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Groundwater Analytical Rt>�its_Oxygenate Compounds <br /> Chevron Service Station#9-9840 <br /> 4144 Waterloo Road <br /> Stockton,California <br /> WELL ID/ METHANOL ETHANOL TBA MTBE DIPE ETBE TAME <br /> DATE (pp b) ( b) (ppb) kb) (ppb) (ppb) (ppb) <br /> MW-3 <br /> 12/23/98 <1000 <500 <100 <2 0 <2 0 <2 0 <2 0 <br /> 3/19199 <1000 <3000 <200 <2 0 <2 0 <2 0 <2 0 <br /> 6111/99 <1000 <500 <100 <2 0 <2 0 <20 <2 0 <br /> 9120199 <1000 <1000 <200 <2 0 <2 0 <2 0 <2 0 <br /> 1213/99 <1000 <1000 <200 <2 0 <2 0 <2 0 <2 0 <br /> 3/9/00 <1000 <1000 <100 331 <2 0 <2 0 <2 0 <br /> 06/22/00 <1,000 <500 <i00 <2 0 <2 0 <2 0 <2 0 <br /> 12/14/00 <1,0002 <500 <50 <2 0 <2 0 <2 0 <2 0 <br /> 2123/01 <1,000 <500 <50 <20 <2 0 <20 <2 0 <br /> I <br /> EXPLANATIONS <br /> Groundwater laboratory analytical results prior to June 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 /> (ppb)=Parts per billion <br /> i Laboratory report indicates this sample was originally analyzed within holding time Re-analysis for confirmation or dilution was performed past the <br /> recommended holding time <br /> 2 Laboratory report indicates this sample was analyzed outside of EPA recommended hold time <br /> ANALYTICAL METHODS <br /> EPA Method 8260 for Oxygenate Compounds <br /> EPA Method 8015 Modified for Methanol <br /> 9-9840 xis/#386846 4 As of 02/23/01 <br />