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GeoAnalY tical Laboratories Inc. <br /> 1 1405 Kansas Avenue Phone (209) 572-0900 <br /> Modesto, CA 95351 FAX (209) 572-0916 <br /> QC REPORT <br /> ' Report# J197-18 Date: 08/14/98 <br /> Lab ID Dates Analyzed: 07/20/98 <br /> t American Geological Services Method: 8020 <br /> 14847 Mono Way <br /> Sonora CA 95370 <br /> Samples Analyzed: J21071 <br /> Sample Spiked: J21073 <br /> 1• <br /> Analyte Matrix Spike Matrix Spike RPD Blank <br /> % Recovery Duplicate % <br /> ' Recovery <br /> Benzene 93.0 92.2 0.9 ND <br /> t Toluene 91.2 90.1 1.2 ND <br /> Ethyl Benzene 91.5 91.4 0.2 ND <br /> Gasoline 103.9 98.4 5.4 ND <br /> i <br /> 1 <br /> i 1 <br /> 1 <br /> 1 <br /> ' Sylvia Krenn Donna Keller <br /> Chemist Certification # 1157 Laboratory Director <br />