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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 (m /I (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) A Zone Wells-Area 2A/2B and Adjacent Areas(cont.) MW-7(cont.) --- 1/24/11 Well not sampled" --- 4/18/11 Well not sampled 45 --- 7/19/11 Well not sampled 45 --- 10/17/11 Well not sampled 45 --- 1/17/12 Well not sampled 45 --- 4/16/12 Well not sampled 45 --- 7/16/12 Well not sampled 45 --- Well not sampled MW-8 --- 10/18/96 0.05 <0.05 <0.20 0.0019 0.0086 0.0015 0.005 --- --- 0.028 --- 1/19/99 <0.05 --- <0.0005(ND)* <0.0005(ND)* <0.0005(ND)* <0.0005(ND)* 0.0177 <0.02 --- --- 2/27/99 --- 0.06 --- --- --- --- --- --- -- --- 9/2/99 <0.05 <0.05 --- <0.0005 0.00093 <0.0005 <0.0005 --- --- --- --- 5/20/02 <0.05 0.07(<0.05) <0.3(<0.3) <0.005 <0.005 <0.005 <0.005 0.0094 --- 0.022 --- 9/30/02 <0.05 0.072(<0.05) <0.1(<0.1) <0.0005 <0.0005 <0.0005 <0.001 0.014 <0.005 0.044 --- 12/5/02 <0.05 <0.05(<0.05) <0.05(0.055) <0.0005 <0.0005 <0.0005 <0.001 0.021 <0.005 0.021 --- 3/5/03 <0.05 0.064(<0.05) <0.05(<0.05) <0.0005 <0.0005 <0.0005 <0.001 0.015 <0.005 0.023 --- 5/5/03 0.54 0.17(<0.05) 0.068 4(<0.05) <0.0005 0.0057 0.054 0.14 --- --- 0.024 --- 8/18/03" <0.05 .060(<0.05) <0.05(<0.05) <0.0005 <0.0005 <0.0005 <0.001 0.0079 --- 0.022 --- 11/11/03" <0.05 0.061(<0.05) <0.05(<0.05) <0.0005 <0.0005 <0.0005 <0.001 0.0017 --- 0.022 --- 07/18/04" <0.05 0.17(<0.05) 0.054(<0.05) <0.0005 <0.0005 <0.0005 <0.001 0.011 --- 0.024 --- 6/2/04" <0.05 0.19(<0.05) 0.06616(<0.05 15) <0.0005 0.00068 0.0028 0.0071 0.014 --- --- --- 9/7/0412 <0.05 <0.05(<0.05) <0.1(<0.1) <0.0005 <0.0005 <0.0005 <0.001 0.015 --- <0.05 --- 12/6/04 23 <0.05 <0.05 <0.10 <0.0005 <0.0005 <0.0005 <0.001 0.015 <0.005 --- --- 2/2/05" <0.05 <0.05 <0.05 <0.0005 <0.0005 <0.0005 <0.001 0.012 <0.005 0.026 --- 5/25/05 <0.05 <0.05 <0.05 <0.0005 <0.0005 <0.0005 <0.001 0.0084 <0.005 --- --- 8/24/2005 <0.05 <0.05 <0.05 <0.0005 <0.0005 <0.0005 <0.0015 0.006 <0.005 0.027 --- 11/17/2005 <0.05 0.07 <0.05 <0.0005 <0.0005 <0.0005 <0.0015 0.0093 <0.005 --- --- 2/14/06 <0.05 <0.05 <0.05 <0.0005 <0.0005 <0.0005 <0.0015 0.0066 <0.005 0.027 --- 5/15/06 <0.05 <0.05 <0.05 <0.0005 <0.0005 <0.0005 <0.0015 0.004 <0.005 --- --- 8/14/06 <0.05 0.10 <0.05 <0.0005 <0.0005 <0.0005 <0.0015 0.0084 <0.005 0.027 --- 11/14/06 <0.05 <0.05 <0.05 <0.0005 <0.0005 <0.0005 <0.0015 0.0087 <0.005 --- --- 2/5/07 <0.05 0.06 0.068 <0.0005 <0.0005 <0.0005 <0.0015 0.004 <0.005 <0.01 --- 5/7/07 <0.05 0.08 0.12' <0.0005 <0.0005 <0.0005 <0.0015 0.0044 <0.005 --- --- 7/2/07 <0.05 <0.05 <0.05 <0.0005 <0.0005 <0.0005 <0.0015 0.004 <0.005 0.032 --- 10/8/07 <0.05 0.066 41 0.066 36 <0.0005 <0.0005 <0.0005 <0.0015 0.0034 <0.005 --- --- 1/21/08 <0.05 0.07341 0.1138 <0.0005 <0.0005 <0.0005 <0.0015 0.0033 <0.005 0.0442 --- 4/21/08 <0.05 0.06541 <0.05 <0.0005 <0.0005 <0.0005 <0.0015 0.0034 <0.005 --- --- 7/21/08 Well not sampled 45 --- 10/20/08 Well not sampled 45 --- 1/19/09 Well abandoned due to Unocal Excavation 51 MW-9 --- 10/18/96 4.6 2.30 <0.20 1.1 0.016 0.16 0.11 --- --- 0.11 (FD) --- 10/18/96^ 4.1 2.50 <0.20 0.94 0.013 0.15 0.13 0.13 --- 0.11 --- 1/19/99 5.77 --- 1.42(1.33)* 0.0266(ND)* 0.0254(ND)* 0.0264(ND)* <0.05 <1.0 --- --- 2/27/99 --- 6.41 --- --- --- --- --- --- --- --- 9/2/99 5.53 6.29 --- 3.16 0.06 0.0776 0.0976 --- --- --- --- 5/20/02 4.44 14(1.8) 1.74'6(<0.3) 0.92 <0.036 <0.036 <0.036 <0.036 --- 0.26 --- 9/30/02 3.9 7.6(3.4) <0.1(<0.1) 0.74 0.034 0.0095 0.032 0.012 0.084 0.25 --- 12/5/02 3.7 5.9(1.6) <0.1(<0.1) 0.56 0.0089 0.0068 0.0069 0.0096 0.082 0.277 StanWc 20120924-Parcel2A(Tables 4,5,6,7)Historical GW Tables 4Q12.xlsx Page 5 of 61