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CALIF <br /> ORNIA LABORATORY SERVICES <br /> 07/26/04 15:21 <br /> APEX Envirotech Inc.-Gold River Project: Moore Petroleum <br /> 11244 Pyrites Way Project Number: ERA02.004 CLS Work Order#:CN G0671 <br /> Gold River,CA 95670 Project Manager: Rich Johnson COC#:32354 <br /> Volatile Organic Compounds by EPA Method 8260B -Quality Control <br /> l <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch CN05718-EPA 5030 Water MS <br /> i <br /> Blank(CN05718-BLK1) Prepared&Analyzed;07/22/04 <br /> Di-isopropyl ether ND 0.50 µg/L <br /> Ethyl tert-butyl ether ND 0.50 <br /> Methyl tert-butyl ether ND 0.50 i <br /> tert-Amyl methyl ether ND 0.50 " <br /> Tert-butyl alcohol ND 5.0 <br /> Surrogate:Toluene-d8 9.79 10.0 97.9 72-125 <br /> LCS(CN05718-BSI) Prepared&Analyzed:07/22/04 <br /> Methyl cert-butyl ether 20.7 0.50 µg/L 20.0 104 52-130 g <br /> Surrogate:Toluene-d8 12.3 10.0 113 72-125 <br /> II <br /> LCS Dup(CN05718-BSD1) Prepared&Analyzed:07/22/04 <br /> Methyl tert-butyl ether 20.7 0.50 µg/L 20.0 104 52-130 0.00 30 <br /> Surrogate:Toluene-d8 11.9 10.0 119 72-125 <br /> h <br /> I� <br /> k <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 />