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COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report <br /> Client Applied Earth Sciences, Inc _ Service Request X2400480 <br /> I Project Canteen Corp Date Extracted 05/19/2004 <br /> pie Matrix Water Date Analyzed 05/19/2004 <br /> 4w 1 <br /> Lab Control Spike/Duplicate Lab Control Spike Summary <br /> Volatile Organic Compounds <br /> Extraction Method EPA 5030E Units ug/L <br /> Analysis Method 8260B Basis NA <br /> Level Low <br /> Extraction Lot XWG0400568 <br /> Lab Control Sample Duplicate Lab Control Sample <br /> I XWG0400568-3 XWG0400568-4 <br /> Lab Control Spike Duplicate Lab Control Spike %Rec RPD <br /> Analyte Name Result Expected %Rec Result Expected %Rec Limits RPD Limit <br /> Methyl tent-Butyl Ether 106 100 106 123 100 123 * 72-119 15 30 <br /> Benzene 112 100 112 110 100 110 78-120 2 10 <br /> 1,2-Dichloroethane 114 100 114 112 100 112 68-128 2 15 <br /> Toluene 113 100 113 110 100 110 77-125 3 10 <br /> 1,2-Dibromoethane 100 100 100 103 100 103 76-113 2 15 <br /> Ethylbenzene 122 100 122 117 100 117 81-124 4 10 <br /> m,p-Xylenes 240 200 120 228 200 114 83-123 5 10 <br />' o-Xylene 116 100 116 110 100 110 82-116 5 10 <br /> tert-Butyl Alcohol 114 100 114 145 100 145 * 56-135 24 * 20 <br /> Dusopropyl Ether 108 100 108 117 100 117 71-125 8 30 <br /> Amyl Methyl Ether 994 100 99 11 1 100 111 71-120 11 20 <br /> -Butyl Ethyl Ether 980 100 98 121 100 121 * 69-119 21 * 20 <br /> I <br /> I <br /> 1 <br /> Its Mgged with an asterisk(*)indicate values outside control criteria <br />' cent rewvencs and relative percent differences(RPD)are determined by the software usrna values in the calculation which have not been rounded <br /> Printed 05/29/2004 09 38 26 Form 3C-Organic Page j of j <br />' L 18TEALThhCRYSTAL RPT\Fonn3DLC rpt SuperSel Reference RR4622 <br />