office
January 1997
MVP Property Completion Report
Page ii
DOE ID No.: MS-00992-VL
1.0 Summary
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was established to reduce the potential hazard
to the public due to long-term exposure to low-level radioactivity associated with the off-site 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 process both uranium and
vanadium ore. 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 U.S. Department of Energy (DOE) 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. Cleanup
activities also were conducted to meet the hot spot criteria established by radiological protection
guidelines in the DOE Guidelines for Residual Radioactive Material at Formerly Utilized Sites
Remedial Action Program and Remote Surplus Facilities Management Program Sites
(Revision 2, March 1987).
This property was evaluated on the basis of EPA standards and DOE hot spot criteria and
determined to contain mill tailings (radioactive material) exceeding EPA standards and/or DOE
hot spot criteria. The Remedial Action Contractor* was notified of the inclusion of this property
into the MVP Project and was authorized by DOE to conduct remedial action as required to bring
the property into conformance with EPA standards and DOE hot spot criteria.
The Remedial Action Contractor, MACTEC-ERS, was awarded the U.S. Department of Energy Grand Junction
Office (DOE-GJO) Technical Assistance and Remediation contract and commenced work on September 5, 1996.
The MACTEC-ERS team consists of International Technology Corporation, Science Application International
Corporation, Roy F. Weston, Inc., and Rust Federal Services. Inc. Rust Geotech was the DOE-GJO contractor from
October 1, 1986, through September 4, 1996, and implemented some of the tasks discussed in this report.
DOE/Grand Junction Office
January 1997
MVP Property Completion Report
Page 1
DOE ID No.: MS-00992-VL
1.3 Remedial Action Summary
DOE ID No.:
Legal Description:
Property Address:
Property Owner:
Property Category:
Inclusion Survey Contractor:
Inclusion Notification Date:
Remedial Action Contractor:
Radiological and Engineering Assessment (REA):
Construction Subcontractor:
Preconstruction Conference Record:
Notice of Final Completion Inspection:
Volume of Material Removed in Cubic Yards (yd3):
Area Cleaned Up in Square Meters (m2):
Property Completion Report Submitted:
MS-00992-VL
W2NE4 and the E2E2NW4,
Section 32, T33S, R24E, Salt Lake
Base Meridian; except the highway
right-of-way; City of Monticello,
County of San Juan, State of Utah
Parcel No. 33S24E320600
East Highway 666
Monticello, Utah 84535

Vacant Lot (VL)
Oak Ridge National Laboratory
Grand Junction Office
March 5, 1992
MACTEC-ERS
September 9, 1994
Diamond Back Services, Inc.
August 15, 1995
September 11, 1995
Exterior: 5
Interior: 0
20
January 1997
DOLi/Grand Junction Office
January 1997
MVP Property Completion Report
Page 2
DOE ID No.: MS-00992-VL
2.0 Operations Summary
2.1 Remedial Action Plan
The remedial action plan specified removal of radioactive material. Once excavation was
completed, the affected areas were resurveyed for possible remaining 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 before remedial action
activities.
2.2 Assessed and Remediated Contamination
The radiological assessment identified 7 yd3 of contamination, 6 inches (in.) deep, within the
property boundary. The remedial action process included removal of approximately 5 yd3 of
radioactive material, ranging from 6 to 12 in. deep. Exterior assessed Area C could not be located
during remedial action activities. The areas of assessed and excavated contamination are shown
on Figure A-1.
DOE/Grand Junction Office
January 1997
MVP Property Completion Report
Page 3
DOE ID No.: MS-00992-VL
3.0 Verification Summary
3.1 Radiological Survey Data
All survey data were acquired according to approved procedures.
3.1.1 Preremedial Action Survey
The Remedial Action Contractor conducted a radiological survey during June 1993, as described
in the final REA. Figure A-1 shows the extent of assessed contamination and identifies the areas
recommended for remedial action.
3.1.2 Postexcavation Survey
A scintillometer was used to perform a surface gamma scan after the removal of radioactive
material and before backfilling. Following the gamma scan, soil samples representative ofthe
6-in.-thick soil layer at the bottom of the excavation were collected. These samples, representing
the verification area, were analyzed for radium-226. The results of the gamma scan and soil
sample analyses are presented in Table A-1.
DOE/Grand Junction Office
January 1997
MVP Property Completion Report
Page 4
DOE ID No.: MS-00992-VL
3.2 Recommendation for Certification
Radioactive materials have been removed from this property to the extent required by EPA
standards (40 CFR 192, Subparts B and C) and DOE hot spot criteria, as indicated in the
Certification Data Summary (Table 1). Therefore, the property located at Parcel
No. 33S24E320600, East Highway 666, in Monticello, Utah, is recommended for certification
as required by DOE guidelines.
Table 1. Certification Data Summary
Applicability Standard Survey Results
Radium-226
Concentration in
Surface Soil
Radium-226
Concentration in
Subsurface Soil
Exposure Rate
Land
Shall not exceed 5 pCi/g above
background3 in the 15-cm-thick
surface layer, averaged over
100 m2.
Shall not exceed 15 pCi/g
above background3 in any
15-cm-thick soil layer more
than 15 cm below the surface,
averaged over 100 m2.
Habitable Structures
< 5 pCi/g above background on the
basis of gamma exposure rates that do
not exceed 30 percent above normal
background."
Soil sample result was 2.2 pCi/g.b
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 shall in no
case exceed 0.03 WL.
Not applicable: vacant lot.
Key: cm = centimeters; m2 = square meters; pCi/g = picocuries per gram; uR/h = microroentgens per hour;
WL = working level
aThe background radium-226 concentration for Monticello Vicinity Properties is approximately 2.0 pCi/g.
"The hot spot criteria were met based on gamma scans and/or soil sample results.
DOE/Grand Junction Office
January 1997
MVP Property Completion Report
Page 5
DOE ID No.: MS-00992-VL
Appendix A
Radiological Conditions
Table A-1. Postexcavation Survey Results
Figure A-1. Radiological As-Built
DOE ID No.: MS-00992-VL
Table A-1. Postexcavation Survey Results
Gamma Radium-226
Verification Exposure Rate Soil Sample Measurement Concentration
Area' Range (uR/h) Ticket No. Method (pCi/g)
V-1 13-17 NCL 826 OCS 2.2
Key: OCS = opposed crystal system; pCi/g = picocuries per gram; uR/h = microroentgens per hour;
V = verification area
aSee Figure A-1 for location of the verification area.
DOEyGrand Junction Office
January 1997
MVP Property Completion Report
Page A-2
22 ^2 34 36 38 40
-i—i—i—i—i—i—r
42 54 64 66 68 70 72 74
I 1 1 1 1 1 1 1 1 1 152 i r i—r
EAST HIGHWAY 666
SHED
12-13
SEE DETAIL A fl 1
rj
SEE DETAIL B
SHED
12-13
AX61I2
LE
12-15
BX6J12
DETAIL A
SCALE IN FEET
20 10 0 20
DETAIL B
SCALE IN FEET
20
SCALE IN FEET
200 100 0
13-15
C X 6
12-15
LE
©
<D
i—i
12-15
[12]
lv-'°l
LEXEME
ALL DEPTHS/HEIGHTS IN INCHES
ALL EXPOSURE RATES IN uR/h
ASSESSEO AREA IDENTIFIER
AVERAGE DEPTH OF ASSESSED CONTAMINATION
AREA OF ASSESSED CONTAMINATION
EXPOSURE-RATE RANGE
BOUNDARY OF EXCAVATION
AVERAGE EXCAVATED DEPTH FOR "-E DEPOSIT OF
CONTAMINATION
VERIFICATION AREA IDENTIFIER
ASSESSED CONTAMINATION NOT FC.NO AT T'L,'t
OF REMEDIAL ACTION
THIS 01AMINC IS FOR THE SOLE USE Of THC U S DEPARTMENT
Of CNERGT ANO ITS CONTRACTORS IT IS NOT A LAND SURvET
PLAT. UTILITY LOCATION PLAT. OR OTHER IMPROVEMENT SURVCT
PLAT ANO IS NOT TO 0E RCL'EO UPON TOR THE ESTABLISHMENT
OF FENCE. BUILDING. OR OTHER FUTURE IMPROVEMENT LINES
K \FA3\OJl\OIKJ\RMOOff2V Ot/lR/tT OA 4T*ffl WMQ
~'i i I I I I L J L J L J I L
U.S. DEPARTMENT OF ENERGY
GRAN; JUNCTION Of^iCE. COLORADO
aiCTTMiTBT
PARCEL 33S24E320600
EAST HIGHWAY 666
MONTICELLO, UTAH
COMPLETION REPORTS
JO! I
MONTICELLO VICINITY PROPERTIES
FIGURE A-1
RADIOLOGICAL AS-BUILT
M5-00992-VL
FAS-033-0003-RM00992V
34
30
OAK RIDGE NATIONAL LABORATORY PHONE: [phone]
FAX: [phone] MANAGED BY LOCKHEED MARTIN ENERGY RESEARCH CORPORATION
FOR THE U.S. DEPARTMENT OF ENERGY
2597 BM Road
GRAND JUNCTION. COLORADO 81503
IPB 16 mi
Ms. Mary Ann Rondinella
Project Coordinator, Monticello Projects
U.S. Department of Energy
P. O. Box 2567
Grand Junction, Colorado 81502
Dear Ms. Rondinella:
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 ofthe
226Ra concentration in the soil and indoor gamma exposure rates at this property.
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:
MS00992-VL
Parcel No. 33S24E320600. East Highway 666
Monticello. Utah 84535
Property Owner:
Owner Address:

Attachments
LIFE SCIENCES 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
PARCEL NO. 33S24E320600, EAST HIGHWAY 666
MONTICELLO, UTAH (MS00992-VL)
M. K. Jensen
April 1997
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by
OAK RIDGE NATIONAL LABORATORY
Grand Junction, CO 81503
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 3
CONCLUSION 3
REFERENCES 6
iii
LIST OF TABLES
1. Applicable guidelines for protection against radiation 4
2. Results of ORNL analysis ofthe RAC soil samples from Parcel No. 33S24E320600, East
Highway 666, Monticello, Utah (MS00992-VL) 5
iv
ACKNOWLEDGMENTS
Research for this project was sponsored by the Division of Facility and Site Decorrirnissioning
Projects, U.S. Department of Energy. The author wishes to acknowledge M. T. Muck and S. C. Hall
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 (DOE) 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
1995, the Remedial Action Contractor (RAC) designated by DOE, performed remedial action on the
vicinity property at Parcel No. 33S24E320600, 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
1
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT PARCEL NO. 33S24E320600, EAST HIGHWAY 666
MONTICELLO, UTAH (MS00992-VL)*
INTRODUCTION
The mill at Monticello, Utah, was built in 1942 by the United States (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. Vana-
dium 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 de-
commissioning 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 radio-
active 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 Proper-
ties (MVP) Project (US DOE 1990b).
•The verification of remedial action was performed by members of the Environmental Assessment Group in the Environmental
Technology Section of the Life Sciences Division at Oak Ridge National Laboratory under DOE contract DE-AC05-96OR22464
with Lockheed Martin Energy Research Corporation.
2
During 1995, the Remedial Action Contractor (RAC) designated by DOE, performed remedial
action on the vicinity property that is the subject of this report, vacant farmland located at Parcel No.
33S24E320600, East Highway 666, 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
(MACTEC-ERS 1997).
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 Parcel No. 33S24E320600, East Highway 666 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 (US DOE 1990a).
Document Reviews
Review of the RAC property completion report (MACTEC-ERS 1997) indicates the property
was remediated as evaluated by DOE on the basis of U.S. Environmental Protection Agency
standards and the DOE guidelines (US 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 the RAC identified 7 yd3 of mill tailings 6 inches
deep. During the actual removal process, a total of 5 yd3 of contaminated earth and material, 6 to
12 inches deep, were removed from a 20 m2 area.
The RAC performed a post-excavation survey prior to backfilling the excavated areas. This
survey consisted of gamma scans with a scintillometer of the ground levels of the structures, a
surface scan of the exterior, and soil sampling. Samples representative of the bottom 15-cm (6-in.)
soil layers of the excavated verification area were collected and blended to form a representative
composite soil sample.
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 radionu-
clide concentrations in soil samples. Applicable DOE guidelines for protection against radiation are
given in Table 1.
Gamma Measurements
Gamma exposure rate measurements taken by the RAC in the sheds ranged from 12 to 13 uR/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, the RAC 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. The RAC's analysis of this sample
showed a 226Ra concentration of 2.2 pCi/g. ORNL ETS obtained this sample and performed a
confirmatory analysis which showed a 226Ra concentration of 1.2 pCi/g. These values are below the
DOE guideline value of 15 pCi/g for soil layers > 15 cm below the surface. Results ofthe RAC and
ORNL soil sample analyses are given in Table 2. Assessed contamination in Area C was not located
during remediation. An excavation sample taken at the location of Area C showed a 226Ra concentra-
tion of 2. lpCi/g. Gamma ranges and/or soil sample results demonstrate compliance to the DOE Hot
Spot Guidelines for areas <25 m2 (Table 1).
Radon Measurement Results
Radon decay-product concentration (RDC) measurements for this site were not determined as
there were no habitable structures on this property.
CONCLUSION
Results of RAC 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 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 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 averaged over 15-cm-thick soil
layers more than 15 cm below the
surface
Radionuclide con-
centrations in soil
for Hot Spot areas
Maximum Permissible con-
centration of Ra226 in soil
above background level,
for areas less than 25 m2
Ra226 concentrations, in any surface
or subsurface area less than 25 m2,
is below the guideline by a factor of
(100/A)'/2, where A is the area of the
elevated region
Exposure to 222Rn
progeny
Average annual radon
progeny concentration
(including background)
0.03 WL
(US DOE 1990a)
5
Table 2. Results of ORNL analysis of the RAC soil samples from
Parcel No. 33S24E320600, East Highway 666, Monticello, Utah (MS00992-VL)
226Ra concentration (pCi/g)
ORNL RAC
sample sample Depth
No.a No^ (cm} ORNL RAC
XI NCL 826 >15 1.2 2.2
" 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 the RAC, and these samples were blended to form a composite soil sample, which
represents an average over one of the verification areas.
6
REFERENCES
MACTEC-ERS 1997. Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS00992-VL, Address: Parcel No. 33S24E320600, East Highway 666,
Monticello, Utah 84535, MACTEC-Environmental Restoration Services, Grand Junction, Colorado,
January 1997.
ORNL 1993. Environmental Technology Section (Formerly Pollutant Assessment Group)
Procedures Manual. ORNL 6645/R2, September 1993. Oak Ridge National Laboratory, Grand
Junction, Colorado.
US 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.
US 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.
DOE ID No.: MS-01001-RS
Property Address: Parcel No. 33240324803, East Clay Hill Drive
Vicinity Property Certification Summary and Recommendation
Summary Evaluation
Certification Criteria MACTEC-ERS
U.S. Department
of Energy (DOE)
Ra-226 is <; 5 pCi/g above
background in top 15-cm-thick layer
of soil, averaged over 100 m2.
In situ [X] Lab [ ]
Ra-226 is £ 15 pCi/g above
background in any 15-cm-thick layer
of soil more than 15 cm below the
surface, averaged over 100 m2.
In situ [ ]Lab[X]
Interior gamma is s 20 uR/h above
background in any occupied or
habitable structure.
The radon decay-product
concentration in any occupied or
habitable structure is s 0.02 WL or, at
most, 0.03 WL.
Supplemental standards were applied
in accordance with EPA standard
40 CFR 192.21.
Hot spot criteria met as outlined by
DOE guidelines for FUSRAP (Rev.2,
March 1987).
Yes No Not Taken Yes No Not Taken
[X]a [ ]
[X] [ ]
[X] [ ]
[X] [ ]
[ 1 [XI
[X] [ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
l>] [ ]
l>] [ ]
[>] [ ]
M I 1
M [ ]
[ ]
[ 1
[ 1
[ ]
[ 1 [>d I 1
[ 1
"The excavations were backfilled with materials that were measured at the source indicating 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.
1 of 2
DOE ID No.: MS-01001-RS
MACTEC-ERS Recommendation
On the basis of the Property Completion Report evaluation, this property is recommended for
[X] Certification by DOE.
[ ] Certification by DOE with the concurrence of the U.S. Nuclear Regulatory Commission
because supplemental standards were applied according to 40 CFR 192.21.
Manager, Monticello Program
MACTEC-ERS
DOE Evaluation
On the basis ofthe Property Completion Report recommendation, this property
[X] Should be certified by DOE.
[ ] Should be certified by DOE with the concurrence of the U.S. Nuclear Regulatory
Commission because supplemental standards were applied according to 40 CFR 192.21.
Date
U.S. Department of Energy
Work performed under DOE Contract No. DE-AC 13-96GJ87335, Task Order No. 96-05.02.14
2 of 2
Monticello Vicinity Properties Project
Property Completion Report
for
Monticello
Vicinity Property Remedial Action
for
DOE ID No.: MS-01001-RS
Address: Parcel No. 33240324803,
East Clay Hill Drive
Monticello, Utah 84535
April 1997
Prepared for
U.S. Department of Energy
Albuquerque Operations Office
Grand Junction Office
Prepared by
MACTEC-Environmental Restoration Services, LLC (MACTEC-ERS)*
Grand Junction, Colorado
Michael C. Butherus
Manager, Monticello Program
Work performed under DOE Contract No. DE-AC13-96GJ87335
Task Order No. 96-05.02.14
*MACTEC-ERS has been granted authorization to conduct remedial action by the U.S. Department of Energy.
Remedial action was performed 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, Subpart B; and "Implementation," in 40 CFR 192, Subpart C, and the U.S. Department of
Energy Formerly Utilized Sites Remedial Action Program hot spot criteria.
PROPERTY COMPLETION REPORT
FOR
MONTICELLO
VICINITY PROPERTY REMEDIAL ACTION
FOR
DOE ID NO.: MS-01001-RS
ADDRESS: PARCEL NO. A33240324803
EAST CLAY HILL DRIVE
MONTICELLO, UTAH 84535
FEBRUARY 1996
Prepared for
U.S. Department of Energy
Rust Geotech has been granted authorization to conduct remedial action by the
U.S. Department of Energy. 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, and the U.S. Department of Energy Formerly
Utilized Sites Remedial Action Program hot spot criteria.
by
Rust Geotech
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
3.1.3 Radon Decay-Product Concentration (RDC) Measurement .... 4
3.2 Recommendation for Certification 5
4.0 APPENDIX 6
i
DOE ID No.: MS-01001-RS
SUMMARY
1.1 Basis for Remedial Action
The Monticello Vicinity Properties (MVP) Project was established to reduce
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 U.S. Department of Energy (DOE) 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. Cleanup activities also were conducted to meet the hot spot
criteria established by radiological protection guidelines in the DOE
"Guidelines for Residual Radioactive Material at Formerly Utilized Sites
Remedial Action Program and Remote Surplus Facilities Management
Program Sites" (Revision 2, March 1987).
This property was evaluated on the basis of EPA standards and DOE hot
spot criteria by the DOE Inclusion Survey Contractor. DOE reviewed
these evaluation results and determined that the property contained mill
tailings (residual radioactive material) exceeding EPA standards. The
Remedial Action Contractor was notified of the inclusion of this property
into the MVP Project and was authorized by DOE to conduct remedial
action as required to bring the property into conformance with EPA
standards and DOE hot spot criteria.
1
1.3 Surnmary 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-01001-RS
MS-01001-RS
NW4NE4SW4 of Section 32, T33S., R24E.,
Salt Lake Base Meridian, City of Monticello,
County of San Juan, State of Utah
Parcel No. A33240324803
East Clay Hill Drive
Monticello, Utah 84535

Residential Simple (RS)
Oak Ridge National Laboratory
March 5, 1992
Rust Geotech
February 24, 1994
Crowley Construction, Inc.
East Route HC 63 Box 66
Monticello, Utah
October 12, 1994
November 29, 1994
Interior: 0 cubic yards
Exterior: 276 cubic yards
1,186 square meters (ms)
February 1996
2
DOE ID No.: MS-01001-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, 6 inches deep,
within the property. The quantity of contamination for this property was
not specified because it was assessed with MS-01002-VL. The remedial
action process included the removal of approximately 276 cubic yards of
residual radioactive material, ranging from 6 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-01001-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 the Remedial Action
Contractor during July 1993, as described in the final REA dated
February 1994. 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 to 21 microroentgens per
hour OtvR/h), as indicated on Appendix Figure 2.1. The results of
analyses for radium-226 in 15 composite soil samples ranged from
2.3 to 13.2 picocuries per gram (pCi/g), as indicated in Appendix
Table 3.1.
3.1.3 Radon Decay-Product Concentration (RDC) Measurement
Based on the DOE-approved abbreviated-measurement method,
the RDC was 0.0017 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-01001-RS
3.2 Recommendation for Certification
Residual radioactive materials have been removed from this property to
the extent required by EPA standards (40 CFR 192.12, 192.20-23) and
DOE hot spot criteria, as indicated in the Certification Data Summary
below.
Therefore, the property located at Parcel No. A33240324803, East
Clay Hill Drive, in Monticello, Utah, is recommended for certification as
required by DOE 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 to 13 //R/h.
Average was 0.0017 WL,
based on the DOE-
approved abbreviated-
measurement method.
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 2.3 to
13.2 pCi/g.**
*The background exposure rate is approximately 15 //R/h.
The background radium-226 concentration is approximately 2.0 pCi/g.
**The hot spot criteria were met based on gamma scans and/or soil sample results.
5
DOE ID No.: MS-01001-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
JEK: 10-26-95
MS-01001.RS WP61
REV080195
6
Table 3.1
Post-Excavation Sample/Measurement Results
DOE ID No.: MS-01001-RS
Address: Parcel No. A33240324803, East Clay Hill Drive, Monticello, Utah
Exposure-Rate Soil Sample Meas. Radium-226
Area Range (pR/h) Ticket No. Method" (pCi/g)
V-1 15-19 NCC 981 OCS 5.0
V-2 15-19 NCC 982 OCS 3.9
V-3 14-18 NCC 983 OCS 2.6
V-4 15-20 NCC 984 OCS 11.8
V-5 15-18 NCC 985 OCS 4.7
V-6 15-19 NCC 986 OCS 8.4
V-7 14-18 NCC 987 OCS 8.8
V-8 15-19 NCC 988 OCS 13.2
V-9 15-20 NCC 989 OCS 2.3
V-10 15-21 NCC 990 OCS 2.9
V-11 14-19 NCC 991 OCS 3.7
V-12 14-19 NCC 992 OCS 3.4
V-13 14-18 NCC 993 OCS 4.2
V-14 14-20 NCC 994 OCS 11.6
V-15- 15-20 NCC 995 OCS 5.0
See Appendix Figure 2.1 for the verification areas.
"OCS = Opposed Crystal System
»
r>
Table 3.2
Radon Decay-Product Concentration Measurement Results
DOE ID No.: MS-01001-RS
Address: Parcel No. A33240324803, East Clay Hill Drive, Monticello, Utah
Instrument Type: Landauer Radtrak Detector
Detector
Number Start Date End Date
Tracks Per
mm2
Radon
Concentration
(pCi/L)
Working
Level
3964277
3964194
3964326
03-01-95
03-01-95
03-01-95
05-31-95
05-31-95
05-31-95
0.6
0.7
0.7
0.33 0.0017
0.33 0.0017
0.33 0.0017
Average: 0.0017
See Appendix Figure 2.1 for the measurement location.
8
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POST-REMEOIAL ACTION EXPOSURE—RATE RANGE
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CONTAMINATION
ASSESSED CONTAMINATION NOT FOUND AT TIME
OF REMEDIAL ACTION
VERIFICATION SOIL SAMPLE AREA IDENTIFIER
ANO EXCAVATION EXPOSURE —RATE RANGE
RAOON OECAY-PROOUCT CONCENTRATION
MEASUREMENT LOCATION
RADIOLOGICAL AS-BUILT
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' ' ' ' I L
U.S. DEPARTMENT OF ENERGY
CUNO jwcnou raaiccn omcc. COLOMM
IJ H-9S PARCEL NO. A3324O324803
EAST CLAY HILL ORIVC
MONTICELLO. UTAH
nucr Gaoraai INC
ooc am. yj-oiooi-u
owe M> J-001MI-V1 ^ 1 a,
70 72
OAK RIDGE NATIONAL LABORATORY
MANAGED BY LOCKHEED MARTIN ENERGY RESEARCH CORPORATION
FOR THE U.S. DEPARTMENT OF ENERGY
POST OFFICE BOX 2567
GRAND JUNCTION, COLORADO 81502
PHONE: [phone]
FAX: [phone]
MAY 3 ! 1996
Ms. Mary Ann Rondinella
Project Coordinator, Monticello Projects
U.S. Department of Energy
P. O. Box 2567
Grand Junction, Colorado 81502
Dear Ms. Rondinella:
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 Prograjn
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 mRa concentration in the soil, indoor radon daughter concentration, and indoor gamrjia
exposure rates at this property.
Therefore, this property is recommended for certification by the U.S. Department of Energy
Sincerely,
Gretchen A. Pierce
MVP/TVC Project Manager
Environmental Assessment Group
Location Number:
Location Address:
Property Owner:
Owner Address:
Tenant Name:
MS01001-RS
Parcel No. A33240324803. East Clav Hill Drive
Monticello. Utah 84535

Same
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
PARCEL NO. A33240324803, EAST CLAY HILL DRIVE
MONTICELLO, UTAH (MS01001-RS)
M. K. Jensen
May 1996
Work performed by the
ENVIRONMENTAL ASSESSMENT GROUP
Prepared by the
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 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 Parcel No. A33240324803,
East Clay Hill Drive, Monticello, Utah (MS01001-RS) 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 J. R. Sauvage 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 1994, RUST Geotech, the
remedial action contractor designated by DOE, performed remedial action on the vicinity
property at Parcel No. A33240324803, East Clay Hill 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. Procedures used by the
ETS are described in the Environmental Technology Section Procedures Manual (ORNL
1993).
Although this property meets all the criteria for certification, it may need to be
revisited at a later date. A letter in the folio from R. B. Hopping to W. A. Weidner dated
October 5,1994 states that "contaniination on these areas is associated with Halls Ditch.
The association comes from the suspended tailings materials in Halls Ditch and a
flooding situation which occurs as a result of spring runoff. The tailings materials
overflow from Halls Ditch and are collected in a low lying drainage area on Property
MSO1001-RS. If remedial action of the property occurs prior to the remediation of Halls
Ditch, the subject property will become re-contaminated and require a re-assessment and
additional remedial action at a later date."
ix
RESULTS OF THE INDEPENDENT VERIFICATION
OF RADIOLOGICAL REMEDIAL ACTION
AT PARCEL NO. A33240324803, EAST CLAY HILL DRIVE
MONTICELLO, UTAH (MS0T001-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 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
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 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
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 (U.S. DOE 1990b).
•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-AC05-96OR22464 with Lockheed Martin Energy Research Corporation.
2
During 1994, 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 Parcel No. A33240324803, East Clay Hill
Drive, 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 contaniination, backfilled with
uncontaminated material, and restored to a condition comparable to that which existed
prior to remedial action (Geotech 1996).
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 Parcel No.
A33240324803, East Clay Hill Drive 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 docu-
mentation 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 1996) 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.
This property was assessed with MS01002-VL, therefore, the quantity of material
assessed is not available. During the actual removal process, a total of276 yd3 of con-
taminated earth and uranium mill tailings, 6 to 12 inches deep, were removed from a
1,186 m2 area.
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
representative of the bottom 15-cm (6-in.) soil layers of 15 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
residence ranged from 12 to 13 uR/h. Exterior surface gamma measurements taken from
the excavated areas prior to backfilling ranged from 14 to 21 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 15 exterior verification areas.
Geotech's analysis of these samples showed ^'Ra concentrations ranging from 2.3 to 13.2
pCi/g in the composite sample. ORNL ETS obtained a percentage of these samples and
performed a confirmatory analysis which showed 226Ra concentrations ranging from 4.6
to 8.6 pCi/g. These values are below the EPA standard value of 15 pCi/g for soil layers
> 15 cm below the surface. Gamma ranges and/or soil sample results demonstrate
compliance to the DOE Hot Spot Guidelines for areas <25 m2 (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 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 three months (from March 1,1995 to May 31,1995). The average
annual working level (WL) of radon progeny concentration, as determined by the
TechVOps-Landauer Corporation, was 0.0017, which is well below the 0.03-WL
guideline given in Table 1.
4
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 coriftrmed 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. Areas B and C on this property will be reevaluated with the
Halls Ditch remedial action package for potential recontamination. A letter to this
property file and the Halls Ditch file have been requested by the IVC to provide for this
reevaluation.
5
Table 1. Applicable guidelines for protection against radiation
Mode of exposure Exposure conditions
Radionuclide con-
centrations in soil
Maximum permissible con-
centration of n6Ra in soil
above background levels,
averaged over a 100-m2 area
Radionuclide
concentrations in soil
for Hot Spot areas
Maximum Permissible
concentration of Ra226 in soil
above background level, for
areas less than 25 m2
Guideline value
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
Ra226 concentrations, in any
surface or subsurface area
less than 25 m2, is below the
guideline by a factor of
(100/A)* whereAisthe
area of the elevated region
0.03 WL Exposure to 222Rn Average annual radon proge-
progeny ny concentration (including
background)
(DOE 1990a)
Comparision of soils results for property MS01001
Background of 2 pCi/g has not been removed
Area Soil ORNL 226Ra RAC 226Ra RAC 226Ra
Identifier Ticket # cone. pCi/g cone. pCi/g cone. pCi/g
(OCS) (Lab)
VI NCC981 N/A 5.0
V2 NCC982 6.23 3.9
V3 NCC983 N/A 2.6
V4 NCC984 16.8 11.8
V5 NCC985 7.15 4.7
V6 NCC986 13.4 8.4
V7 NCC987 11.5 8.8
V8 NCC988 * 13.2 16.73
V9 NCC989 2.61 2.3
VIO NCC990 N/A 2.9
VII NCC991 4.59 3.7
V12 NCC992 4.61 3.4
V13 NCC993 N N/A 4.2
V14 NCC994 N 18 11.6
V15 NCC995 8.63 5.0
* ORNL did not receive sufficient sample to analyse
N/A the requested sample was not available from the RAC
Area
Identifier
Comparision of soils results for property MS01001
Background of 2 pCi/g has not been removed
Soil
Ticket*
ORNL 226Ra
cone. pCi/g
RAC 226Ra
cone. pCi/g
(OCS)
RAC 226Ra
cone. pCi/g
(Lab)
VI
V2
V3
V4
V5
V6
V7
V8
V9
VIO
Vll
V12
V13
V14
V15
NCC981
NCC982
NCC983
NCC984
NCC985
NCC986
NCC987
NCC988
NCC989
NCC990
NCC991
NCC992
NCC993
NCC994
NCC995
N/A
6.23
N/A
16.8
7.15
13.4
11.5
2.61
N/A
4.59
4.61
N/A
18
8.63
5.0
3.9
2.6
11.8
4.7
8.4
8.8
13.2
2.3
2.9
3.7
3.4
4.2
11.6
5.0
16.73
* ORNL did not receive sufficient sample to analyse
N/A the requested sample was not available from the RAC
Sheetl Chart 1
15
12
m
• Series 1
m
/
12 15
Page 1
Sheetl Chart 1
• Seriesl
10 11 12 13 14 15
Page 1
6
Table 2. Results of ORNL analysis of Geotech soil samples from
Parcel No. A33240324803, East Clay Hill Drive, Monticello Utah (MS01001-RS)
226Ra concentration (pCi/g)
ORNL Geotech
sample sample Depth ORNL Geotech
No." No.* (cm) •
X2 NCC 982 >15 6.2 3.9
XI1 NCC 991 >15 4.6 3.7
X15 NCC 995 ~- >15 8.6 5.0
" 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 Geotech, and these samples were blended to form a composite soil
sample, which represents an average over one of the verification areas.
REFERENCES
Geotech 1996. Property Completion Report for Monticello Vicinity Property Remedial
Action for DOE ID NO: MS01001-RS, Address: Parcel No. A33240324803, East Clay
Hill Drive, Monticello, Utah 84535, Geotech, Grand Junction, Colorado, February 1996.
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.