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COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report <br /> Client Applied-Earth Sciences,-Inc Service Request X2400480 - <br /> Project Canteen Corp Date Extracted 05/20/2004 <br /> orple Matrix Water Date Analyzed 05/20/2004 <br /> ILab Control Spike/Duplicate Lab Control Spike Summary <br /> Volatile Organic Compounds <br /> IExtraction Method EPA 5030B Units ug/L <br /> Analysis Method 8260B Basis NA <br /> Level Low <br /> Extraction Lot XWG0400570 <br /> Lab Control Sample Duplicate Lab Control Sample <br /> XWG0400570-3 XWG0400570-4 <br /> Lab Control Spike Duplicate Lab Control Spike %Ree RPD <br /> Analyte Name Result Expected %Rec Result Expected %Rec Limits RPD Limit <br /> Methyl tort-Butyl Ether 9 30 100 93 108 100 I08 72-119 15 30 <br /> Benzene 116 100 116 119 100 119 78-120 3 10 <br /> 1,2-Dichloroethane 942 100 94 102 100 102 68-128 8 15 <br /> Toluene 116 100 116 124 100 124 77-125 7 10 <br /> 1,2-Dibromoethane 9 15 100 92 982 100 98 76-113 7 15 <br /> Ethylbenzene 119 too 119 12 1 100 121 81-124 1 10 <br /> m,p-Xylenes 208 200 104 210 200 105 83-123 1 10 <br /> o-Xylene 101 100 101 106 100 106 82-116 4 10 <br /> tert-Butyl Alcohol 83 4 100 83 909 100 91 56-135 9 20 <br /> Diisopropyl Ether 116 100 116 117 100 117 71-125 0 30 <br /> 0-Amyl Methyl Ether 944 100 94 992 100 99 71-120 5 20 <br /> -Butyl Ethyl Ether 998 100 100 107 100 107 69-119 7 20 <br /> I <br /> I <br /> I <br /> Ile flagged with do asllrtsk(')indicate values outside control criteria <br /> 'cent recovenes and relative percent dtff'erences{RPD)are detennuted by the software using values in the calculation which have not becn rounded <br /> IPrinted 05/29/2004 09 38 32 Form 3C-Organic Page I of I <br /> L 1STEALT]WRYSTAL RPT\Frmo3DLC rpt SuperSet Reference RR4622 <br />