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V <br /> Taw <br /> Groundwater AWFflcal Results <br /> Former Chevron Service Station#9-8632 <br /> 575 Grant Line Road <br /> Tracy,California <br /> Analytical values are in parts per billion(ppb) <br /> i <br /> DATE Methanol Ethanol TBA by EPA DIM VMR TAW EPA RPA Naphthalene Hexachloroethane Cadmium Chromium Lead Nickeel Zinc <br /> 820 8270 8010 <br /> k <br /> MW-4 <br /> 09/02/97' <1000 <5000 <1000 <20 <20 QO <20 -- -- 65 --11/19/97 -- <500 <100 <2 0 <2 0 <2 0 <2 0 -- - -- <br /> 08/10/98 -- <6250 <1250 <25 <25 <25 <25 -- -- -- -- -- <br /> 02/03/00 <500 <100 <2 0 <2 0 <2 0 <2 0 -- -- - -- <br /> SUMP <br /> 01/07/97 -- -- -- -- -- -- -- <0 5-<5 0 -- - <br /> 11/19/97 - <500 <t00 <20 <2 0 <2 0 <2 0 -- -- <br /> 08/10/98 <br /> 08/10/98 - <500 <100 <2 0 <2 0 <2 0 <2 0 -- - -- - - - <br /> 02/03/00 <500 <100 <2 0 <2 0 <2 0 <2 0 -- - - - - - <br /> EXPLANATIONS <br /> Groundwater laboratory analytical results were compiled from reports prepared by Blaine Tech Services,Inc <br /> TBA=Tertiary butyl ether <br /> MTBE=Methyl tertiary butyl ether <br /> DIPE=Di-isopropyl ether <br /> ETBE=Ethyl tertiary butyl ether <br /> TAME=Tertiary amyl methyl ether <br /> _ <br /> Not Analyzed <br /> EPA 8260 indicates Isopropylbenzene,n-Propylbenzene, t,2,4-Tnmethylbenzene and 1,3,5-Tnmethylbenenzene with respective values <br /> of 42, 100,520 and 93 ppb <br /> F <br /> 9 8632 xls/#386855 9 As of 10/31/00 <br />