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GeoAnalytical Laboratories, Inc. <br /> • 1405 Kansas Avenue Phone 209 572-0900 <br /> ' ( ) <br /> Modesto, CA 95351 FAX (209) 572-0916 <br /> ' QC REPORT <br /> ' Report# J196-19 Date: 08/14/98 <br /> Lab ID Dates Analyzed: 07/16/98 <br /> American Geological Services Method: 8020 <br /> 14847 Mono Way <br /> Sonora CA 95370 <br /> Samples Analyzed: J21042-43 <br /> Sample Spiked: J21038 <br /> Analyte Matrix Spike Matrix Spike RPD BIank <br /> % Recovery Duplicate % <br /> ' Recovery <br /> Benzene 94.4 97.9 3.7 N D <br /> ' Toluene 88.0 88.5 0.5 ND <br /> Ethyl Benzene 83.2 84.6 1.7 ND <br /> Gasoline 97.1 94.9 2.2 ND <br /> 1 <br /> 1 � <br /> ' S 1is Krenn Donna Keller <br /> Chemist Certification # 1157 Laboratory Director <br />