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GeoAnalytical Laboratories, Inc. <br /> 1405 Kansas Avenue Phone (209) 572-0900 <br /> Modesto, CA 95351 FAX (209) 572-0916 <br /> QC REPORT <br /> Report# J202-15 Date: 7/24/98 <br /> Lab ID Dates Analyzed: 7/23/98 <br /> Thorpe Oil Method: 8020 <br /> 351 N Beckman <br /> Lodi CA 95240 <br /> Samples Analyzed: J21115,J21116 <br /> Sample Spiked: Method Spike <br /> Analyte Method Spike Method Spike Relative Blank <br /> %Recovery Duplicate % Percent <br /> Recovery Difference(%) <br /> Benzene 108.0 107.7 0.3 ND <br /> Toluene 99.8 98.9 1.0 ND <br /> Ethyl Benzene 95.0 95.7 0.7 ND <br /> Gasoline 106.7 109.5 1.6 ND <br /> cl:/c <br /> Sylvia Krenn Donna Keller <br /> Chemist Certification # 1157 Laboratory Director <br />