W912DR18R0055_-_Attachment_BG_-Tech_Memo_PFOS_PFOA_2_.pdf
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TECHNICAL MEMORANDUM
EMERGING CONTAMINANT SAMPLING
OPERABLE UNITS 6, 7 AND 8
DEFENSE SUPPLY CENTER RICHMOND, VIRGINIA
Prepared For
Defense Logistics Agency
And
Defense Supply Center Richmond
November 2011
TECHNICAL MEMORANDUM
EMERGING CONTAMINANT SAMPLING – OPERABLE UNITS 6, 7 AND 8
DEFENSE SUPPLY CENTER RICHMOND, VIRGINIA
Introduction
This document describes field activities and results of groundwater sampling conducted for emerging contaminants at Operable Units (OUs) 6, 7 and 8 at the Defense Supply Center
Richmond, located near Richmond, Virginia. Defense Supply Center Richmond (the installation) is an approximately 650-acre installation located near Richmond, Virginia and is the
Defense Logistics Agency’s (DLA) aviation demand and supply chain manager. This document was prepared by DLA’s contractor AECOM Technical Services under the Air Force Center for
Engineering and the Environment (AFCEE) Contract Number FA8903-08-D-8770 (Task Order
83).
Background
OU 6 is located in the central portion of the installation and is designated as the groundwater impacted by OU 1 (the Open Storage Area [OSA]), OU 2 (Area 50 Landfill) and
OU 3 (the National Guard Area [NGA]). Final remedies have been implemented at OUs 1, 2 and
3 to address the unacceptable risk posed by soil contamination at these OUs. Past industrial activities in OUs, 1, 2, and 3 have resulted in releases of chemicals into the OU 6 groundwater.
The OSA (OU 1) is located in the west-central portion of the installation. The OSA began operation in 1942 as a storage area for bulk drummed chemicals, the recoupment of liquids from leaking drums, and the repair/replacement of damaged containers. From the late 1950s to the early 1970s, the Area 50 landfill (OU 2) was used as a disposal site for waste (including contaminated and outdated chemicals) and construction debris. The area was originally a ravine that was approximately 800 feet (north to south) by 200 feet (east to west), and 10 feet deep.
While the area was used as a landfill, material was placed in the original ravine and used areas were regraded and revegetated. The potentially hazardous materials disposed of in Area 50 may have included chemicals used in photographic development processes, organic solvents, pesticides and herbicides, acidic and alkaline chemicals, POL, and PCBs. The NGA (OU 3) is a
15-acre area to the east of Area 50 that is covered with buildings, concrete, asphalt paving, and gravel. Vehicle maintenance and support activities for approximately half of the Virginia Army
National Guard units were conducted here. Past activities included parts degreasing and vehicle washdown, using chlorinated organic solvents in some cases.
OU 7 is located in the southern portion of DSCR and designates the area of groundwater impacted by OU 4 (the Fire Training Area [FTA]). OU 13, designated as the Polycyclic
Aromatic Hydrocarbon (PAH) Area, also may have impacted OU 7. At the FTA, three separate, unlined pits were used for firefighting training purposes. Flammable liquid chemicals and petroleum products were dumped into the pits, ignited, and extinguished during the training.
Oils, solvents, pesticides, and herbicides may have been used for fuel at these pits. A time-critical removal action was undertaken during November 2004 to reduce, to the extent practicable, principal threat source material in OU 4 that could contribute to further degradation of OU 7 groundwater.
OU 8 is defined as the groundwater beneath and downgradient of the Acid Neutralization
Pits (ANPs), located in the northern portion of the installation. The ANPs are referred to as
OU 5.
In January 2011, the United States Environmental Protection Agency (USEPA) requested
DLA to perform groundwater sampling at OUs 6 and 7 to evaluate the presence of two emerging contaminants Perfluorooctanesulfonic Acid (PFOS) and Perfluorooctanoic Acid (PFOA). PFOS and PFOA have been detected at fire fighting area sites, landfills, and other Department of
Defense sites. For the installation, groundwater sampling was requested in the source area
(shallow) monitoring wells (OU 6 [landfill] and OU 7[fire fighting training areas]).
Field Activities and Results
In March 2011, groundwater sampling activities were conducted in the shallow (Upper
Water Bearing Unit [WBU] at OU 6 and Lower WBU at OU 7) source area monitoring wells.
The groundwater sampling activities were conducted using low-flow techniques in accordance with the installation Sampling and Analysis Plan (SAP). The groundwater samples were sent to
Columbia Analytical Services (a fixed laboratory) for PFOS and PFOA analyses. Field parameters such as pH, dissolved oxygen, oxidation-reduction potential (ORP) were also measured during the groundwater sampling event. Five monitoring wells at OU 6 and ten monitoring wells at OU 7 were sampled in March 2011. Figures 1 and 2 show the locations of these monitoring wells.
The analytical results were validated in accordance with the laboratories methodology and control limits, while the data qualifiers were applied in accordance with the installation
QAPP. Tables 1 and 2 present the results of the March 2011 sampling. The analytical results were compared to the USEPA provisional health advisory levels (0.2 µg/L for PFOS and 0.4 µg/L for PFOA). As seen from the tables, none of the groundwater analytical results from the
March 2011 sampling event showed PFOS and PFOA results above the provisional health advisory levels. These results were presented to Defense Supply Center Richmond planning team (DLA, USEPA and the Virginia Department of Environmental Quality [VDEQ]) in July
2011. The planning team recommended that one additional sampling round be conducted.
Additional monitoring wells at OU 6 and 7, including wells screened in the deeper WBU, were selected for sampling. In addition, source area wells at OU 8 were also selected for PFOS and
PFOA sampling.
In August 2011, twenty eight monitoring wells at OU 6 (including Upper and Lower
WBU wells), twenty seven monitoring wells at OU 7 (including Lower and Saprolite WBU wells) and five monitoring wells at OU 8 were sampled using low-flow techniques in accordance with the installation SAP. Figures 3 to 7 show the locations of these monitoring wells. The groundwater samples were sent to Test America, Inc., for analyses of PFOS and PFOA. Similar to the March 2011 sampling results, the August 2011 sampling results were validated in accordance with the laboratories methodology and control limits, while the data qualifiers were applied in accordance with the installation QAPP. Tables 3, 4 and 5 present the results of the
August 2011 sampling. The analytical results were compared to the USEPA provisional health advisory levels (0.2 µg/L for PFOS and 0.4 µg/L for PFOA). As seen from the tables, none of the OU 6 and OU 8 groundwater analytical results showed PFOS and PFOA results above the provisional health advisory levels. At OU 7, only well CMT-18-6 showed PFOS concentration
(0.275 µg/L) slightly above the USEPA provisional health advisory level of 0.2 µg/L. The remaining OU 7 wells showed PFOS and PFOA results below the provisional health advisory levels.
Recommendations
Based on the results of the March and August 2011 groundwater sampling events, it appears that PFOS and PFOA contamination at the groundwater OUs at the installation is not a significant issue. Therefore, additional groundwater sampling for PFOS and PFOA at OUs 6, 7 and 8 is not recommended.
Table 1: OU 6 PFOS and PFOA Results - March 2011
Field Sample ID:
Date Collected: Units Provisional
Health Levels
PFOS/PFOA
Perfluorooctylsulfonic Acid (PFOS) ug/L 0.2 0.0051 0.00048 0.0087 0.0031 0.0012 Perfluorooctanoic Acid (PFOA) ug/L 0.4 0.019 0.0011 0.0029 0.015 0.01
Field Parameters
Dissolved Oxygen mg/L Oxidation Reduction Potential mV pH pH units Conductivity mS/cm Temperature ° C Turbidity NTU
18.72 0 125 0 0
15.92 19.56 17.19
0.061 0.031 1.34 3.79
4.46 4.54 4.42 187 304 54 -66
5.58
0 0 0 0 0
9.9 15.25 0.214 5.79 -12
OU6-MW-59
03/18/2011
OU6-MW-60
03/18/2011
OU6-AEHA-28A
03/18/2011
OU6-MW-126
03/18/2011
OU6-MW-132
03/18/2011
Table 2: OU 7 PFOS and PFOA Results - March 2011
Date Collected: Units Provisional
Health Levels
PFOS/PFOA
Perfluorooctylsulfonic Acid (PFOS) ug/L 0.2 0.0081 0.0068 0.0047 0.0033 0.0034 0.0881 0.02 0.0053 Perfluorooctanoic Acid (PFOA) ug/L 0.4 0.0063 0.0095 0.002 0.0031 0.0037 0.091 0.017 0.0093
Field Parameters
Dissolved Oxygen mg/L Oxidation Reduction Potential mV pH pH units Conductivity mS/cm Temperature ° C Turbidity NTU NA 0 5.1 6.2
NA 17.01 18.15 14.2
NA - not analyzed
NA 0.229 0.292 0.375
26.3 0
0.157 0.318
13.05 15.63
NA 0 0 0
NA 144 167 -10
NA 4.63 4.8 5.8
4.05 0 38 -77
6.71 6.64
OU7-MW-36
03/17/2011
OU7-AEHADG-11
03/17/2011
4.3 15.81 0.248
4.04 0.395 15.49
OU7-MW-41
03/17/2011
OU7-MW-46
03/17/2011
OU7-MW-46D
03/17/2011
OU7-MW-48
03/17/2011
OU7-MW-61
03/17/2011
OU7-MW-62
03/17/2011
Table 2: OU 7 PFOS and PFOA Results - March 2011
Date Collected: Units Provisional
Health Levels
PFOS/PFOA
Perfluorooctylsulfonic Acid (PFOS) ug/L 0.2 Perfluorooctanoic Acid (PFOA) ug/L 0.4
Field Parameters
Dissolved Oxygen mg/L Oxidation Reduction Potential mV pH pH units Conductivity mS/cm Temperature ° C Turbidity NTU
NA - not analyzed
0.0021 0.005 0.00068 0.00062
0.015 0.013 0.017 0.013
NA
53.6 17.7 0 NA
14.07 13.99 13.95 0.323
5.56
0 0 NA
136 147 NA
4.75 4.55 NA
0.299 0.137 NA
OU7-MW-96
03/17/2011
OU7-MW-98
03/17/2011
OU7-MWFOS-3
03/17/2011
OU7-MWFOS-3D
03/17/2011
Table 3: OU 6 PFOS and PFOA Results - August 2011
Well ID:
Date Collected:
Sample Type:
Units
Provisional Health Levels
PFOS/PFOA
Perfluorooctane Sulfonate (PFOS) ug/L 0.2 <0.029 U 0.187 <0.03 U <0.029 U <0.03 U <0.029 U <0.029 U <0.03 U <0.029 U <0.028 U Perfluorooctanoic acid (PFOA) ug/L 0.4 0.019 J 0.184 <0.02 U <0.02 U <0.02 U <0.019 U <0.02 U <0.02 U 0.018 J 0.023
Field Parameters
Dissolved Oxygen mg/L Oxidation Reduction Potential mV pH pH units Conductivity mS/cm Temperature ° C Turbidity NTU
0.08 0.231 0.87
OU6-AEHA-27A
8/23/2011 Normal
OU6-AEHA-27B
8/23/2011 Normal
OU6-AEHA-28A
8/23/2011 Normal
OU6-AEHA-28B
8/23/2011 Normal
OU6-AEHA-30B
8/23/2011 Normal
OU6-AEHA-31B
8/23/2011 Normal
OU6-AEHA-31B
8/23/2011 Duplicate
OU6-MW-52
8/23/2011 Normal
OU6-CMT-12-2
8/24/2011 Normal
OU6-CMT-12-2
08/24/2011 Duplicate
0 0 NA10.32
2.4 26.02
5.66
24.6 24.07
5.85
0 0 0 0 0 NA
0.1850.267 0.194 0.37
212 270 24 165 NA 360 171 NA
3.55 3.42 4.94 4.32 NA 2.25 4.66 NA
NA 0.528 NA
26.05 20.43 NA26.31 23.65 24.48 21.5 NA
84.1 27.2 47.7 NA 160 55 NA
NA - not analyzed
U - Undetected: The analyte was analyzed for, but not detected.
J - Estimated: The analyte was positively identified, the quantitation is an estimation due to discrepancies in meeting certain analyte-specific quality control criteria.
12.9
Date Collected:
Sample Type:
Units
Provisional Health Levels
PFOS/PFOA
Perfluorooctane Sulfonate (PFOS) ug/L 0.2 Perfluorooctanoic acid (PFOA) ug/L 0.4
Field Parameters
Dissolved Oxygen mg/L Oxidation Reduction Potential mV pH pH units Conductivity mS/cm Temperature ° C Turbidity NTU
NA - not analyzed
U - Undetected: The analyte was analyzed for, but not detected.
J - Estimated: The analyte was positively identified, the quantitation is an estimation due to discrepancies in meeting certain analyte-specific quality control criteria.
<0.03 U <0.029 U 0.029 J 0.032 <0.03 U <0.03 U <0.03 U <0.03 U 0.015 J <0.03 U <0.029 U <0.028 U <0.028 U
0.032 0.014 J <0.02 U <0.02 U <0.02 0.01 J <0.02 <0.02 U 0.028 <0.02 U <0.019 U 0.017 J 0.013 J
0.848 3.340.068 0.693 0.116 0.049 0.092 0.045 0.042 0.128 0.021 0.03
OU6-MW-125
8/23/2011 Normal
OU6-MW-125
8/23/2011 Duplicate
OU6-MW-126
8/23/2011 Normal
OU6-MW-130
8/23/2011 Normal
OU6-MW-131
8/23/2011 Normal
OU6-MW-132
8/23/2011 Normal
OU6-MW-150
8/24/2011 Normal
OU6-MW-160
8/24/2011 Normal
OU6-MW-166
8/24/2011 Normal
OU6-MW-59
8/24/2011 Normal
OU6-MW-60
8/24/2011 Normal
OU6-EBF-04D
8/24/2011 Normal
OU6-DMW-18A
8/23/2011 Normal
0 0 0 1.1 0 1.930 NA 0 0 1.68
164 122415 -11 17 NA 160 118
1.8 5.77 4.62 NA 4.28
104 13119 196 181
NA
5.31 4.55 5.433.71 6 4.22 4.35 5.19
27.1 20.04
1.5 NA 5 75.2
21.7825.31 27.42 22.2 20.43 21.4120.49 NA 20.87 23.5 25.46
47.2 134 0 25.8431 302 483 25.6 8.7
Date Collected:
Sample Type:
Units
Provisional Health Levels
PFOS/PFOA
Perfluorooctane Sulfonate (PFOS) ug/L 0.2 Perfluorooctanoic acid (PFOA) ug/L 0.4
Field Parameters
Dissolved Oxygen mg/L Oxidation Reduction Potential mV pH pH units Conductivity mS/cm Temperature ° C Turbidity NTU
NA - not analyzed
U - Undetected: The analyte was analyzed for, but not detected.
J - Estimated: The analyte was positively identified, the quantitation is an estimation due to discrepancies in meeting certain analyte-specific quality control criteria.
<0.028 U <0.029 U <0.029 U <0.03 U <0.03 U <0.03 U <0.029 U <0.019 U <0.019 U 0.035 <0.02 U 0.012 J <0.02 U <0.019 U
0.090.931 0.143 3.45 0.133
OU6-MW-94
8/24/2011 Normal
OU6-MW-62
8/24/2011 Normal
OU6-MW-63
8/24/2011 Normal
OU6-MW-69
8/24/2011 Normal
OU6-MW-82
8/23/2011 Normal
OU6-MW-83
8/23/2011 Normal
OU6-MW-87
8/23/2011 Normal
2.82 00 0 0 0 175 275 16740 79 188
4.44 4.45 4.37 4.125.43 5.67
0.089 0.05
24.56 29.65 23.82 26.05
5.55
120 47 16.1 9.5 25.39
84.1 29.5 0
24.76 19.82
Table 4: OU 7 PFOS and PFOA Results - August 2011
Date Collected:
Sample Type:
Units
Provisional Health Levels
PFOS/PFOA
Perfluorooctane Sulfonate (PFOS) ug/L 0.2 0.016 J <0.03 U <0.03 U 0.275 <0.03 U <0.03 U 0.02 J <0.029 U 0.04 0.169 Perfluorooctanoic acid (PFOA) ug/L 0.4 0.014 J 0.014 J <0.02 0.247 <0.02 U 0.023 <0.02 U <0.019 U 0.0098 J 0.183
Field Parameters
Dissolved Oxygen mg/L Oxidation Reduction Potential mV pH pH units Conductivity mS/cm Temperature ° C Turbidity NTU
OU7-AEHADG-10
8/24/2011 Normal
OU7-AEHADG-10
8/24/2011 Duplicate
OU7-AEHADG-11
8/24/2011 Normal
OU7-CMT-18-6
8/26/2011 Normal
OU7-DMW-29B
8/25/2011 Normal
OU7-INJ-106
8/26/2011 Normal
OU7-MW-101
8/26/2011 Normal
OU7-MW-102
8/25/2011 Normal
OU7-MW-116
8/25/2011 Normal
OU7-MW-118
8/25/2011 Normal
21.15 0.767 4.29
0NA 0
NA 419
NA 1.3
NA 0.342
NA
19.2 0.488 3.99
25.13
NA 0
NA
NA
NA
NA
NA
NA
6.76 221 82 329 54 37 4.02 0.156 18.07
0.04
5.7 0.287 23.76
37.6 >800 10.5 1.3
22.3 24.98 24.89
4.69 0 0
2.15 5.12 5.36
0.166 0.4 0.134
Blue highlighting indicates analyte detected above the provisional health levels
J - Estimated: The analyte was positively identified, the quantitation is an estimation due to discrepancies in meeting certain analyte-specific quality control criteria.
NA - not analyzed
U - Undetected: The analyte was analyzed for, but not detected.
Date Collected:
Sample Type:
Units
Provisional Health Levels
PFOS/PFOA
Perfluorooctane Sulfonate (PFOS) ug/L 0.2 Perfluorooctanoic acid (PFOA) ug/L 0.4
Field Parameters
Dissolved Oxygen mg/L Oxidation Reduction Potential mV pH pH units Conductivity mS/cm Temperature ° C Turbidity NTU
Blue highlighting indicates analyte detected above the provisional health levels
J - Estimated: The analyte was positively identified, the quantitation is an estimation due to discrepancies in meeting certain analyte-specific quality control criteria.
NA - not analyzed
U - Undetected: The analyte was analyzed for, but not detected.
0.047 0.028 J <0.031 U 0.045 0.021 J 0.016 J 0.035 0.044 0.014 J 0.021 J 0.026 J 0.035 <0.03 U
0.013 J <0.02 U 0.011 J <0.02 U 0.012 J <0.02 U 0.011 J 0.015 J 0.018 J 0.011 J <0.02 U <0.02 U 0.013 J
NA -25 126 249 114 120 239 397 -10
OU7-MW-42
8/25/2011 Normal
OU7-MW-46
8/26/2011 Normal
OU7-MW-48
8/26/2011 Normal
OU7-MW-61
8/24/2011 Normal
OU7-MW-62
8/24/2011 Normal
OU7-MW-72
8/24/2011 Normal
OU7-MW-74
8/25/2011 Normal
OU7-MW-83
8/25/2011 Normal
OU7-MW-89
8/25/2011 Normal
OU7-MW-120
8/25/2011 Normal
OU7-MW-36
8/26/2011 Normal
OU7-MW-41
8/26/2011 Normal
OU7-MW-119
8/25/2011 Normal
66108 247
3.88 0.36
0 0
23.86 25.45
0 NA 0 00 0 00.38 3.41 5.74 0 0
5.47 NA 5.82 4.315.82 4.2 6.073.1 4.12 3.69 3.85 2.47
0.3 NA 0.525 0.1950.449 0.42 0.1860.355 0.371 0.543 0.325 0.317
19.17 19.77 20.54 21.98 19.5423.95 26.6 NA 22.13 21.81 25.88
20 0 >800 0 0175 0 NA 0 0
Date Collected:
Sample Type:
Units
Provisional Health Levels
PFOS/PFOA
Perfluorooctane Sulfonate (PFOS) ug/L 0.2 Perfluorooctanoic acid (PFOA) ug/L 0.4
Field Parameters
Dissolved Oxygen mg/L Oxidation Reduction Potential mV pH pH units Conductivity mS/cm Temperature ° C Turbidity NTU
Blue highlighting indicates analyte detected above the provisional health levels
J - Estimated: The analyte was positively identified, the quantitation is an estimation due to discrepancies in meeting certain analyte-specific quality control criteria.
NA - not analyzed
U - Undetected: The analyte was analyzed for, but not detected.
0.02 J 0.023 J <0.03 U <0.03 U <0.03 U 0.042
0.014 J <0.02 U 0.012 J <0.02 U 0.011 J 0.01 J
OU7-MW-90
8/25/2011 Normal
OU7-MW-98
8/25/2011 Normal
OU7-MW-99
8/25/2011 Normal
OU7-MWF0S-3
8/25/2011 Normal
OU7-MWFTA-16
8/25/2011 Normal
8069 74 128 121
OU7-MW-89
8/25/2011 Duplicate
NA
NA
NA
NA
NA
NA
0 2.89 0.01 0
5.3 5.17 6.66 4.14
0.128 0.278 0.232 0.093
25.6625.61 27.55 27.81
22.24 6.17 10.76
8.54
17.3 106 186 0
Table 5: OU 8 PFOS and PFOA Results - August 2011
Date Collected:
Sample Type:
Units
Provisional Health Levels
PFOS/PFOA
Perfluorooctane Sulfonate (PFOS) ug/L 0.2 0.033 0.041 J <0.03 U 0.017 J <0.03 U <0.03 U Perfluorooctanoic acid (PFOA) ug/L 0.4 0.011 J 0.014 0.033 0.018 J <0.02 U 0.022
Field Parameters
Dissolved Oxygen mg/L Oxidation Reduction Potential mV pH pH units Conductivity mS/cm Temperature ° C Turbidity NTU
0 0
OU8-DMW-24A
8/26/2011 Normal
4.43 NA 0 4.9
OU8-DMW-24A
8/26/2011 Duplicate
OU8-DMW-30A
8/26/2011 Normal
OU8-DP-11
8/26/2011 Normal
OU8-MW-102
8/26/2011 Normal
OU8-MW-120
8/26/2011 Normal
349567 NA 416 738
0.056
2.64 NA 2.6 2.67 1.64 3.9
22.3318.63 NA 20.66 21.1
J - Estimated: The analyte was positively identified, the quantitation is an estimation due to discrepancies in meeting certain analyte-specific quality control criteria.
NA - not analyzed
U - Undetected: The analyte was analyzed for, but not detected.
24.89
0 NA 0 0 0
0.056 NA 0.125 0.126 0.053
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E:\DSCR\Figures\OU6\Figure_1_OU6_Upper_PFOS_PFOA_Sampling_Locs_March_2011.mxd
OU 6 Upper WBU Wells PFOS/PFOA Sampling
March 2011
DEFENSE SUPPLY
CENTER RICHMOND
RICHMOND, VIRGINIA
Figure
DATE
CHKD
DRAWN
PROJ. NO.
11/22/11
Manish Joshi
Crystal Hardin
60134990
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OU 4
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E:\DSCR\Figures\OU7\Figure_2_OU7_Lower_PFOS_PFOA_Sampling_Locs_March_2011.mxd
0 150 30075 Feet
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0 5025 Feet
Inset 2
OU 7 Lower WBU Wells PFOS/PFOA Sampling
March 2011
DEFENSE SUPPLY
CENTER RICHMOND
RICHMOND, VIRGINIA
Figure
2DRAWN
PROJ. NO.
11/22/11
Manish Joshi
Crystal Hardin
60133594
DATE
CHKD
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Inset 2
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0 2512.5 Feet
0 3015 Feet
E:\DSCR\Figures\OU6\Figure_3_OU6_PFOS_PFOA_Sampling_Locs_August_2011.mxd
OU 6 Upper WBU Wells PFOS/PFOA Sampling
August 2011
DEFENSE SUPPLY
CENTER RICHMOND
RICHMOND, VIRGINIA
Figure
DATE
CHKD
DRAWN
PROJ. NO.
11/22/11
Manish Joshi
Crystal Hardin
60134990
0 250 500125
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0 2512.5 Feet
E:\DSCR\Figures\OU6\Figure_4_OU6_Lower_PFOS_PFOA_Sampling_Locs_August_2011.mxd
0 250 500125 Feet
OU 6 Lower WBU Wells PFOS/PFOA Sampling
August 2011
DEFENSE SUPPLY
CENTER RICHMOND
RICHMOND, VIRGINIA
Figure
DATE
CHKD
DRAWN
PROJ. NO.
11/22/11
Manish Joshi
Crystal Hardin
60133594
Legend
DSCR Boundary
Operable Units
Lower WBU Well
No Name Creek
Buildings
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11274
Warehouse 4 24
OS-2
OS-1
OU 12
OU 4
OU 7
E:\DSCR\Figures\OU7\Figure_5_OU7_Lower_PFOS_PFOA_Sampling_Locs_August_2011.mxd
0 150 30075 Feet
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Inset 2
OU 7 Lower WBU Wells PFOS/PFOA Sampling
August 2011
DEFENSE SUPPLY
CENTER RICHMOND
RICHMOND, VIRGINIA
Figure
5DRAWN
PROJ. NO.
11/22/11
Manish Joshi
Crystal Hardin
60133594
DATE
CHKD
A
A
A
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E:\DSCR\Figures\OU7\Figure_6_OU7_Saprolite_PFOS_PFOA_Sampling_Lcs_August_2011.mxd
0 150 30075 Feet
OU 7 Saprolite WBU Wells PFOS/PFOA Sampling
August 2011
DEFENSE SUPPLY
CENTER RICHMOND
RICHMOND, VIRGINIA
Figure
DATE
CHKD
DRAWN
PROJ. NO.
11/22/11
Manish Joshi
Crystal Hardin
60134990
Legend
Installation Boundary
Operable Units
Kingsland Creek
Buildings
A Saprolite WBU Well
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Inset 1
OU 8 Upper WBU Wells PFOS/PFOA Sampling
August 2011
DEFENSE SUPPLY
CENTER RICHMOND
RICHMOND, VIRGINIA
Figure
7DRAWN
PROJ. NO.
11/22/11
Manish Joshi
Crystal Hardin
60134990
DATE
CHKD
Legend
DSCR Boundary
Operable Units
Upper WBU Well
Buildings
A
<A
Lower WBU Well
K
0 17587.5 Feet
0 4522.5
E:\DSCR\Figures\OU8\Figure_7_OU8_Upper_PFOS_PFOA_Sampling_Locs_August_2011.mxd
File details come from the government source that posted it.