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GeoAnal tical Laboratories Inc. <br /> Y , <br /> 1405 Kansas Avenue Modesto,CA 95351 Phone (209)572-0900 Fax (209)572-0916 <br /> Report# K074-16 QC REPORT QC Batch# V00102 <br /> Semco(Modesto) <br /> 1217 S 7th Street <br /> Modesto CA 95351 <br /> Dates Analyzed 3/19/99 <br /> Samples Analyzed: K20987-K20988c,K20989-K20990c,K20991-K20992 Sample Spiked: K20987 <br /> c,K20993-K20999 <br /> MS% MSD% RPD Blank <br /> Analyte Method Recovery Recovery <br /> 1,1-Dichloroethene 8260 99.2 102.3 3.1 ND <br /> Trichloroethene 109.7 111.0 1.2 ND <br /> Chlorobenzene 103.4 102.4 1.0 ND <br /> Toluene 102.8 101.6 1.2 ND <br /> Benzene 104.8 101.9 2.9 ND <br /> Comments: <br /> Sylvia Krenn Donna Keller <br /> Chemist Certification # 1157 Laboratory Director <br />