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Table 2 <br /> Fuel Oxygenates Analytical Data <br /> ARCO Service Station No. 5450 <br /> 1617 W Fremont, Stockton CA <br /> e i-1 <br /> Well Date Ethanol TBA MtBE DIPE EtBE TAME 1,2-DCA EDB PCE Yeftrror <br /> Number Sampled (pglL) (pg1L) (pglL) (pg/L) (pg/L) (pg/L) (pglL) (pg1L) (pg/L) (pg/L) Comments <br /> MW-2 9/11/2002 <40 <20 62 <0,50 <0.50 <0.5 <0.50 <0.50 - - <br /> 11/27/2002 - <20 43 <0.50 <0.50 <0.5 <0.50 <0.50 - - <br /> 03/14/2003 -- <20 28 <0.50 <0.50 <0.50 <0.50 <0.50 -- - <br /> 04/24/2003 <100 <20 30 <1,0 <1.0 <1.0 <0.50 <0.50 - - <br /> 08/14/2003 <100 <20 18 <1.0 <1.0 <1.0 <0.50 <0.50 - -- <br /> 11/06/2003 <500 <100 36 <5.0 <5.0 <5.0 <2.5 <2.5 - -- <br /> 02/26/2004 <100 <20 19 <1.0 <1.0 <1.0 <0.50 <0.50 <br /> MW-3 9/11/2002 <40 <20 0.77 <0.50 <0.50 <0.5 <0.50 <0.50 -- - <br /> 11/27/2002 - <20 <0.50 <0.50 <0.50 <0.5 <0.50 <0.50 -- - <br /> 03/14/2003 - <20 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 -- -- <br /> 04/24/2003 <100 <20 <0.50 <1.0 <1.0 <1.0 <0.50 <0.50 -- - <br /> 08/14/2003 <100 <20 <0.50 <1.0 <1.0 <1.0 <0.50 <0.50 - - <br /> 11/06/2003 <100 <20 <0.50 <1.0 <1.0 <1.0 <0.50 <0.50 - <br /> 02/26/2004 <100 <20 <0.50 <11.0 <1.0 <1.0 <0.50 <0.50 -- ' <br /> MW-4 9/11/2002 <40 <20 <0.50 <0.50 <0.50 <0.5 <0.50 <0.50 - - <br /> 11/27/2002 -- <20 <0.50 <0.50 <0.50 <0.5 <0.50 <0.50 - - <br /> 03/14/2003 - <20 0.69 <0.50 <0.50 <0.50 <0.50 <0.50 - - <br /> 04/24/2003 <100 <20 0.66 <1.0 <1.0 <1.0 <0.50 <0.50 -- -- <br /> 08/14/2003 <100 <20 1.5 <1.0 <1.0 <1.0 <0.50 <0.50 - - <br /> 11/06/2003 <100 <20 j 1.4 <1.0 <1.0 <1.0 <0.50 <0.50 -- - <br /> 0212612004 <100 <20 <0.50 <1.0 <1.0 <111.0 <0.50 <0.50 - - <br /> TBA=Teri-butyl alcohol <br /> MtBE=Methyl tert-butyl ether BIZ Lh y <br /> DIPE=Di-isopropyl ether <br /> EtBE=Ethyl tert-butyl ether <br /> TAME=Tert-amyl methyl ether <br /> 1,2-DCA=1,2-Dichloroethane <br /> EDB=Ethylene dibromide <br /> PCE=Tetrachloroethene <br /> pglL=micrograms per liter <br /> <=below given laboratory detection limit <br /> -=not measured or calculated <br /> Data Qualifier Definitions: <br /> U=The analyte was analyzed for,but was not detected above the sample reporting limit. <br /> ,f=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 /> Report Date:April 16, 2004 Page 1 of 2 <br />