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COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report <br /> Client Applied Earth Sciences,Inc Service Request L2400548 <br /> Project Canteen Corp/AGE-NC-99-0612 Date Extracted 03/08/2004 <br /> Ople Matrix Water Date Analyzed 03/08/2004 <br /> 1 <br /> Matrix Spike/Duplicate Matrix Spike Summary <br /> Volatile Organic Compounds <br /> ISample Name Batch QC Units ug/L <br /> Lab Code L2400467-004 Basis NA <br /> IExtraction Method EPA 5030B Level Low <br /> Analysis Method 8260B Extraction Lot LWG0401005 <br /> I Batch QCMS Batch QCDMS <br /> LWG0401005-1 LWG0401005-2 <br /> Sample Matrix Spike Duplicate Matrix Spike %Rec RPD <br /> Analyte Name Result Result Expected %Rec Result Expected %Rec Limits RPD Limit <br /> Benzene ND 100 100 100 966 100 97 82-126 4 25 <br /> 1,2-Dichloroethane(EDC) ND 116 100 116 113 100 113 81-I34 2 25 <br /> Ethylbenzene ND 972 100 97 934 100 93 83-129 4 25 <br /> Toluene ND 986 100 99 950 100 95 84-128 4 25 <br /> Methyl tent-Butyl Ether ND 197 200 99 199 200 100 80-125 1 25 <br /> I <br /> I <br /> *Its flagged with an asterisk(*}indicate values outside control criteria <br /> Results flagged with a pound(#)indicate the control criteria is not applicable <br /> Percent recoveries and relative percent differences(RPD)are determined by the software using values in the calculation which have not been rounded <br /> 15 <br /> Printed 03/12/2004 15 48 34 Form 3A-Organic Page 1 of 1 <br /> P 1STEALTFi1CRYSTAL RPT1Fonn3DMS rpt SuperSct Reference RR5281 <br />