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T3 <br /> Groundwater yhcal Results <br /> Chevron Service Station#9-8264 <br /> 3775 Tracy Boulevard <br /> Tracy,California <br /> DATE SAMPLE 10 ANALYTICAL MTBE TAME TPN-G <br /> METHOD (PPM) 4PPMJ (PPmj <br /> 07/30/99 MW-4 SPH EPA 8260 <300 -- <br /> 06/01/99 MW-4 6/99 ASTM D4815 <1,000 <1 000 -- <br /> 07/30/99 MW-4 Water EPA 8260 11,200' -- 170 <br /> 07/30/99 MW-3 Water EPA 8260 2,7401 -- 50 <br /> 07/30/99 87 octane' EPA 8260 86,000 -- -- <br /> 07/30/99 87 octane2 ASTM D4815 92,000 02 -- <br /> 07/30/99 89 octane' EPA 8260 2,420 -- <br /> 07/30199 89 octane2 ASTM D4815 2,200 <0 I -- <br /> 07/30/99 92 octane2 EPA 8260 132,000 -- <br /> 07/30/99 92 octane' ASTM D4815 110,000 094 -- <br /> EXPLANATIONS <br /> Groundwater laboratory analytical results were compiled from reports prepared by Blaine Tech Services,Inc <br /> MTBE=Methyl tertiary butyl ether <br /> TAME=Tertiary amyl methyl ether <br /> TPH-G=Total Petroleum Hydrocarbons as Gasoline <br /> (ppm)—Parts per million <br /> --=Not Analyzed <br /> Result reported in parts per billion(ppb) <br /> 2 Sample taken from onsite product pump 412 <br /> 9-8264 als/#386854 12 As of 04/26/04 <br />