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J � <br /> GeoAnalytical Laboratories, Inc. <br /> 1405 Kansas Avenue Modesto,CA 95351 Phone (209)572-0900 Fax (209) 572-0916 <br /> SReport# N058-03 QC REPORT <br /> Foothill Engineering Dates Analyzed 02/28/02-3/1/02 <br /> 12793 Paddy Creek Lane <br /> Lodi CA 95240 <br /> i <br /> LCS MS % MSD % RPD Blank <br /> Analyte Batch # Method %Recovery Recovery Recovery <br /> Methyl tertiary-Butyl Ether V00110 8260E 104.0 79.2 96.3 19.5 ND <br /> Di-isopropyl ether(DIPS) 114.0 108.0 121.0 11.4 ND <br /> Ethyl tertiary-Butyl Ether (ETBE) 104.0 86.0 104.0 18.9 ND <br /> tertiary-Amyl Methyl Ether 101.0 82.5 96.2 15.3 ND <br /> Comments: -- -- -- - - - - - - - <br /> d <br /> Mario D'OnofrDonna Keller „\\ <br /> Chemist Certification # 1157 Laboratory Director <br />