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CALIFORNIA LABORATORY SERVICES <br /> 07/31/03 12:38 <br /> APEX Envirotech Inc.-Gold River Project: Moore Petroleum <br /> 11244 Pyrites Way CLS Work Order#:CMG0912 <br /> Y Y Project Number: ERA02.004 <br />'i Gold River,CA 95670 Project Manager: Rich Johnson <br /> Volatile Organic Compounds b EPA Method 8260B - <br /> � p y Quality Control <br /> I, <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Leel Result °/aREC Limits RPD Limit Notes <br /> Batch CG32601 -EPA 5030 Water MS <br /> Blank(CG32601-BLKI) Prepared.&Analyzed:07/26/03 <br /> Di-isopropyl ether ND 0.50 pg1L. <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 i ND 5.0 <br /> 1,2-Dichloroethane ND 0.50 <br /> Surrogate:Toluene-d8 10.3 10.0 103 72-125 <br /> LCS(CG32601-BSI) Prepared&Analyzed:07/26/03 <br /> Methyl tert-butyl ether 20.2 0.50 pg1L 20.0 101 52-130 <br /> Surrogate:Toluene-d8. 10.5 10.0 105 72-125 <br /> LCS Dup(CG32601-ESDI) Prepared&Analyzed:07/26/03 <br /> Methyl tert-butyl ether- 19.1 0.50 µg/l_ 20.0 . 95.5 52-130 5.60 30 <br /> Surrogate:Toluene-d8 -10.6 10.0 106 72-125 <br /> s <br /> i <br /> r <br /> c CA DOHS ELAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova,CA 95742 www.californialub.com 916-638-7301 Fax: 916-638-4510 <br /> I f - <br />