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TABLE 2 <br /> Fuel Oxygenates Analytical Data <br /> ARCO Service Station No 2130 <br /> 7906 North EI Dorado Street,Stockton,California <br /> Well Sample TBA MtBE DIPS ETRE TAME 1,2-DCA Methanol Ethanol <br /> Number Date pg/L pg/L pg/L pg/L 1911- pg/L pg/L vg/L <br /> Notes <br /> < = Below detection limit for analytical methods used <br /> = Reporting limits raised due to matrix effects and/or other factors <br /> 1,2-DCA = 1,2-Dichloroethane <br /> DIPE = Di-isopropyl ether <br /> EtBE = Ethyl ted-butyl ether <br /> MtBE = Methyt tert-butyl ether <br /> NA = Not analyzed <br /> TAME = Tert-amyl methyl ether <br /> TBA = Tertiary butyl alcohol <br /> pg/L = micrograms per liter <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 concentration of the <br /> analyte in the sample <br /> N The analysis indicates the presence of an analyte for which there is presumptive evidence to make a <br /> "tentative identification" <br /> NJ The analysis indicates the presence of an analyte that has been"tentatively identified"and the associated numerical <br /> value represents its approximate concentration <br /> UJ The analyte was not detected above the reported sample reporting limit However,the reported reporting limit is <br /> approximate and may or may not represent the actual limit of quantitation necessary to accurately and precisely <br /> measure the analyte in the sample <br /> R The sample results are rejected due to identification or other analytical issues <br /> ND Not detected above reported detection limit <br /> �i <br /> 7of7 <br /> K\WprocrosUS SP ARC0 02 MQuanerlyl4 QTR 0312130 GWMR 4Q03 <br />