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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) A Zone Wells-Area 2A/2B and Adjacent Areas(cont.) MW-11(cont.) --- 7/21/08 Well not sampled 45 --- 10/20/08 Well not sampled 45 --- 1/19/09 Well abandoned due to Unocal Excavation 51 2AMW-12 --- 10/14/99 1.2 3.00 <0.5 0.0046 0.0085 0.00064 0.0092 <0.005 --- --- --- 5/20/02 0.714 11(5.2) 0.834,6(<0.3) <0.005 <0.005 <0.005 <0.005 <0.005 --- 0.02 --- 9/30/02 0.42 11(10) <0.1(<0.1) <0.0005 <0.0005 0.0017 0.006 <0.0005 0.056 0.018 --- 12/5/02 0.4 4.7(2.5) <0.1(<0.1) <0.0005 0.00098 <0.0005 0.00245 <0.0005 0.07 <0.015 --- 3/5/03 0.32 3.4 0.0984 <0.0005 0.00053 <0.0005 0.0011 <0.0005 0.079 <0.015 --- 5/8/03 0.35 8.4 0.184 <0.0005 <0.0005 <0.0005 0.0011 <0.0005 0.08 0.013 --- 8/20/03 0.47 8.6 0.244 <0.0005 0.00054 <0.0005 0.0013 <0.0005 0.110 <0.0098 --- 11/12/03 0.35 12.0 0.374 <0.0005 <0.0005 <0.0005 0.0011 <0.0005 0.091 <0.015 --- 2/20/04 0.40 12.0 0.3516 <0.0005 0.00062 <0.0005 0.0013 <0.0005 0.046 0.026 --- 6/2/04 0.38 15.0 0.564 <0.0005 0.00097 <0.0005 0.0005 <0.0005 0.027 --- --- 9/9/04 0.45 7.0 0.1416 <0.0005 <0.0005 <0.0005 0.00166 <0.0005 0.044 0.021 --- 12/10/04 0.35 5.2 0.434 <0.0005 0.0075 <0.0005 0.00065 <0.0005 0.0069 --- --- 2/25/05 0.33 7.6 0.254 <0.0005 0.00063 <0.0005 <0.001 <0.0005 0.0160 0.015 --- 5/25/05 0.42 5.6 0.1116 <0.0005 <0.0005 <0.0005 0.00053 <0.0005 0.0096 --- --- 8/24/05 0.37 5.0 0.09314 <0.0005 <0.0005 <0.0005 0.0011 <0.0005 0.0066 0.019 --- 11/16/05 0.32 3.6 0.1620 <0.0005 <0.0005 <0.0005 0.00056 <0.0005 0.0094 --- --- 2/16/06 0.36 5.4 0.0716 <0.0005 <0.0005 <0.0005 0.00166 <0.0005 0.010 0.0426 --- 5/18/06 0.33 5.1 <0.05 <0.0005 <0.0005 <0.0005 0.00065 <0.0005 0.012 --- --- 8/16/06 0.42 5.6 0.1528 <0.0005 <0.0005 <0.0005 <0.0015 <0.0005 0.020 0.019 --- 11/16/2006 L0 0.33 1.8 <0.05 <0.0005 <0.0005 <0.0005 0.00064' <0.0005 0.021 --- --- 2/9/07 0.34 3.8 <0.05 <0.0005 <0.0005 <0.0005 0.00093 <0.0005 0.032 0.02 --- 5/8/07 0.28 3.9 0.1428 <0.0005 <0.0005 <0.0005 0.00086J34 <0.0005 0.042 --- --- 7/5/07 0.36 2.0 <0.05 <0.0005 <0.0005 <0.0005 0.00072' <0.0005 0.046 0.03 --- 10/9/07 0.34 4.7 <0.05 <0.0005 <0.0005 <0.0005 0.00076' <0.0005 0.062 --- --- 1/24/08 0.27 2.9 <0.05 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 0.022 0.013 --- 4/22/08 0.30 5.3 <0.05 <0.0005 <0.0005 <0.0005 0.00085 <0.0005 0.021 --- --- 7/24/08 0.33 6.0 <0.05 <0.0005 <0.0005 <0.0005 0.00083 <0.0005 0.020 0.035 --- 10/22/08 0.33 4.0 <0.05 <0.0005 <0.0005 <0.0005 0.0012 <0.0005 0.010 --- --- 1/21/09 0.32 4.3 0.062 28 <0.0005 <0.0005 <0.0005 0.00051 <0.0005 0.016 0.026 --- 4/21/09 0.26 3.8 <0.05 <0.0005 <0.0005 <0.0005 <0.001 <0.000511 0.0088 --- --- 7/29/09 0.16 4.7 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 0.012 0.036 --- 10/21/09 0.18 4.7 0.0923' <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 0.011 --- --- 1/22/10 0.17 2.8 <0.05 <0.000526 <0.0005 <0.0005 <0.0005 <0.0005 0.0086 0.032 --- 4/21/10 0.11 3.5 0.0813' <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 0.0092 --- --- 7/20/10 0.22 6.1 0.0713' <0.0005 <0.0005 <0.0005 0.00062 <0.0005 0.0079 0.033 --- 10/20/10 0.13 3.3 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 0.0099 --- --- 1/26/11 0.097 2.1 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 0.0061 0.022 --- 4/18/11 Well not sampled due to inaccessibility --- 7/19/11 0.17 2.2 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 0.0061 0.027 --- 10/21/11 0.13 1.7 0.078 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 --- --- 1/19/12 0.093 1.8 <0.05 <0.000511 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 0.022 --- 4/19/12 0.077 1.7 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 4 --- 7/17/12 0.055 1.4 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 0.016 --- 10/17/12 0.1 1.3 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 --- Stantec 20120924-Parcel2A(Tables 4,5,6,7)Historical GW Tables 4Q12.xlsx Page 8 of 61