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s • • <br /> TABLE 4 <br /> GROUNDWATER ANALYTICAL RESULTS <br /> FOR OXYGENATES AND ADDITIONAL COMPOUNDS <br /> ARCO Service Station No 6100 <br /> 25775 Patterson Pass Road <br /> Tracy, California <br /> Nitrate <br /> Sample Date MTBE TBA TAME DIPE ETBE Ethanol 1,2-DCA EDB as NO3 <br /> 1D Collected ( ) ( ) ( ) ( IL) ( IL) ( IL) ( IL) (R04 (m ) <br /> VW-6 02/08/01 160 <200 <2 00 <2 00 <2 00 NA NA NA <10 <br /> 11/06/01 230 <20,000 <200 <200 <200 NA NA NA NA <br /> 03/26/02 270 <50[l] <5 0[1] <5 0[1] <5 0[1] NA NA NA NA <br /> 06/21/02 330 170 <5 0 <5 0 <5 0 NA NA NA NA <br /> 09/18/02 300 270 <25 <25 <25 NA NA NA NA <br /> 12/23/02 310 <100 <10 <10 <10 NA NA NA NA <br /> 03/24/03 2,800 <20,000 <500 <500 <500 <100,000 NA NA NA <br /> 06/16/03 170 A <4,000[1,2] J <200[l] J <200[1] J <200[l] J <20,000[1] J NA NA NA <br /> 09/19/03 <250 A <10,000 A <500 A <500 A <500 A <50,000 A <250 A <250 A NA <br /> 03/16/04 170 A <4,000 A <200 A <200 A <200 A <20,000 A <100 A <100 A NA <br /> VW-20 06/16/03 <250[l] J <10,000[1] J <500[l] J <500[l] J <500[l] J <50,000[1] J NA NA NA <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 /> 11/12/0I <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 <1 0 A <100 A NA NA NA <br /> 09/19/03 <0 50 A <20 A <1 0 A <1 0 A <1 0 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 <1 0 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 /> 06/22/04 <0 50 A <20 A <1 0 A <1 0 A <1 0 A <100 A <0 50 A <0 50 A NA <br /> Arce_6100_Quarterly_Data Page 3 of 4 STRATUa <br />