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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 MW-54 --- 5/24/05 0.31 2.20 0.480140.018 <0.0005 <0.0005 <0.0011 0.0032 0.110 --- --- 8/24/05 0.85 2.0 <0.05 0.009 0.00087 <0.0005 0.0029 0.0035 0.099 0.023 --- 11/16/05 1.0 1.4 <0.05 0.0097 0.0016 <0.0005 0.0041 0.0037 0.100 --- --- 2/15/06 0.93 1.3 <0.05 0.014 0.0017 <0.0005 0.0043 0.0035 0.100 0.065 --- 5/17/06 0.99 2.1 0.05316 0.016 0.0015 <0.0005 0.0037 0.0039 0.098 --- --- 8/17/06 0.59 0.82 <0.05 0.0036 0.00082 <0.0005 0.0012 0.0040 0.079 0.014 --- 11/16/06 1.3 1.1 <0.05 0.0016 0.001 <0.0005 0.0048 0.0031 0.068 --- --- 2/9/07 1.1 2.2 <0.05 0.00086 0.00083 <0.0005 0.0044 0.0031 0.058 0.02 --- 5/9/07 0.44 1.8 0.057 3' 0.00084 <0.0005 <0.0005 0.0012 0.0031 0.060 --- --- 7/5/07 0.75 2.1 0.064" 0.00091 0.00088 <0.0005 0.00317 0.0028 0.060 0.021 --- 10/9/07 1.3 2.5 0.07541 0.0031 0.0013 0.0013 0.0058 0.0035 0.063 --- --- 1/24/08 1.5 2.3 <0.05 0.0017 0.0015 0.00065 0.0059 0.0038 0.061 0.036 --- 4/23/08 0.70 2.2 0.09317 0.00066 <0.0005 <0.0005 0.0019 0.0038 0.068 --- --- 7/24/08 0.92 2.5 0.16" 0.0014 0.001 <0.0005 0.00412 0.0037 0.059 0.023 --- 10/23/08 1.8 2.6 <0.05 0.0016 0.0011 <0.0005 0.00463 0.0033 0.053 --- --- 1/22/09 1.1 1.9 0.19" 0.0012 0.00066 <0.0005 0.00288 0.0036 0.048 0.021 --- 4/23/09 0.61 1.9 0.26" 0.00069 0.00055 <0.0005 0.0014 0.0035 0.045 --- --- 7/30/09 0.61 1.8 <0.05 <0.0005 <0.0005 <0.0005 0.0011 0.0029 0.044 0.022 --- 10/21/09 0.9 2.6 0.237 0.00088 0.00052 <0.0005 0.00281 0.003 0.047 --- --- 1/22/10 0.97 1.9 0.086" 0.0009926 <0.0005 <0.0005 0.00258 0.0033 0.05 0.020 --- 4/22/10 1.2 2.3 0.1217 0.0024 0.00087 <0.0005 0.00357 0.0036 0.059 --- --- 7/22/10 1.7 2.8 0.14" 0.0036 0.0014 <0.0005 0.005 0.0037'1 0.059 0.031 --- 10/21/10 1.3 2.2 <0.05 0.0029 0.00072 <0.0005 0.00418 0.004 0.064 --- --- 1/27/11 1.2 2.0 0.1142 0.0032 0.001 <0.0005 0.0035 0.004 0.065 0.019 --- 4/21/11 1.2 2.5 <0.05 0.0018 0.0005 <0.0005 0.00345 0.0033 0.068 --- --- 7/20/11 1.5 2.1 0.08" 0.0019 0.00065 <0.0005 0.00342 0.0037 0.059 0.023 --- 10/20/11 0.91 1.9 0.2017 0.0015 0.00078 <0.0005 0.00272 0.0039 0.060 --- --- 1/20/12 1.3 1.8 <0.05 0.00093 <0.0005 <0.0005 0.0014 0.0037 0.058 0.017 --- 4/19/12 1.0 2.2 <0.05 0.00097 <0.0005 <0.0005 0.0019 0.0037 0.058 --- --- 7/19/12 1.2 2.3 0.26" 0.0012" 0.00069 11 <0.0005 0.0030 0.0041 0.058 --- --- 10/17/12 1.4 2.5 0.25 36 0.00099 0.00065 <0.0005 0.0028 0.003 0.056 --- MW-61 --- 10/22/08 0.14 0.68 0.181, <0.0005 <0.0005 <0.0005 0.0006 <0.0005 <0.005 --- --- 1/23/09 0.072 0.40 <0.05 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.005 <0.005 --- 4/23/09 0.055 0.37 <0.05 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.005 --- --- 7/29/09 <0.05 0.26 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 0.010 --- 10/20/09 <0.05 0.8641 0.4536 <0.000511 <0.0005 <0.0005 0.00078 <0.0005 <0.005 --- --- 1/20/10 <0.05 0.2941 0.253fi 0.00098 0.001 <0.0005 0.0014 <0.0005 <0.005 0.0082 --- 4/20/10 <0.05 0.11 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 --- --- 7/20/10 <0.05 0.054 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 0.0070 --- 10/19/10 <0.05 0.10 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005" <0.005" --- 1/25/11 <0.05 0.25 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 0.0078 --- 4/19/11 <0.05 0.2741 0.1111 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 --- --- 7/19/11 <0.05 0.32 0.12" <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 0.011 --- 10/18/11 <0.05 0.32 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 --- --- 1/19/12 <0.05 0.31 <0.05 <0.000511 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 0.0094 --- 4/17/12 <0.05 0.16 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 --- --- 7/17/12 <0.05 0.078 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 --- --- 10/15/12 Not sampled per MRP No.R5-2012-0805 Stantec 20120924-Parcel2A(Tables 4,5,6,7)Historical GW Tables 4Q12.xlsx Page 42 of 61