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Table 2 <br /> Fuel Oxygenates Analytical Data <br /> ARCO Service Station No 760 <br /> 225 S Cherokee, Lodi CA <br /> Well Date Ethanol TBA MtBE DIP€ EtBE TAME 1,2-DCA EDB ACE Methanol <br /> Number Sampled (4vg1L) (pg1L) (11911L) (rgIL) (pg1L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) Comments <br /> MW-1 10/3/2002 -- <20 091 <0 5 <0 5 <0 5 17 <0 5 — <br /> 01/30/2003 <40 <20 057 <0 50 <0 50 <0 50 10 <0 50 -- -- <br /> 04110l2003 <100 <20 16 <0 50 <0 50 <0 50 94 <0 50 — — <br /> 07/24/2003 <100 <20 076 <1 0 <1 0 <1 0 13 <0 50 - — <br /> 10/17/2003 <100 <20 055 <1 0 <1 0 <1 0 50 <0 50 -- — <br /> 0112112004 <100 <20 <0 50 <1 0 <1 0 <1 0 17 <0 50 — <br /> MW-2 10/3/2002 — <20 37 <0 5 <0 5 <0 5 26 <0 5 -- — <br /> 01/30/2003 <40 UJ <20 UJ <0 50 UJ <0 50 UJ <0 50 UJ <0 50 UJ 1 7 J <0 50 UJ -- -- <br /> 04110l2003 <100 <20 056 <0 50 <0 50 <0 50 076 <0 50 — -- <br /> 07/24/2003 <200 <40 63 <20 <2 0 <2 0 20 <1 0 — — <br /> 10/17/2003 <100 1 <20 30 <1 0 <1 0 <1 0 10 <0 50 -- -- <br /> 01/21/2004 <100 <20 056 <1 0 <1 0 <1 0 19 <0 50 -- -- <br /> MW-3 10/3/2002 -- <20 <0 5 <0 5 <0 5 <0 5 62 <0 5 -- -- <br /> 01/30/2003 <40 <20 <0 50 <0 50 <0 50 <0 50 61 <0 50 — — <br /> 04/10/2003 <100 <20 068 <0 50 <0 50 <0 50 10 <0 50 -- — <br /> 07/24/2003 <100 <20 <0 50 <1 0 <1 0 <1 0 82 <0 50 — — <br /> 10/17/2003 <100 <20 <0 50 <1 0 <1 0 <1 0 19 J <0 50 — — <br /> 0112112004 <100 1 <20 1 <0 50 <1 0 1 <1 0 <1 0 30 <0 50 -- -- <br /> Analysis performed using EPA Method 82608 <br /> TBA=Tert-butyl alcohol <br /> MtBE=Methyl tert-butyl ether <br /> DIPE=Di-isopropyl ether <br /> ELBE=Ethyl tert-butyl ether <br /> TAME=Tert-amyl methyl ether <br /> 1 2-DCA= 1 2-Dichloroethane <br /> EDB=Ethylene dibromide <br /> PCE=Tetra&loroethene <br /> pg/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 lima However,the reported reporting limit is approximate and mayor may not represent the actual limit of quantitation <br /> necessary to accurately and precisely measure the analyte in the sample <br /> Report Date April 28,2004 Page 1 of 2 <br />