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American. Environmental Network <br /> PAGE 3 <br /> GEOSTRATEGIES, INC. <br /> SAMPLE ID: MW-4 DATE SAMPLED: 12/18/97 <br /> AEN LAB NO: 9712296-02 DATE RECEIVED: 12/18/97 <br /> AEN WORK ORDER: 9712296 REPORT DATE: 01/02/98 <br /> CLIENT PROD. ID: 8146 <br /> METHOD/ REPORTING DATE <br /> ANALYTE CAS# RESULT LIMIT UNITS ANALYZED <br /> BTEX & Gasoline HCs EPA 8020 <br /> Benzene 71-43-2 ND 0.5 ug/L 12/27/97 <br /> Toluene 108-88-3 ND 0.5 ug/L 12/27/91 <br /> Ethylbenzene 100-41-4 0.6 * 0.5 ug/L 12/27/97 <br /> Xylenes , Total 1330-20-7 ND 2 ug/L 12/27/97 <br /> Purgeable HCs as Gasoline 5030/GCEID ND 0. 05 mg/L 12/27/97 <br /> Methyl t-Butyl Ether 1634-04-4 ND 5 ug/L 12/27/97 <br /> Gasoline Oxygenates EPA 8260 <br /> t-Butanol (TBA) 75-65-0 ND 100 ug/L 12/30/97 <br /> Methy-t-butyl ether (MTBE) 1634-04-4 ND 5 ug/L 12/30/97 <br /> Di -isopropyl ether (DIPE) 108-20-3 ND 5 ug/L 12/30/97 <br /> _= Ethyl -t-butyl ether (ETBE) 637-92-3 ND 5 ug/L 12/30/97 <br /> t-Amylmethyl ether (TAME) 994-05-8 ND 5 ug/L 12/30/97 <br /> ND = Not detected at or above the reporting limit <br /> * = Value at or above reporting limit <br />