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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) C Zone Wells - Areas 2A/2B And Adjacent Areas (cont.) MW-62 (cont.) --- 10/21/09 <0.05 0.45 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 1/20/10 <0.05 0.83 ---0.33 36 0.00084 <0.0005 0.00053 0.00288 --- 4/20/10 <0.05 0.53 --- 0.19 <0.0005 <0.0005 <0.0005 <0.0005 --- 7/20/10 <0.05 0.77 41 ---0.99 36 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/20/10 0.065 0.98 ---0.20 36 <0.0005 <0.0005 <0.0005 <0.0005 --- 1/25/11 <0.05 0.76 ---0.10 42 <0.0005 <0.0005 <0.0005 <0.0005 --- 4/19/11 <0.05 0.39 ---0.058 36 <0.0005 <0.0005 <0.0005 <0.0005 --- 7/19/11 <0.05 0.51 41 ---0.54 36 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/18/11 <0.05 0.71 ---0.31 36 <0.0005 <0.0005 <0.0005 <0.0005 --- 1/18/12 <0.05 0.54 47 ---0.15 36 <0.0005 <0.0005 <0.0005 0.00052 MW-63 --- 10/22/08 <0.05 0.093 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 1/22/09 <0.05 0.068 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 4/23/09 <0.05 0.099 47 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 7/30/09 <0.05 0.066 --- <0.05 0.00052 <0.0005 <0.0005 <0.0005 --- 10/21/09 <0.05 0.1 --- <0.05 0.001 <0.0005 <0.0005 <0.0005 --- 1/20/10 <0.05 0.15 47 ---0.067 36 0.00068 <0.0005 <0.0005 0.00056 --- 4/20/10 <0.05 0.34 --- 0.12 <0.0005 <0.0005 <0.0005 <0.0005 --- 7/21/10 <0.05 0.29 41 ---0.082 36 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/19/10 0.08 0.48 39,41 ---0.59 36,39 0.0013 0.00071 <0.0005 0.00051 --- 1/25/11 <0.05 0.21 41 ---0.061 42 0.00089 <0.0005 <0.0005 <0.0005 ---4/19/11 <0.05 0.069 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 7/19/11 <0.05 0.082 ---<0.05 0.0010 <0.0005 <0.0005 <0.0005 --- 10/19/11 0.07 0.18 --- 0.075 0.002 <0.0005 <0.0005 <0.0005 --- 1/18/12 <0.05 0.2 41 ---0.062 42 0.00093 <0.0005 <0.0005 <0.0005 MW-64 --- 10/23/08 2.3 <1.5 9 --- <0.05 0.038 0.0022 0.0017 0.0068 --- 1/21/09 1.3 <1.0 35,48 ---0.2 31 0.007 0.0013 0.0032 0.0178 --- 4/22/09 1.2 <1.5 48 ---0.24 36 0.0028 0.00085 0.00065 0.0043 --- 7/29/09 1.5 0.91 --- <0.05 0.0012 0.00057 0.00053 0.003 --- 10/21/09 1.8 <1 48 --- <0.05 0.0012 0.00055 0.00063 0.0036 --- 1/20/10 1.8 <1.5 48 ---0.094 36 0.00098 0.0006 0.00068 0.0035 --- 4/21/10 1.6 <1.5 48 ---0.28 36 0.001 0.0022 0.00058 0.0046 --- 7/21/10 1.4 1.3 43 ---<0.05 <0.0005 <0.0005 <0.0005 0.0021 --- 10/20/10 3.0 1.6 43 ---<0.05 0.00086 0.00052 0.00095 0.0021 --- 1/26/11 2.3 1.7 ---0.091 42 0.001 0.00061 0.0010 0.00194 --- 4/20/11 2.2 <2.0 41 --- 0.45 0.0019 0.0009 0.00075 0.00193 --- 7/20/11 1.9 <1.0 48 ---<0.05 0.00097 0.00060 0.0012 0.00224 --- 10/19/11 2.7 1.5 --- 0.12 0.00083 0.00098 0.0014 0.0035 --- 1/19/12 2.0 <1.5 48 ---<0.05 0.00096 <0.0005 0.00059 0.00242 MW-65 --- 10/23/08 1.7 46 2.4 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 1/22/09 0.68 2.2 ---0.068 31 <0.0005 <0.0005 <0.0005 <0.001 --- 4/23/09 0.28 2.0 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 7/30/09 0.17 1.5 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/22/09 0.23 2.4 --- <0.05 <0.0005 <0.0005 <0.0005 0.00053 --- 1/22/10 0.29 1.6 ---<0.05 <0.0005 26 <0.0005 <0.0005 <0.0005 --- 4/22/10 0.32 2.3 ---0.073 37 <0.0005 <0.0005 <0.0005 <0.0005 --- 7/22/10 0.16 1.7 ---0.081 37 <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 48 of 67