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GeoAnalytical Laboratories, Inc. <br />1405 Kansas Avenue Modesto, CA 95351 Phone (209) 572-0900 Fax (209) 572-0916 <br />port# P365-08 QC REPORT <br />Foothill Engineering Dates Analyzed 01/02/2004 <br />12793 Paddy Creek Lane <br />Lodi CA 95240 <br />Analyte Batch # Method <br />Methyl tertiary -Butyl Ether PV00521 8260E <br />Di -isopropyl Ether (DIPS) <br />Benzene <br />1,2-Dichloroethane (1,2 -DCA) <br />tertiary -Amyl Methyl Ether <br />Toluene <br />L J <br />Comments: <br />Marto D OnofrtoK <br />Chemist <br />LCS <br />MS % <br />MSD % <br />%Recovery <br />Recovery <br />Recovery <br />128.0 <br />96.6 <br />104.0 <br />87.4 <br />84.7 <br />80.3 <br />75.0 <br />81.0 <br />77.5 <br />158.0 <br />155.0 <br />152.0 <br />111.0 <br />87.9 <br />91.2 <br />70.7 <br />71.9 <br />71.1 <br />Certification # 1157 <br />RPD Blank <br />7.4 ND <br />5.3 ND <br />4.4 ND <br />2.0 ND <br />3.7 ND <br />1.1 ND <br />Donna Keller <br />Laboratory Director <br />