W912DR18R0055_-_Attachment_Z_-_DSCR_2017_OU_8_GWMR_Tables.pdf

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Table 2-1 OU 8 Groundwater Sampling and Analysis Plan (April/October 2017)

2017 Annual OU 8 Groundwater Monitoring Report Defense Supply Center Richmond

Richmond, Virginia

Well ID Semi-Annual (Fall)

Quarterly (Fenceline)

VOCs 8260B

TOC

9060A

Common Anions 9056A

Dissolved Gases

RSK-175

SVOCs 8270D

Metals

6010LL/7470

PAHs 8270D

Pesticides 8081B

PCBs 8082A

OU8 - Upper WBU Wells

DMW-23A X X X X X

DMW-24A X X X X X

DMW-30A X X X X X

DP-11 X X X X X

DP-12 X X X X X

DP-2 X X X X X

DP-6 X X X X X

MWANP-1 X X X X X

MWANP-11 X X X X X

MWANP-13 X X X X X

MWANP-15 X X X X

MWANP-16* X X X X X X

MWANP-171 X X X X X

MWANP-18 X X X X X

MWANP-19* X X X X X X

MWANP-20* X X X X X X

MWANP-23 X X X X X

MWANP-24 X X X X

MWANP-25 X X X X

MWANP-26 X X X X X

MWANP-27 X X X X X

MWANP-3 X X X X X

OS72-MW1 X X X X

OU8-MW-100* X X X X X X

OU8-MW-102 X X X X X X X X X X

OU8-MW-103 X X X X X

OU8-MW-104 X X X X X

OU8-MW-105 X X X X X

OU8-MW-106 X X X X X

OU8-MW-108 X X X X X

OU8-MW-112* X X X X X X

OU8-MW-113 X X X X X

OU8-MW-114* X X X X X X

OU8-MW-115 X X X X X

OU8-MW-116 X X X X X

OU8-MW-117 X X X X X

OU8-MW-118 X X X X X

OU8-MW-119 X X X X X

OU8-MW-120 X X X X X X X X X X

OU8-MW-121 X X X X X

OU8-MW-122 X X X X X

OU8-MW-123 X X X X X X X X X X

Notes:

VOCs - Volatile Organic Compounds TOCs - Total Organic Carbon Common anions include Chloride (Cl) and Sulfate (SO4) Dissolved Gases include Methane, Ethane, and Ethene SVOCs - Semi-Volatile Organic Compounds PAHs - Polyaromatic Hydrocarbons PCBs - Polychlorinated Biphenyls *Monitoring well samples quarterly as part of fenceline monitoring 1EVO in well at time of sampling.

02118201.0001 1 of 2

Table 2-1 OU 8 Groundwater Sampling and Analysis Plan (April/October 2017)

2017 Annual OU 8 Groundwater Monitoring Report Defense Supply Center Richmond

Richmond, Virginia

Well ID Semi-Annual (Fall)

Quarterly (Fenceline)

VOCs 8260B

TOC

9060A

Common Anions 9056A

Dissolved Gases

RSK-175

SVOCs 8270D

Metals

6010LL/7470

PAHs 8270D

Pesticides 8081B

PCBs 8082A

OU8-MW-124 X X X X X X X X X X

OU8-MW-125* X X X X X X

OU8-MW-126* X X X X X X

OU8-MW-127* X X X X X X

OU8-MW-128* X X X X X X

OU8-MW-130* X X X X X X

OU8-MW-131* X X X X X X

OU8-MW-132* X X X X X X

OU8-MW-133* X X X X X X

OU8-MW-134* X X X X X X

OU8-MW-145* X X X X X X

OU8-MW-146* X X X X X X

OU8-MW-147* X X X X X X

OU8-MW-148* X X X X X X

OU8-MW-149 X X X X X

OU8-MW-156* X X X X X X

OU8-MW-157* X X X X X X

OU8-MW-158* X X X X X X

OU8-MW-159* X X X X X X

OU8-MW-160* X X X X X X

OU8-MW-161* X X X X X X

OU8-MW-50 X X X X X X X X X X

OU8-MW-67 X X X X X X X X X X

OU8-MW-68 X X X X X

OU8-MW-72 X X X X X

OU8-MW-75 X X X X X

OU8-MW-88 X X X X X

OU8-MW-89 X X X X X

OU8-MW-90 X X X X X

OU8-MW-91* X X X X X X

OU8-MW-92 X X X X X

OU8-MW-93 X X X X

OU8-MW-94* X X X X X X

OU8-MW-95* X X X X X X

OU8-MW-96* X X X X X X

OU8-MW-97* X X X X X X

OU8-MW-98* X X X X X X

OU8-MW-99* X X X X X

OU8 - Lower (WBU) Wells

MWANP4D X X X X X

MWANP12D X X X X X

Notes:

VOCs - Volatile Organic Compounds TOCs - Total Organic Carbon Common anions include Chloride (Cl) and Sulfate (SO4) Dissolved Gases include Methane, Ethane, and Ethene SVOCs - Semi-Volatile Organic Compounds PAHs - Polyaromatic Hydrocarbons PCBs - Polychlorinated Biphenyls *Monitoring well samples quarterly as part of fenceline monitoring 1EVO in well at time of sampling; sample collected as amount of EVO was negligible.

02118201.0001 2 of 2

Table 2-2 OU 8 Monitoring Well Construction Details Groundwater Elevation Data

2017 Annual OU 8 Groundwater Monitoring Report Defense Supply Center Richmond

Richmond, Virginia

Well_ID Aquifer Total Depth (ft)

Screen Interval (ft)

Well Diameter (in)

Groundwater Elevation

Measurement Date (Spring Event)

Depth to Water (ft) (Spring Event)

Groundwater Elevation

Measurement Date (Fall Event)

Depth to Water

(ft) (Fall Event)

DMW-23A Upper 22.6 12.50-22.50 4 3/28/2017 11.03 10/3/2017 12.65 DMW-24A Upper 23.57 13.80-23.80 4 3/28/2017 11.23 10/3/2017 12.92 DMW-30A Upper 21.45 12.00-22.00 4 3/28/2017 12.34 10/3/2017 13.98

DP-11 Upper 23 11.00-20.30 6 3/28/2017 12.51 10/3/2017 14 DP-12 Upper 23.6 12.00-21.30 6 3/28/2017 12.42 10/3/2017 13.98 DP-2 Upper 25 13.00-22.30 6 3/28/2017 12.81 10/4/2017 14.08 DP-6 Upper 27 15.00-24.30 6 3/28/2017 16.57 10/4/2017 17.58

MWANP-1 Upper 23 18.10-23.00 2 3/28/2017 15.54 10/4/2017 16.48 MWANP-3 Upper 23 18.10-23.00 2 3/28/2017 13.38 10/2/2017 14.62

MWANP-4D Lower 43 38.00-43.00 2 3/28/2017 27.88 10/5/2017 29.2 MWANP-11 Upper 24.8 15.00-25.00 2 3/28/2017 16.66 10/4/2017 17.75

MWANP-12D Lower 45.5 40.40-45.50 2 3/28/2017 30.46 10/5/2017 31.7 MWANP-13 Upper 25 15.00-25.00 2 3/28/2017 15.75 10/5/2017 16.9 MWANP-15 Upper 25 15.08-25.08 2 NS NS NS NS MWANP-16 Upper 24.8 15.00-25.00 2 3/28/2017 14.25 10/5/2017 15.8 MWANP-17 Upper 16.25 15.00-25.00 2 3/28/2017 14.45 10/3/2017 16 MWANP-18 Upper 24.85 15.00-25.00 2 3/28/2017 13.9 10/3/2017 15.31 MWANP-19 Upper 24.7 15.00-25.00 2 3/28/2017 14.18 10/4/2017 15.98 MWANP-20 Upper 25 15.00-25.00 2 3/28/2017 14.14 10/4/2017 15.9 MWANP-23 Upper 25 15.00-25.00 2 3/28/2017 11.12 10/5/2017 12.39 MWANP-24 Upper 24.5 14.50-24.50 2 3/28/2017 14.84 NS NS MWANP-25 Upper 24 17.00-27.00 2 3/28/2017 15.3 NS NS MWANP-26 Upper 28.15 18.00-28.00 2 3/28/2017 15.12 10/2/2017 16.62 MWANP-27 Upper 27.3 17.00-27.00 2 3/28/2017 14.05 10/2/2017 15.69 OS72-MW1 Upper 24.8 10.20-25.10 0.75 NS NS 10/3/2017 16

OU8-MW-100 Upper 25 20.00-25.00 0.75 3/28/2017 16.05 10/4/2017 17.7 OU8-MW-102 Upper 24.5 20.00-25.00 0.75 3/28/2017 11.24 10/2/2017 12.75 OU8-MW-103 Upper 25 21.00-26.00 0.75 3/28/2017 13.73 10/2/2017 15.3 OU8-MW-104 Upper 25 20.00-25.00 0.75 3/28/2017 12.52 NS NS OU8-MW-105 Upper 25 20.00-25.00 0.75 3/28/2017 16.35 10/4/2017 17.7 OU8-MW-106 Upper 24.85 20.00-25.00 0.75 3/28/2017 20.1 NS NS OU8-MW-108 Upper 17 20.00-25.00 0.75 3/28/2017 15.05 10/4/2017 16.22 OU8-MW-112 Upper 25.5 21.00-26.00 0.75 3/28/2017 13.79 10/4/2017 0 OU8-MW-113 Upper 24.95 20.00-25.00 0.75 3/28/2017 14.56 10/4/2017 15.71 OU8-MW-114 Upper 26 21.00-26.00 0.75 3/28/2017 14.01 10/4/2017 15.17 OU8-MW-115 Upper 22 17.00-22.00 0.75 3/28/2017 12.45 10/3/2017 13.79 OU8-MW-116 Upper 24.95 20.00-25.00 0.75 3/28/2017 14.23 NS NS OU8-MW-117 Upper 25 20.00-25.00 0.75 3/28/2017 14.39 10/3/2017 15.28 OU8-MW-118 Upper 25.12 20.00-25.00 0.75 3/28/2017 15.64 10/4/2017 16.9 OU8-MW-119 Upper 20 15.00-20.00 0.75 3/28/2017 12.43 10/3/2017 13.48 OU8-MW-120 Upper 20.1 15.00-20.00 0.75 3/28/2017 14.29 NS NS OU8-MW-121 Upper 25.17 20.00-25.00 0.75 3/28/2017 14.72 10/4/2017 16.4 OU8-MW-122 Upper 24.9 20.00-25.00 0.75 3/28/2017 14.32 10/4/2017 15.8 OU8-MW-123 Upper 24.2 19.00-24.00 0.75 3/28/2017 11.68 10/3/2017 13.2 OU8-MW-124 Upper 24.95 20.00-25.00 0.75 3/28/2017 13.86 10/3/2017 15.02 OU8-MW-125 Upper 25 14.00-24.00 6 3/28/2017 13.13 10/4/2017 14.36

Notes:

-- Well could not be gauged.

NS - Not Sampled. Refer to the Table 2-1 for the Sampling, Gauging and Analysis Matrix.

NA - Not available ft - feet in - inches

1. Only monitoring wells gauged and sampled as part of the annual 2017 sampling event are included on this Table.

2. Monitoring well construction data referenced from AECOM Draft Results of Annual Monitoring at Operable Unit 8 - March 2015, Defense Supply Center Richmond report dated October 2016.

02118201.0001 Page 1 of 2

Table 2-2 OU 8 Monitoring Well Construction Details Groundwater Elevation Data

2017 Annual OU 8 Groundwater Monitoring Report Defense Supply Center Richmond

Richmond, Virginia

Well_ID Aquifer Total Depth (ft)

Screen Interval (ft)

Well Diameter (in)

Groundwater Elevation

Measurement Date (Spring Event)

Depth to Water (ft) (Spring Event)

Groundwater Elevation

Measurement Date (Fall Event)

Depth to Water

(ft) (Fall Event)

OU8-MW-126 Upper 24.97 15.00-25.00 2 3/28/2017 13.03 10/4/2017 14.22 OU8-MW-127 Upper 24.66 14.66-24.66 6 3/28/2017 12.84 10/4/2017 14.05 OU8-MW-128 Upper 25.1 15.00-25.00 6 3/28/2017 12.33 10/5/2017 13.55 OU8-MW-130 Upper 26.54 16.00-26.00 6.25 3/28/2017 14.09 10/2/2017 15.39 OU8-MW-131 Upper 26.35 16.00-26.00 6.25 3/28/2017 13.11 10/2/2017 14.29 OU8-MW-132 Upper 23.15 14.00-24.00 6.25 3/28/2017 13.01 10/2/2017 14.15 OU8-MW-133 Upper 28.38 18.00-28.00 6.25 3/28/2017 15.01 10/3/2017 16.22 OU8-MW-134 Upper 29.28 20.00-30.00 6.25 3/28/2017 20.1 10/3/2017 21.31 OU8-MW-145 Upper 25.55 16.00-26.00 6 3/28/2017 13.84 10/4/2017 15 OU8-MW-146 Upper 23.6 13.00-23.00 6 3/28/2017 13.7 10/4/2017 15.6 OU8-MW-147 Upper 24 14.00-24.00 6 3/28/2017 12.5 10/3/2017 14.45 OU8-MW-148 Upper 27.92 18.00-28.00 6 3/28/2017 11.58 10/5/2017 12.79 OU8-MW-149 Upper 26.27 17.50-27.50 6 3/28/2017 12.82 10/4/2017 14.03 OU8-MW-156 Upper 30.5 20.00-30.00 6 3/28/2017 14.74 10/3/2017 17.85 OU8-MW-157 Upper 26.62 17.00-27.00 6 3/28/2017 13.29 10/3/2017 14.29 OU8-MW-158 Upper 30 17.00-27.00 6 3/28/2017 13.29 10/3/2017 14.72 OU8-MW-159 Upper 43.5 0.00-0.00 2 3/28/2017 22.81 10/5/2017 23.62 OU8-MW-160 Upper 39.7 0.00-0.00 2 3/28/2017 21.72 10/5/2017 22.93 OU8-MW-161 Upper 34.83 0.00-0.00 2 3/28/2017 20.27 10/5/2017 0 OU8-MW-50 Upper 16 11.00-16.00 0.75 3/28/2017 12.22 NS NS OU8-MW-67 Upper 20 15.00-20.00 0.75 3/28/2017 12.39 10/2/2017 14.11 OU8-MW-68 Upper 19.39 15.00-20.00 0.75 3/28/2017 12.25 10/2/2017 13.96 OU8-MW-72 Upper 20 15.00-20.00 0.75 3/28/2017 12.2 10/2/2017 13.95 OU8-MW-75 Upper 19.48 15.00-20.00 0.75 3/28/2017 11.62 10/3/2017 13.35 OU8-MW-88 Upper 22.25 11.00-21.00 0.75 3/28/2017 14.14 10/4/2017 15.8 OU8-MW-89 Upper 24 14.00-24.00 4 3/28/2017 14.11 10/5/2017 15.69 OU8-MW-90 Upper 25.11 15.00-25.00 4 3/28/2017 14.05 10/5/2017 15.5 OU8-MW-91 Upper 25.9 16.00-26.00 4 3/28/2017 14.11 10/5/2017 15.4 OU8-MW-92 Upper 24 14.00-24.00 4 3/28/2017 14.53 NS NS OU8-MW-93 Upper 24 14.00-24.00 4 3/28/2017 14.51 NS NS OU8-MW-94 Upper 24.97 20.00-25.00 2 3/28/2017 15.8 10/4/2017 17.5 OU8-MW-95 Upper 26 20.00-25.00 0.75 3/28/2017 16.18 10/4/2017 17.75 OU8-MW-96 Upper 29.45 20.00-25.00 0.75 3/28/2017 16.76 10/5/2017 18.18 OU8-MW-97 Upper 24.93 20.00-25.00 0.75 3/28/2017 13.1 10/5/2017 14.5 OU8-MW-98 Upper 29.7 20.00-30.00 0.75 3/28/2017 16.92 NS NS OU8-MW-99 Upper 24.65 20.00-25.00 0.75 3/28/2017 14.62 NS NS

Notes:

-- Well could not be gauged.

NS - Not Sampled. Refer to the Table 2-1 for the Sampling, Gauging and Analysis Matrix.

NA - Not available ft - feet in - inches

1. Only monitoring wells gauged and sampled as part of the annual 2017 sampling event are included on this Table.

2. Monitoring well construction data referenced from AECOM Draft Results of Annual Monitoring at Operable Unit 8 - March 2015, Defense Supply Center Richmond report dated October 2016.

02118201.0001 Page 2 of 2

Table 2-3 OU 8 Spring 2017 Upper Water Bearing Unit - VOCs 2017 Annual OU 8 Groundwater Monitoring Report

Defense Supply Center Richmond Richmond, Virginia

DMW-23A DMW-24A DMW-30A DP-11 DP-12 DP-2 DP-6 MWANP-1 MWANP-11 MWANP-13

4/4/2017 4/3/2017 4/4/2017 4/3/2017 4/4/2017 4/3/2017 4/3/2017 4/6/2017 4/6/2017 4/4/2017

Analyte CAS Units MCL 1,1,1,2-Tetrachloroethane 630-20-6 ug/l -- < 0.500 UJ < 0.500 UJ < 1.00 UJ < 2.50 U < 2.50 UJ < 0.500 UJ < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 UJ 1,1,1-Trichloroethane 71-55-6 ug/l 200 < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U 1,1,2,2-Tetrachloroethane 79-34-5 ug/l -- < 0.200 U < 0.200 U < 0.400 U < 1.00 U < 1.00 U < 0.200 U < 0.400 U < 1.00 U [< 1.00 U] < 1.00 U < 0.200 U 1,1,2-Trichloroethane 79-00-5 ug/l 5 < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U 1,1-Dichloroethane 75-34-3 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U 1,1-Dichloroethene 75-35-4 ug/l 7 < 0.500 U < 0.500 U 0.543 J < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U 1,1-Dichloropropene 563-58-6 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U 1,2,3-Trichlorobenzene 87-61-6 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 5.00 U [< 5.00 U] < 5.00 U < 0.500 U 1,2,3-Trichloropropane 96-18-4 ug/l -- < 1.00 U < 1.00 U < 2.00 U < 5.00 U < 5.00 U < 1.00 U < 2.00 U < 1.00 U [< 1.00 U] < 1.00 U < 1.00 U 1,2,4-Trichlorobenzene 120-82-1 ug/l 70 < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 5.00 U [< 5.00 U] < 5.00 U < 0.500 U 1,2,4-Trimethylbenzene 95-63-6 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U 1,2-Dibromo-3-chloropropane 96-12-8 ug/l 0.2 < 1.00 U < 1.00 U < 2.00 U < 5.00 U < 5.00 U < 1.00 U < 2.00 U < 5.00 U [< 5.00 U] < 5.00 U < 1.00 U 1,2-Dibromoethane 106-93-4 ug/l 0.05 < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U 1,2-Dichlorobenzene 95-50-1 ug/l 600 < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U 1,2-Dichloroethane 107-06-2 ug/l 5 < 0.500 U < 0.500 U 12.1 D 7.12 D < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U 1,2-Dichloropropane 78-87-5 ug/l 5 < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U 1,3,5-Trimethylbenzene 108-67-8 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U 1,3-Dichlorobenzene 541-73-1 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U 1,3-Dichloropropane 142-28-9 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U 1,4-Dichlorobenzene 106-46-7 ug/l 75 < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U 2,2-Dichloropropane 594-20-7 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 UJ < 2.50 U < 0.500 UJ < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U Notes:

VOC - Volatile Organic Compounds ug/L - micrograms per liter MCL - Maximum Concentration Limit U - Not detected J - Estimated D - Diluted Bold - Indicates concentration was detected (277 detections) Bold - Indicates concentration was detected above MCL (117 exceedances found) [2.62] - Brackets indicate duplicate sample concentration Only monitoring wells that were analyzed for VOCs are presented on this table.

Location ID Sample Date

02118201.0001 Page 1 of 24

2017 Annual OU 8 Groundwater Monitoring Report

Defense Supply Center Richmond Richmond, Virginia

DMW-23A DMW-24A DMW-30A DP-11 DP-12 DP-2 DP-6 MWANP-1 MWANP-11 MWANP-13

4/4/2017 4/3/2017 4/4/2017 4/3/2017 4/4/2017 4/3/2017 4/3/2017 4/6/2017 4/6/2017 4/4/2017

Analyte CAS Units MCL

Location ID Sample Date

2-Butanone (MEK) 78-93-3 ug/l -- < 5.00 U < 5.00 U < 10.0 U < 25.0 U < 25.0 U < 5.00 U < 10.0 U < 10.0 U [< 10.0 U] < 10.0 U < 5.00 U 2-Chlorotoluene 95-49-8 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U 4-Chlorotoluene 106-43-4 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U 4-Methyl-2-Pentanone 108-10-1 ug/l -- < 2.50 U < 2.50 UJ < 5.00 U < 12.5 U < 12.5 U < 2.50 U < 5.00 U < 10.0 U [< 10.0 U] < 10.0 U < 2.50 U Acetone 67-64-1 ug/l -- < 5.00 U 3.69 J 19.2 J < 25.0 U < 25.0 U < 5.00 U 5.93 J < 10.0 U [< 10.0 U] < 10.0 U < 5.00 U Benzene 71-43-2 ug/l 5 < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U Bromobenzene 108-86-1 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U Bromochloromethane 74-97-5 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U Bromodichloromethane 75-27-4 ug/l 80 < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U Bromoform 75-25-2 ug/l 80 < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 UJ [< 1.00 UJ] < 1.00 UJ < 0.500 U Bromomethane 74-83-9 ug/l -- < 1.00 U < 1.00 U < 2.00 U < 5.00 U < 5.00 U < 1.00 U < 2.00 U < 5.00 UJ [< 5.00 UJ] < 5.00 UJ < 1.00 U Carbon Disulfide 75-15-0 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 2.00 U [< 2.00 U] < 2.00 U < 0.500 U Carbon Tetrachloride 56-23-5 ug/l 5 < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U CFC-11 75-69-4 ug/l -- < 1.00 U < 1.00 U < 2.00 U < 5.00 U < 5.00 U < 1.00 U < 2.00 U < 1.00 U [< 1.00 U] < 1.00 U < 1.00 U CFC-12 75-71-8 ug/l -- < 1.00 U < 1.00 U < 2.00 U < 5.00 U < 5.00 U < 1.00 U < 2.00 U < 1.00 UJ [< 1.00 UJ] < 1.00 UJ < 1.00 U Chlorobenzene 108-90-7 ug/l 100 < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U Chlorodibromomethane 124-48-1 ug/l 80 < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U Chloroethane 75-00-3 ug/l -- < 1.00 U < 1.00 U < 2.00 U < 5.00 U < 5.00 U < 1.00 U < 2.00 U < 5.00 U [< 5.00 U] < 5.00 U < 1.00 U Chloroform 67-66-3 ug/l 80 < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U Chloromethane 74-87-3 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U cis-1,2-Dichloroethene 156-59-2 ug/l 70 < 0.500 U < 0.500 U 49.4 D 140 D 40.5 D 0.253 J 53.3 D < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U cis-1,3-Dichloropropene 10061-01-5 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U Cymene (p-Isopropyltoluene) 99-87-6 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U Dibromomethane 74-95-3 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U Dichloromethane 75-09-2 ug/l 5 < 1.00 U < 1.00 U 2.79 J < 5.00 U < 5.00 U < 1.00 U < 2.00 U < 5.00 U [< 5.00 U] < 5.00 U < 1.00 U Notes:

VOC - Volatile Organic Compounds ug/L - micrograms per liter MCL - Maximum Concentration Limit U - Not detected J - Estimated D - Diluted Bold - Indicates concentration was detected (277 detections) Bold - Indicates concentration was detected above MCL (117 exceedances found) [2.62] - Brackets indicate duplicate sample concentration Only monitoring wells that were analyzed for VOCs are presented on this table.

02118201.0001 Page 2 of 24

2017 Annual OU 8 Groundwater Monitoring Report

Defense Supply Center Richmond Richmond, Virginia

DMW-23A DMW-24A DMW-30A DP-11 DP-12 DP-2 DP-6 MWANP-1 MWANP-11 MWANP-13

4/4/2017 4/3/2017 4/4/2017 4/3/2017 4/4/2017 4/3/2017 4/3/2017 4/6/2017 4/6/2017 4/4/2017

Analyte CAS Units MCL

Location ID Sample Date

Ethylbenzene 100-41-4 ug/l 700 < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U Hexachloro-1,3-butadiene 87-68-3 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 5.00 U [< 5.00 U] < 5.00 U < 0.500 U Isopropylbenzene 98-82-8 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U m&p-Xylenes ARC-mpXyl ug/l -- < 1.00 U < 1.00 U < 2.00 U < 5.00 U < 5.00 U < 1.00 U < 2.00 U < 1.00 U [< 1.00 U] < 1.00 U < 1.00 U Methyl N-Butyl Ketone (2-Hexanone) 591-78-6 ug/l -- < 2.50 U < 2.50 U < 5.00 U < 12.5 U < 12.5 U < 2.50 U < 5.00 U < 10.0 U [< 10.0 U] < 10.0 U < 2.50 U Methyl-tert-butylether 1634-04-4 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 10.0 U [< 10.0 U] < 10.0 U < 0.500 U n-Butylbenzene 104-51-8 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U n-Propylbenzene 103-65-1 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U o-Xylene 95-47-6 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U sec-Butylbenzene 135-98-8 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U Styrene (Monomer) 100-42-5 ug/l 100 < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U tert-Butylbenzene 98-06-6 ug/l -- < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U Tetrachloroethene 127-18-4 ug/l 5 1.28 18.8 125 D 65.3 D 257 D 0.263 J 30.6 D 1.42 [1.37] < 1.00 U < 0.500 U Toluene 108-88-3 ug/l 1000 < 0.500 U < 0.500 U < 1.00 U < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U Total Xylenes 1330-20-7 ug/l 10000 -- -- -- -- -- -- -- < 2.00 U [< 2.00 U] < 2.00 U --trans-1,2-Dichloroethene 156-60-5 ug/l 100 < 0.500 U < 0.500 U 1.84 J < 2.50 U < 2.50 U < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U trans-1,3-Dichloropropene 10061-02-6 ug/l -- < 0.500 UJ < 0.500 UJ < 1.00 UJ < 2.50 UJ < 2.50 UJ < 0.500 UJ < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 UJ Trichloroethene 79-01-6 ug/l 5 < 0.500 U 1.21 73.2 D 48.1 D 45.1 D 0.343 J 15.4 D < 1.00 U [0.690 J] 1.45 < 0.500 U Vinyl chloride 75-01-4 ug/l 2 < 0.500 U < 0.500 U 13.9 D 4.79 J 4.14 J < 0.500 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 0.500 U Notes:

VOC - Volatile Organic Compounds ug/L - micrograms per liter MCL - Maximum Concentration Limit U - Not detected J - Estimated D - Diluted Bold - Indicates concentration was detected (277 detections) Bold - Indicates concentration was detected above MCL (117 exceedances found) [2.62] - Brackets indicate duplicate sample concentration Only monitoring wells that were analyzed for VOCs are presented on this table.

02118201.0001 Page 3 of 24

2017 Annual OU 8 Groundwater Monitoring Report

Defense Supply Center Richmond Richmond, Virginia

Analyte CAS Units MCL 1,1,1,2-Tetrachloroethane 630-20-6 ug/l -- 1,1,1-Trichloroethane 71-55-6 ug/l 200 1,1,2,2-Tetrachloroethane 79-34-5 ug/l -- 1,1,2-Trichloroethane 79-00-5 ug/l 5 1,1-Dichloroethane 75-34-3 ug/l -- 1,1-Dichloroethene 75-35-4 ug/l 7 1,1-Dichloropropene 563-58-6 ug/l -- 1,2,3-Trichlorobenzene 87-61-6 ug/l -- 1,2,3-Trichloropropane 96-18-4 ug/l -- 1,2,4-Trichlorobenzene 120-82-1 ug/l 70 1,2,4-Trimethylbenzene 95-63-6 ug/l -- 1,2-Dibromo-3-chloropropane 96-12-8 ug/l 0.2 1,2-Dibromoethane 106-93-4 ug/l 0.05 1,2-Dichlorobenzene 95-50-1 ug/l 600 1,2-Dichloroethane 107-06-2 ug/l 5 1,2-Dichloropropane 78-87-5 ug/l 5 1,3,5-Trimethylbenzene 108-67-8 ug/l -- 1,3-Dichlorobenzene 541-73-1 ug/l -- 1,3-Dichloropropane 142-28-9 ug/l -- 1,4-Dichlorobenzene 106-46-7 ug/l 75 2,2-Dichloropropane 594-20-7 ug/l -- Notes:

VOC - Volatile Organic Compounds ug/L - micrograms per liter MCL - Maximum Concentration Limit U - Not detected J - Estimated D - Diluted Bold - Indicates concentration was detected (277 detections) Bold - Indicates concentration was detected above MCL (117 exceedances found) [2.62] - Brackets indicate duplicate sample concentration Only monitoring wells that were analyzed for VOCs are presented on this table.

Location ID Sample Date

MWANP-16 MWANP-17 MWANP-18 MWANP-19 MWANP-20 MWANP-23 MWANP-24 MWANP-25 MWANP-26 MWANP-27 MWANP-3 4/5/2017 4/5/2017 4/5/2017 4/4/2017 4/4/2017 4/3/2017 4/4/2017 4/6/2017 4/5/2017 4/6/2017 4/5/2017

< 1.00 U < 1.00 U < 1.00 U < 1.00 UJ < 0.500 UJ < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.400 U < 1.00 U < 0.400 U < 0.200 U < 0.200 U < 0.200 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 5.00 U < 1.00 U < 5.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 5.00 U < 5.00 U < 5.00 U < 5.00 U < 1.00 U < 2.00 U < 1.00 U < 2.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 5.00 U < 1.00 U < 5.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 5.00 U < 5.00 U < 5.00 U < 5.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 5.00 U < 2.00 U < 5.00 U < 2.00 U < 1.00 U < 1.00 U < 1.00 U < 5.00 U < 5.00 U < 5.00 U < 5.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 UJ < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 UJ < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 UJ < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 UJ < 1.00 U < 1.00 U < 1.00 U < 1.00 U

02118201.0001 Page 4 of 24

2017 Annual OU 8 Groundwater Monitoring Report

Defense Supply Center Richmond Richmond, Virginia

Analyte CAS Units MCL

Location ID Sample Date

2-Butanone (MEK) 78-93-3 ug/l -- 2-Chlorotoluene 95-49-8 ug/l -- 4-Chlorotoluene 106-43-4 ug/l -- 4-Methyl-2-Pentanone 108-10-1 ug/l -- Acetone 67-64-1 ug/l -- Benzene 71-43-2 ug/l 5 Bromobenzene 108-86-1 ug/l -- Bromochloromethane 74-97-5 ug/l -- Bromodichloromethane 75-27-4 ug/l 80 Bromoform 75-25-2 ug/l 80 Bromomethane 74-83-9 ug/l -- Carbon Disulfide 75-15-0 ug/l -- Carbon Tetrachloride 56-23-5 ug/l 5 CFC-11 75-69-4 ug/l -- CFC-12 75-71-8 ug/l -- Chlorobenzene 108-90-7 ug/l 100 Chlorodibromomethane 124-48-1 ug/l 80 Chloroethane 75-00-3 ug/l -- Chloroform 67-66-3 ug/l 80 Chloromethane 74-87-3 ug/l --cis-1,2-Dichloroethene 156-59-2 ug/l 70 cis-1,3-Dichloropropene 10061-01-5 ug/l -- Cymene (p-Isopropyltoluene) 99-87-6 ug/l -- Dibromomethane 74-95-3 ug/l -- Dichloromethane 75-09-2 ug/l 5 Notes:

VOC - Volatile Organic Compounds ug/L - micrograms per liter MCL - Maximum Concentration Limit U - Not detected J - Estimated D - Diluted Bold - Indicates concentration was detected (277 detections) Bold - Indicates concentration was detected above MCL (117 exceedances found) [2.62] - Brackets indicate duplicate sample concentration Only monitoring wells that were analyzed for VOCs are presented on this table.

MWANP-16 MWANP-17 MWANP-18 MWANP-19 MWANP-20 MWANP-23 MWANP-24 MWANP-25 MWANP-26 MWANP-27 MWANP-3 4/5/2017 4/5/2017 4/5/2017 4/4/2017 4/4/2017 4/3/2017 4/4/2017 4/6/2017 4/5/2017 4/6/2017 4/5/2017

< 10.0 U < 10.0 U < 10.0 U < 10.0 U < 5.00 U < 5.00 U < 5.00 U < 10.0 U < 10.0 U < 10.0 U < 10.0 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 10.0 U < 5.00 UJ < 10.0 U < 5.00 UJ < 2.50 UJ < 2.50 U < 2.50 UJ < 10.0 U < 10.0 U < 10.0 U < 10.0 U < 10.0 U 18.6 J < 10.0 U 91.9 D < 5.00 U 4.05 J < 5.00 U < 10.0 U < 10.0 U < 10.0 U < 10.0 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 UJ < 1.00 U < 1.00 UJ < 1.00 U < 5.00 U < 2.00 UJ < 5.00 U < 2.00 U < 1.00 U < 1.00 UJ < 1.00 UJ < 5.00 UJ < 5.00 U < 5.00 UJ < 5.00 U < 2.00 U < 1.00 U < 2.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 2.00 U 0.538 J < 2.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U 0.448 J < 1.00 U < 1.00 UJ < 2.00 U < 1.00 UJ < 2.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 UJ < 1.00 UJ < 1.00 UJ < 1.00 UJ < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 5.00 U < 2.00 UJ < 5.00 U < 2.00 U < 1.00 U < 1.00 UJ < 1.00 UJ < 5.00 U < 5.00 U < 5.00 U < 5.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 UJ < 1.00 U < 1.00 U < 0.500 U < 0.500 UJ < 0.500 UJ < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U 150 D < 1.00 U < 1.00 U 1.57 < 0.500 U < 0.500 U < 1.00 U 0.970 J < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 5.00 U < 2.00 U < 5.00 U < 2.00 U < 1.00 U < 1.00 U < 1.00 U < 5.00 U < 5.00 U < 5.00 U < 5.00 U

02118201.0001 Page 5 of 24

2017 Annual OU 8 Groundwater Monitoring Report

Defense Supply Center Richmond Richmond, Virginia

Analyte CAS Units MCL

Location ID Sample Date

Ethylbenzene 100-41-4 ug/l 700 Hexachloro-1,3-butadiene 87-68-3 ug/l -- Isopropylbenzene 98-82-8 ug/l --m&p-Xylenes ARC-mpXyl ug/l -- Methyl N-Butyl Ketone (2-Hexanone) 591-78-6 ug/l -- Methyl-tert-butylether 1634-04-4 ug/l --n-Butylbenzene 104-51-8 ug/l --n-Propylbenzene 103-65-1 ug/l --o-Xylene 95-47-6 ug/l --sec-Butylbenzene 135-98-8 ug/l -- Styrene (Monomer) 100-42-5 ug/l 100 tert-Butylbenzene 98-06-6 ug/l -- Tetrachloroethene 127-18-4 ug/l 5 Toluene 108-88-3 ug/l 1000 Total Xylenes 1330-20-7 ug/l 10000 trans-1,2-Dichloroethene 156-60-5 ug/l 100 trans-1,3-Dichloropropene 10061-02-6 ug/l -- Trichloroethene 79-01-6 ug/l 5 Vinyl chloride 75-01-4 ug/l 2 Notes:

VOC - Volatile Organic Compounds ug/L - micrograms per liter MCL - Maximum Concentration Limit U - Not detected J - Estimated D - Diluted Bold - Indicates concentration was detected (277 detections) Bold - Indicates concentration was detected above MCL (117 exceedances found) [2.62] - Brackets indicate duplicate sample concentration Only monitoring wells that were analyzed for VOCs are presented on this table.

MWANP-16 MWANP-17 MWANP-18 MWANP-19 MWANP-20 MWANP-23 MWANP-24 MWANP-25 MWANP-26 MWANP-27 MWANP-3 4/5/2017 4/5/2017 4/5/2017 4/4/2017 4/4/2017 4/3/2017 4/4/2017 4/6/2017 4/5/2017 4/6/2017 4/5/2017

< 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 5.00 U < 1.00 U < 5.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 5.00 U < 5.00 U < 5.00 U < 5.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 2.00 U < 1.00 U < 2.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 10.0 U 2.91 J < 10.0 U < 5.00 U < 2.50 U < 2.50 U < 2.50 U < 10.0 U < 10.0 U < 10.0 U < 10.0 U < 10.0 U < 1.00 UJ < 10.0 U < 1.00 U < 0.500 U < 0.500 U < 0.500 UJ < 10.0 U < 10.0 U < 10.0 U < 10.0 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U 0.511 J < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U 5.35 < 1.00 U 4.14 < 0.500 U 0.409 J 4.12 5.51 3.92 1.41 < 1.00 U 0.683 J < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 2.00 U -- < 2.00 U -- -- -- -- < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 1.00 U 0.731 J < 1.00 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 UJ < 0.500 UJ < 0.500 U < 0.500 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U

1.19 < 1.00 U 8.45 < 1.00 U 9.52 < 0.500 U 0.404 J 8.59 12.3 5.35 1.61 < 1.00 U 4.68 J < 1.00 U < 1.00 U < 0.500 U < 0.500 UJ < 0.500 UJ < 1.00 U < 1.00 U < 1.00 U < 1.00 U

02118201.0001 Page 6 of 24

2017 Annual OU 8 Groundwater Monitoring Report

Defense Supply Center Richmond Richmond, Virginia

Analyte CAS Units MCL 1,1,1,2-Tetrachloroethane 630-20-6 ug/l -- 1,1,1-Trichloroethane 71-55-6 ug/l 200 1,1,2,2-Tetrachloroethane 79-34-5 ug/l -- 1,1,2-Trichloroethane 79-00-5 ug/l 5 1,1-Dichloroethane 75-34-3 ug/l -- 1,1-Dichloroethene 75-35-4 ug/l 7 1,1-Dichloropropene 563-58-6 ug/l -- 1,2,3-Trichlorobenzene 87-61-6 ug/l -- 1,2,3-Trichloropropane 96-18-4 ug/l -- 1,2,4-Trichlorobenzene 120-82-1 ug/l 70 1,2,4-Trimethylbenzene 95-63-6 ug/l -- 1,2-Dibromo-3-chloropropane 96-12-8 ug/l 0.2 1,2-Dibromoethane 106-93-4 ug/l 0.05 1,2-Dichlorobenzene 95-50-1 ug/l 600 1,2-Dichloroethane 107-06-2 ug/l 5 1,2-Dichloropropane 78-87-5 ug/l 5 1,3,5-Trimethylbenzene 108-67-8 ug/l -- 1,3-Dichlorobenzene 541-73-1 ug/l -- 1,3-Dichloropropane 142-28-9 ug/l -- 1,4-Dichlorobenzene 106-46-7 ug/l 75 2,2-Dichloropropane 594-20-7 ug/l -- Notes:

VOC - Volatile Organic Compounds ug/L - micrograms per liter MCL - Maximum Concentration Limit U - Not detected J - Estimated D - Diluted Bold - Indicates concentration was detected (277 detections) Bold - Indicates concentration was detected above MCL (117 exceedances found) [2.62] - Brackets indicate duplicate sample concentration Only monitoring wells that were analyzed for VOCs are presented on this table.

Location ID Sample Date

OS72-MW1 OU8-MW-100 OU8-MW-102 OU8-MW-103 OU8-MW-104 OU8-MW-105 OU8-MW-106 OU8-MW-108 OU8-MW-112 OU8-MW-113 4/5/2017 4/5/2017 4/5/2017 4/5/2017 4/3/2017 4/4/2017 4/5/2017 4/4/2017 4/5/2017 4/6/2017

< 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 UJ < 0.500 U < 0.500 U < 0.500 U [< 0.500 UJ] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 UJ [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.400 U < 0.200 U < 0.400 U < 0.200 U < 0.200 U < 0.200 U [< 0.200 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 5.00 U < 5.00 U < 5.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 5.00 U < 1.00 U < 1.00 U < 1.00 U < 2.00 U < 1.00 U < 2.00 U < 1.00 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 5.00 U < 5.00 U < 5.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 5.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 5.00 U < 5.00 U < 5.00 U < 2.00 U < 1.00 U < 2.00 U < 1.00 U < 1.00 U < 1.00 U [< 1.00 U] < 5.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 UJ 1.61 J < 0.500 UJ [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 UJ < 0.500 UJ < 0.500 UJ [< 0.500 U] < 1.00 U

02118201.0001 Page 7 of 24

2017 Annual OU 8 Groundwater Monitoring Report

Defense Supply Center Richmond Richmond, Virginia

Analyte CAS Units MCL

Location ID Sample Date

2-Butanone (MEK) 78-93-3 ug/l -- 2-Chlorotoluene 95-49-8 ug/l -- 4-Chlorotoluene 106-43-4 ug/l -- 4-Methyl-2-Pentanone 108-10-1 ug/l -- Acetone 67-64-1 ug/l -- Benzene 71-43-2 ug/l 5 Bromobenzene 108-86-1 ug/l -- Bromochloromethane 74-97-5 ug/l -- Bromodichloromethane 75-27-4 ug/l 80 Bromoform 75-25-2 ug/l 80 Bromomethane 74-83-9 ug/l -- Carbon Disulfide 75-15-0 ug/l -- Carbon Tetrachloride 56-23-5 ug/l 5 CFC-11 75-69-4 ug/l -- CFC-12 75-71-8 ug/l -- Chlorobenzene 108-90-7 ug/l 100 Chlorodibromomethane 124-48-1 ug/l 80 Chloroethane 75-00-3 ug/l -- Chloroform 67-66-3 ug/l 80 Chloromethane 74-87-3 ug/l --cis-1,2-Dichloroethene 156-59-2 ug/l 70 cis-1,3-Dichloropropene 10061-01-5 ug/l -- Cymene (p-Isopropyltoluene) 99-87-6 ug/l -- Dibromomethane 74-95-3 ug/l -- Dichloromethane 75-09-2 ug/l 5 Notes:

VOC - Volatile Organic Compounds ug/L - micrograms per liter MCL - Maximum Concentration Limit U - Not detected J - Estimated D - Diluted Bold - Indicates concentration was detected (277 detections) Bold - Indicates concentration was detected above MCL (117 exceedances found) [2.62] - Brackets indicate duplicate sample concentration Only monitoring wells that were analyzed for VOCs are presented on this table.

OS72-MW1 OU8-MW-100 OU8-MW-102 OU8-MW-103 OU8-MW-104 OU8-MW-105 OU8-MW-106 OU8-MW-108 OU8-MW-112 OU8-MW-113 4/5/2017 4/5/2017 4/5/2017 4/5/2017 4/3/2017 4/4/2017 4/5/2017 4/4/2017 4/5/2017 4/6/2017

< 10.0 U < 10.0 U < 10.0 U < 10.0 U < 5.00 U < 10.0 U < 5.00 U < 5.00 U < 5.00 U [< 5.00 U] < 10.0 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 10.0 U < 10.0 U < 10.0 U < 5.00 U < 2.50 U < 5.00 UJ < 2.50 UJ < 2.50 UJ < 2.50 UJ [< 2.50 UJ] < 10.0 U < 10.0 U < 10.0 U < 10.0 U 12.9 J 4.00 J < 10.0 U < 5.00 U < 5.00 U < 5.00 U [4.26 J] < 10.0 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 UJ [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 UJ < 5.00 U < 5.00 U < 5.00 U < 2.00 U < 1.00 U < 2.00 U < 1.00 UJ < 1.00 UJ < 1.00 UJ [< 1.00 U] < 5.00 UJ < 2.00 U < 2.00 U < 2.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 2.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 UJ [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U 2.87 < 2.00 U < 1.00 U < 2.00 U < 1.00 U < 1.00 U < 1.00 UJ [< 1.00 U] < 1.00 U < 1.00 UJ < 1.00 UJ < 1.00 UJ < 2.00 U < 1.00 U < 2.00 U < 1.00 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 UJ < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 5.00 U < 5.00 U < 5.00 U < 2.00 U < 1.00 U < 2.00 U < 1.00 UJ < 1.00 UJ < 1.00 UJ [< 1.00 U] < 5.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 UJ < 0.500 UJ < 0.500 UJ [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U 13.0 D < 0.500 U 96.2 D 0.601 J 23.5 0.302 J [< 0.500 U] 52.6 < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 UJ [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 5.00 U < 5.00 U < 5.00 U < 2.00 U < 1.00 U < 2.00 U < 1.00 U < 1.00 U < 1.00 U [< 1.00 U] < 5.00 U

02118201.0001 Page 8 of 24

2017 Annual OU 8 Groundwater Monitoring Report

Defense Supply Center Richmond Richmond, Virginia

Analyte CAS Units MCL

Location ID Sample Date

Ethylbenzene 100-41-4 ug/l 700 Hexachloro-1,3-butadiene 87-68-3 ug/l -- Isopropylbenzene 98-82-8 ug/l --m&p-Xylenes ARC-mpXyl ug/l -- Methyl N-Butyl Ketone (2-Hexanone) 591-78-6 ug/l -- Methyl-tert-butylether 1634-04-4 ug/l --n-Butylbenzene 104-51-8 ug/l --n-Propylbenzene 103-65-1 ug/l --o-Xylene 95-47-6 ug/l --sec-Butylbenzene 135-98-8 ug/l -- Styrene (Monomer) 100-42-5 ug/l 100 tert-Butylbenzene 98-06-6 ug/l -- Tetrachloroethene 127-18-4 ug/l 5 Toluene 108-88-3 ug/l 1000 Total Xylenes 1330-20-7 ug/l 10000 trans-1,2-Dichloroethene 156-60-5 ug/l 100 trans-1,3-Dichloropropene 10061-02-6 ug/l -- Trichloroethene 79-01-6 ug/l 5 Vinyl chloride 75-01-4 ug/l 2 Notes:

VOC - Volatile Organic Compounds ug/L - micrograms per liter MCL - Maximum Concentration Limit U - Not detected J - Estimated D - Diluted Bold - Indicates concentration was detected (277 detections) Bold - Indicates concentration was detected above MCL (117 exceedances found) [2.62] - Brackets indicate duplicate sample concentration Only monitoring wells that were analyzed for VOCs are presented on this table.

OS72-MW1 OU8-MW-100 OU8-MW-102 OU8-MW-103 OU8-MW-104 OU8-MW-105 OU8-MW-106 OU8-MW-108 OU8-MW-112 OU8-MW-113 4/5/2017 4/5/2017 4/5/2017 4/5/2017 4/3/2017 4/4/2017 4/5/2017 4/4/2017 4/5/2017 4/6/2017

< 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 5.00 U < 5.00 U < 5.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 5.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 2.00 U < 1.00 U < 2.00 U < 1.00 U < 1.00 U < 1.00 U [< 1.00 U] < 1.00 U < 10.0 U < 10.0 U < 10.0 U < 5.00 U < 2.50 U < 5.00 U < 2.50 U < 2.50 U < 2.50 U [< 2.50 U] < 10.0 U < 10.0 U < 10.0 U < 10.0 U < 1.00 U < 0.500 U < 1.00 U < 0.500 UJ 2.71 J < 0.500 UJ [< 0.500 U] < 10.0 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U

0.424 J < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U

5.08 1.42 32.4 1.49 J 8.57 28.9 D 0.976 J 27 3.77 [3.93] 9.16 < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 2.00 U < 2.00 U < 2.00 U -- -- -- -- -- -- < 2.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 0.500 U < 1.00 U < 0.500 U < 0.500 U < 0.500 U [< 0.500 U] < 1.00 U < 1.00 U < 1.00 U < 1.00 U < 1.00 UJ < 0.500 U < 1.00 UJ < 0.500 U < 0.500 U < 0.500 U [< 0.500 UJ] < 1.00 U

9.47 3.24 78.5 1.37 J 10.1 15.3 D 0.583 J 12.7 7.74 [6.71] 7.04 < 1.00 U < 1.00 U < 1.00 U < 1.00 UJ < 0.500 U 1.18 J < 0.500 UJ < 0.500 UJ < 0.500 UJ [< 0.500 U] < 1.00 U

02118201.0001 Page 9 of 24

2017 Annual OU 8 Groundwater Monitoring Report

Defense Supply Center Richmond Richmond, Virginia

Analyte CAS Units MCL 1,1,1,2-Tetrachloroethane 630-20-6 ug/l -- 1,1,1-Trichloroethane 71-55-6 ug/l 200 1,1,2,2-Tetrachloroethane 79-34-5 ug/l -- 1,1,2-Trichloroethane 79-00-5 ug/l 5 1,1-Dichloroethane 75-34-3 ug/l -- 1,1-Dichloroethene 75-35-4 ug/l 7 1,1-Dichloropropene 563-58-6 ug/l -- 1,2,3-Trichlorobenzene 87-61-6 ug/l -- 1,2,3-Trichloropropane 96-18-4 ug/l -- 1,2,4-Trichlorobenzene 120-82-1 ug/l 70 1,2,4-Trimethylbenzene 95-63-6 ug/l -- 1,2-Dibromo-3-chloropropane 96-12-8 ug/l 0.2 1,2-Dibromoethane 106-93-4 ug/l 0.05 1,2-Dichlorobenzene 95-50-1 ug/l 600 1,2-Dichloroethane 107-06-2 ug/l 5 1,2-Dichloropropane 78-87-5 ug/l 5 1,3,5-Trimethylbenzene 108-67-8 ug/l -- 1,3-Dichlorobenzene 541-73-1 ug/l -- 1,3-Dichloropropane 142-28-9 ug/l -- 1,4-Dichlorobenzene 106-46-7 ug/l 75 2,2-Dichloropropane 594-20-7 ug/l -- Notes:

VOC - Volatile Organic Compounds ug/L - micrograms per liter MCL - Maximum Concentration Limit U - Not detected J - Estimated D - Diluted Bold - Indicates concentration was detected (277 detections) Bold - Indicates concentration was detected above MCL (117 exceedances found) [2.62] - Brackets indicate duplicate sample concentration Only monitoring wells that were analyzed for VOCs are presented on this table.

Location ID Sample Date

OU8-MW-114 OU8-MW-115 OU8-MW-116 OU8-MW-117 OU8-MW-118 OU8-MW-119 OU8-MW-120 OU8-MW-121 OU8-MW-122 4/5/2017 4/3/2017 4/3/2017 4/3/2017 4/4/2017 4/6/2017 4/4/2017 4/4/2017 4/4/2017

< 0.500 U < 2.50 U < 5.00 U < 5.00 U [< 5.00 U] < 1.00 UJ < 1.00 U < 5.00 U [< 5.00 U] < 1.00 U [< 1.00 U] < 0.500 U < 0.500 UJ < 2.50 U < 5.00 U < 5.00 U [< 5.00 U] < 1.00 U < 1.00 U < 5.00 U [< 5.00 U] < 1.00 U [< 1.00 U] < 0.500 U < 0.200 U < 1.00 U < 2.00 U < 2.00 U [< 2.00 U] < 0.400 U < 1.00 U < 2.00 U [< 2.00 U] < 0.400 U [< 0.400 U] < 0.200 U < 0.500 U < 2.50 U < 5.00 U < 5.00 U [< 5.00 U] < 1.00 U < 1.00 U < 5.00 U [< 5.00 U] < 1.00 U [< 1.00 U] < 0.500 U < 0.500 U < 2.50 U < 5.00 U < 5.00 U [< 5.00 U] < 1.00 U < 1.00 U < 5.00 U [< 5.00 U] < 1.00 U [< 1.00 U] < 0.500 U

0.416 J < 2.50 U < 5.00 U < 5.00 U [< 5.00 U] 0.789 J < 1.00 U < 5.00 U [< 5.00 U] < 1.00 U [< 1.00 U] < 0.500 U

< 0.500 U < 2.50 U < 5.00 U < 5.00 U [< 5.00 U] < 1.00 U < 1.00 U < 5.00 U [< 5.00 U] < 1.00 U [< 1.00 U] < 0.500 U < 0.500 U < 2.50 U < 5.00 U < 5.00 U [< 5.00 U] < 1.00 U < 5.00 U < 5.00 U [< 5.00 U] < 1.00 U [< 1.00 U] < 0.500 U < 1.00 U < 5.00 U < 10.0 U < 10.0 U [< 10.0 U] < 2.00 U < 1.00 U < 10.0 U [< 10.0 U] < 2.00 U [< 2.00 U] < 1.00 U

< 0.500 U < 2.50 U < 5.00 U < 5.00 U [< 5.00 U] < 1.00 U < 5.00 U < 5.00 U [< 5.00 U] < 1.00 U [< 1.00 U] < 0.500 U < 0.500 U < 2.50 U < 5.00 U < 5.00 U [< 5.00 U] < 1.00 U < 1.00 U < 5.00 U [< 5.00 U] < 1.00 U [< 1.00 U] < 0.500 U < 1.00 U < 5.00 U < 10.0 U < 10.0 U [< 10.0 U] < 2.00 U < 5.00 U < 10.0 U [< 10.0 U] < 2.00 U [< 2.00 U] < 1.00 U

< 0.500 U < 2.50 U < 5.00 U < 5.00 U [< 5.00 U] < 1.00 U < 1.00 U < 5.00 U [< 5.00 U] < 1.00 U [< 1.00 U] < 0.500 U < 0.500 U < 2.50 U < 5.00 U < 5.00 U [< 5.00 U] < 1.00 U < 1.00 U < 5.00 U [< 5.00 U] < 1.00 U [< 1.00 U] < 0.500 U

0.598 J 19.2 D 9.52 J 12.8 D [11.7 D] 5.44 D < 1.00 U < 5.00 U [< 5.00 U] < 1.00 UJ [< 1.00 UJ] < 0.500 UJ

< 0.500 U < 2.50 U < 5.00 U < 5.00 U [< 5.00 U] < 1.00 U < 1.00 U < 5.00 U [< 5.00 U] < 1.00 U [< 1.00 U] < 0.500 U < 0.500 U < 2.50 U < 5.00 U < 5.00 U [< 5.00 U] < 1.00 U < 1.00 U < 5.00 U [< 5.00 U] < 1.00 U [< 1.00 U] < 0.500 U < 0.500 U < 2.50 U < 5.00 U < 5.00 U [< 5.00 U] < 1.00 U < 1.00 U < 5.00 U [< 5.00 U] < 1.00 U [< 1.00 U] < 0.500 U < 0.500 U < 2.50 U < 5.00 U < 5.00 U [< 5.00 U] < 1.00 U < 1.00 U < 5.00 U [< 5.00 U] < 1.00 U [< 1.00 U] < 0.500 U < 0.500 U < 2.50 U < 5.00 U < 5.00 U [< 5.00 U] < 1.00 U < 1.00 U < 5.00 U [< 5.00 U] < 1.00 U [< 1.00 U] < 0.500 U < 0.500 UJ < 2.50 U < 5.00 U < 5.00 U [< 5.00 U] < 1.00 U < 1.00 U < 5.00 U [< 5.00 U] < 1.00 UJ [< 1.00 UJ] < 0.500 UJ

02118201.0001 Page 10 of 24

2017 Annual OU 8 Groundwater Monitoring Report

Defense Supply Center Richmond Richmond, Virginia

Analyte CAS Units MCL

Location ID Sample Date

2-Butanone (MEK) 78-93-3 ug/l -- 2-Chlorotoluene 95-49-8 ug/l -- 4-Chlorotoluene 106-43-4 ug/l -- 4-Methyl-2-Pentanone 108-10-1 ug/l -- Acetone 67-64-1 ug/l -- Benzene 71-43-2 ug/l 5 Bromobenzene 108-86-1 ug/l -- Bromochloromethane 74-97-5 ug/l -- Bromodichloromethane 75-27-4 ug/l 80 Bromoform 75-25-2 ug/l 80 Bromomethane 74-83-9 ug/l -- Carbon Disulfide 75-15-0 ug/l -- Carbon Tetrachloride 56-23-5 ug/l 5 CFC-11 75-69-4 ug/l -- CFC-12 75-71-8 ug/l -- Chlorobenzene 108-90-7 ug/l 100 Chlorodibromomethane 124-48-1 ug/l 80 Chloroethane 75-00-3 ug/l -- Chloroform 67-66-3 ug/l 80 Chloromethane 74-87-3 ug/l --cis-1,2-Dichloroethene 156-59-2 ug/l 70 cis-1,3-Dichloropropene 10061-01-5 ug/l -- Cymene (p-Isopropyltoluene) 99-87-6 ug/l -- Dibromomethane 74-95-3 ug/l -- Dichloromethane 75-09-2 ug/l 5 Notes:

VOC - Volatile Organic Compounds ug/L - micrograms per liter MCL - Maximum Concentration Limit U - Not detected J - Estimated D - Diluted Bold - Indicates concentration was detected (277 detections) Bold - Indicates concentration was detected above MCL (117 exceedances found) [2.62] - Brackets indicate duplicate sample concentration Only monitoring wells that were analyzed for VOCs are presented on this table.

OU8-MW-114 OU8-MW-115 OU8-MW-116 OU8-MW-117 OU8-MW-118 OU8-MW-119 OU8-MW-120 OU8-MW-121 OU8-MW-122 4/5/2017 4/3/2017 4/3/2017 4/3/2017 4/4/2017 4/6/2017 4/4/2017 4/4/2017 4/4/2017

< 5.00 U < 25.0 U < 50.0 U < 50.0 U [< 50.0 U] < 10.0 U < 10.0 U < 50.0 U [< 50.0 U] < 10.0 U [5.20 J] < 5.00 U < 0.500 U < 2.50 U < 5.00 U < 5.00 U [< 5.00 U] < 1.00 U < 1.00 U < 5.00 U [< 5.00 U] < 1.00 U [< 1.00 U] < 0.500 U < 0.500 U < 2.50 U < 5.00 U < 5.00 U [< 5.00 U] < 1.00 U < 1.00 U < 5.00 U [< 5.00 U] < 1.00 U [< 1.00 U] < 0.500 U < 2.50 UJ < 12.5 U < 25.0 U < 25.0 U [< 25.0 U] < 5.00 UJ…

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