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Table 4 Groundwater Analytical Data - Total Petroleum Hydrocarbons and BTEX South Shore Parcels - Parcel 2A and Adjacent Areas West Weber Avenue and North Lincoln Street Stockton, California Depth Ethyl- Sample (feet, Date TPHg TPHd TPHk TPHo Benzene Toluene benzene Xylenes ID bgs) Sampled (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) A Zone Wells - Area 2A/2B and Adjacent Areas (cont.) MW-18 --- 4/15/03 4.2 5.30 ---0.099 4 0.007 0.0018 0.0013 0.0089 --- 5/7/03 4.8 5.80 ---0.28 4 0.0041 0.0019 0.0017 0.009 --- 8/20/03 5.4 3.70 ---0.18 4 0.0045 0.0017 0.0017 0.0092 --- 11/12/03 4.9 4.10 ---0.20 4 0.005 0.002 0.0023 0.0095 --- 2/19/04 4.9 3.00 ---0.15 4 0.0042 0.0017 0.0016 0.0071 --- 6/2/04 5.0 3.00 ---0.14 16 0.0043 0.0015 0.0013 0.0067 --- 9/9/04 5.3 2.20 ---0.10 16 0.0047 <0.002 <0.001 0.0062 ---12/10/04 22 4.5 2.50 ---0.12 4 0.0084 0.0019 0.0022 0.0076 --- 2/25/05 4.3 1.40 --- <0.05 0.0053 0.0016 0.0015 0.0065 --- 5/27/05 4.7 1.20 --- <0.05 0.0041 0.0013 0.0014 0.0058 --- 8/24/05 4.8 1.90 --- <0.05 0.0036 0.0012 0.0017 0.006 --- 11/16/05 4.6 <2.00 9 ---0.061 24 0.0033 0.0012 0.0014 0.0058 --- 2/16/06 3.6 <1.5 9 --- <0.05 0.0024 0.0014 0.0014 0.0057 --- 5/19/06 4.4 1.60 --- <0.05 0.0029 0.0015 0.0016 0.0057 --- 8/16/06 4.3 <1.5 9 --- <0.05 0.0030 0.0023 0.0016 0.0062 --- 11/16/06 4.3 <1.5 9 --- <0.05 0.0020 0.0011 0.0013 0.0050 --- 2/8/07 4.6 <2.0 9 --- <0.05 0.0021 0.0011 0.0016 0.0052 --- 5/9/07 4.3 <2.0 9 ---0.10 0.0023 0.0014 0.0014 0.0055 --- 7/3/07 --- 10/8/07 --- 1/24/08 4.2 <0.8 9 --- <0.05 0.0014 11 0.001 0.0014 0.00447 --- 4/23/08 3.9 <1.5 9 --- <0.05 0.0012 0.00086 0.0012 0.00403 --- 7/24/08 4.4 <1.5 9 --- <0.05 0.0011 0.00078 0.0012 0.00419 --- 10/22/08 4.1 <1.5 9 --- <0.05 0.0010 0.00081 0.0012 0.00403 J --- 1/22/09 3.8 <2.0 35,48 ---0.075 32 0.00092 0.00074 0.0012 0.00331 --- 4/23/09 4.0 <1.5 48 --- <0.05 0.00079 0.00061 0.0011 0.00353 --- 7/30/09 3.9 1.20 --- <0.05 0.00057 0.00062 0.0009 0.00292 --- 10/21/09 2.8 1.8 --- <0.05 0.00056 0.00057 0.00084 0.00261 --- 1/20/10 3.8 1.9 ---<0.05 0.00071 0.00067 0.00089 0.0025 --- 4/20/10 4.0 <2.0 48 ---<0.05 0.00058 0.00065 0.00094 0.00265 --- 7/21/10 2.6 1.2 43 ---<0.05 <0.0005 <0.0005 0.00073 0.00233 --- 10/20/10 3.8 1.5 ---<0.05 <0.0005 0.00054 0.00077 0.00226 ---1/27/11 4.0 1.2 ---<0.05 0.00052 <0.0005 0.00092 0.00252 ---4/21/11 3.6 1.4 ---<0.05 0.00055 0.00058 0.00088 0.00265 --- 7/20/11 3.2 <1.5 48 ---<0.05 <0.0005 <0.0005 0.00072 0.00253 --- 10/19/11 2.6 1.4 --- 0.082 <0.0005 <0.0005 0.00064 0.0015 ---1/20/12 3.7 1.4 ---<0.05 <0.0005 <0.0005 0.00076 0.00219 MW-19 --- 4/15/03 9.8 2.50 --- <0.05 2.0 0.042 0.03 0.091 --- 5/8/03 14 4.40 ---0.22 4 3.2 0.051 0.067 0.097 --- 8/21/03 15 2.50 ---0.08 3.5 0.06 0.19 0.11 --- 11/13/03 16 5.40 ---0.270 4 2.7 0.062 0.21 0.082 --- 2/20/04 17 3.70 ---0.19 16 3.4 0.079 0.35 0.116 --- 6/3/04 12 4.30 ---0.25 4 2.9 0.046 0.14 0.061 --- 9/9/04 17 2.20 ---0.078 16 4.0 0.097 0.33 0.127 --- 12/10/04 14 1.90 ---0.110 4 3.1 0.076 0.24 0.101 --- 2/25/05 15 1.60 --- <0.05 2.8 0.078 0.28 0.128 --- 5/27/05 15 2.20 ---0.100 16 3.2 0.033 <0.0025 0.064 --- 8/24/05 14 2.10 --- <0.05 2.9 0.087 0.28 0.137 --- 11/16/05 14 <2.00 9 --- <0.05 3.2 0.067 0.17 0.091 Not sampled - no access agreement Not sampled - no access agreement I:\Tidewater\TW Stockton (P2A)\Tables\QMR Tables\2012\1Q12\20120305-Parcel2A (Tables 4,5,6,7) Historical GW Tables 1Q12-CL.xlsx Page 11 of 67