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Table la <br /> Groundwater Momtonng Data <br /> Beacon Station No 419 <br /> Stockton,California <br /> Well Date MTBE RIPE ETBE TAME TBA Methanol Ethanol EDC EDB comments <br /> Number ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L <br /> 03/31/98 <5 0 na na na na na na na na no odor/no sheen <br /> 06/10/98 <5 0 na na na na na na na na no odor 1 no sheen <br /> 09/08/98 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 na no no odor 1 no sheen <br /> 12/30/98 <5 0 na na na na na na na na no odor/no sheen <br /> 03/26/99 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 na na no odor/no sheen <br /> 3 06/02J99 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 <0 50 <0 SO no odor/no sheen <br /> N � 08/31/99 <0 SO <0 50 <0 50 <0 50 <5 4 <50 <5 0 <0 50 <0 50 no comment <br /> �'1 12/30/98 <5 0 na na na na na na na na no odor 1 no sheen <br /> 03/26/99 <0 50 <0 50 <0 50 <0 50 23 <50 <5 0 na no no odor/no sheen <br /> 06/02/99 1 1 <0 50 <0 50 <0 50 28 <50 <5 0 270 <0 50 no odor/no sheen <br /> 08/31/99 12 <0 50 <0 50 <0 50 13 <50 <5 0 160 <0 50 no comment <br /> m 12/30/98 <5 0 na na na na na na na na no odor/no sheen <br /> ° € 03/26/99 5 1 <0 50 <0 50 <0 50 <5 0 <50 <10 na na no odor/no sheen <br /> a,w 06/02/99 29 <0 50 <0 50 <0 50 <5 0 <50 <5 0 86 <0 50 no odor 1 no sheen <br /> 08/31/99 16 <0 50 <0 50 <0 50 <5 0 <50 <5 0 54 <0 50 no comment <br /> � 3 12/30/98 <25 0 na na na na na na na na slight odor/no sheen <br /> 03/26/99 <0 50 <0 50 <0 50 <0 50 11 <50 <5 0 na na no odor 1 no sheen <br /> 06/02/99 <0 50 <0 50 <0 50 <0 50 13 <50 <5 0 16 <0 50 no odor/no sheen <br /> 08/31/99 055 <0 50 <0 50 <0 50 93 <50 <5 0 4 <0 50 no comment <br /> AP"Wv 12/30/98 <5 0 na na na na na na na na no odor lno sheen <br /> 03/26/99 <0 50 <0 50 <0 50 <0 50 92 <50 <5 0 na na no odor/no sheen <br /> 06/02/99 <0 50 <0 50 <0 50 <0 50 12 <50 <5 0 94 <0 50 no odor/no sheen <br /> 08/31/99 <0 50 <0 50 <0 50 <0 50 93 <50 <5 0 65 <0 50 no comment <br /> ,V1 x 03/26/99 49 <10 <10 <10 250 1,700 220,000 na na sampled by Doulos Env <br /> LL06/02/99 55 <10 <10 <10 240 4,400 99,000 35 790 sampled by Doulos Env <br /> 08/31/99 ns ns ns ns ns ns ns ns ns no comment <br /> Notes <br /> MTBE=methyl tertiary-butyl ether THA=Tert-Butanol ug/L=micrograms per Litre or parts per billion(ppb) <br /> DIPE=di-isopropyl ether EDC=ethylene dichloride na=not analyzed <br /> ETBE=ethyl tertiary butyl ether EDB=ethylene dibromide ns=not sampled <br /> TAME=tertiary amyl methyl ether <br />