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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) D Zone Wells - Areas 2A/2B And Adjacent Areas (cont.) MW-70 --- 10/23/08 1.7 0.36 --- <0.05 0.35 0.01 0.0022 0.0124 --- 1/22/09 1.4 0.40 --- <0.05 0.36 0.0097 0.0023 0.0127 --- 4/23/09 1.5 0.44 --- <0.05 0.35 0.009 0.002 0.0118 --- 7/30/09 1.3 0.35 ---0.078 36 0.30 0.0074 0.0015 0.0102 --- 10/21/09 0.7 0.42 41 ---0.12 36 0.15 11 0.0035 0.00065 0.0079 ---1/20/10 0.51 0.48 41 ---0.4 36 0.11 0.0028 0.00077 0.0048 --- 4/20/10 0.84 0.38 41 ---0.24 36 0.17 0.0042 <0.0005 0.0091 --- 7/21/10 0.87 0.22 ---<0.05 0.20 0.0049 0.00082 0.0070 --- 10/20/10 1.0 0.25 ---<0.05 0.22 0.0056 0.0011 0.0072 --- 1/26/11 0.52 0.33 ---0.10 42 0.054 0.0017 <0.0005 0.0049 --- 4/20/11 0.32 0.35 ---0.11 37 0.050 0.0012 <0.0005 0.00178 --- 7/20/11 1.1 1.0 ---0.084 36 0.24 0.0059 0.0014 0.00670 --- 10/19/11 0.89 0.82 ---0.26 36 0.19 0.0044 0.0010 0.0050 --- 1/18/12 0.72 0.58 ---0.086 36 0.12 0.0030 <0.0005 0.0057 MW-71 --- 10/23/08 2.3 <3.0 9 ---0.086 42 0.14 0.0018 0.0015 0.004 --- 1/21/09 1.5 1.4 18 ---0.49 31 0.09 0.0013 0.0011 0.0035 --- 4/22/09 1.8 0.55 47 ---0.24 36 0.0042 <0.0005 <0.0005 0.00075 --- 7/29/09 0.094 0.29 ---0.055 37 0.002 <0.0005 <0.0005 <0.0005 --- 10/21/09 1.9 <1.5 48 ---0.081 36 0.0280 0.00093 0.001 0.0033 --- 1/20/10 1.8 <1.5 48 ---0.15 36 0.024 26 0.0011 26 0.0011 26 0.004 --- 4/21/10 1.5 1.4 ---0.098 37 0.0069 0.0011 0.00065 0.0032 --- 7/21/10 0.31 0.52 ---<0.05 0.0011 <0.0005 <0.0005 <0.0005 --- 10/20/10 0.76 0.60 ---<0.05 0.0022 <0.0005 <0.0005 <0.0005 ---1/26/11 1.6 1.4 ---<0.05 0.0022 <0.0005 <0.0005 0.0011 --- 4/20/11 0.74 1.2 ---0.44 36 0.0021 <0.0005 <0.0005 <0.0005 --- 7/20/11 1.6 <1.5 48 ---<0.05 0.00065 <0.0005 <0.0005 0.00056 --- 10/19/11 1.3 1.4 ---0.17 36 0.0043 <0.0005 <0.0005 0.00054 ---1/19/12 1.3 1.2 ---<0.05 0.0038 <0.0005 <0.0005 0.00122 MW-72 --- 10/23/08 0.49 0.87 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 1/22/09 0.35 1.4 ---0.43 31 <0.0005 <0.0005 <0.0005 <0.001 --- 4/23/09 0.24 1.3 ---0.46 36 0.0006 <0.0005 <0.0005 0.0006 --- 7/30/09 0.21 0.68 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/22/09 0.35 1.2 --- <0.05 <0.0005 <0.0005 <0.0005 0.00062 --- 1/22/10 0.35 0.79 --- <0.05 <0.0005 26 <0.0005 <0.0005 0.00067 --- 4/21/10 0.39 1.0 ---0.07 37 <0.0005 <0.0005 <0.0005 <0.0005 --- 7/22/10 0.20 0.97 ---0.087 37 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/21/10 0.21 0.64 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 ---1/26/11 0.31 0.72 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 ---4/21/11 0.18 0.41 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 7/20/11 0.22 0.55 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/19/11 0.15 0.67 ---0.28 36 <0.0005 <0.0005 <0.0005 <0.0005 ---1/20/12 0.13 0.42 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 I:\Tidewater\TW Stockton (P2A)\Tables\QMR Tables\2012\1Q12\20120305-Parcel2A (Tables 4,5,6,7) Historical GW Tables 1Q12-CL.xlsx Page 51 of 67