DERR-1991-014034 - 0901a06880540439

DOE ID NO. : MS- QQOfcQ - ^ -S
Property Address: 4 4-^ SooTV> /11a SrVeefj
VICINITY PROPERTY CERTIFICATION SUMMARY AND RECOMMENDATION
SUMMARY EVALUATION
Chem-Nuclear Geotech, Inc.
YES NO NOT TAKEN
Ra-226 is < 5 pCi/g
above background in top
15-cm layer of soil
averaged over 100 m2. [X]* [ ] [ ]
In-situ [X] Lab [ ]
Ra-226 is < 15 pCi/g
above background in any
15-cm layer of soil
more than 15 cm below
the surface averaged
over 100 m2. M [ ] ( ]
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
working levels or, at
most, 0.03 working levels. [><] [ ] [ ]
Supplemental standards were
applied in accordance with
EPA standard 40 CFR 192.21. [ ] [x] [ ]
Hot spot criteria met as
outlined by U.S. DOE
guidelines for FUSRAP and
Decontamination and
Decommissioning [ ] [ ] Cx]
Program (Rev. 03/02/87).
U.S. Department
of Energy (DOE)
YES NO NOT TAKEN
t ] [ ] [ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ 1
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
COMMENTS: *The excavations were backfilled with materials which 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 which do not exceed 30-percent above normal background.
SFCERTIFED SFMS-00068
SCANNED
DFRR - iqqi-Qigong
DOE ID NO. : MS- OOOG8~
CHEM-NUCLEAR GEOTECH, INC., RECOMMENDATION
Based on the Chem-Nuclear Geotech, Inc., evaluation, I recommend this property
for:
[X] Certification by the Department of Energy.
( ] Certification by the Department of Energy with the concurrence of the
Nuclear Regulatory Commission because supplemental standards were
applied per 40 CFR 192.21.
7 Jarry
Decontamination and Decommissioning Program Manager
Chem-Nuclear Geotech, Inc.
*////?/
Date
DOE EVALUATION
[>d Should be certified by the Department of Energy.
[ ] Should be certified by the Department of Energy with the concurrence
of the Nuclear Regulatory Commission because supplemental standards
were applied per 40 CFR 192.21.
Decontamination and Decommissioning Program
Certification Official
Department of Energy
Date
DOE ID NO. MS-00376
232 South 1st East Street
VICINITY PROPERTY SUMMARY EVALUATION AND FINDINGS
1.0 SUMMARY EVALUATION
1.1 EXTERIOR MEASUREMENTS
Inclusion Survey
Chem-Nuclear Geotech
Gamma is > 25 piR/h above
background averaged over
100 m2
Yes
[ ]
No Not Taken*
[X] [ ]
Gamma is < the acceptable
difference or < 20% above
background averaged over [X] [ ] [ ]
100 m2
Radium-226 is > 5 pCi/g
above background in top
15 cm layer averaged over [ ] [X] [ ]
100 m2
Radium-226 is > 15 pCi/g
above background in any
subsurface 15 cm layer [ ] [ ] [X]
averaged over 100 m2
Radium-226 is > 'Hot
Spot' Guidelines [ ] [X] [ ]
1.2 INTERIOR MEASUREMENTS
Gamma is > 20 j/R/h above
background averaged in [ ] [X] [ ]
any room (9.3 m2)
Gamma is < the acceptable
difference or < 20% above [X] [ ] [ ]
background in all rooms
Annual average radon
decay-product concentration [ ] [ ] [X]
is < 0.02 working level
U.S. Department
of Energy (DOE)
Yes No Not Taken*
[ ] [ ] [ ]
[ ] [ ]
[ 3 [ ]
t ] [ ]
[ ] [ 1
[ ]
[ ]
[ ]
[ ] [ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ] [ ]
[ ]
Other:
* Data were not taken because:
[X] Data were not required to derive the findings.
[ ] Property owner did not authorize access for interior sampling.
FIELD ASSESSMENTS SECTION
REPORT OF INCLUSION/EXCLUSION
FOR
BLOCK 13, MS-09013-BK
MONTICELLO, UTAH
MS-00371, MS-00372, MS-00373, MS-00374, MS-00375, MS-00376,
MS-00377, MS-00378, AND MS-00379
Submitted: February 15,1991
Prepared by
CHEM-NUCLEAR GEOTECH, INC.
Grand Junction Projects Office
Grand Junction, Colorado 81502
for the
U.S. DEPARTMENT OF ENERGY
CONTENTS
Report of Radiological Survey
Property/Owner Information
List of Formulas
Tables by Property:
Radiological Screening Survey Results - Exterior Screening
Radiological Screening Survey Results - Interior Screening
Extended Survey Results - Exterior Extended Data
Appendix A - Radiological Assessment
•
DOE ID NO. MS-09013-BK
REPORT OF RADIOLOGICAL SURVEY AT DOE ID NUMBER MS-09013-BK
1.0 INTRODUCTION
A radiological screening survey of DOE ID number MS-09013-BK was conducted by Chem-Nuclear Geotech,
Inc. This survey was conducted using methods, as defined in the Vicinity Properties Management and
Implementation Manual, UMTRA-DOE/AL-050601 (March 1988), the U.S. Department of Energy (DOE)
Guidelines for Residual Radioactive Material at Formerly Utilized Sites Remedial Action Program (FUSRAP),
Revision 2, March 1987, and the Chem-Nuclear Geotech, Inc., Field Assessments Procedures Manual.
In order to simplify and expedite the identification and removal of mill tailings from Monu'cello properties,
the DOE is using a "block" concept for the inclusion surveys and for the cleanup work. All of the properties
in a city block that had not been previously assessed were surveyed sequentially to ensure the properties with
contamination in excess of the Environmental Protection Agency (EPA) standards were identified in a timely
and cost effective manner.
The radiological survey of this block included gamma scans of the entire ground surface (exterior and interior),
samples of exterior soil, and evaluation of historical data when present An assessment was also performed
on this block to determine the aerial and vertical extent of the contamination. The results are shown in the
Appendix A.
2.0 SUMMARY OF RECOMMENDATIONS
The following table lists the recommendation for inclusion or exclusion for each properly investigated in
Block 13:
MONTICELLO, UTAH 84535
DOE ID NUMBER ADDRESS RECOMMENDATION
MS
MS'
MS
MS
MS
MS.
MS
MS
MS
•00371
•00372
•00373
•00374
•00375
•00376
•00377
•00378
•00379
264 South 1st East Street
117 South Main Street
56 East 2nd South Street
20 East 2nd South Street
254 South 1st East Street
232 South 1st East Street
96 East 2nd South Street
80 East 2nd South Street
64 East 2nd South Street
Exclusion
Exclusion
Exclusion
Exclusion
Inclusion
Exclusion
Exclusion
Exclusion
Exclusion
-1-
DOE ID NO. MS-09013-BK
3.0 RESULTS AND CONCLUSIONS
DOE ID NUMBER MS-00372
117 South Main Street
Monticello, Utah 84535
The exterior background gamma exposure rate is 15 uR/h; the interior background gamma exposure rate for
the multi-level brick building is 15 uR/h. Gamma exposure rates are shown in Figure 1, Appendix A.
No exterior elevated gamma exposure rates were found; however, background soil samples were collected at
Location Numbers 4, 5, 6, and 9 (Figure 1, Appendix A). The results of the soil samples are shown in
Table lb, Appendix A.
DOE ID Number MS-00372 Site contains radiation levels which DO NOT EXCEED the
DOE guidelines below:
Recommend: Exclusion
Exterior gamma exposure rate is less than the acceptable
difference or less than 20% above background averaged over
100 m2.
Radium-226 is less than 5.0 pCi/g above background in the
surface 15-cm soil layer averaged over 100 m2.
DOE ID NUMBER MS-00374
20 East 2nd South Street
Monticello, Utah 84535
The exterior background gamma exposure rate is 15 uR/h; the interior background gamma exposure rate for
the single-story brick building is 14 |iR/h. Gamma exposure rates are shown in Figure 1, Appendix A.
No exterior elevated exposure rates were found; however, a background soil sample was collected at
Location Number 11 (Figure 1, Appendix A). The result of the soil sample is shown in Table Ic,
Appendix A.
DOE ID Number MS-00374 Site contains radiation levels which DO NOT EXCEED the
DOE guidelines below:
Recommend: Exclusion
Exterior gamma exposure rate is less than the acceptable
difference or less than 20% above background averaged over
100 m2.
Radium-226 is less than 5.0 pCi/g above background in the
surface 15-cm soil layer averaged over 100 m2.
-2-
•
DOE ID NO. MS-09013-BK
DOE ID NUMBER MS-00373
56 East 2nd South Street
Monticello, Utah 84535
The exterior background gamma exposure rate is 15 tiR/h; the interior background gamma exposure rate for
the two-story block building is 14 \<R/h. Two regions of exterior elevated gamma exposure rates were found
and labeled Regions 1 and 2 (Figure 1, Appendix A).
The soil samples collected from Regions 1 and 2 (Location Numbers 13, 14, and 15, Figure 1, Appendix A)
yielded net area-weighted average radium-226 concentrations of less than 1.0 pCi/g. This value is less than
the EPA guidelines of 5.0 pCi/g above background for surface soil. The results of the soil samples are shown
in Table Id, Appendix A.
DOE ID Number MS-00373 Site contains radiation levels which DO NOT EXCEED the
DOE guidelines below:
Recommend: Exclusion
Radium-226 is less than 5.0 pCi/g above background in the
surface 15-cm soil layer averaged over 100 m2.
DOE ID NUMBER MS-00379
64 East 2nd South Street
Monticello, Utah 84535
The exterior background gamma exposure rate is 14 uR/h; the interior background gamma exposure rate for
the single-story block building is 15 uR/h. Two regions of exterior elevated gamma exposure rates were found
and labeled Regions 2 and 3 (Figure 1, Appendix A).
The soil samples collected from Regions 2 and 3 (Location Numbers 16 and 17, Figure 1, Appendix A) each
yielded a net area-weighted average radium-226 concentration of less than 1.0 pCi/g. This value is less than
the EPA guidelines of 5.0 pCi/g above background for surface soil. The results of the soil samples are shown
in Table le, Appendix A.
Site contains radiation levels which DO NOT EXCEED the
DOE guidelines below:
Exterior gamma exposure rate is less than the acceptable
difference or less than 20% above background averaged over
100 m2.
Radium-226 is less than 5.0 pCi/g above background in the
surface 15-cm soil layer averaged over 100 m2.
DOE ID Number MS-00379
Recommend: Exclusion
-3-
•
DOE ID NO. MS-09013-BK
DOE ID NUMBER MS-00375
254 South 1st East Street
Monticello, Utah 84535
The exterior background gamma exposure rate is 15 jiR/h. There were no habitable structures on this
property. Two regions of exterior elevated gamma exposure rates were found and labeled Regions 4 and 5
(Figure 1, Appendix A).
The soil samples collected from Regions 4 and 5 (Location Numbers 19 and 21, Figure 1, Appendix A) each
yielded a net area-weighted average radium-226 concentration of 1.3pCi/g and less than 1.0 pCi/g,
respectively. These values are less than the EPA guidelines of 5.0 pCi/g above background for surface soil.
However, the soil sample from Region 4 resulted in a net radium-226 concentration of 129.6 pCi/g which
exceeds the surface 'Hot Spot' Guideline of 50.0 pCi/g for a 1.0 m2 area. The results of the soil samples are
shown in Table If, Appendix A.
DOE ID Number MS-00375 Site contains radiation levels which EXCEED the DOE
guidelines below:
Recommend: Inclusion
Radium-226 exceeds the 'Hot Spot' Guidelines.
DOE ID NUMBER MS-00378
80 East 2nd South Street
Monticello, Utah 84535
The exterior background gamma exposure rate is 15 uR/h; the interior background gamma exposure rate for
the two-story frame house is 15 uR/h. Gamma exposure rates are shown in Figure 1, Appendix A.
No exterior elevated gamma exposure rates were found; however, two background soil samples were collected
at Location Numbers 22 and 23 (Figure 1, Appendix A). The results of the soil samples are shown in
Table Ig, Appendix A.
DOE ID Number MS-00378 Site contains radiation levels which DO NOT EXCEED the
DOE guidelines below:
Recommend: Exclusion
Exterior gamma exposure rate is less than the acceptable
difference or less than 20% above background averaged over
100 m2.
Radium-226 is less than 5.0 pCi/g above background in the
surface 15-cm soil layer averaged over 100 m2.
-4-
DOE ID NO. MS-09013-BK
DOE ID NUMBER MS-00371
264 South 1st East Street
Monticello, Utah 84535
The exterior background gamma exposure rate is 16 piR/h; the interior background gamma exposure rate for
the single-story brick building is 15 uR/h. Two regions of exterior elevated gamma exposure rates were found
and labeled Regions 6 and 7 (Figure 1, Appendix A).
The soil samples collected from Regions 6 and 7 (Location Numbers 25 and 27, Figure 1, Appendix A) each
yielded a net area-weighted average radium-226 concentration of less than 1.0 pCi/g. This value is less than
the EPA guidelines of 5.0 pCi/g above background for surface soil. The results of the soil samples are shown
in Table lh. Appendix A.
DOE ID Number MS-00371 Site contains radiation levels which DO NOT EXCEED the
DOE guidelines below:
Recommend: Exclusion
Exterior gamma exposure rate is less than the acceptable
difference or less than 20% above background averaged over
100 m2.
Radium-226 is less than 5.0 pCi/g above background in the
surface 15-cm soil layer averaged over 100 m2.
DOE ID NUMBER MS-00376
232 South 1st East Street
Monticello, Utah 84535
The exterior background gamma exposure rate is 15 uR/h; the interior background gamma exposure rate for
the two-story metal and stucco building is 13 |iR/h. Gamma exposure rates are shown in Figure 1,
Appendix A.
No exterior elevated gamma exposure rates were found; however two background soil samples were collected
at Location Numbers 28 and 29 (Figure 1, Appendix A). The results of the soil samples are shown in
Table li, Appendix A.
I
I
l
-5-
DOE ID NO. MS-09013-BK
DOE ID Number MS-00376 Site contains radiation levels which DO NOT EXCEED the
DOE guidelines below:
Recommend: Exclusion
Exterior gamma exposure rate is less than the acceptable
difference or less than 20% above background averaged over
100 m2.
Radium-226 is less than 5.0 pCi/g above background in the
surface 15-cm soil layer averaged over 100 m2.
DOE ID NUMBER MS-00377
96 East 2nd South Street
Monticello, Utah 84535
The exterior background gamma exposure rate is 16 uJR/h; the interior background gamma exposure rate for
the two-story brick and stucco building is 14 |iR/h. Gamma exposure rates are shown in Figure 1,
Appendix A.
No exterior elevated gamma exposure rales were found; however, two background soil samples were collected
at Location Numbers 30 and 31 (Figure 1, Appendix A). The results of the soil samples are shown in
Table lj, Appendix A.
DOE ID Number MS-00377 Site contains radiation levels which DO NOT EXCEED the
DOE guidelines below:
Recommend: Exclusion
Exterior gamma exposure rate is less than the acceptable
difference or less than 20% above background averaged over
100 m2.
Radium-226 is less than 5.0 pCi/g above background in the
surface 15-cm soil layer averaged over 100 m2.
-6-
PROPERTY/OWNER INFORMATION
BLOCK 13, MONTICELLO, UTAH
Page 1 of 5
DOE ID NUMBER: MS-00372
PROPERTY LOCATION:
PROPERTY OWNER:
OWNER ADDRESS:
TELEPHONE NUMBER:
OCCUPANT/TENANT:
TELEPHONE NUMBER:
117 South Main Street, Monticello, Utah
San Juan County
Same
[phone]
Same
Same
PROPERTY CLASSIFICATION: Jail
TOTAL AREA OF PROPERTY: 11,247 m2
STRUCTURES ON PROPERTY: A multi-level brick building
. 4
IT
MS-00372 Looking northeast MS-00374 Looking southeast
DOE ID NUMBER: MS-00374
PROPERTY LOCATION:
PROPERTY OWNER:
OWNER ADDRESS:
TELEPHONE NUMBER:
OCCUPANT/TENANT:
TELEPHONE NUMBER:
20 East 2nd South Street, Monticello, Utah

None
None
PROPERTY CLASSIFICATION: Commercial Structure
TOTAL AREA OF PROPERTY: 112 m2-
STRUCTURES ON PROPERTY: A single-story brick building
PROPERTY/OWNER INFORMATION
BLOCK 13, MONTICELLO, UTAH
Page 2 of 5
DOE ID NUMBER: MS-00373
PROPERTY LOCATION: 56 East 2nd South Street, Monucello, Utah
PROPERTY OWNER:

OCCUPANT/TENANT: None
TELEPHONE NUMBER: None
PROPERTY CLASSIFICATION: Commercial Structure
TOTAL AREA OF PROPERTY: 1,015 m2
STRUCTURES ON PROPERTY: A two-story block building
MS-00373 East side of Block Building
Looking south
MS-00373 West side of Block Building
Looking south
PROPERTY/OWNER INFORMATION
BLOCK 13, MONTICELLO, UTAH
Page 3 of 5
DOE ID NUMBER: MS-00379
PROPERTY LOCATION:
PROPERTY OWNER:
OWNER ADDRESS:
TELEPHONE NUMBERS:
OCCUPANT/TENANT:
TELEPHONE NUMBER:
PROPERTY CLASSIFICATION:
TOTAL AREA OF PROPERTY:
STRUCTURES ON PROPERTY:
64 East 2nd South Street

Commercial Structure
798 m2
A single-story block building
as*
,.•.,.<»«•.•«...... i
asa«
• — s . »j! 1"
SK9S
IK*!
MS-00379 Looking south MS-00375 Looking west
DOE ID NUMBER: MS-00375
PROPERTY LOCATION:
PROPERTY OWNER:
OWNER ADDRESS:
TELEPHONE NUMBER:
OCCUPANT/TENANT:
TELEPHONE NUMBER:
PROPERTY CLASSIFICATION: Vacant Lot
TOTAL AREA OF PROPERTY: 1,296 m2
STRUCTURES ON PROPERTY: None
254 South 1st East Street, Monticello, Utah

Vacant Lot
N/A
PROPERTY/OWNER INFORMATION
BLOCK 13, MONTICELLO, UTAH
Pase 4 of 5
DOE ID NUMBER: MS-00378
80 East 2nd South Street, Monticello, Utah

None
None
PROPERTY LOCATION:
PROPERTY OWNER:
OWNER ADDRESS:
TELEPHONE NUMBER:
OCCUPANT/TENANT:
TELEPHONE NUMBER:
PROPERTY CLASSIFICATION: Residence
TOTAL AREA OF PROPERTY: 1,252 m2
STRUCTURES ON PROPERTY: A two-story frame house and a frame shed
Sis*™
MS-00378 Looking southwest MS-00371 Looking southwest
DOE ID NUMBER: MS-00371
PROPERTY LOCATION:
PROPERTY OWNER:
OWNER ADDRESS:
TELEPHONE NUMBER:
OCCUPANT/TENANT:
TELEPHONE NUMBER:
264 South 1st East Street, Monticello, Utah

None
None
PROPERTY CLASSIFICATION: Commercial Structure
TOTAL AREA OF PROPERTY: 1,645 m2
STRUCTURES ON PROPERTY: A single-story brick building
PROPERTY/OWNER INFORMATION
BLOCK 13, MONTICELLO, UTAH
Page 5 of 5
DOE ID NUMBER: MS-00376
232 Souih 1st East Street, Monticello, Utah

None
None
PROPERTY LOCATION:
PROPERTY OWNER:
OWNER ADDRESS:
TELEPHONE NUMBER:
OCCUPANT/TENANT:
TELEPHONE NUMBER:
PROPERTY CLASSIFICATION: Apartment
TOTAL .AREA OF PROPERTY: 295 m2
STRUCTURES ON PROPERTY: A two-story metal and stucco building
2$
MS-00376 Looking west MS-00377 Looking south
DOE ID NUMBER: MS-00377
PROPERTY LOCATION:
PROPERTY OWNER:
OWNER ADDRESS:
TELEPHONE NUMBER:
OCCUPANT/TENANT:
TELEPHONE NUMBER:
96 East 2nd South Street, Monticello, Utah

None
None
PROPERTY CLASSIFICATION: Apartment
TOTAL AREA OF PROPERTY: 342 m*
STRUCTURES ON PROPERTY: A two-story brick and stucco building
LIST OF FORMULAS Page 1 of 1
The following is list of forumlas used in the tables for each property. :
Formula used to calculate the net estimated area-weighted average gamma exposure rate for exterior screening:
GAW = the area-weighted average gamma exposure rate (uR/h)
G; = a series of average gamma exposure rates less background (tiR/h)
Ai = a series of areas within regions of contamination (m2)
100 = threshold area (m2)
Formula used to calculate the net estimated area-weighted average gamma expsoure rate for interior screening:
G^, = the area-weighted average gamma exposure rate QiR/h)
Gj = a series of average gamma exposure rates less background (pR/h)
Ai = a series of areas within regions of contamination (m2)
9.3 = threshold area (m2)
Formula used to calculate the net estimated area-weighted average radium-226 concentration in soil (pCi/g):
Cxw = the area-weighted average radium-226 concentration (pCi/g)
Ci = a series of average radium-226 concentrations less background (pCi/g)
Ai = a series of areas within regions of contamination (m2)
D;. = a series of depths of samples (m)
100 = the area used in averaging (m2)
0.15 = the depth of sample used in averaging (m)
Formula used to calculate the Hot Spot Guideline:
100 mz
HSL = the Hot Spot Guideline Limit (pCi/g)
Cm = the maximum allowable radium concentration for this site
(5.0 pCi/g for surface soil and 15.0 pCi/g for subsurface soil)
A = the area of the Hot Spot (m2)
Block 13
DOE ID NUMBER MS-00372
117 South Main Street
Monticello, Utah 84535 Page 1 of 9
RADIOLOGICAL SCREENING SURVEY RESULTS
EXTERIOR SCREENING
MEAN BACKGROUND EXPOSURE RATE: 15uR/h
BACKGROUND PLUS 20 PERCENT: 18 jiR/h
EXPOSURE-RATE RANGE IN CONTAMINATED REGIONS: None
REGION OF HIGHEST EXTERIOR GAMMA EXPOSURE RATE: General 15 n-R/h
POINT SOURCES (Discussed in Section 3.0): None
ESTIMATED AREA OF EXTERIOR CONTAMINATION BY REGION: Om2
NET ESTIMATED AREA-WEIGHTED AVERAGE BY REGION: 0u.R/h
RADIOLOGICAL SCREENING SURVEY RESULTSi 7
STRUCTURE DESCRIPTION OR NUMBER: Multi-Level Brick Building
MEAN BACKGROUND EXPOSURE RATE: 15 u.R/h
BACKGROUND PLUS 20 PERCENT: 18 uR/h
REGION OF HIGHEST INTERIOR GAMMA EXPOSURE RATE: General 15 u.R/h
POINT SOURCES (Discussed in Section 3.0): None
NET ESTIMATED AREA-WEIGHTED AVERAGE: 0u.R/h
111 RADto
SAMPLE LOCATION NUMBER:
REGION SAMPLED: Bkgrd
SAMPLE DEPTH (cm): 15
RADIUM-226 CONCENTRATION (pCi/g): 1.4 2.1 2.1 1.4
REPRESENTATIVE (biased) SAMPLING AREA (m2): >100
NET ESTIMATED AREA-WEIGHTED AVERAGE (pCi/g): N/A
HOT SPOT GUIDELINE (pCi/g): N/A
•
Block 13
DOE ID NUMBER MS-00374
20 East 2nd South Street
Monticello, Utah 84535 Page 2 of 9
RADIOLOGICAL1 SCREENING SURVEY RESULTS
J ; EXTERIOR SCREENING
MEAN BACKGROUND EXPOSURE RATE: 15 u.R7h
BACKGROUND PLUS 20 PERCENT: 18 uR/h
EXPOSURE-RATE RANGE IN CONTAMINATED REGIONS: None
REGION OF HIGHEST EXTERIOR GAMMA EXPOSURE RATE: General 15u,R/h
POINT SOURCES (Discussed in Section 3.0): None
ESTIMATED AREA OF EXTERIOR CONTAMINATION BY REGION: 0 m2
NET ESTIMATED AREA-WEIGHTED AVERAGE BY REGION: 0 U-R/h
RADIOLOGICAL SCREENING SURVEY RESULTS
^ : INTERIOR SCREENING ^
STRUCTURE DESCRIPTION OR NUMBER: Single-Story Brick Building
MEAN BACKGROUND EXPOSURE RATE: 14 uR/h
BACKGROUND PLUS 20 PERCENT: 17u.R/h
REGION OF HIGHEST INTERIOR GAMMA EXPOSURE RATE: General 15jiR/h
POINT SOURCES (Discussed in Section 3.0): None
NET ESTIMATED AREA-WEIGHTED AVERAGE: 0 u.R/h
• RADIOLC^CALSCREENINGSURVEY RESULTS-M
SAMPLE LOCATION NUMBER: 11
REGION SAMPLED: Bkgrd
SAMPLE DEPTH (cm): 15
RADIUM-226 CONCENTRATION (pCi/g): 1.5
REPRESENTATIVE (biased) SAMPLING AREA (m2): >100
NET ESTIMATED AREA-WEIGHTED AVERAGE (pCi/g): N/A
HOT SPOT GUIDELINE (pCi/g): N/A
•
DOE ID NUMBER MS-00373
56 East 2nd South Street
Block 13 Monticello, Utah 84535 Page 3 of 9
RADIOLOGICAL SCREENING SURVEY RESULTS
^ ;M::Ji;: EXTERIOR SCREENING ? v :
MEAN BACKGROUND EXPOSURE RATE: 15 M-R/h
BACKGROUND PLUS 20 PERCENT: 18uR/h
EXPOSURE-RATE RANGE IN CONTAMINATED REGIONS: Region 1
Region 2
18 u.R/h
18-21 uR/h
REGION OF HIGHEST EXTERIOR GAMMA EXPOSURE RATE: Region 2 21 uR/h
POINT SOURCES (Discussed in Section 3.0): None
ESTIMATED AREA OF EXTERIOR CONTAMINATION BY REGION: Region 1
Region 2
2.8 nf
20.7 m2
NET ESTIMATED AREA-WEIGHTED AVERAGE BY REGION: Region 1 <1 n-R/h
Region 2 6u.R/h
! RADIOLOGICAL SCREENING SURVEY RESULTS
STRUCTURE DESCRIPTION OR NUMBER: Two-Story Block Building
MEAN BACKGROUND EXPOSURE RATE: 14uR/h
BACKGROUND PLUS 20 PERCENT: 17u.R/h
REGION OF HIGHEST INTERIOR GAMMA EXPOSURE RATE: General 16u.R/h
POINT SOURCES (Discussed in Section 3.0): None
NET ESTIMATED AREA-WEIGHTED AVERAGE: 0u.Fl/h
;^ RADIOLOGICAL SCREENING SURVEY RESULTS
EXTERIOR EXTEND ED 'DATA *
SAMPLE LOCATION NUMBER: 13 14 15 12
REGION SAMPLED: Bkgrd
SAMPLE DEPTH (cm): 15
RADIUM-226 CONCENTRATION (pCi/g): 1.5 1.2 2.7 1.4
REPRESENTATIVE (biased) SAMPLING AREA (m2): 2.8 20.7 N/A
NET ESTIMATED AREA-WEIGHTED AVERAGE (pCi/g): <1.0 N/A
HOT SPOT GUIDELINE (pCi/g): N/A
Block 13
DOE ID NUMBER MS-00379
64 East 2nd South Street
Monticello, Utah 84535 Page 4 of 9
RADIOLO^CAL SCREENING SURVEY RESULTS: ?
MEAN BACKGROUND EXPOSURE RATE: 14 uR/h
BACKGROUND PLUS 20 PERCENT: 17uR/h
EXPOSURE-RATE RANGE IN CONTAMINATED REGIONS: Region 2
Region 3
18-21 uR/h
63 u.R/h
REGION OF HIGHEST EXTERIOR GAMMA EXPOSURE RATE: Region 3 63 uR/h
POINT SOURCES (Discussed in Section 3.0): None
ESTIMATED AREA OF EXTERIOR CONTAMINATION BY REGION: Region 2
Region 3
9.8 m2
< 1.0 m2
NET ESTIMATED AREA-WEIGHTED AVERAGE BY REGION: Region 2 < 1 uR/h
Region 3 < 1 u,R/h
yNTERICfl SCREENING!
STRUCTURE DESCRIPTION OR NUMBER: Single-Story Block Building
MEAN BACKGROUND EXPOSURE RATE: 15u.R/h
BACKGROUND PLUS 20 PERCENT: 18u.R/h
REGION OF HIGHEST INTERIOR GAMMA EXPOSURE RATE: General 17u.R/h
POINT SOURCES (Discussed in Section 3.0): None
NET ESTIMATED AREA-WEIGHTED AVERAGE: 0u.R/h
EXTENDED SURVEY RESULTS;
EXTERIOR EXTENDED DATA
SAMPLE LOCATION NUMBER: 16 17 18
REGION SAMPLED: Bkgrd
SAMPLE DEPTH (cm): 15
RADIUM-226 CONCENTRATION (pCi/g): 1.9 32.3 1.4
REPRESENTATIVE (biased) SAMPLING AREA (m2): 9.8 <1.0 N/A
NET ESTIMATED AREA-WEIGHTED AVERAGE (pCi/g): <1.0 N/A
HOT SPOT GUIDELINE (pCi/g): N/A
Block 13
DOE ID NUMBER MS-00375
254 South 1st East Street
Monticello, Utah 84535 Page 5 of 9
EXTERIOR SCREENING
MEAN BACKGROUND EXPOSURE RATE: 15 uR/h
BACKGROUND PLUS 20 PERCENT: 18 uR/h
EXPOSURE-RATE RANGE IN CONTAMINATED REGIONS: Region 4
Region 5
18-44 uR'h
18 uR/h
REGION OF HIGHEST EXTERIOR GAMMA EXPOSURE RATE: Region 4 44 uR/h
POINT SOURCES (Discussed in Section 3.0): None
ESTIMATED AREA OF EXTERIOR CONTAMINATION BY REGION: Region 4
Region 5
< 1.0 m2
< 1.0 m2
NET ESTIMATED AREA-WEIGHTED AVERAGE BY REGION: Region 4
Region 5
< 1 u.R/h
< 1 u.R/h
RADIOLOGICAL SCREENING SURVEY RESULTS
111111M
STRUCTURE DESCRIPTION OR NUMBER: Vacant Lot
MEAN BACKGROUND EXPOSURE RATE: N/A
BACKGROUND PLUS 20 PERCENT: N/A
REGION OF HIGHEST INTERIOR GAMMA EXPOSURE RATE: N/A
POINT SOURCES (Discussed in Section 3.0): N/A
NET ESTIMATED AREA-WEIGHTED AVERAGE: N/A
•EXTENDED SURVEYRESULTS-i
1 EXTEfflOR EXtEN0ED;DATA«
SAMPLE LOCATION NUMBER: 19 21 20
REGION SAMPLED: Bkgrd
SAMPLE DEPTH (cm) 15
RADIUM-226 CONCENTRATION (pCi/g): 131.6 5.1 3.3
REPRESENTATIVE (biased) SAMPLING AREA (m2): <1.0 >100
NET ESTIMATED AREA-WEIGHTED AVERAGE (pCi/g): 1.3 <1.0 N/A
HOT SPOT GUIDELINE (pCi/g): 50.0 N/A
Block 13
DOE ID NUMBER MS-00378
80 East 2nd South Street
Monticello, Utah 84535 Page 6 of 9
RADIOLOGICAL SCREENING SURVEY RESULTS
;7 !r : ^ErtOH SCREENING
MEAN BACKGROUND EXPOSURE RATE: 15 uR/h
BACKGROUND PLUS 20 PERCENT: 18u.R'h
EXPOSURE-RATE RANGE IN CONTAMINATED REGIONS: None
REGION OF HIGHEST EXTERIOR GAMMA EXPOSURE RATE: General 15 p.Fi/h
POINT SOURCES (Discussed in Section 3.0): None
ESTIMATED AREA OF EXTERIOR CONTAMINATION BY REGION: Onf
NET ESTIMATED AREA-WEIGHTED AVERAGE BY REGION: 0 u.R/h
RADIOLOGICAL SCREENING SURVEY RESULTS::
::i/INTERIOR SCREENING/
STRUCTURE DESCRIPTION OR NUMBER: Two-Story Frame House
MEAN BACKGROUND EXPOSURE RATE: 15u.R/h
BACKGROUND PLUS 20 PERCENT: 18u\R/h
REGION OF HIGHEST INTERIOR GAMMA EXPOSURE RATE: General 16u.R/h
POINT SOURCES (Discussed in Section 3.0): None
NET ESTIMATED AREA-WEIGHTED AVERAGE: 0|iR/ri
vEXTENbED^SORVEY; RESULTS
K EXTERIOR-EnENDEb DATA):
SAMPLE LOCATION NUMBER: 22 23
REGION SAMPLED: Bkgrd
SAMPLE DEPTH (cm): 15
RADIUM-226 CONCENTRATION (pCi/g): 3.2 2.8
REPRESENTATIVE (biased) SAMPLING AREA (nf): >100
NET ESTIMATED AREA-WEIGHTED AVERAGE (pCi/g): N/A
HOT SPOT GUIDELINE (pCi/g): N/A
Block 13
DOE ID NUMBER MS-00371
264 South 1st East Street
Monticello, Utah 84535 Page 7 of 9
EXTERIOR SCREENING:
MEAN BACKGROUND EXPOSURE RATE: 16 jxR/h
BACKGROUND PLUS 20 PERCENT: 19 u.R'h
EXPOSURE-RATE RANGE IN CONTAMINATED REGIONS: Region 6
Region 7
18-37 uR/h
18uR/h
REGION OF HIGHEST EXTERIOR GAMMA EXPOSURE RATE: Region 6 37 uR/h
POINT SOURCES (Discussed in Section 3.0): None
ESTIMATED AREA OF EXTERIOR CONTAMINATION BY REGION: Region 6
Region 7
2.5 m2
1.5 m2
NET ESTIMATED AREA-WEIGHTED AVERAGE BY REGION: Region 6
Region 7
<1 u.R/h
<1 u.R/h
; RADIOLOGIC*!! SCREENING SURVEY RESULTS
liiii^
STRUCTURE DESCRIPTION OR NUMBER: Single-Story Brick Building
MEAN BACKGROUND EXPOSURE RATE: 15 u,R/h
BACKGROUND PLUS 20 PERCENT: 19u.R/h
REGION OF HIGHEST INTERIOR GAMMA EXPOSURE RATE: General 16u.R/h
POINT SOURCES (Discussed in Section 3.0): None
NET ESTIMATED AREA-WEIGHTED AVERAGE: 0 u.R/h
ii: EXTENDED SURVEY: RESULTS!
aE^fflOREXTENDED DATA:1!
SAMPLE LOCATION NUMBER: 25 27 26
REGION SAMPLED: Bkgrd
SAMPLE DEPTH (cm): 15
RADIUM-226 CONCENTRATION (pCi/g): 4.1 2.5 3.0
REPRESENTATIVE (biased) SAMPLING AREA (m2): 2.5 1.5 >100
NET ESTIMATED AREA-WEIGHTED AVERAGE (pCi/g): <1.0 N/A
HOT SPOT GUIDELINE (pCi/g): N/A
•
Block 13
DOE ID NUMBER MS-00376
232 South 1st East Street
Monticello, Utah 84535 Page 8 of 9
RADIOLOGICAL SCREENING SURVEY RESULTS: L
; ; EXTERIOR SCRE
MEAN BACKGROUND EXPOSURE RATE: 15 jxR/h
BACKGROUND PLUS 20 PERCENT: 18 uR/h
EXPOSURE-RATE RANGE IN CONTAMINATED REGIONS: None
REGION OF HIGHEST EXTERIOR GAMMA EXPOSURE RATE: General 15 jxR/h
POINT SOURCES (Discussed in Section 3.0): None
ESTIMATED AREA OF EXTERIOR CONTAMINATION BY REGION: Onf
NET ESTIMATED AREA-WEIGHTED AVERAGE BY REGION: OuR/h
:: RADIOLOGICAL SCREENING:SURVEY RESULTS;:
STRUCTURE DESCRIPTION OR NUMBER: Two-Story Metal and
Stucco Building
MEAN BACKGROUND EXPOSURE RATE: 13u.R/h
BACKGROUND PLUS 20 PERCENT: 16u,R/h
REGION OF HIGHEST INTERIOR GAMMA EXPOSURE RATE: General 14 u.R/h
POINT SOURCES (Discussed in Section 3.0): None
NET ESTIMATED AREA-WEIGHTED AVERAGE: OuR/h
/EXTENDED SURVEyiRESULtS;:
! EXTERIOR EXTENDED DATA/
SAMPLE LOCATION NUMBER: 28 29
REGION SAMPLED: Bkgrd
SAMPLE DEPTH (cm): 15
RADIUM-226 CONCENTRATION (pCi/g): 3.4 1.6
REPRESENTATIVE (biased) SAMPLING AREA (nf): >100
NET ESTIMATED AREA-WEIGHTED AVERAGE (pCi/g): N/A
HOT SPOT GUIDELINE (pCi/g): N/A
Block 13
DOE ID NUMBER MS-00377
96 East 2nd South Street
Monticello, Utah 84535 Page 9 of 9
- EXTERIOR SCREENING ;
MEAN BACKGROUND EXPOSURE RATE: 17uR/h
BACKGROUND PLUS 20 PERCENT: 20 uR/h
EXPOSURE-RATE RANGE IN CONTAMINATED REGIONS: None
REGION OF HIGHEST EXTERIOR GAMMA EXPOSURE RATE: General 17 u.R/h
POINT SOURCES (Discussed in Section 3.0): None
ESTIMATED AREA OF EXTERIOR CONTAMINATION BY REGION: Onf
NET ESTIMATED AREA-WEIGHTED AVERAGE BY REGION: 0u.R/h
RADIOLOGICAL SCREENING SURVEY RESULTS//:
||||||»
STRUCTURE DESCRIPTION OR NUMBER: Two-Story Brick and
Stucco Building
MEAN BACKGROUND EXPOSURE RATE: 14u.R/h
BACKGROUND PLUS 20 PERCENT: 17u.R/h
REGION OF HIGHEST INTERIOR GAMMA EXPOSURE RATE: General 15 jiR/h
POINT SOURCES (Discussed in Section 3.0): None
NET ESTIMATED AREA-WEIGHTED AVERAGE: 0u,R/h
EXTENDED SURVEY RESULTS
£ EXTERIOR EXTENDED^ DAT A/'
SAMPLE LOCATION NUMBER: 30 31
REGION SAMPLED: Bkgrd
SAMPLE DEPTH (cm): 15
RADIUM-226 CONCENTRATION (pCi/g): 5.0 4.6
REPRESENTATIVE (biased) SAMPLING AREA (m2): >100
NET ESTIMATED AREA-WEIGHTED AVERAGE (pCi'g): N/A
HOT SPOT GUIDELINE (pCi/g): N/A