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American Environmental Network <br /> PAGE 5 <br /> ATC ASSOCIATES <br />' SAMPLE ID RUSD-SB6-W DATE SAMPLED 04/23/98 <br /> AEN LAB NO 9804259-04 DATE RECEIVED 04/27/98 <br /> AEN WORK ORDER 9804259 REPORT DATE 05/19/98 <br /> CLIENT PROJ ID 13099 0001 <br />' METHOD/ REPORTING DATE <br /> ANALYTE CAS# RESULT LIMIT UNITS ANALYZED <br /> 1 <br /> #Sample Filtration 0 45 um - Filtr Date 04/27/98 <br /> BTEX & Gasoline HCs EPA 8020 <br /> Benzene 71-43-2 ND 10 ug/L 05/06/98 <br /> Toluene 108-88-3 ND 10 ug/L 05/06/98 <br />' Ethylbenzene 100-41-4 1 ,300 * 10 ug/L 05/06/98 <br /> Xylenes, Total 1330-20-7 8,700 * 40 ug/L 05/06/98 <br /> Purgeable HCs as Gasoline 5030/GCFID 92 * 1 mg/L 05/06/98 <br /> i #Digestion, Metals by ICP EPA 3010 - Prep Date 05/04/98 <br /> Lead EPA 6010 ND 0 04 mg/L 05/05/98 <br /> Gasoline Oxygenates 8260 EPA 8260 <br /> t-Butanol (TBA) 75-65-0 ND 2000 ug/L 05/07/98 <br /> Methy-t-butyl ether (MTBE) 1634-04-4 ND 100 ug/L 05/07/98 <br /> Di -isopropyl ether (DIPE) 108-20-3 ND 100 ug/L 05/07/98 <br /> Ethyl -t-butyl ether (ETBE) 637-92-3 ND 100 ug/L 05/07/98 <br /> t-Amylmethyl ether (TAME) 994-05-8 ND 100 ug/L 05/07/98 <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 /> 1 <br />