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Aiiiei r(at1 Etri ti otitiiewcil Nem o» k <br /> PAGE 4 <br /> WESTERN GEO-ENGINEERING <br /> SAMPLE ID MW-3 DATE SAMPLED 03/10/98 <br /> AEN LAB NO 9803132-03 DATE RECEIVED 03/12/98 <br /> AEN WORK ORDER 9803132 REPORT DATE- 03/31/98 <br /> CLIENT PROJ ID ARC WELDING <br /> METHOD/ REPORTING DATE <br /> ANALYTE CAS# RESULT LIMIT UNITS ANALYZED <br /> BTEX & Gasoline HCs EPA 8020 <br /> Benzene 71-43-2 1 ,200 * 5 ug/L 03/24/98 <br /> Toluene 108-88-3 62 * 5 ug/L 03/24/98 <br /> Ethylbenzene 100-41-4 170 * 5 ug/L 03/24/98 <br /> Xylenes Total 1330-20-7 400 * 20 ug/L 03/24/98 <br /> Purgeable HCs as Gasoline 5030/GCFID 3 3 * 0 5 mg/L 03/24/98 <br /> Methyl t-Butyl Ether 1634-04-4 ND 50 ug/L 03/24/98 <br /> Gasoline Oxygenates EPA 8260 <br /> t-Butanol (TBA) 75-65-0 ND 100 ug/L 03/24/98 <br /> Methy-t-butyl ether (MTBE) 1634-04-4 7 * 5 ug/L 03/24/98 <br /> Di -isopropyl ether (DIPS) 108-20-3 ND 5 ug/L 03/24/98 <br /> Ethyl -t-butyl ether (ETBE) 637-92-3 ND 5 ug/L 03/24/98 <br /> t-Amylmethyl ether (TAME) 994-05-8 ND 5 ug/L 03/24/98 <br /> Reporting limits for gas/BTEX elevated due to high <br /> levels of target compounds Sample run at dilution <br /> ND = Not detected at or above the reporting limit <br /> * = Value at or above reporting limit <br />