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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/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) D Zone Wells-Areas 2A/2B And Adjacent Areas MW-55 --- 5/24/05 0.16 2.0 --- 0.190 <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 --- 0.07524 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 3' 0.0039 0.0014 <0.0005 0.0037 --- 7/5/07 0.76 1.6 --- 0.086 3' 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 --- 4/23/08 0.44 1.5 --- 0.09 36 0.00055 <0.0005 <0.0005 0.00176 --- 7/24/08 0.65 1.9 --- 0.1136 0.00094 0.00075 <0.0005 0.00249 --- 10/23/08 1.00 1.9 --- <0.05 0.0011 0.00058 <0.0005 0.00302 --- 1/22/09 0.52 1.6 --- 0.32 3' 0.00068 <0.0005 <0.0005 0.00097 --- 4/23/09 0.13 1.2 --- 0.16 36 0.0006 <0.0005 <0.0005 0.00058 --- 7/30/09 0.47 1.3 --- <0.05 <0.0005 <0.0005 <0.0005 0.00074 --- 10/21/09 0.30 2.3 --- 0.5636 <0.0005 <0.0005 <0.0005 0.0011 --- 1/22/10 0.50 1.3 --- 0.09431 <0.000521 <0.0005 <0.0005 0.00092 --- 4/22/10 0.60 1.9 --- 0.1031 0.00055 <0.0005 <0.0005 0.00086 --- 7/22/10 0.61 1.9 --- 0.14 3' <0.0005 <0.0005 <0.0005 0.00070 --- 10/21/10 0.66 1.9 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0005 MW-68 --- 10/22/08 <0.05 0.92 4' --- 0.55 36 <0.0005 <0.0005 <0.0005 0.00058 --- 1/22/09 <0.05 0.30 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 4/23/09 <0.05 0.33 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 7/29/09 <0.05 0.3 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/20/09 <0.05 0.68 --- 0.1136 <0.000511 <0.0005 <0.0005 0.00059 --- 1/20/10 <0.05 0.4 --- 0.17 36 0.00074 0.00067 <0.0005 0.00089 --- 4/20/10 <0.05 0.26 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 7/20/10 <0.05 0.6 41 --- 0.901, <0.0005 <0.0005 <0.0005 <0.0005 --- 10/19/10 <0.05 0.45 --- 0.094 36 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 52 of 67