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Table 4 Groundwater Analytical Data-Total Petroleum Hydrocarbons,BTEX,MTBE,TBA,and As South Shore Parcels-Parcel 2A and Adjacent Areas West Weber Avenue and North Lincoln Street Stockton,California Depth Ethyl- Sample (feet, Date TPHg TPHd TPHo Benzene Toluene benzene Xylenes MTBE TBA As ID b s) Sampled (mg/1) (mg/1) (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-16(cont.) --- 2/8/07 0.32 1.10 <0.05 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.005 <0.005 --- 5/8/07 0.3 1.3 <0.05 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.005 --- --- 7/3/07 0.066 0.41 <0.05 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.005 <0.005 --- 10/10/07 0.47 1.0 <0.05 0.016 0.036 0.0057 0.0276 <0.0005 <0.005 --- --- 1/23/08 0.28 0.93 <0.05 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.005 <0.005 --- 4/23/08 0.28 0.90 <0.05 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.005 --- --- 7/24/08 0.30 0.82 <0.05 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.005 <0.015 --- 10/23/08 0.20 0.61 <0.05 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.005 --- --- 1/21/09 0.087 0.36 <0.05 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.005 <0.005 --- 4/22/09 0.072 0.38 <0.05 <0.0005 <0.0005 <0.0005 <0.001 <0.0005" <0.005 --- --- 7/30/09 0.19 0.86 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 <0.0050 --- 10/22/09 <0.05 0.22 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 --- --- 1/22/10 0.22 1.0 <0.05 <0.00052b <0.0005 <0.0005 <0.0005 <0.0005 <0.005 <0.0050 --- 4/22/10 0.23 0.84 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 --- --- 7/22/10 <0.05 0.40 0.061 3' <0.0005 <0.0005 <0.0005 <0.0005 <0.0005" <0.005 <0.0050 --- 10/21/10 <0.05 0.28 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 --- --- 1/26/11 <0.05 0.11 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 <0.0050 --- 4/21/11 <0.05 0.099 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 --- --- 7/21/11 <0.05 0.069 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 <0.0050 --- 10/19/11 <0.05 0.30 41 0.1736 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 --- --- 1/19/12 <0.05 0.24 0.0936 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.00511 <0.0050 --- 4/18/12 0.13 0.77 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 --- --- 7/19/12 <0.05 0.2841 0.22 36 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 --- --- 10/16/12 0.067 0.32 0.098 36 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 --- MW-17 --- 4/15/03 8.1 13 0.664 0.4 0.03 0.19 0.0516 <0.002 0.088 0.082 --- 5/8/03 8.4 12 0.414 0.49 0.048 0.26 0.113 0.002 0.079 0.079 --- 8/21/03 9.3 9.9 0.224 0.56 0.053 0.25 0.137 <0.0025 0.088 0.049 --- 11/13/03 8.9 19 0.844 0.61 0.056 0.18 0.091 0.0026 0.079 <0.015 --- 2/20/04 7.3 25 1.216 0.48 0.049 0.15 0.0783 0.0023 0.077 0.043 --- 6/3/04 18 20 1.04 0.52 0.054 0.19 0.124 <0.0025 0.076 --- --- 9/9/04 9.1 15 0.52 4 0.7 0.058 0.17 0.108 <0.0025 0.065 0.027 --- 12/10/04 6.4 16 0.334 0.64 0.045 0.15 0.094 0.0048 0.12 --- --- 2/25/05 9.3 10 0.27 4 0.78 0.048 0.17 0.097 0.0037 0.12 0.018 --- 5/26/05 6.4 5.4 0.22014 0.45 0.017 0.039 0.0322 0.0032 0.12 --- --- 8/24/05 6.6 16 0.70 16,24 0.60 0.026 0.097 0.051 0.00281 0.10 0.016 --- 11/14/05 Not sampled due to Sheen --- 2/16/06 5.0 11 0.25 0.3811 0.089 26 0.058 0.078 0.0035 0.10 0.0274 --- 5/15/06 Not sampled due to Sheen --- 8/17/06 5.0 8.3 0.3521 0.24 0.013 0.046 0.0176 0.0034 0.088 0.013 --- 11/14/06 Not sampled due to Sheen --- 2/9/07 5.3 19 0.29'2 0.23 0.014 0.016 0.0179 0.0045 0.10 0.018 --- 5/9/07 4.6 12 0.5421 0.19 0.011 0.01 0.0143 0.0033 0.11 --- 7/5/07 4.9 38 2.3 36 0.37 0.016 0.026 0.0178 0.002 0.12 0.025 --- 10/8/07 Not sampled due to Sheen --- 1/21/08 Not sampled due to Sheen --- 4/21/08 Not sampled due to Sheen --- 7/21/08 Not sampled due to Sheen --- 10/20/08 Not sampled due to Sheen --- 1/19/09 Not sampled due to Sheen Stantec 20120924-Parcel2A(Tables 4,5,6,7)Historical GW Tables 4Q12.xlsx Page 26 of 61