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TABLE 4 <br /> GROUNDWATER ANALYTICAL RESULTS <br /> FOR OXYGENATES AND ADDITIONAL COMPOUNDS <br /> 25775 Patterson Pass Road <br /> Tracy,California <br /> Nitrate <br /> Sample Date MTBE TBA TAME DIPE ETBE Ethanol 1,2-DCA EDS as NO3 <br /> ID Collected (µ !L) ( ) ( /L) ( ) ( ) ( ) ( /L) ( L) (m ) <br /> DW 02/07/01 <2 00 <200 <2 00 <2 00 <2 00 NA NA NA 16 <br /> 09/05/01 <2 0 <200 <2 0 <2 0 <2 0 NA NA NA 15 <br /> 11/12/01 <10 <100 <10 <10 <10 NA NA NA 17 <br /> 03/26/02 <0 50 <5 0 <0 50 <0 50 <0 50 NA NA NA 17 <br /> 06/21/02 <0 50 <5 0 <0 50 <0 50 <0 50 NA NA NA NA <br /> 09/18/02 <0 50 <5 0 <0 50 <0 50 <0 50 NA NA NA NA <br /> 12/23/02 <0 50 <5 0 <0 50 <0 50 <0 50 NA NA NA NA <br /> 03/24/03 <0 50 <20 <0 50 <0 50 <0 50 <100 NA NA NA <br /> 06/16/03 <0 50 A <20 A <1 0 A <1 0 A <10 A <100 A NA NA NA <br /> 09/19/03 <0 50 A <20 A <1 0 A <1 0 A <10 A <100 A <0 50 A <0 50 A NA <br /> 12/23/03 <0 50 A <20 A <1 0 A <1 0 A <10 A <100 A <0 50 A <0 50 A NA <br /> 03/16/04 <0 50 A <20 A <1 0 A <1 0 A <1 0 A <100 A <0 50 A <0 50 A NA <br /> NOTES <br /> TSA=Ternary butyl alcohol ug/L=micrograms per liter QA/QC Review <br /> AME=I ertiary amyl methyl ether mg/L=milligrams per liter A=Data accepted without qualification <br /> DiPE=Di-isopropyl ether NA=not analyzed J=Data accepted with qualification <br /> ETBE=Ethyl tertiary butyl ether DW=Domestic Well R=Data rejected <br /> 12-DCA= 1,2-Dichloroethane <br /> EDB= 1,2-Dibromoethane <br /> [1]=The sample was diluted due to the presence of high levels of non-target analytes resulting in elevated reporting limits <br /> [21=Result may be bused low Matrix spike and matrix spike duplicate recoveries were below control limits,and the corresponding RPD was outside of control limits <br /> Arco 6100 Quarterly_Data Page 3 of 3 <br /> srwgnJ5 1 <br />