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..i <br /> GeoAnalytical Laboratories, Inc. <br /> 1405 Kansas Avenue Phone (209) 572-0900 <br /> Modesto, CA 95351 FAX (209) 572-0916 <br /> QC REPORT <br /> Report# J247-11 Date: 09/13/98 <br /> Lab ID Dates Analyzed: 9/10-9/12/98 <br /> Thorpe Oil Method: 8020 <br /> 351 N Beckman <br /> Lodi CA 95240 <br /> Samples Analyzed: J21584throughJ21593 <br /> Sample Spiked: Organic Free Sand <br /> Analyte Matrix Spike Matrix Spike Relative Blank <br /> %Recovery Duplicate % Percent <br /> Recovery Difference(%) <br /> Benzene 97.4 98.1 0.7 ND <br /> Toluene 94.1 95.2 1.2 ND <br /> Ethyl Benzene 98.6 99.5 1.0 ND <br /> Gasoline 103.2 104.6 1.3 ND <br /> Sylvia Krenn Donna7Celle�' <br /> Chemist Certification # 1157 Laboratory Director <br />