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01/05/2005 12:35 2095720916 GEO PAGE 20/23 <br /> Geo AnalYti ical Laboratories, Inc. <br /> 1405 Kansas Avenue Modesto,CA 95351 Phone(209)572-0900 Fax(209)572-0916 <br /> Report# Q352-02 QC REPORT <br /> Thorpe Oil Dates Analyzed 12/21/04 <br /> PO Box 357 <br /> Lodi CA 95241 <br /> LCS MS% MSD% RFD Blank <br /> Analyte Batch # Method %Recovery Recovery Recovery <br /> Methyl tertiary-Butyl Ether V00453 8260B 106.5 117.8 129.5 9.5 ND <br /> Di-isopropyl Ether(DIPE) 94.3 97.5 93.3 4.5 ND <br /> Benzene 103.0 101.3 99.3 2.0 ND <br /> tertiary-Amyl Methyl Ether 106.0 111.3 121.0 8.4 <br /> Toluene ND <br /> 114.3 107.5 103.3 4.0 ND <br /> Comments: <br /> Mario D bnofi'o Donna Keller <br /> Chemist Certification #2585 Laboratory Director <br />