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TABLE 4 <br /> ANALYTICAL RESULTS OF GROUND WATER SAMPLES - EPA METHOD 8260 <br /> Former Chase Chevrolet - Van Buren Facility <br /> 424 North Van Buren Street, Stockton, California <br /> (µg/1) <br /> Well I D Sample Date DIPE ETBE MTBE TAME TBA Methanol Ethanol <br /> MW-17 08-06-97 <1 <1 <5 <l <5 NA NA <br /> 11-05-97 <1 <1 <5 <1 <5 NA NA <br /> 02-05-98 <1 <1 <5 <1 <5 NA NA <br /> 05-08-98 <1 <1 <5 <1 <5 NA NA <br /> 08-13-98 <1 <1 <1 <1 <5 NA NA <br /> 11-04-98 <1 <1 <1 <1 <5 NA NA <br /> 02-03-99 <1 <1 <1 <1 <5 NA NA <br /> 05-05-99 <1 <1 <1 <1 <5 NA NA <br /> 08-10-99 <1 <1 <1 <1 <5 NA NA <br /> 11-10-99 <1 <I <1 <I <5 NA NA <br /> 02-09-00 <1 <1 <1 <1 <5 NA NA <br /> 05-11-00 <1 <1 <1 <1 <5 NA NA <br /> 08-22-00 <1 <1 <1 <1 <5 NA NA <br /> 11-28-00 <1 <1 <1 <1 <5 <250 <50 <br /> 02-28-01 NA NA NA NA NA NA NA <br /> 05-21-01 <1 0 <1 0 <1 0 <1 0 <5 0 <250 <50 <br /> 08-16-01 <1 0 <1 0 <1 0 <1 0 <5 0 <250 <50 <br /> 11-14-01 <1 0 <1 0 <1 0 <1 0 <5 0 <500 <50 <br /> 02-13-02 <1 0 <10 <1 0 <1 0 <5 0 NA NA <br /> 05-16-02 NA NA NA NA NA NA NA <br /> 09-30-02 NS NS NS NS NS NS NS <br /> 12-02-02 NS NS NS NS NS NS NS <br /> 02-21-03 NS NS NS NS NS NS NS <br /> <0 5 1 <0 5 1 <0 5 1 < <5 0 A I NA <br /> Notes Samples collected on 8-6-97 analyzed by EPA Method 8240 <br /> go micrograms per liter NA sample not analyzed for specified analyte <br /> DIPE DE-isopropyl ether NS well was not sampled <br /> ETBE Ethyl tent butyl ether <br /> MTBE Methyi tertiary butyl ether <br /> TAME tent amyl methyi ether <br /> TBA tertiary-butyl alcohol <br /> Advanced GeoEnwronmental,Inc <br />