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Table 2 <br /> 4of4 <br /> Fuel Oxygenates/Additives Analytical Data <br /> Former ARCO Station No 4493 <br /> 205 North Center Street,Stockton,California <br /> Well Date TBA MtBE DIPE EtBE TAME 1,2-DCA EDB Ethanol <br /> Number Sampled <br /> MW-10M 6/12/2002 <5 0 58 <0 5 <0 5 <0 5 <0 5 <0 5 <br /> 9/16/2002 <40 26 <1 0 <1 0 <1 0 <1 0 <1 0 -- <br /> 12/5/2002 <40 <10 <10 <10 <10 <10 <10 <80 <br /> 3/14/2003 <20 <0 5 <0 5 <0 5 <0 5 <0 5 <0 5 <100 <br /> 6!912003 <20 <10 <10 <10 <10 <10 <10 <100 <br /> 9/25/2003 <20 <10 <10 <10 <10 <10 <10 <100 <br /> 12/2312003 <20 <10 <10 <10 <10 <10 <10 <100 <br /> MW-10D 6/12/2002 <5 0 31 <0 5 <0 5 <0 5 <0 5 <0 5 <br /> 9/16/2002 <20 16 <0 5 <0 5 <0 5 <0 5 <0 5 - <br /> 12/5/2002 <20 10 <0 5 <0 5 <0 5 <0 5 <0 5 <40 <br /> 3/14/2003 <20 064 <0 5 <0 5 <0 5 <0 5 <0 5 <100 <br /> 6/9/2003 <20 <10 <10 <10 <10 <10 <10 <100 <br /> 9/25/2003 <20 <10 <10 <10 <10 <10 <10 <100 <br /> 12/23/2003 <20 <10 <10 <10 <10 <10 <10 <100 <br /> MW-11M 12/5/2002 <40 55 <10 <10 <10 <10 <10 <80 <br /> 3114/2003 <40 110 <10 <10 <10 <10 <10 <200 <br /> 6/9/2003 <100 130 <5 0 <5 0 <5 0 <5 0 <5 0 <500 <br /> 9/25/2003 <100 150 <5 0 <5 0 <5 0 <5 0 <5 0 <500 <br /> 12(23/2003 <20 100 <10 <10 <10 <10 <10 <100 <br /> MW-11D 12/5/2002 <20 22 <0 5 <0 5 <0 5 <0 5 <0 5 <40 <br /> 3/14/2003 <20 35 <0 5 <0 5 <0 5 <0 5 <0 5 <100 <br /> 6/9/2003 <20 13 <10 <10 <10 <10 <10 <100 <br /> 9/25/2003 <20 <10 <10 <10 <10 <10 <10 <100 <br /> 12/23/2003 <20 19 <10 <10 <10 <10 <10 <100 <br /> MW-12D 12/23/2003 <20 22 <1 0 <1 0 <1 0 <1 0 <1 0 <100 <br /> Notes <br /> < = below given laboratory detection limit EtBE = Ethyl tert butyl ether <br /> = not measured or analyzed MtBE = Methyl tert butyl ether <br /> 1,2-DCA = 1,2-Dichloroethane TAME = Tert amyl methyl ether <br /> DIPE = Di-isopropyl ether TBA = Tert butyl alcohol <br /> EDB = Ethylene dibromide pg/t- = 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 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 appro)amate <br /> concentration <br /> UJ The analyte was not detected above the reported sample reporting limit However,the reported reporting limit is apprmamate 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 rejected due to serious deficiencies in the abdity to analyze the sample (i e,the presence or absence of the analyte cannot be <br /> verified)or the analyte identification has been rejected(i e,the presence of the analyte cannot be verified) <br /> K MprocessUS BP FAC0144931We11 Insta11\4493 QWW 4QO3 <br />