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I ,iCALIFORNIA LABORATORY SERVICES <br /> 1 08/30/04 09:43 <br /> ENSR-Sacramento Project; Former Unocal 0187,437 EKS WonMdeoc# ZQ711 <br /> 10411 Old Placerville Rd., Suite 210 Project Number: 06940-325-100 COC 4: 1,2,3 <br /> Sacramento,CA 95827-2508 Project Manager: Ben I.Heningburg <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> 1 <br /> Reporting Spike Source °/OREC RPD <br /> ' Analyte Result Limit Units Level Result °/*REC Limits RPD Limit Notes <br /> Batch CN06577-EPA 5030 Water MS <br /> LCS Dup(CN06577-BSDI) Prepared&Analyzed:08/25/04 <br /> Methyl tert-butyl ether 20.4 0.50 pg/L 20.0 102 52-130 4.51 30 <br /> Surrogate: Toluene-d8 10.6 10.0 106 72-115 <br /> 'Batch CN06605-EPA 5030 Water MS <br /> Blank(CN06605-BLK1) Prepared&Analyzed:081.26104 <br /> ether ND 0.50 pg/L <br /> ,Di-isopropyl <br /> Ethyl tert-butyl ether ND 0.50 <br /> Methyl tent-butyl ether ND 0.50 <br /> tert-Amyl methyl ether ND 0.50 " <br /> '911ftutyl alcohol ND 5.0 <br /> S gale: Toluene-d8 9.22 " 10.0 92.1 72-115 <br /> LCS(CN06605-BS1) Prepared&Analyzed:08/26/04 <br /> Methyl tert-butyl ether 21.4 0.50 pg/L 20.0 107 52-130 <br /> Surrogate: Toluene-d8 10.3 10.0 103 72-115 <br /> ,LCS Dup(CN06605-BSDI) Prepared&Analyzed:08/26/04 <br /> Methyl ten-butyl ether 20.0 0.50 pg/L 20.0 100 52-130 6.76 30 <br /> Surrogate: Toluene-d8 10.6 10.0 106 72-125 <br /> 1 <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> 1249 Fitzgerald Road Rancho Cordova, CA 95742 www.californialab.com 916-638-7301 Fax: 916-638-4510 <br />