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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) C Zone Wells-Areas 2A/2B And Adjacent Areas(cont.) MW-67(cont.) --- 4/20/11 <0.05 <0.05 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 --- --- 7/20/11 <0.05 0.07541 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 0.021 --- 10/18/11 <0.05 0.2641 0.25" <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 --- --- 1/19/12 <0.05 0.15 41 0.082 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005" 0.017 --- 4/18/12 <0.05 0.2541 0.12 36 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 --- --- 7/18/12 <0.05 0.27 41 0.41 36 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 --- --- 10/16/12 <0.05 0.5341 1.1 36 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 --- D Zone Wells-Areas 2A/2B And Adjacent Areas MW-55 --- 5/24/05 0.16 2.0 0.190 <0.0005 <0.0005 <0.0005 <0.001 0.0020 0.082 --- --- 8/24/05 0.77 2.0 0.1214 0.011 0.00091 <0.0005 0.0022 0.0014 0.065 0.0250 --- 11/16/05 0.93 1.4 0.07524 0.0057 0.0018 <0.0005 0.0028 0.0015 0.072 --- --- 2/15/06 0.70 1.3 <0.05 0.0016 <0.0005 <0.0005 0.0035 0.0015 0.078 0.0565 --- 5/17/06 1.50 2.3 <0.05 0.0053 0.0017 <0.0005 0.0035 0.0022 0.089 --- --- 8/17/06 1.00 1.1 <0.05 0.0031 0.0013 <0.0005 0.00248 0.0011 0.050 0.023 --- 11/16/06 1.40 1.3 <0.05 0.0055 0.0012 <0.0005 0.003 0.0018 0.071 --- --- 2/8/07 1.60 2.5 <0.05 0.009 0.0016 <0.0005 0.0043 0.0022 0.076 0.046 --- 5/9/07 0.89 2.0 0.068" 0.0039 0.0014 <0.0005 0.0037 0.002 0.076 --- --- 7/5/07 0.76 1.6 0.08617 0.0028 0.0014 <0.0005 0.00263 0.0015 0.060 0.023 --- 10/9/07 0.90 1.6 0.05442 0.0041 0.0014 0.0014 0.0046 0.002 0.062 --- --- 1/24/08 0.86 1.9 <0.05 0.0021 0.00096 <0.0005 0.0035 0.0016 0.060 0.030 --- 4/23/08 0.44 1.5 0.09 36 0.00055 <0.0005 <0.0005 0.00176 0.0015 0.052 --- --- 7/24/08 0.65 1.9 0.1136 0.00094 0.00075 <0.0005 0.00249 0.0015 0.044 0.026 --- 10/23/08 1.00 1.9 <0.05 0.0011 0.00058 <0.0005 0.00302 0.002 0.054 --- --- 1/22/09 0.52 1.6 0.3231 0.00068 <0.0005 <0.0005 0.00097 0.0013 0.037 0.030 --- 4/23/09 0.13 1.2 0.16 36 0.0006 <0.0005 <0.0005 0.00058 0.001 0.035 --- --- 7/30/09 0.47 1.3 <0.05 <0.0005 <0.0005 <0.0005 0.00074 0.001 0.020 0.032 --- 10/21/09 0.30 2.3 0.5636 <0.0005 <0.0005 <0.0005 0.0011 0.001 0.033 --- --- 1/22/10 0.50 1.3 0.0943' <0.00052b <0.0005 <0.0005 0.00092 0.0015 0.029 0.031 --- 4/22/10 0.60 1.9 0.10" 0.00055 <0.0005 <0.0005 0.00086 0.0016 0.031 --- --- 7/22/10 0.61 1.9 0.143' <0.0005 <0.0005 <0.0005 0.00070 0.00211 0.034 0.040 --- 10/21/10 0.66 1.9 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 0.0015 0.025 --- --- 1/27/11 0.32 1.6 <0.05 0.00076 <0.0005 <0.0005 <0.0005 0.0015 0.025 0.027 --- 4/21/11 0.59 2.0 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 0.0016 0.028 --- --- 7/21/11 0.51 1.7 0.2236 <0.0005 <0.0005 <0.0005 <0.0005 0.0019 0.026 0.037 --- 10/20/11 0.49 1.9 0.31" <0.0005 <0.0005 <0.0005 0.00054 0.0018 0.025 --- --- 1/20/12 0.36 1.6 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 0.0016 0.024 0.027 --- 4/19/12 0.48 1.8 0.069" <0.0005 <0.0005 <0.0005 <0.0005 0.0018 0.025 --- --- 7/19/12 0.51 2.2 0.3617 <0.0005" 0.00053 11 <0.0005 0.00056 0.0019 0.027 --- --- 10/17/12 0.54 2.1 0.66 36 <0.0005 <0.0005 <0.0005 <0.0005 0.0013 0.025 --- MW-68 --- 10/22/08 <0.05 0.92 41 0.55 36 <0.0005 <0.0005 <0.0005 0.00058 3 <0.0005 <0.005 --- --- 1/22/09 <0.05 0.30 <0.05 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.005 0.02 --- 4/23/09 <0.05 0.33 <0.05 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.005 --- --- 7/29/09 <0.05 0.3 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 0.024 --- 10/20/09 <0.05 0.68 0.1131 <0.0005" <0.0005 <0.0005 0.00059 <0.0005 <0.005 --- --- 1/20/10 <0.05 0.4 0.1736 0.00074 0.00067 <0.0005 0.00089 <0.0005 <0.005 0.025 --- 4/20/10 <0.05 0.26 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 --- --- 7/20/10 <0.05 0.641 0.901, <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 0.029 Stantec 20120924-Parcel2A(Tables 4,5,6,7)Historical GW Tables 4Q12.xlsx Page 45 of 61