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Ta <br /> Groundwater Analytical R -Oxygenate Compounds <br /> Tosca(Unocal)Service Station#5886 <br /> 2701 West March Lane <br /> Stockton,California <br /> EXPLANATIONS <br /> Groundwater laboratory analytical data prior to March 25 1998,were compiled from reports prepared by MPDS Services,Inc <br /> TBA=Tertiary butyl alcohol <br /> MTBE=Methyl tertiary butyl ether <br /> DI PE=Di-isopropyl ether <br /> ETBE=Ethyl tertiary butyl ether <br /> TAME=Tertiary amyl methyl ether <br /> 1,2-DCA= 1,2-Dichloroethane <br /> EDB=Ethylene dibromide <br /> (ppb)=Parts per billion <br /> --=Not Analyzed <br /> ND = Not Detected <br /> I Detection limit raised Refer to analytical reports <br /> 2 Methanol by EPA Method 8015 Modified was ND <br /> 3 Laboratory report indicates sample required reanalysis past hold time due to Failing internal standard on first run First analysis was within hold time <br /> Laboratory report indicates sample was originally analyzed within holding time Re-analysis for confirmation or dilution was performed past the recommended holding time <br /> 5 Laboratory report indicates sample was analyzed outside the EPA recommended holding time <br /> ANALYTICAL METHOD <br /> EPA Method 8260 for Oxygenate Compounds <br /> i <br /> 5886 xlsl#180137 29 As of 11/20/01 <br />