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I l <br /> Table 2 <br /> Fuel Oxygenates Analytical Data <br /> ARCO Service Station #760 <br /> 225 S Cherokee, Lodi CA <br /> Well Date Ethanol TBA MtBE DIPE EtBE TAME 1,2-DCA EDB <br /> Number Sampled (1911-) (pglL) (pglL) (pg1L) (pglL) (pg/L) U1911L) (pg/L) Comments <br /> MW-1 10/3/2002 -- <20 091 <0 5 <0 5 <0 5 17 <0 5 <br /> 1/30/2003 <40 <20 057 <0 50 <0 50 <0 50 10 <0 50 <br /> 4/10/2003 <100 <20 16 <0 50 <0 50 <0 50 94 <0 50 <br /> 7/24/2003 <100 <20 076 <1 0 <1 0 <1 0 13 <0 50 <br /> 10/17/2003 <100 <20 055 <1 0 <1 0 1 <1 0 so <0 50 <br /> MW-2 10/3/2002 - <20 37 <0 5 <0 5 <0 5 26 <0 5 <br /> 1/30/2003 <40 <20 <0 50 <0 50 <0 50 <0 50 17 <0 50 <br /> 4/10/2003 <100 <20 056 <0 50 <0 50 <0 50 076 <0 50 <br /> 7/24/2003 <200 <40 63 <2 0 <2 0 <2 0 20 <1 0 <br /> 10/17/2003 <100 <20 30 <1 0 <1 0 <1 0 10 <0 50 <br /> MW-3 10/3/2002 <20 <0 5 <0 5 <05 <0 5 62 <0 5 <br /> 1/30/2003 <40 <20 <0 50 <0 50 <0 50 <0 50 61 <0 50 <br /> 4/10/2003 <100 <20 068 <0 50 <0 50 <0 50 10 <0 50 <br /> 7/24/2003 <100 <20 <0 50 <1 0 <1 0 <1 0 82 <0 50 <br /> 10117/2003 <100 <20 <0 50 <1 0 <1 0 <1 0 1 9 J <0 50 <br /> Analysis performed using EPA Method 82608 <br /> TBA=Tert-butyl alcohol <br /> MtBE=Methyl tert butyl ether <br /> RIPE=Di-isopropyl ether <br /> EtBE=Ethyl tort butyl ether <br /> TAME=Tert-amyl methyl ether <br /> 1,2-DCA= 1,2-Dichloroethane <br /> EDB=Ethylene dibromide <br /> ,vg/L=micrograms per liter <br /> <=below given laboratory detection limit <br /> --=not measured or analyzed <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 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 <br /> quantitation necessary to accurately and precisely measure the analyte in the sample <br /> R=The sample results are rejected due to serious deficiencies in the ability to analyze the sample (i e,the presence or absence of the analyte cannot be verified)or the analyte <br /> identification has been rejected(i e,the presence of the analyte cannot be verified) <br /> ND=Not detected above reported detection limit <br /> Report Date December 5,2003 Page 1 of 1 <br />