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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-5(cont.) --- 5/5/03 2.8 <2.0(<0.07) 0.057 4(<0.05) <0.001 0.0088 0.074 0.19 --- --- 0.034 --- 8/19/03" 2.3 <1.5'(<0.80') 0.096 B4(0.057 B4) <0.0005 0.00091 0.0078 0.0149 0.057 <0.005 0.022 --- 11/11/03" 3.3 <1.5'(<0.80 9) <0.05(<0.05) <0.0005 <0.0005 0.0024 <0.001 0.046 <0.005 0.0084 --- 02/18/04" 1.8 <1.5 v(<1.0 5) 0.08 (<0.05) <0.0005 <0.0005 0.0016 <0.001 0.029 <0.005 0.035 --- 6/2/04" 2.2 <1.5 9(<1.0 1) 0.2(0.065) <0.001 <0.001 0.0032 0.0045 0.026 <0.01 --- --- 6/2/04" 2.2 <1.5'(<1.0') 0.077 16(<0.05'5) <0.001 <0.001 0.0032 0.0042 0.027 <0.01 --- --- 9/7/04" 2.3 <1.5 9(<1.0 1) <0.10(<O.10) <0.0005 <0.0005 0.0014 <0.001 0.027 <0.005 <0.05 --- 12/6/04" 1.9 <1.5 5 <0.10 <0.0015 <0.0015 0.0018 <0.0015 0.025 <0.007 --- --- 2/2/05" 1.5 <0.80 s <0.05 <0.001 <0.001 0.0011 <0.002 0.019 <0.01 0.028 --- 5/25/05 Not sampled due to broken monument --- 8/24/05 1.2 <0.80 s <0.05 <0.0005 <0.0005 0.00055 <0.0015 0.015 <0.005 0.026 --- 11/17/05 1.1 <0.80 5 <0.05 <0.0005 <0.0005 0.00060 <0.0015 0.014 <0.005 --- --- 2/14/06 0.39 <0.40 s <0.05 <0.0005 <0.0005 <0.0005 <0.0015 0.013 <0.005 0.027 --- 5/15/06 0.2 <0.20 5 <0.05 <0.0005 <0.0005 <0.0005 <0.0015 0.012 <0.005 --- --- 8/14/06 0.13 0.18 <0.05 <0.0005 <0.0005 <0.0005 <0.0015 0.012 <0.005 0.034 --- 11/14/06 0.51" 0.14 <0.05 <0.0005 <0.0005 <0.0005 <0.0015 0.0094 <0.005 --- --- 2/5/07 0.27 0.24 0.097 <0.0005 <0.0005 <0.0005 <0.0015 0.0094 <0.005 0.0277 --- 5/7/07 0.35 0.27 <0.05 0.002 <0.0005 <0.0005 <0.0015 0.011 <0.005 --- --- 7/2/07 0.24 0.26 <0.05 0.0017 <0.0005 <0.0005 <0.0015 0.0088 <0.005 0.028 --- 10/8/07 0.37 0.27 0.072 36 <0.0005 <0.0005 <0.0005 <0.0015 0.0086 <0.005 --- --- 1/21/08 0.38 0.26 <0.05 <0.0005 <0.0005 <0.0005 <0.0015 0.0079 <0.005 0.0447 --- 4/21/08 0.24 0.4641 <0.05 <0.0005 <0.0005 <0.0005 <0.0015 0.0059 <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-6 33 7/24/90 47 23.00 --- 0.018 7.4 3.1 12 --- --- --- --- 10/18/96 91 0.24 <0.2 0.14 21 15 55 --- --- 0.023 --- 1/19/99 81.1 --- --- 0.0595(ND)* 6.54(6.09)* 9.08(8.94)* 30.1(30.1)* <0.4 <8.0 --- --- 2/27/99 --- 0.89 --- --- --- --- --- --- --- --- --- 9/2/99 88.9 1.08 --- <0.0005 4.96 9.22 26 --- --- --- --- 5/20/02 22 0.58(<0.05) 0.47 4,1(<0.3) <0.13 1.1 2.7 7.32 <0.13 --- <0.005 --- 9/30/02 44 <0.1(<0.1) 2.4(2.1) <0.02 2.2 5.1 14.6 <0.02 <0.2 <0.005 --- 12/5/02 160 <0.2(<0.05) <0.05(<0.05) <0.02 0.8 1.8 4.96 --- --- <0.005 --- 3/5/03 33 0.21(0.091) <0.05(<0.05) <0.02 1.6 3.9 9.87 <0.02 <0.2 <0.005 --- 5/5/03 32 1.0(0.091) 0.17 4(<0.05) <0.02 1.3 3.4 8.48 --- --- 0.0067 --- 8/18/03" 77 0.504(0.17 4) 0.41 B4(0.25 B4) <0.05 1.4 10 25.1 <0.05 <0.5 <0.005 --- 11/11/03" 78 0.714(0.0724) 0.264(0.1704) <0.05 0.37 9.7 25.61 <0.05" <0.5 0.0062 --- 02/17/04" 42 0.89(0.23) 0.304(0.224) <0.025 1.7 4.2 11.1 <0.025 <0.25 0.0062 --- 6/2/04" 46 3.415(1.015) 3.2(2.1) <0.05 1.4 6.6 17.9 <0.05 <0.5 --- --- 9/7/04 12 Not Sampled Due to Transfer of Environmental Consultant Management Responsibilities --- 12/6/04" 35 0.18 <0.10 <0.02 1.3 4.4 12.1 <0.02" <0.20" --- 2/2/05" 23 0.21 <0.05 <0.02 0.65 3.3 8.06 <0.02 <0.20 <0.005 --- 5/25/05 Not sampled due to broken monument --- 8/24/05 20 0.21 0.19'" <0.005 0.50 2.0 6.73 <0.005" <0.025 <0.005 --- 11/17/05 26 0.23 <0.05 <0.005 0.62 3.1 10.4 <0.005 <0.025 --- --- 2/14/06 41 0.13 0.15 m <0.025 0.72 5.3 14.1 <0.025 <0.150 <0.005 --- 5/15/06 22 0.23 <0.05 <0.005 0.51 2.3 6.11 <0.005 <0.025 --- --- 8/14/06 20 0.19 <0.05 <0.015 0.50 2.8 6.60 <0.015 <0.070 <0.005 --- 11/14/06 20 0.14 <0.05 <0.009 0.36 2.5 6.33 <0.009 <0.005 --- StanWc 20120924-Parcel2A(Tables 4,5,6,7)Historical GW Tables 4Q12.xlsx Page 3 of 61