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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) B Zone Wells - Areas 2A/2B And Adjacent Areas (cont.) MW-57 (cont.) --- 1/25/11 <0.05 0.13 ---0.053 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 --- 7/19/11 <0.05 0.27 41 ---0.21 36 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/18/11 <0.05 0.073 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 1/18/12 <0.05 0.18 41 ---0.055 36 <0.0005 <0.0005 <0.0005 <0.0005 MW-58 --- 10/22/08 1.9 <0.60 9 --- <0.05 0.0037 0.0013 0.00061 0.0043 --- 1/22/09 1.6 <0.50 35,48 --- <0.05 0.0073 0.0015 0.00086 0.00418 --- 4/23/09 1.2 <0.50 48 --- <0.05 0.0066 0.0012 0.00072 0.00397 --- 7/30/09 1.6 <0.50 48 ---0.054 36 0.0076 0.0015 0.00086 0.0045 --- 10/21/09 0.4 0.45 41 ---0.15 36 0.0031 0.00078 <0.0005 0.0019 --- 1/20/10 1.4 0.48 --- 0.078 0.008 0.0017 0.00089 0.00528 --- 4/20/10 <0.05 0.064 41 --- 0.053 <0.0005 <0.0005 <0.0005 <0.0005 --- 7/20/10 0.94 0.55 41 ---0.52 36 0.0049 0.0013 0.00053 0.00371 --- 10/19/10 <0.05 0.10 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 ---1/26/11 2.5 0.53 ---<0.05 0.0082 0.0023 0.00092 0.0073 ---4/20/11 <0.05 <0.05 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 7/20/11 2.5 <0.60 48 ---<0.05 0.0083 0.0026 0.0011 0.00780 --- 10/19/11 <0.05 0.13 41 ---0.089 36 <0.0005 <0.0005 <0.0005 <0.0005 --- 1/18/12 2.0 0.5 53 ---0.096 36 0.0067 0.0022 0.00083 0.0064 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 0.20 --- <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 --- 1/26/11 0.92 0.49 41 ---0.29 42 0.00068 <0.0005 <0.0005 <0.0005 --- 4/20/11 1.5 0.25 ---0.068 36 <0.0005 <0.0005 <0.0005 <0.0005 --- 7/20/11 1.2 0.15 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/19/11 1.2 0.85 ---0.13 42 <0.0005 <0.0005 <0.0005 <0.0005 --- 1/19/12 1.4 0.54 ---0.12 36 <0.0005 11 <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 53 --- 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 0.088 47 --- 0.078 <0.0005 <0.0005 <0.0005 <0.0005 --- 1/26/11 <0.05 0.084 41 ---0.078 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 0.10 41 ---0.13 36 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/18/11 <0.05 0.92 41 ---0.70 36 <0.0005 <0.0005 <0.0005 <0.0005 --- 1/19/12 <0.05 0.49 ---0.13 42 <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 46 of 67