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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# J226-08 Date: 08/17/98 <br /> Lab ID Dates Analyzed: 08/14/98 <br /> Thorpe Oil Method: 8020 <br /> 351 N Beckman <br /> Lodi CA 95240 <br /> Samples Analyzed: J21370-J21379 <br /> Sample Spiked: J21304 <br /> Analyte Matrix Spike Matrix Spike RPD Blank <br /> % Recovery Duplicate % <br /> Recovery <br /> Benzene 95.8 95.2 0.5 ND <br /> Toluene 94.1 95.4 1.4 ND <br /> Ethyl Benzene 94.4 96.5 2.2 ND <br /> Gasoline 97.1 102.0 4.7 ND <br /> Sylvia Krenn Donna Keller <br /> Chemist Certification # 1157 Laboratory Director <br />