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<br /> TABLE 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 DIPE ETBE TAME 1,2-DCA EDB Ethanol Methanol QA/QC
<br /> Number Date Review
<br /> MW-7 06/28/01 <200 <2 <2 <2 <2 <2 <2 <3,000 NA
<br /> 09/14/01 <200 <2 <2 <2 <2 <2 <2 NA NA
<br /> 12/14/01 <5 0 18 <0 50 <0 50 <0 50 <0 50 <0 50 NA NA
<br /> 02/21/02 <5 0 59 <0 50 <0 50 <0 50 <0 50 <0 50 NA NA
<br /> 04/23/02 <5 0 110 <0 50 <0 50 <0 50 <0 50 <0 50 NA NA
<br /> 09/19/02 <5 0 110 <0 50 <0 50 <0 50 <0 50 <0 50 <50 NA
<br /> 12/11/02 <40 98 <10 <10 <10 <10 <10 NA NA
<br /> 01/14/03 <20 13 <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[5] <0 50[5] <0 50 <0 50 <0 50 20 <0 50 <40 NA
<br /> 05/19/03 <20 <0 50 <1 0 <1 0 <10 17 <0 50 <100 NA A
<br /> 09/09/03 <20 <0 50 <1 0 <1 0 <10 20 <0 50 <I00 NA A
<br /> 12/10/03 <20[9,10] <050[9,10] <10[9,10] <10[9,10] <10[9,101 23[9,10] <050[9,10] <100[9,10] NA
<br /> MW-8 06/28/01 <5,000 1,600 <50[41 <50[4] <50[4] <50[4] <50[4] <75,000[41 NA
<br /> 09/14/01 <20,000 7,500 <200 <200 <200 <200 <200 NA NA
<br /> 12/14/01 <500 17,000 <50 <50 <50 <50 <50 NA NA
<br /> 02/21/02 <1,000[31 22,000 <100[3] <100[3] <100[3] <100[3] <100[31 NA NA
<br /> 04/23/02 <5,000[3] 26,000 <500[3] <500[31 <500[31 <500[3] <500[31 NA NA
<br /> 09/19/02 <500 16,000 <50 <50 <50 <50 <50 <5,000 NA
<br /> 12/11/02 <10,000 24,000 <250 <250 <250 <250 <250 NA NA
<br /> 01/14/03 <10,000 18,000 <250 <250 <250 NA NA NA NA
<br /> 02/12/03 <10,000 21,000 <250 <250 <250 NA NA <20,000 NA
<br /> 02/26/03 <20,000[5] 19000[5] <500 <500 <500 <500 <500 <40,000 NA
<br /> 05/19/03 <4,000 33,000 <200 <200 <200 <100 <100 <20,000 NA A
<br /> 09/09/03 <40,000 23,000 <2,000 <2,000 <2,000 <1,000 <1,000 <200,000 NA A
<br /> 12/10/03 <10,000 28,000[7] <500 <500 <500 <250 <250 <50,000 NA 3
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<br /> 5rRAW5
<br /> Arco 5469_Quarterly_Data
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