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� N I <br /> CALIFORNIA LABORATORY SERVICES <br /> i <br /> 04/26/05 15:36 <br /> APEX Envirotech Inc.-Gold River Project: Moore Petroleum <br /> 11244 Pyrites Way Project Number: ERA02.004 CLS Work Order#:COD0709 <br /> Gold River,CA 95670 Project Manager: Rich Johnson <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> - 1 <br /> Reporting Spike Source %REC RPD ' <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch C003023-EPA 5030 Water MS <br /> Blank(CO03023-BLKI) Prepared&Analyzed:04/21/05 <br /> Di-isopropyl ether ND 0.50 µg/3.. <br /> Ethyltert-butylether ND 0.50 " <br /> Methyl tert-butyl ether ND 0.50 " <br /> tert-Amyl methyl ether ND 0.50 ° <br /> f <br /> Ten-butyl alcohol ND 5.0 <br /> Surrogate:Toluene-& 9.95 10.0 99.5 71-125 <br /> LCS(CO03023-BS1) Prepared&Analyzed:04/21/05 <br /> Methyl tert-butyl ether 22.7 0.50 gg/L 20.0 114 52-130 <br /> a <br /> Surrogate:Toluene-d8 11.4 10.0 114 71-115 <br /> LCS Dup(CO03023-BSD1) Prepared&Analyzed:04/21/05 <br /> Methyl tert-butyl ether 24.7 0.50 µgIL 20.0 124 52-130 8.44 30 <br /> Surrogate:Toluene-d8 11.3 10.0 113 71-125 <br /> i <br /> i <br /> i <br /> i <br /> I <br /> I <br /> 1 <br /> i <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova, CA 95742 www.californialab.com . 916-638-7301 Fax: 916-638-4510 <br /> i <br />