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GeoAnalytical Laboratories Inc. <br /> 1405 Kansas Avenue Modesto,CA 95351 Phone (209) 572-0900 Fax (209) 572-0916 <br /> Report# K074-16 QC REPORT <br /> QC Batch# V00103 <br /> Semco(Modesto) <br /> 1217 S 7th Street <br /> Modesto CA 95351 <br /> Dates Analyzed 3/19/99 <br /> Samples Analyzed: K20995-K20999,K20987-K20988c,K20989-K20990c,Sample Spiked: K20985 <br /> K20991-K20992c <br /> MS% MSD% RPD Blank <br /> Analyte Method Recovery Recovery <br /> Benzene 8020/5030 LUFT 95.2 93.8 1.5 ND <br /> Toulene 88.2 87.4 0.9 ND <br /> Ethyl Benzene 93.6 92.8 0.9 ND <br /> Gasoline 97.7 98.6 1.0 ND <br /> Comments: <br /> Sylvia Krenn Donna Keller <br /> Chemist Certification # 1157 Laboratory Director <br />