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TABLE 2 <br /> GROUNDWATER ANALYTICAL RESULTS FOR OXYGENATES <br /> AND ADDITIONAL COMPOUNDS(U S EPA METHOD 8260) <br /> Former ARCO Service Station No 2168 <br /> 441 Charter Way <br /> Stockton,California <br /> Well <br /> Sample TBA MTBE DIPE ETBE TAME 1,2-DCA <br /> Number Date pg/L pg/L pg/L pg/L pg/L pg/L <br /> MW-7 11/17/97 NA NA NA NA NA NA <br /> 5/22/98 <10,000 <100 <100 <100 <100 NA <br /> 8/12/98 <200 <2 <2 <2 <2 NA <br /> 11/9198 <200 <2 <2 <2 <2 NA <br /> 2117199 <200 <2 <2 <2 <2 NA <br /> 5/25/99 <200 <2 <2 <2 <2 NA <br /> 8/18/99 <200 <2 <2 <2 <2 NA <br /> 12/17/99 <200 <2 <2 <2 <2 NA <br /> 2/22/00 <200 <2 <2 <2 <2 NA <br /> 6/22/00 <200 <2 4 98 <2 <2 NA <br /> 8/30/00 <200 <2 <2 <2 <2 <2 <br /> 11/21/00 <200 <2 <2 <2 <2 <2 <br /> 2/15/01 <200 <2 <2 <2 <2 <2 <br /> 5/17101 <1,000[2] <10[2] <10[2] <10[2] <10[2] <10[2] <br /> 8116101 <200 <2 <2 <2 <2 <2 <br /> 12/6/01 <50[2] <5 0[2] <5 0[21 <5 0[2] <5 0[2] <5 0[2] <br /> 2/14/02 <5 0 <0 50 <0 50 <0 50 <0 50 <0 50 <br /> MW-8 8/30/00 <200 <2 <2 <2 <2 338 <br /> 11121/00 <200 <2 <2 <2 <2 2 18 <br /> 2/15/01 <200 <2 <2 <2 <2 346 <br /> 5/17/01 <200 <2 <2 <2 <2 264 <br /> 8/16/01 <200 <2 <2 <2 <2 32 <br /> 12/6/01 <50 <0 50 <0 50 <0 50 <0 50 3 6 <br /> 2/14/02 <50 <0 50 <0 50 <0 50 <0 50 052 <br /> MW-8B 8/30/00 <200 <2 <2 <2 <2 3 80 <br /> 11/21/00 <200 <2 <2 <2 <2 3 82 <br /> 2/15/01 <200 <2 <2 <2 <2 436 <br /> 5/17/01 <200 <2 <2 <2 <2 258 <br /> 8/16101 <200 <2 <2 <2 <2 <2 <br /> 1216/01 <5 0 <0 50 <0 50 <0 50 <0 50 28 <br /> 2/14102 <5 0 1 1 <0 50 <0 50 <0 50 30 <br /> MW-8C 8/30/00 <200 <2 <2 <2 <2 <2 <br /> 11/21/00 <200 <2 <2 <2 <2 <2 <br /> 2/15/01 <200 <2 <2 <2 <2 <2 <br /> 5/17/01 <200 <2 <2 <2 <2 <2 <br /> 8/16/01 <200 <2 <2 <2 <2 <2 <br /> 12/6/01 <5 0 <0 50 <0 50 <0 50 <0 50 <0 50 <br /> 2114/02 <5 0 1 3 <0 50 <0 50 <0 50 <0 50 <br /> pg/L=Analytical results in micrograms per liter <br /> TBA=Tertiary butyl alcohol [1]This sample was analyzed outside of EPA recommended hold time <br /> MTBE=Methyl tertiary butyl ether <br /> D1PE=Di-isopropyl ether [2]The reporting limu(s)for this sample have been raised due to <br /> ETBE=Ethyl tertiary butyl ether high levels of non-target mterferents <br /> TAME-Tertiary amyl methyl ether <br /> 0 1,2 DCA=1,2-Dichloroethane <br /> <=Below detection limit for analytical methods used <br /> Arc0_216R_Quaiter1y_Data xls 4 of4 Dclta <br />