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GeoAnal tical Laboratories Inc. <br /> Y ' <br /> 1405 Kansas Avenge Phone (209) 572-0900 <br /> Modesto, CA 95351 FAX (209) 572-0916 <br /> QC REPORT <br /> ' Report# J202-18 Date: 08/14/98 <br /> Lab ID Dates Analyzed: 07/24/98 <br /> American Geological Services Method: 8020 <br /> ' 14847 Mono Way <br /> Sonora CA 95370 <br /> Samples Analyzed: J21124-27 <br /> Sample Spiked: Method Spike <br /> t • <br /> Analyte Method Spike Method Spike RPD Blank <br /> % Recovery Duplicate % <br /> ' Recovery <br /> Benzene 98.2 96.3 1.9 ND <br /> Toluene 98.1 92.8 5.5 ND <br /> Ethyl Benzene 98.4 96.5 2.0 ND <br /> Gasoline 106.7 105.8 0.8 ND <br /> Sylvia Krenn Donna Keller <br /> Chemist Certification # 1157 Laboratory Director <br />