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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 µgIL ug/L ll9/L 992 lig/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 /> 09/12/01 <200 <2 <2 <2 <2 <br /> 12/12/01 <5 0 <0 50 <0 50 <0 50 <0 50 <br /> 03/13/02 <5 0 <0 50 <0 50 <0 50 <0 50 <br /> 06/18/02 <5 0 <0 50 <0 50 <0 50 <0 50 <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 Well Covered <br /> 06/20/01 <100 <2 <2 <2 <2 <br /> 09/12/01 Well Covered <br /> 12/12/01 Well Covered <br /> 03/13/02 Well Covered <br /> 06/18/02 Well Covered <br /> USEPA=U S Environmental Protection Agency <br /> TBA=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 /> ETBE=Ethyl tertiary butyl ether *Reporting limits raised due to matrix effects and/or other factors <br /> AME=Tertiary amyl methyl ether <br /> µg/L W micrograms per liter <br /> Arco_213o_Quarterly_Data XLS <br /> 4 of 4 <br />