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<br /> TA01 2
<br /> GROUNDWATER ANALYTICAL RESULTS
<br /> FOR OXYGENATES AND ADDITIONAL COMPOUNDS
<br /> ARCO Service Station No.5469
<br /> 130 South Wilson Way,Stockton,California
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<br /> USEPA USEPA
<br /> Method 8260 Method 8015 M
<br /> Well TBA MTBE DIPE ETBE TAME 1,2-DCA EDB Ethanol Methanol
<br /> Number Date L ITIL L L L L L L L
<br /> MW4 06/21/00 <200 2,290 <2 <2 <2 <2 <2 <3,000 4.81
<br /> 09/08/00 <200 1,220 <2 <2 <2 <2 <2 <3,000 <1
<br /> 12/11/00 <200 3,230 <2 <2 <2 <2 <2 <3,000 <1
<br /> 03/22/01 <200 5,100[2] <2 <2 <2 <2 <2 NA NA
<br /> 05/24/01 <200 5,610 <2 <2 <2 <2 <2 NA NA
<br /> 09/14/01 <2,000[4] 24,000 <20[4] <20[4] <20[4] <20[4] <20[4] NA NA
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<br /> 12/14/01 <250 25,000 <25 <25 <25 <25 <25 NA NA
<br /> 02/21/02 <1,200[3] 29,000 <120[3] <12013] <120[3] <120[3] <120[31 NA NA
<br /> 04/23/02 <5,000[3] 17,000[3] <500[3] <500[3] <500[3] <500[3] <500[3] NA NA
<br /> 09/19/02 <250 17,000 <25 <25 <25 <25 <25 <2,500 NA
<br /> MW-5 06/21/00 259 8,370 <2 <2 7.46 <2 <2 <3,000 <1
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<br /> 09/08/00 357 10,300 <2 <2 10.4 <2 <2 <3,000 1.17
<br /> 12/11/00 245 12,100[2] <2 <2 13.1 <2 <2 <3,000 <1
<br /> 03/22/01 <200 15,600[3] <2[4] <2[4] <2[4] <2[4] <2[4] NA NA
<br /> 05/24/01 <1000[4] 14,400 <10[4] <10[4] <10[4] <10[4] <10[4] NA NA
<br /> 09/14/01 <2,000 16,000 <20 <20 <20 <20 <20 NA NA
<br /> 12/14/01 <50 12,000 <5.0 <5.0 14 <M <5.0 NA NA
<br /> 02/21/02 <1,000[3] 13,000 <100[3] <100[3] <]00[3] <100[31 <100[3] NA NA
<br /> 04/23/02 <5,000[3] 7,600[3] <500[3] <500[3] <500[3] <500[3] <500[3] NA NA
<br /> 09/19/02 <500 4,600 <50 <50 <50 <50 <50 <5,000 NA
<br /> MW-6 06/21/00 <200 4,120 <2 4.1 4.64 <2 <2 <3,000 <I
<br /> 09/08/00 <200 6,690 <2 5.0 8.1 <2 <2 <3,000 1.08
<br /> 12/11/00 <200 7,060[2] <2 3.08 9.28 <2 <2 <3,000 <i
<br /> 03/22/01 <200 <2,000[4] <20[4] <20[4] <20[41 <20[4] QO[4] NA NA
<br /> 05/24/01 241 16,100 <2 4.47 21.1 <2 <2 NA NA
<br /> 09/14/01 <2,000 22,000 <20 <20 22 <20 <20 NA NA
<br /> 12/14/01 <50 14,000 <5.0 <50 17 <5.0 <5.0 NA NA
<br /> 02/21/02 <5,000[3] 45,000 <500[3] <500[3] <500[3] <500[3] <500[3] NA NA
<br /> 04/23/02 <5,000[3] 50,000[3] <500[3] <500[3] <500[3] <500[3] <500[31 NA NA
<br /> 09/19/02 590 69,000 <50 <50 110 <50 <50 <5,000 NA
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<br /> STRATUS
<br /> Arco_5469 QuarW1y_Dara
<br /> 2 of 3
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