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TAR 2
<br /> GROUNDWATER ANALYTICAL RESULTS
<br /> FOR OXYGENATES AND ADDITIONAL COMPOUNDS
<br /> I
<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
<br /> Number Date µg/L µg/L gg/L gg/L pg/L 1,191L µg/L gg/L 99/1
<br /> MW-5 06/21/00 259 8,370 <2 <2 7.46 <2 <2 <3,000 <1
<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[41 <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 <5.0 <5.0 NA NA
<br /> I
<br /> 02/21/02 <1,000[3] 13,000 <100[3] <100[31 <100[3] <100[3] <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 /> 12/11/02 <1,000 3,800 <25 <25 <25 <25 <25 NA NA
<br /> 01/14/03 <2,000 1,500 <50 <50 <50 NA NA NA NA
<br /> 02/12/03 <20 5.4 <0.50 <0.50 <0.50 NA NA <40 NA
<br /> 02/26/03 <20[51 14[51 <0.50 <0.50 <0.50 <0.50 <0.50 <40 NA
<br /> MW-6 06/21/00 <200 4,120 <2 4.1 4.64 <2 <2 <3,000 <1
<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 <1
<br /> 03/22/01 <200 <2,000[4] <20[4] <20[4] <20[4] <20[4] <20[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 <5.0 17 <5.0 <5.0 NA NA
<br /> 02/21/02 <5,000[3] 45,000 <500[31 <500[3] <500[3] <500[3] <500[3] NA NA
<br /> 04/23/02 <5,000[3] 502000[3] <500[3] <500[3] <500[3] <500[3] <500[3] NA NA
<br /> 09/19/02 590 69,000 <50 <50 110 <50 <50 <5,000 NA
<br /> 12/11/02 <40,000 85,000 <1,000 <1,000 <1,000 <1,000 <1,000 NA NA
<br /> 01/14/03 <40,000 67,000 <1,000 <1,000 <1,000 NA NA NA NA
<br /> 02/12/03 <20,000 42,000 <500 <500 <500 NA NA <40,000 NA
<br /> 02/26/03 <40,000 31,000 <1,000 <1,000 <1,000 4,000 <1,000 <80,000 NA
<br /> STRATUS
<br /> Arco_5469_Q uan erl y_Data
<br /> 3 of 6
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