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i Table 2 Historical Soil Sample Analytical Results 7-Eleven Store#19976 1399 North Main Street Manteca,California ij Sample Ethyl MtBE MtBETotal Sample Date Depth Benzene Toluene Benzene Xylenes TPHg 8020 8260 DIPE EtBE TAME TBA 1,2-DC EDB Lead Notes I.D. Sampled (ft bgs) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (m9/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) Fuel System Upgrade Soil Samples Tl-S-15 09/19/96 15 0.93 12 6.8 40 220 <5.0 -- -- -- -- -- -- -- /S" T1-N-15 09/19/96 15 0.36 1.9 2 10 170 <0.50 -- -- -- -- -- -- -- -- < NQS T2-S-15 09/19/96 15 0.71 5.7 2.6 17 100 2.1 - -- -- -- -- -- -- �7-- T3-S-15 09/19/96 15 0.33 0.38 1.2 8.3 84 0.65 -- -- -- - -- - -- -- /O T3-N-15 09/19/96 15 0.41 1.8 2.5 19 180 2.7 0.35 7-- i E1-W-13 09/20/96 13 <0.005 <0.005 <0.005 0.0087 <1.0 <0.050 -- - -- - -- - - - /v E1-C-13 09/20/96 13 <0.005 <0.005 <0.005 <0.005 <1.0 <0.050 - - - - - - -- - E1-E-13 09/20/96 13 <0.005 <0.005 <0.005 <0.005 <1.0 <0.050 -- -- - - - -- -- < /V E1-E-15 09/20/96 15 <0.005 <0.005 <0.005 0.0072 <1.0 <0.050 - -- - -- -- -- - ��- E2-W-13 09/20/96 13 0.013 <0.005 0.0063 0.022 <1.0 <0.050 -- -- -- -- -- -- -- t%-- E2-C-13 09/20/96 13 <0.005 <0.005 <0.005 0.009 <1.0 <0.050 - - - __ __ _ _ __ -e D E2-E-13 09/20/96 13 <0.05 0.054 0.17 1.1 61 <0.50 - D1-4.5 05/27/03 4.5 <0.0050 <0.0050 <0.0050 <0.0050 <1.0 - <0.0050 <0.0050 <0.0050 <0.0050 <0.010 - -- 1.52 1-1-4.0 05/27/03 4 <0.0050 <0.0050 <0.0050 <0.0050 <1.0 - <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 - - 1.36 T1S@14' 06/09/03 14 <0.0050 <0.0050 <0.0050 <0.0050 <1.0 -- <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 -- - - T1N@13' 06/19/03 13 0.0060 <0.0050 0.088 0.17 9.3 - 3.3 <0.0050 <0.0050 0.0058 18 -- - -- T2S@12' 06/09/03 12 <0.0050 <0.0050 <0.0050 <0.0050 <1.0 -- <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 -- -- -- T2N@13' 06/19/03 13 0.0087 <0.0050 0.031 0.0071 6.7 - 1.5 <0.0050 <0.0050 <0.0050 4.5 - -- - T3S@13' 06/09/03 13 <0.0050 <0.0050 <0.0050 <0.0050 <1.0 - 0.0057 <0.0050 <0.0050 <0.0050 <0.0050 - - - T3N@13' 06/09/03 13 <0.0050 <0.0050 <0.0050 <0.0050 <1.0 - 0.32 <0.0050 <0.0050 <0.0050 1.1 - - - Monitoring Well Soil Samples MW-1 09/04/98 10 <0.001 <0.001 <0,001 <0.001 <0.1 <0.01 - __ _ _ __ 09/04/98 20 0.0057 <0.001 0.0073 0.0196 0.272 0.0829 - -- -- - -- - -- -- 09/04/98 30 <1 <1 <1 <1 14,000 <10 - - -- - -- - - -- 09/04/98 45 <1 <1 <1 <1 17,000 <10 - - -- - - 09/04/98 50 <0.005 <0.005 0.0122 0.0336 0.575 <0.05 0.0187 <0.005 <0.005 <0.005 <0.1 -- -- -- MW-2 09/04/98 15 <1 <1 <1 1.8 96 <10 -- -- -- -- -- <0.001 <0.1 <0.01 -- -- -- 09/04/98 20 <0.001 <0.001 <0.001 -- -- -- -- 09/04/98 25 0.0708 0.0404 0.0046 0.0265 <0.1 0.0406 -- -- -- -- -- -- -- 09/04/98 30 0.0025 0.0021 <0.001 0.0017 <0.1 <0.01 <0.005 <0.005 <0.005 <0.005 <0.1 -- -- - MW-3 09/04/98 15 <0.001 <0.001 <0.001 <0.001 <0.1 <0.01 - -- -- - -- -- - -- 09/04/98 25 <0.001 0.0016 <0.001 <0.001 0.811 <0.01 Q.d <0.005 <0.005 <0.005 <0.1 09/04/98 30 <0.001 <0.001 <0.001 <0.001 <0.1 <0.01 - - - < <0.001 <0.001 <0.1 <0.01 <0.005 <0.005 <0.005 <0.005 <0.1 MW-4A 05/17/99 20 <0.001 0.001 _ 05/17/99 45 <0.001 <0.001 <0.001 <0.001 <0.1 <0.01 <0.005 <0.005 <0.005 <0.005 <0.1 -- - - 05/17/99 50 <0.001 <0.001 <0.001 <0.001 <0.1 <0.01 <0.005 <0.005 <0.005 <0.005 <0.1 - - - I:\7-Eleven\7-11 Stores\19976\Tables\19976 Vapor Risk Assessment Tables.xls Pages 2 of 4 �"