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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 b s) Sampled (mg/1) (mg/1) (mg/1) (mg/1) (m /I (m /I (m /I (mg/1) D Zone Wells-Areas 2A/2B And Adjacent Areas(cont.) MW-69 --- 10/22/08 <0.05 0.22 --- 0.074 <0.0005 <0.0005 <0.0005 <0.001 --- 1/21/09 <0.05 0.17 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 4/23/09 <0.05 0.17 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 7/30/09 <0.05 0.16 --- 0.06136 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/21/09 <0.05 0.57 41 --- 0.069 36 0.00057 <0.0005 <0.0005 0.0007 --- 1/20/10 <0.05 0.25 --- 0.097 36 <0.0005 <0.0005 <0.0005 0.00058 --- 4/20/10 <0.05 0.16 --- 0.074 36 <0.0005 <0.0005 <0.0005 <0.0005 --- 7/20/10 <0.05 0.093 --- 0.056 3' <0.0005 <0.0005 <0.0005 <0.0005 --- 10/19/10 <0.05 0.18 --- 0.075 36 <0.0005 <0.0005 <0.0005 <0.0005 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 0.1511 0.0035 0.00065 0.0079 --- 1/20/10 0.51 0.4841 --- 0.436 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 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 1.418 --- 0.49 31 0.09 0.0013 0.0011 0.0035 --- 4/22/09 1.8 0.5547 --- 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 <1.546 --- 0.08136 0.0280 0.00093 0.001 0.0033 --- 1/20/10 1.8 <1.5 46 --- 0.15 36 0.02426 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 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 <0.000526 <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 3' <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 Stantec I:\Tidewater\TW Stockton(Parcel 2A-0415)\Tables\QMR Tables\2010\4Q10\20101117-Parcel2A(Tables 4,5,6,7)Historical GW Tables 4Q10.xls Page 53 of 67