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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-17 --- 4/15/03 8.1 13 ---0.66 4 0.4 0.03 0.19 0.0516 --- 5/8/03 8.4 12 ---0.41 4 0.49 0.048 0.26 0.113 --- 8/21/03 9.3 9.9 ---0.22 4 0.56 0.053 0.25 0.137 --- 11/13/03 8.9 19 ---0.84 4 0.61 0.056 0.18 0.091 --- 2/20/04 7.3 25 ---1.2 16 0.48 0.049 0.15 0.0783 --- 6/3/04 18 20 ---1.0 4 0.52 0.054 0.19 0.124 --- 9/9/04 9.1 15 ---0.52 4 0.7 0.058 0.17 0.108 --- 12/10/04 6.4 16 ---0.33 4 0.64 0.045 0.15 0.094 --- 2/25/05 9.3 10 ---0.27 4 0.78 0.048 0.17 0.097 --- 5/26/05 6.4 5.4 ---0.220 24 0.45 0.017 0.039 0.0322 --- 8/24/05 6.6 16 ---0.70 16,24 0.60 0.026 0.097 0.051 --- 11/14/05 --- 2/16/06 5.0 11 ---0.25 0.38 11 0.089 26 0.058 0.078 --- 5/15/06 --- 8/17/06 5.0 8.3 ---0.35 28 0.24 0.013 0.046 0.0176 --- 11/14/06 --- 2/9/07 5.3 19 ---0.29 32 0.23 0.014 0.016 0.0179 --- 5/9/07 4.6 12 ---0.54 28 0.19 0.011 0.01 0.0143 --- 7/5/07 4.9 38 ---2.3 36 0.37 0.016 0.026 0.0178 --- 10/8/07 --- 1/21/08 --- 4/21/08 --- 7/21/08 --- 10/20/08 --- 1/19/09 --- 4/23/09 4.7 28 ---0.70 0.31 0.012 0.0066 0.0152 --- 7/27/09 --- 10/19/09 --- 1/18/10 --- 4/19/10 --- 7/19/10 --- 10/18/10 ---1/24/11 ---4/18/11 ---7/18/11 ---10/17/11 ---1/17/12 MW-24 --- 4/15/03 <0.05 0.06 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 5/6/03 <0.05 0.47 ---0.96 4 <0.0005 <0.0005 <0.0005 <0.001 --- 8/20/03 <0.05 0.10 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 11/12/03 <0.05 0.53 ---0.14 4 <0.0005 <0.0005 <0.0005 <0.001 --- 2/18/04 <0.05 1.30 ---0.25 16 <0.0005 <0.0005 <0.0005 <0.001 --- 6/2/04 <0.05 0.49 ---0.095 16 <0.0005 <0.0005 <0.0005 <0.001 --- 9/9/04 <0.05 0.19 ---0.110 16 <0.0005 <0.0005 <0.0005 <0.001 --- 12/8/04 <0.05 0.14 ---0.059 16 <0.0005 <0.0005 <0.0005 <0.001 Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen Not sampled due to Sheen I:\Tidewater\TW Stockton (P2A)\Tables\QMR Tables\2012\1Q12\20120305-Parcel2A (Tables 4,5,6,7) Historical GW Tables 1Q12-CL.xlsx Page 32 of 67