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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 TPI-Ig 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/26 and Adjacent Areas(cont.) 2AMW-14 --- 10/14/99 1.4 13.00 3.50 0.0025 0.0060 0.0025 0.019 <0.005 --- --- --- 10/14/99 1.1 18.00 4.70 0.0034 0.0056 0.0036 0.042 <0.005 --- --- --- 5/26/05 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 Sheen --- 2/5/07 Not sampled due to Sheen --- 5/7/07 Not sampled due to SPH --- 7/3/07 Not sampled due to SPH --- 10/8/07 Not sampled due to Sheen --- 1/21/08 Not sampled due to Sheen --- 4/21/08 Not sampled due to SPH --- 7/21/08 Not sampled due to Sheen --- 10/20/08 Not sampled due to Sheen --- 1/19/09 Not sampled due to Sheen --- 4/20/09 Not sampled due to Sheen --- 7/27/09 Not sampled due to Sheen --- 10/19/09 Not sampled due to Sheen --- 1/18/10 Not sampled due to Sheen --- 4/19/10 Not sampled due to Sheen --- 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 pled-Inadvertently missed. 2AMW-15 --- 10/14/99 0.068 0.09 <0.50 <0.0005 0.0017 0.00054 0.0027 <0.005 --- --- --- 5/20/02 <0.05 0.19(<0.05) <0.3(<0.3) <0.005 <0.005 <0.005 <0.005 <0.005 --- 0.0095 --- 9/30/02 <0.05 0.076(<0.05) <0.1(<0.1) <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.005 <0.005 --- 12/5/02 <0.05 0.11(0.072) <0.05(<0.05) <0.0005 <0.0005 <0.0005 <0.001 --- --- 0.012 --- 3/5/03 0.57 0.07(0.072) <0.05(<0.05) <0.0005 0.012 0.066 0.191 <0.0005 <0.005 0.014 --- 5/8/03 <0.05 0.47(<0.05) 0.054"(<0.05) <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.005 0.0093 --- 8/19/03 0.069 0.22(<0.05) 0.055 B(<0.05) <0.0005 <0.0005 0.0025 0.0067 --- --- 0.011 --- 11/11/03" <0.05 0.35(<0.05) <0.05(<0.05) <0.0005 <0.0005 <0.0005 <0.001 --- --- <0.005 --- 02/17/04" <0.05 0.38(0.085) 0.058(<0.05) <0.0005 <0.0005 <0.0005 <0.001 --- --- 0.0061 --- 6/2/04" <0.05 0.46(<0.05) 0.1716(<0.05'b) <0.0005 <0.0005 <0.0005 <0.001 --- --- --- --- 9/7/0412 Not Sampled Due to Transfer of Environmental Consultant Management Responsibilities --- 12/6/04" <0.05 0.17 <0.10 <0.0005 <0.0005 0.0027 <0.001 <0.0005" <0.005'u --- --- 2/2/05" <0.05 0.16 <0.05 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.005 0.012 --- 5/25/05 <0.05 0.17 <0.05 <0.0005 <0.0005 <0.0005 <0.001 <0.0005 <0.005 --- --- 8/24/05 <0.05 0.19 <0.05 <0.0005 <0.0005 <0.0005 <0.0015 <0.0005 <0.005 0.0092 --- 11/17/05 <0.05 0.20 <0.05 <0.0005 <0.0005 <0.0005 <0.0015 <0.0005 <0.005 --- StanWc 20120924-Parcel2A(Tables 4,5,6,7)Historical GW Tables 4Q12.xlsx Page 10 of 61