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TABLE 2 <br /> GROUNDWATER ANALYTICAL RESULTS FOR OXYGENATES <br /> ARCO Service Station No 2130 <br /> 7906 North El Dorado Street, Stockton,California <br /> Well Sample TBA MTBE DIPE ETBE TAME <br /> Number Date µg/L }sg/L µg/L µg/L Pg/L <br /> MW-7 11/19/97 NA NA NA NA NA <br /> 03/05/98 <100 <2 <2 <2 <2 <br /> 06/26/98 <100 <2 <2 <2 <2 <br /> 09/01/98 <100 <2 <2 <2 <2 <br /> 12/02/98 <200 <2 <2 <2 <2 <br /> 03/31/99 <200 <2 <2 <2 <2 <br /> 06/04/99 <200 <2 <2 <2 <2 <br /> 09/02/99 <200 <2 <2 <2 <2 <br /> 11/29/99 <200 <2 <2 <2 <2 <br /> 03/16/00 <200 <2 <2 <2 <2 <br /> 06/26/00 <100 <2 <2 <2 <2 <br /> 09/28/00 <200 <2 <2 <2 <2 <br /> 12/19/00 <200 <2 <2 <2 <2 <br /> 03/15/01 <200 <2 <2 <2 <2 <br /> 06/20/01 <100 <2 <2 <2 <2 <br /> MW-10 11/19/97 NA NA NA NA NA <br /> 03/05/98 <250* <5* <5* <5* <5* <br /> . 06/26/98 <100 <2 <2 <2 <2 <br /> 09/01/98 <100 <2 <2 <2 <2 <br /> 12/02/98 <200 <2 <2 <2 <2 <br /> 03/31/99 <200 <2 <2 <2 <2 <br /> 06/04/99 <200 <2 <2 <2 <2 <br /> 09/02/99 <200 <2 <2 <2 <2 <br /> 11/29/99 <200 <2 <2 <2 <2 <br /> 03/16/00 <200 <2 <2 <2 <2 <br /> 06/26/00 <100 <2 <2 <2 <2 <br /> 09/28/00 <200 <2 <2 <2 <2 <br /> 12/19/00 <200 <2 <2 <2 <2 <br /> 03/15/01 <200 <2 <2 <2 <2 <br /> 06/20/01 <100 <2 <2 <2 <2 <br /> USEPA=U S Environmental Protection Agency <br /> A=Tertiary butyl alcohol <br /> MTBE=Methyl tertiary butyl ether <=Below detection limit for analytical methods used <br /> DIPE=Di-isopropyl ether NA=Not analyzed <br /> TBE=Hthyl tertiary butyl ether *Reporting limits raised due to matrix effects and/or other factors <br /> AME=Tertiary amyl methyl ether <br /> µg/L=micrograms per later <br /> • <br /> C 1ARC012130\QTRLY120001Arco 2130 Quarterly Data XLS Delta <br /> 3 of 3 8/24/01 <br />