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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) D Zone Wells - Areas 2A/2B And Adjacent Areas (cont.) MW-55 (cont.) --- 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 ---0.11 36 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 31 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 ---0.56 36 <0.0005 <0.0005 <0.0005 0.0011 --- 1/22/10 0.50 1.3 ---0.094 37 <0.0005 26 <0.0005 <0.0005 0.00092 --- 4/22/10 0.60 1.9 ---0.10 37 0.00055 <0.0005 <0.0005 0.00086 --- 7/22/10 0.61 1.9 ---0.14 37 <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 ---1/27/11 0.32 1.6 ---<0.05 0.00076 <0.0005 <0.0005 <0.0005 ---4/21/11 0.59 2.0 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 7/21/11 0.51 1.7 ---0.22 36 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/20/11 0.49 1.9 ---0.31 42 <0.0005 <0.0005 <0.0005 0.00054 ---1/20/12 0.36 1.6 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 MW-68 --- 10/22/08 <0.05 0.92 41 ---0.55 36 <0.0005 <0.0005 <0.0005 0.00058 J --- 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 ---0.11 36 <0.0005 11 <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 ---0.90 36 <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 --- 1/25/11 <0.05 0.25 41 ---0.095 42 <0.0005 <0.0005 <0.0005 <0.0005 --- 4/19/11 <0.05 0.39 ---0.091 36 <0.0005 <0.0005 <0.0005 <0.0005 --- 7/19/11 <0.05 0.44 ---0.092 36 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/18/11 <0.05 0.73 41 ---0.23 36 <0.0005 <0.0005 <0.0005 <0.0005 --- 1/19/12 <0.05 0.56 ---0.077 36 <0.0005 <0.0005 <0.0005 <0.0005 MW-69 --- 10/22/08 <0.05 0.22 ---0.074 36 <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 ---0.061 36 <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 37 <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 --- 1/25/11 <0.05 0.47 41 ---0.21 42 0.001 <0.0005 <0.0005 <0.0005 ---4/20/11 <0.05 0.093 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 7/19/11 <0.05 0.38 ---0.092 36 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/18/11 <0.05 0.30 41 ---0.20 36 <0.0005 <0.0005 <0.0005 <0.0005 --- 1/18/12 <0.05 0.24 41 ---0.076 36 <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 50 of 67