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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-73 --- 10/23/08 0.07 0.53 47 ---0.44 36 0.00085 <0.0005 <0.0005 0.00069 --- 1/21/09 0.093 0.28 49 ---0.26 31 0.0013 <0.0005 <0.0005 0.00082 --- 4/23/09 <0.05 0.56 47 ---0.47 36 0.00052 <0.0005 <0.0005 0.00058 --- 7/30/09 <0.05 0.42 ---0.13 37 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/20/09 <0.05 0.88 10 ---0.32 10,36 <0.0005 <0.0005 <0.0005 0.0006 --- 1/21/10 <0.05 0.16 ---0.058 37 <0.0005 <0.0005 <0.0005 <0.0005 --- 4/21/10 <0.05 0.20 ---0.10 37 <0.0005 <0.0005 <0.0005 0.00062 --- 7/20/10 <0.05 0.16 ---0.066 37 <0.0005 <0.0005 <0.0005 <0.0005 ---10/20/10 <0.05 0.064 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 1/26/11 <0.05 0.17 41 ---0.13 42 0.00056 <0.0005 <0.0005 <0.0005 --- 4/20/11 <0.05 0.06 41 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 7/20/11 <0.05 0.13 41 --- 0.056 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/19/11 <0.05 0.34 41 ---0.25 36 <0.0005 <0.0005 <0.0005 <0.0005 --- 1/19/12 <0.05 0.60 ---0.16 42 <0.0005 <0.0005 <0.0005 <0.0005 MW-74 --- 10/23/08 0.068 46 0.42 47 ---0.30 36 <0.0005 <0.0005 <0.0005 <0.001 --- 1/22/09 0.074 46 0.27 27,50 ---0.20 <0.0005 <0.0005 <0.0005 <0.001 --- 4/22/09 <0.05 0.10 47 ---0.055 36 <0.0005 <0.0005 <0.0005 <0.001 --- 7/30/09 <0.05 0.10 ---0.053 47 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/20/09 <0.05 0.28 52,41 ---0.096 52,36 <0.0005 <0.0005 <0.0005 <0.0005 --- 1/21/10 <0.05 0.22 47 ---0.16 <0.0005 <0.0005 <0.0005 <0.0005 --- 4/20/10 <0.05 0.49 49 ---0.71 <0.0005 <0.0005 <0.0005 0.00086 --- 7/20/10 <0.05 0.17 47 ---0.13 37 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/20/10 <0.05 <0.05 ---<0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 1/25/11 <0.05 0.11 41 ---<0.05 0.00056 <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 0.65 41 ---0.53 36 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/18/11 <0.05 0.56 41 ---0.54 36 <0.0005 <0.0005 <0.0005 <0.0005 --- 1/19/12 <0.05 0.24 41 ---0.06 36 <0.0005 <0.0005 <0.0005 <0.0005 Soil Borings SB-1 --- 3/13/03 0.52 <0.59 --- <0.05 <0.0005 <0.0005 <0.0005 0.0014 SB-2 --- 3/12/03 2.1 13.00 ---1.10 0.0012 <0.0005 0.0024 0.0082 SB-3 --- 3/11/03 0.27 20.00 ---2.20 <0.0005 <0.0005 <0.0005 <0.001 SB-4 --- 3/11/03 1.5 120.00 ---14.00 <0.0005 <0.0005 <0.0005 <0.001 SB-5 --- 3/12/03 0.65 2.00 ---0.10 <0.0005 <0.0005 <0.0005 <0.001 SB-6 --- 3/12/03 0.59 0.68 ---0.07 <0.0005 <0.0005 0.0013 0.0038 I:\Tidewater\TW Stockton (P2A)\Tables\QMR Tables\2012\1Q12\20120305-Parcel2A (Tables 4,5,6,7) Historical GW Tables 1Q12-CL.xlsx Page 52 of 67