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Table 4 Groundwater Analytical Data-Total Petroleum Hydrocarbons and BTEX South Shore Parcels-Parcel 2A and Adjacent Areas West Weber Avenue and North Lincoln Street Stockton,California Depth Ethyl- Sample (feet, Date TPHg TPHd TPHk TPHo Benzene Toluene benzene Xylenes ID bgs) Sampled (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) (mg/1) B Zone Wells-Areas 2A/2B And Adjacent Areas cont. MW-35(cont.) --- 7/3/07 <0.05 0.056 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 10/9/07 <0.05 <0.05 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 1/22/08 <0.05 0.061 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 4/22/08 <0.05 <0.05 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 7/22/08 <0.05 <0.05 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 10/21/08 <0.05 <0.05 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 1/20/09 <0.05 <0.05 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 4/21/09 <0.05 <0.05 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 7/28/09 <0.05 <0.05 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 10/20/09 <0.05 0.094 41 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 1/20/10 <0.05 <0.05 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 4/19/10 <0.05 0.05141 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0005 --- 7/20/10 <0.05 <0.05 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0005 MW-40 --- 5/25/05 Not Sampled due to SPH --- 8/24/05 Not Sampled due to SPH --- 11/14/05 Not Sampled due to SPH --- 2/16/06 Not Sampled due to SPH --- 5/15/06 Not Sampled due to SPH --- 8/14/06 Not Sampled due to SPH --- 11/14/06 Not Sampled due to SPH --- 2/5/07 Not Sampled due to SPH --- 5/7/07 Not Sampled due to SPH --- 7/3/07 Not Sampled due to SPH --- 10/8/07 Not Sampled due to SPH --- 1/21/08 Not Sampled due to Sheen --- 4/23/08 Not Sampled due to SPH --- 7/21/08 Not Sampled due to SPH --- 10/20/08 Not Sampled due to SPH --- 1/19/09 Well abandoned due to Unocal Excavation 51 MW-41 --- 6/3/04 0.2 2.214 --- 0.170 4'74 <0.0005 <0.0005 0.00065 <0.001 --- 9/8/04 0.29 0.64 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 12/9/04 0.34 1.60 --- 0.067'6 <0.0005 <0.0005 <0.0005 <0.001 --- 2/24/05 0.39 1.60 --- 0.140 4 <0.0005 <0.0005 <0.0005 <0.001 --- 5/25/05 0.14 1.20 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 8/24/05 0.24 1.10 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 --- 11/16/05 0.2 0.86 --- <0.05 <0.0005 <0.0005 <0.0005 <0.0015 --- 2/15/06 0.26 0.820 --- <0.05 <0.0005 <0.0005 <0.0005 <0.001 Stantec I:\Tidewater\TW Stockton(Parcel 2A-0415)\Tables\QMR Tables\2010\4Q10\20101117-Parcel2A(Tables 4,5,6,7)Historical GW Tables 4Q10.xls Page 40 of 67