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i • • <br /> TABLE 4 <br /> GROUNDWATER ANALYTICAL RESULTS <br /> FOR OXYGENATES AND ADDITIONAL COMPOUNDS <br /> Former ARCO 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 NO} <br /> ID Collected (1191L) ( } ( /L) (w!) ( } ( L) ( /L) OWL) (m ) <br /> VW-3 02/08/01 1,000 387 570 <2 00 <2 00 NA NA NA <1 0 <br /> 03/26/02 490 <100[1] <10[1] <10[11 <10[1] NA NA NA NA <br /> 03/16/04 180 A <2,000 A <100 A <100 A <100 A <10,000 A <50 A <50 A NA <br /> 06/22/04 970 A <20,000 A <1,000 A <1,000 A <1,000 A <100,000 A <500 A <500 A NA <br /> 09/07/04 360 A <4,000 A <200 A <200 A <200 A <20,000 A <210 A <100 A NA <br /> 12/21/04 170 A <2,000 A <100 A <100 A <100 A <10,000 A <50 A <50 A NA <br /> 03/15/05 <50 A <2,000 A <100 A <100 A <100 A <10,000 A <50 A <50 A NA <br /> 06/21/05 180[6] J <1,000 A <25 A <25 A <25 A <5,000 A �100 A (371 A NA <br /> 09/19/05 120 A <2,000 A <50 A <50 A <50 A <10,000 A <50 A <50 A NA <br /> 12/19/05 180 A <2,000 A <50 A <50 A <50 A <10,000[8] J <50 A <50 A NA <br /> 03/28/06 <50 A <2,000 A <50 A <50 A <50 A <30,000 A <50 A <50 A NA <br /> VW4 02/08/01 1,890 <20,000 <200 <200 <200 NA NA NA <10 <br /> 09/18/02 1,200 <2,500 <250 <250 <250 NA NA NA NA <br /> 06/22/04 <250 A <10,000 A <500 A <500 A <500 A <50,000 A0 A <250 A NA <br /> 06/21/05 <500 A <20,000 A <500 A <500 A <500 A <100,000 A �70 A <500 A NA <br /> Arco_6100_Quarterly_Data Page 5 of 9 5MRAM5 <br />