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Table 1 <br /> Historical Soil Sample Analytical Results <br /> 7-Eleven Store#20632 <br /> 4627 Da Vinci Drive <br /> Stockton,CA <br /> Soil Sample Ethyl- MtBE Total <br /> Sample Date Depth Benzene Toluene benzene Xylenes TPHg 8020 8260 TBA DIPE ETBE TAME 1,2-DCA EDB Lead Notes <br /> I.D. ft bgs) (m Ikg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) <br /> Groundwater Monitoring Wells <br /> MW-1 09/22/97 5 <0.005 <0.005 <0.005 <0.005 <1 <0.05 0.02 0.036 <0.005 <0.005 <0.005 - - - <br /> 15 <0.005 1 <0.005 <0.005 <0.005 <1 <0.05 <0.005 <0.02 <0.005 <0.005 <0.005 - <br /> MW-2 09/22/97 10 <0.005 <0.005 <0.005 <0.005 <1 < 5 <0.005 <0.005 <0.005 <0.005 - -- <br /> 15 <0.005 <0.005 <0.005 <0.005 <1 0.09 0.12 3 <0.02 <0.005 <0.005 <0.005 - - - <br /> MW-3 09/22/97 5 <0.005 <0.005 <0.005 <0.005 <1 <0.0 -Z.'005 <0.005 <0.005 <0.005 <0.005 <br /> 20 <0.005 <0.005 <0.005 1 <0.005 <1 <0.05 <0.005 1 <0.02 <0.005 1 <0.005 <0.005 1 - - - <br /> MW-4 09/22/97 5 0.12 0.21 0.47 3.2 71 11 7.3 10 <0.005 <0.005 <0.005 - b <br /> 10 <0.005 <0.005 <0.005 0.014 <1 1.5 2.5 2.7 0.0059 <0.005 <0.005 - - - <br /> 15 <0.005 <0.005 <0.005 0.0066 <1 0.086 0.092 X0.02 <0.005 <0.005 <0.005 <br /> 20 <0.005 1 <0.005 <0.005 <0.005 <1 <0.05 1 0.032 <0.02 1 <0.005 <0.005 <0.005 - - <br /> MW-5 12/31/98 5 0.0046 <0.001 0.0041 0.0019 <1.0 <0.01 0.012 <0.1 <0.005 <0.005 <0.005 -- b <br /> 10 1.02 3.14 14.5 59.4 780 <5 <0.25 <5 <0.25 <0.25 <0.25 - - - <br /> 15 <0.001 <0.001 <0.001 <0.001 <1.0 <0.01 <0.005 <0.1 <0.005 <0.005 <0.005 - <br /> 20 <0.001 <0.001 <0.001 <0.001 <1.0 <0.01 <0.005 <0.1 <0.005 <0.005 <0.005 -- - - <br /> MW-6 04/08/02 10 <0.005 <0.005 <0.005 <0.005 <0.5 -- <0.02 <0.05 <0.02 <0.02 <0.02 <0.005 <0.005 -- <br /> 15 <0.005 <0.005 <0.005 <0.005 <0.5 - 1 <0.02 <0.05 <0.02 <0.02 <0.02 <0.005 <0.005 - <br /> MW-7 04/09/02 10 <0.005 <0.005 <0.005 <0.005 <0.5 - <0.02 <0.05 <0.02 <0.02 <0.02 <0.005 <0.005 <br /> 15 <0.005 <0.005 <0.005 <0.005 <0.5 - 2.4 <0.05 <0.02 <0.02 <0.02 <0.005 <0.005 - <br /> SPV-1 04/09/02 10 0.035 0.0062 0.150 0.141 13 1.2 1.4 <0.02 <0.02 <0.02 <0.005 <0.005 <br /> 15 <0.005 <0.005 <0.005 <0.005 <0.5 - 1.3 50 50.00 <0.02 <0.02 <0.005 <0.005 - <br /> SPV-2 04/09/02 10 <0.005 <0.005 <0.005 <0.005 1 <0.5 <0.02 <0.05 <0.02 <0.02 <0.02 <0.005 <0.005 - <br /> 15 <0.005 <0.005 <0.005 <0.005 <0.5 - .62 <0.05 <0.02 <0.02 <0.02 <0.005 <0.005 <br /> Stockpile Soil Samples <br /> SP1 ABCD 01/31/05 1 <0.0050 <0.0050 <0.0050 <0.0050 <1.0 -- <0.0050 1 1 1 1 1 1 4.65 <br /> Explanation <br /> ft bgs=Feet below ground surface TBA=Tert-butyl alcohol EDB=1,2-dibromoethane <br /> mg/kg=milligrams per kilogram or parts-per-million DIPE=Diisopropyl ether Total Lead via EPA Method 60108. <br /> <=Not detected above laboratory reporting limit ETBE=Ethyl tert-butyl ether <br /> TPHg=Total petroleum hydrocarbons-as-gasoline TAME=Tertiary-amyl methyl ether <br /> MtBE=Methyl tertiary butyl ether 1,2-DCA=1,2-dichloroethane <br /> a=Geoprobe soil borings drilled 25 degrees from vertical(sample depths corrected to vertacl depth bgs) <br /> b=MtBE and TBA concentrations exceeded calibration range. <br /> 20632 soil data.xlsx Page 3 of 3 <br />