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1 rl <br /> 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 Ag/1- 119/L pg/L µg/L µg/1, lig/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 /> 11/9/98 <200 <2 <2 <2 <2 NA <br /> 2/17/99 <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 <2 488 <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 /> 5/17/01 <1,000[2] <10[2] <10[2] <10[21 <10[2] <10[21 <br /> 8/16101 <200 <2 <2 <2 <2 <2 <br /> 12/6101 <50[2) <5 0[2] <5 0[21 <5 0[21 <5 0[2] <5 0[2] <br /> 2/14102 <5 0 <0 50 <0 50 <0 50 <0 50 <0 50 <br /> 6/13/02 <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 /> 11/21/00 <200 <2 <2 <2 <2 218 <br /> 2115/01 <200 <2 <2 <2 <2 3 46 <br /> 5/17/01 <200 <2 <2 <2 <2 264 <br /> 8/16/01 <200 <2 <2 <2 <2 32 <br /> 12/6/01 <5 0 <0 50 <0 50 <0 50 <0 50 36 <br /> 2/14102 <5 0 <0 50 <0 50 <0 50 <0 50 052 <br /> 6113/02 <50 <0 50 <0 50 <0 50 <0 50 23 <br /> MW-813 8/30100 <200 <2 <2 <2 <2 3 80 <br /> 11/21/00 <200 <2 <2 <2 <2 3 82 <br /> 2/15101 <200 <2 <2 <2 <2 436 <br /> 5/17/01 <200 <2 <2 <2 <2 258 <br /> 8116101 <200 <2 <2 <2 <2 <2 <br /> 12/6/01 <5 0 <0 50 <0 50 <0 50 <0 50 28 <br /> 2/14/02 <5 0 1 1 <0 50 <0 50 <0 50 30 <br /> 6/13102 <5 0 <0 50 <0 50 <0 50 <0 50 28 <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 /> 9/16/01 X200 <2 <2 <2 <2 <2 <br /> 12/6/01 <5 0 <0 50 <0 50 <0 50 <0 50 <0 50 <br /> 2/14/02 <5 0 1 3 <0 50 <0 50 <0 50 <0 50 <br /> 6/13102 <50 054 <0 50 <0 50 <0 50 <0 50 <br /> pg1L=Analytical results in micrograms per liter <br /> TBA=Tertiary butyl alcohol [I]This sample was analyzed outside of EPA recommended hold Lime <br /> MTBE=Methyl tertiary butyl ether <br /> DIPE=Di-isopropyl ether [2]The reporting lumt(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 /> 1,2-DCA=12-Dichloroetliane <br /> <—Below detection limit for analytical methods used <br /> Arco-2 i68_Quarterly Data xls 4 of 4 <br />