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Table 2 Historical Soil Sample Analytical Results 7-Eleven Store#19976 1399 North Main Street Manteca,California Sample EthylMtBE I MtBE Total Sample Date Depth Benzene Toluene Benzene Xylenes TPHg 8020 8260 DIPE EtBE TAME TBA 11,2-DC EDB Lead Notes I.D. Sampled (ft bgs) (mglkg) (mg/kg) (mglkg) (mglkg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mgtkg) (mg/kg) (mg/kg) (m9�kg) (mgIkg) (mg/kg) MW-5 05/11/99 10 <0.005 <0.005 <0.005 <0.005 <1 <0.05 <0.005 <0.005 <0.005 <0.005 <0.02 - - -- 05/11/99 20 <0.005 <0.005 <0.005 <0.005 <1 <0.05 <0.005 <0.005 <0.005 <0.005 <0.02 - -- -- 05/11/99 30 0.034 0.026 0.025 0.13 <1 <0.05 <0.005 <0.005 <0.005 <0.005 <0.02 -- - -- 05/11/99 35 <0.005 <0.005 <0.005 <0.005 <1 <0.05 0.0059 <0.005 <0.005 <0.005 <0.02 -- -- -- 05/11/99 50 <0.005 <0.005 <0.005 <0.005 <1 <0.05 <0.005 <0.005 <0.005 <0.005 <0.02 - -- - MW-6 12/22/99 15 <0.001 <0.001 <0.001 <0.001 <0.1 <0.01 <0.01 <0.01 <0.01 <0.01 <0.2 -- -- - 12/22/99 20 <0.005 0.0258 0.117 0.0992 15.4 <0.05 <0.01 <0.01 <0.01 <0.01 <0.2 - -- - ; 12/22/99 25 <0.001 <0.001 <0.001 <0.001 <0.1 <0.01 <0.01 <0.01 <0.01 <0.01 <0.2 - -- -- MW-7 11/01/00 10 <0.005 <0.005 <0.005 <0.015 <1 - <0.005 <0.01 <0.01 <0.01 <0.1 -- --11/01/00 15 <0.005 <0.005 <0.005 <0.015 <1 - <0.005 <0.01 <0.01 <0.01 <0.1 -- -11/01/00 20 <0.005 <0.005 <0.005 <0.015 <1 -- 0.010 <0.01 <0.01 <0.01 <0.1 -- - - MW-8 11/29/06 5 <0.0050 <0.0050 <0.0050 <0.0050 <1.0 - <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 - - - 11/29/06 10 <0.0050 <0.0050 <0.0050 <0.0050 <1.0 -- <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 - - - 11/29/06 15 <0.0050 <0.0050 <0.0050 <0.0050 <1.0 -- <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 -- -- - 11/29/06 20 <0.0050 <0.0050 <0.0050 <0.0050 <1.0 - <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 -- - - 11/29/06 25 <0.0050 <0.0050 <0.0050 <0.0050 <1.0 -- <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 - -11/29/06 30 <0.0050 <0.0050 <0.0050 <0.0050 <1.0 - 0.028 <0.0050 <0.0050 <0.0050 0.046 - - -- 11/29/06 35 <0.0050 <0.0050 <0.0050 <0.0050 <1.0 - <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 - - - Remediation Well Soil Samples SP-1 10/29/01 14-14.5 <0.005 <0.005 <0.005 <0.005 <1 - 0.12 <0.005 <0.005 <0.005 <0.02 -- -- -- 10/29/01 19-19.5 <0.005 <0.005 <0.005 0.036 <1 - 0.047 <0.005 <0.005 <0.005 0.045 - -- - 10/29/01 24-24.5 0.6 0.2 0.39 1.8 23 -- 0.29 <0.025 <0.025 <0.025 0.25 - - - 10/29/01 29-29.5 0.095 0.12 0.07 0.41 2.7 - 0.037 <0.005 <0.005 <0.005 <0.02 -- -- -- 10/29/01 39-39.5 0.084 0.077 0.055 0.31 3.2 - 0.041 <0.005 <0.005 <0.005 <0.02 -- - - J 10/29/01 49-49.5 0.0081 0.0078 <0.005 0.026 <1 - 0.0051 <0.005 <0.005 <0.005 <0.02 - - - I:\7-Eleven\7-11 Stores\19976\Tables\19976 Vapor Risk Assessment Tables.xls Pages 3 of 4