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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-65 (cont.) --- 10/21/10 0.14 1.5 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 ---1/27/11 0.39 1.9 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 ---4/21/11 0.17 1.2 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 7/21/11 0.12 1.5 ---0.066 37 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/19/11 0.25 1.7 ---0.092 42 <0.0005 <0.0005 <0.0005 <0.0005 ---1/20/12 0.35 1.6 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 MW-66 --- 10/23/08 3.8 <0.80 9 ---0.064 36 0.041 0.015 0.0036 0.0376 --- 1/21/09 2.9 <0.80 35,48 ---0.21 31 0.029 0.0095 0.002 0.0271 --- 4/23/09 1.8 <0.80 48 ---0.14 36 0.017 0.0048 0.00062 0.0158 --- 7/30/09 1.1 <0.40 48 --- <0.05 0.0082 0.0022 <0.0005 0.0096 --- 10/20/09 1.6 <1 48 ---0.1 36 0.017 0.0044 0.0007 0.0146 --- 1/21/10 2.2 <0.6 48 ---<0.05 0.018 0.005 0.0014 0.0134 --- 4/20/10 1.1 <0.4 48 ---0.064 36 0.011 0.003 0.00079 0.00766 --- 7/20/10 0.59 <0.4 48 ---0.070 37 0.0052 0.0013 <0.0005 0.003 --- 10/20/10 0.74 <0.3 48 ---<0.05 0.0054 0.0009 <0.0005 0.0024 --- 1/26/11 1.0 <0.3 48 ---<0.05 0.0069 0.0016 <0.0005 0.0038 --- 4/20/11 0.52 <0.2 48 ---<0.05 0.0029 <0.0005 <0.0005 0.0012 --- 7/20/11 0.48 <0.10 48 ---<0.05 0.0022 0.00069 <0.0005 0.00150 --- 10/20/11 0.70 <0.30 48 ---0.076 36 0.0041 0.0014 <0.0005 0.0032 --- 1/19/12 0.89 <0.30 48 ---<0.05 0.0047 0.0020 <0.0005 0.0045 MW-67 --- 10/23/08 <0.05 0.29 47 ---0.23 36 <0.0005 <0.0005 <0.0005 <0.001 --- 1/22/09 <0.05 <0.05 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 4/22/09 <0.05 0.082 47 ---0.091 36 <0.0005 <0.0005 <0.0005 <0.001 --- 7/29/09 <0.05 0.069 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/20/09 <0.05 0.48 10,41 ---0.25 10,36 <0.0005 <0.0005 <0.0005 <0.0005 --- 1/21/10 <0.05 0.095 47 --- 0.11 <0.0005 <0.0005 <0.0005 0.00052 --- 4/20/10 <0.05 0.18 47 ---0.25 36 <0.0005 <0.0005 <0.0005 0.0008 --- 7/20/10 <0.05 0.18 47 ---0.14 36 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/20/10 <0.05 <0.05 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 1/25/11 <0.05 0.079 41 ---0.051 42 <0.0005 <0.0005 <0.0005 <0.0005 ---4/20/11 <0.05 <0.05 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 7/20/11 <0.05 0.075 41 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/18/11 <0.05 0.26 41 ---0.25 36 <0.0005 <0.0005 <0.0005 <0.0005 --- 1/19/12 <0.05 0.15 41 --- 0.082 <0.0005 <0.0005 <0.0005 <0.0005 D Zone Wells - Areas 2A/2B And Adjacent Areas MW-55 --- 5/24/05 0.16 2.0 ---0.190 24 <0.0005 <0.0005 <0.0005 <0.001 --- 8/24/05 0.77 2.0 ---0.12 24 0.011 0.00091 <0.0005 0.0022 --- 11/16/05 0.93 1.4 ---0.075 24 0.0057 0.0018 <0.0005 0.0028 --- 2/15/06 0.70 1.3 --- <0.05 0.0016 <0.0005 <0.0005 0.0035 --- 5/17/06 1.50 2.3 --- <0.05 0.0053 0.0017 <0.0005 0.0035 --- 8/17/06 1.00 1.1 --- <0.05 0.0031 0.0013 <0.0005 0.00248 --- 11/16/06 1.40 1.3 --- <0.05 0.0055 0.0012 <0.0005 0.003 --- 2/8/07 1.60 2.5 --- <0.05 0.009 0.0016 <0.0005 0.0043 --- 5/9/07 0.89 2.0 ---0.068 31 0.0039 0.0014 <0.0005 0.0037 --- 7/5/07 0.76 1.6 ---0.086 37 0.0028 0.0014 <0.0005 0.00263 --- 10/9/07 0.90 1.6 ---0.054 42 0.0041 0.0014 0.0014 0.0046 --- 1/24/08 0.86 1.9 --- <0.05 0.0021 0.00096 <0.0005 0.0035 I:\Tidewater\TW Stockton (P2A)\Tables\QMR Tables\2012\1Q12\20120305-Parcel2A (Tables 4,5,6,7) Historical GW Tables 1Q12-CL.xlsx Page 49 of 67