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' COLUMBIA ANALYTICAL SERVICES, INC <br /> QA/QC Report <br />' Client Applied Earth Sciences, Inc Service Request•- X2400480 <br /> Protect Canteen Corp Date Extracted 05/21/2004 <br /> �mple Matrix Water Date Analyzed 05/21/2004 <br /> IMatrix Spike/Duplicate Matrix Spike Summary <br /> Volatile Organic Compounds <br /> Sample Name Batch QC Units ug/L <br /> Lab Code X2400503-001 Basis NA <br /> IExtraction Method EPA 5030B Level Low <br /> Analysis Method 8260B Extraction Lot: XWG0400584 <br /> I Batch QCMS Batch QCDMS <br /> XWG0400584-1 XWG0400584-2 <br /> Sample Matrix Spike Duplicate Matrix Spike %Rec RPD <br /> Ancil to Name Result Result Expected %Rec <br /> Y p Result Expected /oRec Limits RPD Limit <br /> Methyl tent-Butyl Ether ND 100 100 100 101 100 101 53-145 1 30 <br /> Benzene ND 112 100 112 107 100 107 79-133 4 10 <br /> I1,2-Dichloroethane ND 965 100 87 858 100 86 62-136 1 I5 <br /> Toluene ND 120 100 120 116 100 116 70-144 4 10 <br /> 1,2-Dibromoethane ND 960 100 96 969 100 97 75-115 I 15 <br /> Ethylbenzene ND 114 100 114 117 100 117 73-151 2 10 <br /> m,p-Xylenes ND 220 200 110 22 1 200 ill 84-137 0 10 <br /> o-Xylene ND 113 100 113 102 100 102 82-128 11 * 10 <br /> I tert-Butyl Alcohol ND 962 100 96 990 100 99 50-150 3 30 <br /> Osopropyl Ether ND 11 1 100 111 106 100 106 65-141 5 30 <br /> -Amyl Methyl Ether ND 947 100 95 923 100 92 50-150 3 30 <br /> tert-Butyl Ethyl Ether ND 107 too 107 107 100 107 50-I50 1 30 <br /> I <br /> I <br /> I <br /> I <br /> Its flagged with an asterisk(1)indicate values outside control criteria <br /> Its flagged with a pound(#)indicate the control criteria is not applicable <br /> IPercent i ecoveries and relauvc percent differences(RPD)are deter uned by the software usutg values in the calculation which have not been rounded <br /> Printed 05/29/2004 09 38 20 Form 3A-Organic Page I of 1 <br /> L ISTEALTHICRYSTAL RPT\Fumi3DMS rpt SuperSel Reference RR4622 <br />