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�. CALIFORNIA LABORATORY SERVICES <br /> Page 13 of 14 11117/05 11:28 <br /> APEX Envirotech Inc.-Gold River Project: Moore Petroleum <br /> 11244 Pyrites Way Project Number: ERA02.004 CLS Work Order#:COK0413 <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 C008324-EPA 5030 Water MS <br /> t <br /> Blank(CO08324-BLKI) Prepared&Analyzed: 11/11/05 <br /> Di-isopropyl ether ND 0.50 µ81L <br /> i Ethyl tert-butyl ether ND 0.50 <br /> i4 Methyl tert-butyl ether ND 0.50 <br /> tert-Amyl methyl ether ND 0.50 " <br /> Ten-butyl alcohol ND 5.0 <br /> Surrogate:Toluene-d8 9.61 10.0 96.1 72-115 <br />{ LCS(CO08324-BS1) Prepared&Analyzed: 11/11/05 a <br /> i, Methyl tert-butyl ether 21.7 0.50 µg/L 20.0 108 52-130 <br /> I Surrogate:Toluene-d8 10.0 10.0 100 72-115 <br /> CS Dup(CO08324-BSD1) Prepared&Analyzed: 11/11/05 <br /> Methyl tert-butyl ether 20.3 0.50 µglL 20.0 102 52-130 6.67 30 <br /> F Surrogate:Toluene-d8 10.2 10.0 102 72-125 <br /> U <br /> k <br /> i <br /> i 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 />