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Ta Z <br /> Groundwater Aytical Results <br /> Former Chevron Service Station##9-9612 <br /> 575 Grant Line Road <br /> Tracy,California <br /> MTBE by EPA EPA <br /> WELL IDI Methanol Ethanol TBA EPA&?fill DIPS ETBE TAS 8270 9010 Naphthalene Hexacliloroethane Cadmium Chromium Lead Nickel Zinc <br /> DATE (ppb) (P b) ) (Pb) ( h') b) (w) ( h) (P b) (P b) (PPh) (PPh) (PPh) ( Ph) (PPb) f(PPb) <br /> Mw-4 <br /> 09102/971 <1,000 <5,000 <1,000 <20 <20 <20 <20 -- 65 - - <br /> 11/19/97 -- <500 <100 <2 0 <20 <20 <20 -- -- -- - - - <br /> 08/10/98 <6,250 <1,250 <25 <25 <25 <25 - -- - - -- <br /> 02/01100 <500 <100 <20 <20 <2 0 <2 0 -- -- <br /> SUMP <br /> 01/07/97 -- -- -- -- -- -- -- -- <0 5-<5 0 <br /> 11/19/97 -- <500 <100 <2 0 <20 <20 <20 - - - -- - -- <br /> 08/10/98 -- <500 <100 <2 0 <20 <20 <20 - -- - -- -- - <br /> 02/01/00 -- <500 <100 <2 0 <20 <20 <20 -- -- - <br /> EXPLANATIONS <br /> Groundwater laboratory analytical results prior to May 25,2001,were compiled from reports prepared by Blaine Tech Services Inc <br /> TBA=Tertiary butyl ether TAME=Tertiary amyl methyl ether <br /> MTBE=Methyl tertiary butyl ether (ppb)=Parts per billion <br /> DiPE=Di-isopropyl ether - =Not Analyzed <br /> ETBE=Ethyl tertiary butyl ether <br /> I EPA 8260 indicates Isopropylbenzene,n-Propylbenzene, 1,24-Trimethylbenzene and 1,3,5-Tnmethylhenen7ene with respective valnes <br /> of 42, 100,520 and 93 ppb <br /> 2 Laboratory report indicates sample was analyzed outside the EPA recommended holding time <br /> 9 8612 x151#186855 9 Ac of 07/11lni <br />