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CALIFORNIA LABORATORY SERVICES <br /> ' 11/30/04 13:14 <br /> ENSR-Sacramento Project: Former Unocal 0187,437 E& Work i�derc#:5K0720 <br /> 10411 Old Placerville Rd.,Suite 210 Project Number: 06940-325-100 COC 4: <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 /> Analyfe Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch CN09034-EPA 5030 Water MS <br /> Blank(CN09034-BLK1) Prepared&Analyzed: 11/19/04 <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 "tert-Amyl methyl ether ND 0.50 „ <br /> Tert-butyl alcohol ND 5.0 <br /> Surrogole:Toluene48 9.40 10.0 94.0 72-125 <br /> ' LCS(CN09034-BSI) Prepared&Analyzed: 11/19/04 <br /> Methyl tert-butyl ether 21.0 0.50 µg/L 20.0 105 52-130 <br /> 0 I gate:Toluene-d8 10.0 " 10.0 100 71-125 <br /> Dup(CN09034-BSD1) Prepared&Analyzed: l 1/19/04 <br /> Methyl tert-butyl ether 20.7 0.50 µg/L 20.0 104 52-130 1.44 30 <br /> Surrogate:Toluene-d8 9.69 10.0 96.9 72-125 <br /> i <br /> 1 <br /> I <br /> I <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova, CA 95742 www.californislab.com 916-638-7301 Fax: 916-638-4510 <br /> I'� <br />