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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-19(cont.) --- 7/19/10 Not sampled due to Sheen --- 10/18/10 Not sampled due to Sheen --- 1/24/11 Not sampled due to Sheen --- 4/18/11 Not sampled due to Sheen --- 7/18/11 Not sampled due to Sheen --- 10/17/11 Not sampled due to Sheen --- 1/17/12 Not sampled due to Sheen --- 4/16/12 Not sampled due to Sheen --- 7/16/12 Not sampled due to Sheen --- 10/15/12 Not sampled due to Sheen MW-20 --- 4/15/03 1.0 31.0 0.062° <0.0005 <0.0005 <0.0005 <0.001 0.00058 <0.005 0.026 --- 5/8/03 0.8 44.0 0.54 <0.0005 <0.0005 <0.0005 <0.001 0.00061 <0.005 0.039 --- 8/21/03 0.97 3.9 <0.05 <0.0005 <0.0005 <0.0005 <0.001 0.00080 <0.005 0.048 --- 11/13/03 0.60 23.0 0.2604 <0.0005 <0.0005 <0.0005 <0.001 0.0011 <0.005 0.0199 --- 2/20/04 0.46 16.0 0.141fi 0.00067 <0.0005 <0.0005 <0.001 0.0014 <0.005 0.087 --- 6/2/04 0.57 14.0 0.1616 <0.0005 <0.0005 <0.0005 <0.001 0.0014 <0.005 --- --- 9/9/04 0.65 5.4 0.07116 0.00052 0.00052 <0.0005 <0.001 0.0014 <0.005 0.067 --- 12/9/04 0.62 6.7 <0.05 <0.0005 <0.0005 <0.0005 <0.001 0.0015 <0.005 --- --- 2/25/05 0.61 5.2 <0.05 <0.0005 <0.0005 <0.0005 <0.001 0.0011 <0.005 0.067 --- 5/24/05 0.84 8.4 0.06714 <0.0005 <0.0005 <0.0005 <0.001 0.00098 <0.005 --- --- 8/24/05 0.50 3.0 <0.05 <0.0005 <0.0005 <0.0005 <0.001 0.00092 <0.005 0.068 --- 11/16/05 0.48 5.5 <0.05 <0.0005 0.00052 <0.0005 <0.0015 0.0012 <0.005 --- --- 2/16/06 0.46 2.3 <0.05 <0.0005 <0.0005 <0.0005 0.00064 0.001 <0.005 0.1 --- 5/19/06 0.48 2.4 <0.05 <0.0005 0.00055 <0.0005 <0.001 0.0012 <0.005 --- --- 8/16/06 0.41 11 0.128 <0.0005 0.0013 <0.0005 <0.0015 --- --- 0.055 --- 11/16/06 0.58 2.4 <0.05 <0.0005 0.00057 <0.0005 <0.00111 0.0014 <0.005 --- --- 2/7/07 0.52 2.6 <0.05 <0.0005 0.00054 <0.0005 <0.001 0.0012 <0.005 0.1 --- 5/9/07 0.60 2.8 <0.05 <0.0005 <0.0005 <0.0005 <0.001 0.0010 <0.005 --- --- 7/3/07 Not sampled-no access agreement --- 10/8/07 Not sampled-no access agreement --- 1/25/08 0.49 2.1 <0.05 <0.0005 <0.0005 <0.0005 <0.001 0.00091 <0.005 0.059 --- 4/23/08 0.49 2.3 <0.05 <0.0005 <0.0005 <0.0005 <0.001 0.00083 <0.005 --- --- 7/24/08 0.50 3.2 <0.05 <0.0005 <0.0005 <0.0005 <0.001 0.00089 <0.005 0.078 --- 10/22/08 0.50 2.8 <0.05 <0.0005 <0.0005 <0.0005 <0.001 0.00066 <0.005 --- --- 1/21/09 0.48 3.8 0.0926 <0.0005 <0.0005 <0.0005 <0.001 0.0011 <0.005 0.078 --- 4/22/09 0.50 2.9 <0.05 <0.0005 <0.0005 <0.0005 <0.001 0.0008211 <0.005 --- --- 7/29/09 0.44 2.0 <0.05 <0.0005 <0.0005 <0.0005 0.00054 0.00077 <0.005 0.11 --- 10/20/09 0.37 3.9 0.0673' <0.000511 <0.0005 <0.0005 <0.0005 0.00062 <0.005 --- --- 1/21/10 0.47 3.6 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 0.00062 <0.005 0.11 --- 4/20/10 0.53 2.5 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 0.0006 <0.005 --- --- 7/22/10 0.45 2.7 <0.05 <0.0005 <0.0005 <0.0005 0.00060 0.0006911 <0.005 0.094 --- 10/21/10 0.49 3.3 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 0.00053 <0.005 --- --- 1/27/11 0.54 2.7 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 0.13 --- 4/21/11 0.45 2.3 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 --- --- 7/21/11 0.40 2.8 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 0.058 --- 10/20/11 0.36 3.1 0.07817 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 --- --- 1/18/12 0.42 2.8 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 0.038 --- 4/17/12 0.39 2.4 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 --- --- 7/17/12 0.41 2.3 <0.05 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.005 <0.0050 --- 10/16/12 0.39 3.1 <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 13 of 61