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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# J197-02 Date: 07/21/98 <br /> Lab ID Dates Analyzed: 7/17-7/20/98 <br /> i <br /> Thorpe Oil Method: 8020 <br /> 351 N Beckman <br /> Lodi CA 95240 <br /> Samples Analyzed: J21044-45 (composite), <br /> J21046-47(composite),and J21048 throughJ21055 <br /> Sample Spiked: Method Spike <br /> Analyte Method Spike Method Spike Relative Blank <br /> %Recovery Duplicate % Percent <br /> Recovery Difference(%) <br /> Benzene 99.5 99.4 0.3 ND <br /> Toluene 97.3 97.6 0.3 ND <br /> Ethyl Benzene 96.5 96.3 0.2 ND <br /> Gasoline 109.8 104.5 5.2 ND <br /> d <br /> ��- <br /> Sylvia Krenn Donna Kellerz� <br /> Chemist Certification # 1157 Laboratory Director �µ��c <br />