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i <br /> Table 2 <br /> Fuel Oxygenates Analytical Data <br /> ARCO Service Station No 2130 <br /> 7906 N EL Dorado Street, Stockton, CA <br /> TBA=Tertiary butyl alcohol <br /> MtBE=Methyl tert-butyl ether <br /> DIPE=Di-isopropyl ether <br /> EtBE=Ethyl tent-butyl ether <br /> TAME=Tert-amyl methyl ether <br /> 1,2-DCA=1 2-Dichloroethane <br /> ug/L=micrograms per liter <br /> c=Below detection limit for analytical methods used <br /> --=not measured or analyzed <br /> NA=Not analyzed <br /> 'Reporting limits raised due to matrix effects and/or other factors <br /> Data Qualifier Definitions <br /> U=The analyte was analyzed for,but was not detected above the sample reporting limit <br /> J=The analyte was positively identified,the associated numerical value is the approximate concentrabon of the analyte in the sample <br /> N=The analysis indicates the presence of an analyte for which there is presumptive evidence to make a tentative identification <br /> NJ=The analysis indicates the presence of an analyte that has been tentatively identified and the associated numerical value represents its approximate concentration <br /> UJ=The analyte was not detected above the reported sample reporting limit However,the reported reporting limit is approximate and mayor may not represent the actual limit of quantitation <br /> necessary to accurately and precisely measure the analyte in the sample <br /> R=The sample results are refected due to identification or other analytical issues <br /> ND=Not detected above reported detection limit <br /> Report Date August 4,2004 Page 12 of 12 <br />