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Table 1a <br /> Groundwater Monitoring Data <br /> Beacon Station No.419 <br /> Stockton,California <br /> Well Date MTBE DIPE ETBE TAME Tert-B Methanol Ethanol comments <br /> Number u ugIL u L ugIL ugfL u u <br /> MW-7 12/30/98 <5 0 na na na na na na sampled by Doulos Env <br /> 03/26/99 <0 50 <0 50 <0 50 <0 50 23 <50 <5 0 sampled by Doulos Env <br /> MW-8 12/30/98 <5 0 na na na na na na sampled by Doulos Env <br /> 03/26/99 5 1 <0 50 <0 50 <0 50 <5 0 <50 <10 sampled by Doulos Env <br /> MW-9 12/30/98 <25 0 na na na na na na sampled by Doulos Env <br /> 03/26/99 <0 50 <0 50 <0 50 <0 50 11 <50 <5 0 sampled by Doulos Env <br /> MW-10 12/30/98 <5 0 na na na na na na sampled by Doulos Env <br /> 03/26/99 <0 50 <0 50 <0 50 <0 50 92 <50 <5 0 sampled by Doulos Env <br /> VW-1 03/26/99 49 <10 <10 <10 250 1,700 220,000 sampled by Doulos Env <br /> MTBE=methyl tertiary-butyl ether TAME=tertiary amyl methyl ether <br /> D1PE=di-isopropyl ether Text-B =Tert-Butanol <br /> ETBE=ethyl tertiary butyl ether <=less than the indicated defection level <br />