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Tab _ <br /> Groundwater AiWcal Results <br /> Chevron Service Station#9-6171 <br /> 6633 Pacific Avenue <br /> Stockton,California Analytical values are in arts per billion(ppb) <br /> BIS- BUTYL- <br /> DATE ETHANOL TBA MTBE DIPE ETBE TAME (2-ETHYLHEXYL) BENZYL- <br /> PHTHALATE PHTHALATE <br /> MW-7 <br /> 11/11/97 <1000 <200 70 <4 0 <40 <40 <br /> 03/01/98 <500 <100 51 <2 0 <2 0 <20 - <br /> 11/17/99 <1000 <200 322 <2 0 <2 0 <2 0 <br /> 02/16/00 <3000 <200 51 <20 <20 <20 <br /> OW-1 <br /> 04/23/98 <3100 <620 <12 <12 <12 <12 <br /> 05/11/98 <1200 <250 <5 0 <5 0 <5 0 <50 - <br /> 11/18/98 <625 <125 44 <2 5 <2 5 <2 5 <br /> 12/23/98 -- -- -- - 15 99 <br /> 02/23/99 <3000 <200 82 3* <2 0 <2 0 396 - <br /> 05/19/99 <1000 <200 216 <20 <20 <2 0 <br /> 08/26/99 <1000 <200 351 <20 <20 <20 <br /> 11/17/99 <1000 <200 892 <20 <2 0 <20 - <br /> 02/16/00 <3000 <200 <20 <20 <2 0 <20 - <br /> 05/22/00 <500 <100 <20 <20 <20 <20 -- <br /> * Sample analyzed pass hold-time for EPA 8260 confirmation due to LIM system error at Lab <br /> EXPLANATIONS <br /> Groundwater laboratory analytical results prior to May 22,2000,were compiled from reports prepared by Blaine Tech Services,Inc <br /> TBA=Tertiary butyl alcohol <br /> MTBE=Methyl tertiary butyl ether <br /> DIPE=Di-isopropyl ether <br /> ETBE=Ethyl tertiary butyl ether <br /> TAME=Tertiary amyl methyl ether <br /> --=Not Analyzed <br /> 9 6171 xls/#385121 16 As of 05/22/00 <br />