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02 *ge 3 of 3 <br /> Fuel Oxygenates Analytical Data <br /> ARCO Service Station No 6020 <br /> 1711 East Yosemite Avenue Manteca,CA <br /> Well Date of TBA MtBE DIPE EtBE TAME 1,2-DCA EDB Ethanol Methanol <br /> Number Sampling g/L) (1rg/L) WL) (Ng/L) (pg/L) (WL)_ (ivg/L) L (1191L) <br /> MW 11 7/28/2003 <20 <0 5 <1 0 <1 0 <1 0 <0 5 <0 5 <100 -- <br /> 11/26/2003 <20 <0 5 <1 0 <1 0 <1 0 <05 — <100 <100 <br /> MW 12 7/28/2003 <20 <0 5 <1 0 <1 0 <1 0 <0 5 <0 5 <100 -- <br /> 11/26/2003 <20 <0 5 <1 0 <1 0 <1 0 <0 5 -- <100 <100 <br /> MW 13D 7/28/2003 <20 78 <1 0 <1 0 <1 0 <0 5 <0 5 <100 -- <br /> 11/26/2003 <20 26 <1 0 <1 0 <1 0 <0 5 — <100 <100 <br /> Notes <br /> < = below given laboratory detection limit <br /> 1 2 DCA = 1,2 Dichloroethane <br /> DIPE = Di-isopropyl ether <br /> EDB = Ethylene dibromide <br /> EIRE = Ethyl tart butyl ether <br /> MtBE = Methyl tort butyl ether <br /> TAME = Tert amyl methyl ether <br /> TBA = Tert butyl alcohol <br /> yWL = 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 numencal value is the approximate concentration 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 <br /> concentration <br /> UJ The analyte was not detected above the reported sample reporting limit However,the reported reporting limit is approximate and may or may not <br /> represent the actual limit of quantitation 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 /> NO Not detected above reported detection limit <br /> K SWprocessV5 BP ARCM60201QuarterlyW OTR 0316020 GWMR 4003 <br />