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' CALIFORNIA LABORATORY SERVICES <br /> 11/30/04 13:17 <br /> ENSR-Sacramento Project: Former Unocal 0187,437 E& Wor,&H 9eo#-!"709 <br /> 1 10411 Old Placerville Rd.,Suite 210 Project Number: 06940-325-100 COC#: 1, 2,3 <br /> Sacramento,CA 95827-2508 Project Manager: Ben Heningburg <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 /> Batch CN09034-EPA 5030 Water MS <br /> ' Blank(CN09034-BLKI) Prepared&Analyzed: 11/19/04 <br /> Di-isopropyl ether ND 0.50 µg/1. <br /> Ethyl tert-butyl ether ND 0.50 <br /> Methyl tort-butyl ether ND 0.50 " <br /> ' tert-Amyl methyl ether ND 0.50 " <br /> Tert-butyl alcohol ND 5.0 " <br /> Surrogate: Toluene48 9.40 10.0 94.0 72-125 <br /> LCS(CN09034-BS1) Prepared&Analyzed: 11/19/04 <br /> Methyl tent-butyl ether 21.0 0.50 pg/L 20.0 105 52-130 <br /> - gate: Toluene d8 10.0 10.0 100 72-125 <br /> Dup(CN09034-BSD1) Prepared&Analyzed: 11/19/04 <br /> Methyl tert-butyl ether 20.7 0.50 lig/L 20.0 104 52-130 1.44 30 <br /> Surrogate: Toluene-0 9.69 10.0 96.9 72-125 <br /> Batch CN09059- EPA 5030 Water MS <br /> 1 Blank(CN09059-BLKI) Prepared&Analyzed: 11/22/04 <br /> Di-isopropyl ether ND 0.50 pg/L <br /> Ethyl tent-butyl ether ND 0.50 " <br /> Methyl tert-butyl ether ND 0.50 " <br /> tert-Amyl methyl ether ND 0.50 <br /> Teri-butyl alcohol ND 5.0 <br /> Surrogate: Toluene-d8 8.56 10.0 85.6 72-125 <br /> LCS(CN09059-BS1) Prepared&Analyzed: 11/22/04 <br /> Miethyl tert-butyl ether t8.0 0.50 µg/L 20.0 90.0 52-130 <br /> 1 Surrogate: Toluene-d8 11.0 10.0 110 72-125 <br /> CA DOHS FLAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova, CA 95742 www.californialab.com 916-638-7301 Fax. 916-638-4510 <br />