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CALIFORNIA LABORATORY SERVICES <br /> 09/29/04 16:49 <br /> APEX Envirotech Inc.-Gold River Project: Moore Petroleum <br /> 11244 Pyrites Way Project Number: ERA02.004-QM CLS Work Order#:CNI0755 <br /> Gold River,CA 95670 Project Manager: Rich Johnson COC#: 1,2 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit units Level Result %REC Limits RPD Limit Notes <br /> 1 <br /> Batch CN07500-EPA 5030 Water MS <br /> Blank(CN07500-BLKI) Prepared&Analyzed:09/28/04 <br /> Di-isopropyl ether ND 0.50 µg/L <br /> Ethyl tert-bury]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 8.76 10.0 87.6 72-115 <br /> LCS(CN07500-BSI) Prepared&Analyzed.09/28/04 <br /> Methyl tent-butyl ether 17.6 0.50 µg/L 20.0 88.0 52-130 <br /> �. Surrogate:Toluene-d8 10.0 10.0 100 72-115 <br /> LCS Dup(CN07500-BSDI) Prepared&Analyzed:09/28/04 <br /> Methyl cert-butyl ether 17.8 0.50 µg/L 20.0 89.0 52-130 1.13 30 , <br /> Surrogate:Toluene-d8 9.96 10.0 99.6 72-125 <br /> Batch CN07537-EPA 5030 Water MS <br /> Blank(CN07537-BLKI) Prepared&Analyzed:09/29/04 <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 <br /> tert-Amyl methyl ether ND 0.50 " <br /> Tert-butyl alcohol ND 5.0 <br /> Surrogate:Toluene-d8 8.68 10.0 86.8 71-125 <br /> LCSCN07537-BSI)( ) Prepared&Analyzed:09/29/04 <br /> Methyl tert-butyl I ether <br /> Y tY 17.4 0.50 µgli, 20.0 $7.0 52-130 F <br /> Surrogate:Toluene-d8 9.89 10.0 98.9 72-125 <br /> 3 <br /> i <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 />