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TA 2 <br /> GROUNDWATER ANALYTICAL RESULTS <br /> FOR OXYGENATES AND ADDITIONAL COMPOUNDS <br /> ARCO Service Station No. 5469 <br /> 130 South Wilson Way, Stockton,California <br /> USEPA USEPA <br /> Method 8260 Method 8015(M) <br /> Well TBA MTBE RIPE ETBE TAME 1,2-DCA EDB Ethanol Methanol <br /> Number Date ltg/L µg/L µg/L µg/L µg/L m/L µg/L µg/L n/L <br /> MW-1 06/21/00 <200 <2 <2 <2 <2 <2 <2 <3,000 <1[1] <br /> 09/08/00 <200 <2 <2 <2 <2 <2 <2 <3,000 <1 <br /> 12111!00 <200 <2 <2 <2 <2 <2 <2 <3,000 <1 <br /> 03/22/01 <200 2.20 <2 <2 <2 <2 <2 NA NA <br /> 05/24/01 <200 <2 <2 <2 <2 <2 <2 NA NA <br /> 09/14!01 <200 <2 <2 <2 <2 <2 <2 NA NA <br /> 12/14/01 <5.0 1.6 <0.50 <0.50 <0.50 <0.50 <0.50 NA NA <br /> 02/21/02 <5.0 2.8 <0.50 <0.50 <0.50 <0.50 <0.50 NA NA <br /> 04/23/02 <5.0 4.1 <0.50 <0.50 <0.50 <0.50 <0.50 NA NA <br /> 09/19/02 <5.0 7.2 <0.50 <0.50 <0.50 <0.50 <0.50 <50 NA <br /> 12/11/02 <20 7.2 <0.50 <0.50 <0.50 <0.50 <0.50 NA NA <br /> 02/14/03 <20 7.3 <0.50 <0.50 <0.50 NA NA NA NA <br /> 02/12/03 <20 6.6 <0.50 <0.50 <0.50 NA NA <40 NA <br /> 02/26/03 <20 6.7 <0.50 <0.50 <0.50 <0.50 <0.50 <40 NA <br /> MW-2 06/21/00 <200 <2 <2 <2 <2 <2 <2 <3,000 <1 <br /> 09/08/00 <200 <2 <2 <2 <2 <2 <2 <3,000 <1 <br /> 12/11/00 <200 <2 <2 <2 <2 <2 <2 <3,000 <1 <br /> 03/22/01 <200 <2 <2 <2 <2 <2 <2 NA NA <br /> 05/24/01 <200 <2 <2 <2 <2 <2 <2 NA NA <br /> 09/14/01 <200 <2 <2 <2 <2 <2 <2 NA NA <br /> 12/14/01 <5.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NA NA <br /> 02/21/02 <5.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NA NA <br /> 04/23/02 <5.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NA NA <br /> 09/19/02 <5.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <50 NA <br /> 12/11/02 <20 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 NA NA <br /> 01/14/03 <20 <0.50 <0.50 <0.50 <0.50 NA NA NA NA <br /> 02/12/03 <20 <0.50 <0.50 <0.50 <0.50 NA NA <40 NA <br /> 02/26/03 <20 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <40 NA <br /> 5TRA WS <br /> Arco_5469_Quarterly_Data <br /> 1 of 6 <br />