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CALIFORNIA LABORATORY SERVICES <br /> 05/31/05 11:16 <br /> APEX Envirotech Inc.-Gold River Project: Moore Petroleum <br /> 11244 Pyrites Way Project Number: ERA02.004 CLS Work Order#: COE0712 <br /> Gold River,CA 95670 Project Manager: Rich Johnson COC#: <br /> Volatile Organic Compounds by EPA Method 8260B - <br /> Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch C003898-EPA 5030 Water MS <br /> Blank(CO03898-BLKI) Prepared&Analyzed:05/24/05 <br /> Di-isopropyl ether ND 0.50 gg/L <br /> Ethyl tert-butyl ether ND 0.50 " <br /> Methyl tert-butyl ether ND 0.50 " <br /> tert-Amyl methyl ether ND 0.50 " <br /> Tert-butyl alcohol ND 5.0 " <br /> Surrogate:Toluene-d8 9.13 10.0 91.3 72-12S <br /> LCS(CO03898-BSI) Prepared&Analyzed:05/24/05 <br /> + Methyl tert-bury]ether 17.0 0.50 µg1L 20.0 85.0 52-130 <br /> CSurrogate:Toluene-d8 11.4 10.0 114 72-125 <br /> 'LCS Dup(CO03898-BSD1) Prepared&Analyzed:05/24/05 <br /> Methyl tert-butyl ether 18.7 0.50 pg/L 20,0 93.5 52-130 9.52 30 <br /> Surrogate:Toluene-d8 10.8 10.0 108 72-115 <br /> �7 <br /> i <br /> C <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 />