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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) B Zone Wells-Areas 2A/2B And Adjacent Areas(cont.) MW-59 --- 10/23/08 0.44 0.16 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 1/21/09 0.77 0.15 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 4/22/09 1.1 0.25 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 7/29/09 1.3 0.30 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/21/09 0.6 0.2 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 1/20/10 0.77 0.15 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 4/21/10 1.5 0.44 --- 0.083 37 <0.0005 <0.0005 <0.0005 <0.0005 --- 7/21/10 0.95 0.31 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/20/10 1.0 0.80 --- 0.29 36 <0.0005 <0.0005 <0.0005 <0.0005 MW-60 --- 10/23/08 <0.05 0.11 47 --- 0.053 36 0.00063 <0.0005 <0.0005 <0.001 --- 1/21/09 <0.05 <0.05 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 4/22/09 <0.05 0.095 47 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 7/29/09 <0.05 0.26 41 --- 0.063 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/20/09 <0.05 0.73 47 --- 0.8 36 <0.0005 <0.0005 <0.0005 0.00145 --- 1/21/10 <0.05 0.062 63 --- 0.055 <0.0005 <0.0005 <0.0005 <0.0005 --- 4/20/10 <0.05 0.92 41 --- 1.4 <0.0005 <0.0005 <0.0005 0.00074 --- 7/20/10 <0.05 0.16 47 --- 0.12 36 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/20/10 <0.05 0.08847 --- 0.078 <0.0005 <0.0005 <0.0005 <0.0005 C Zone Wells-Areas 2A/2B And Adjacent Areas MW-54 --- 5/24/05 0.31 2.20 --- 0.480 14 0.018 <0.0005 <0.0005 <0.0011 --- 8/24/05 0.85 2.0 --- <0.05 0.009 0.00087 <0.0005 0.0029 --- 11/16/05 1.0 1.4 --- <0.05 0.0097 0.0016 <0.0005 0.0041 --- 2/15/06 0.93 1.3 --- <0.05 0.014 0.0017 <0.0005 0.0043 --- 5/17/06 0.99 2.1 --- 0.05316 0.016 0.0015 <0.0005 0.0037 --- 8/17/06 0.59 0.82 --- <0.05 0.0036 0.00082 <0.0005 0.0012 --- 11/16/06 1.3 1.1 --- <0.05 0.0016 0.001 <0.0005 0.0048 --- 2/9/07 1.1 2.2 --- <0.05 0.00086 0.00083 <0.0005 0.0044 --- 5/9/07 0.44 1.8 --- 0.057 31 0.00084 <0.0005 <0.0005 0.0012 --- 7/5/07 0.75 2.1 --- 0.064 37 0.00091 0.00088 <0.0005 0.00317 --- 10/9/07 1.3 2.5 --- 0.075 42 0.0031 0.0013 0.0013 0.0058 --- 1/24/08 1.5 2.3 --- <0.05 0.0017 0.0015 0.00065 0.0059 --- 4/23/08 0.70 2.2 --- 0.093 37 0.00066 <0.0005 <0.0005 0.0019 --- 7/24/08 0.92 2.5 --- 0.16 37 0.0014 0.001 <0.0005 0.00412 --- 10/23/08 1.8 2.6 --- <0.05 0.0016 0.0011 <0.0005 0.00463 --- 1/22/09 1.1 1.9 --- 0.1931 0.0012 0.00066 <0.0005 0.00288 --- 4/23/09 0.61 1.9 --- 0.26 36 0.00069 0.00055 <0.0005 0.0014 --- 7/30/09 0.61 1.8 --- <0.05 <0.0005 <0.0005 <0.0005 0.0011 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 49 of 67