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CALIFORNIA LABORATORY SERVICES <br /> 02/2710411:38 i <br /> ENSR-Sacramento Project: Former Unocal 0187,437 EafWor,0&9erc#:t&IB0643 <br /> 10411 Old Placerville Rd.,Suite 210 Project Number: 06940-325-100 COC#: 14237,14235,14236 <br /> Sacramento, CA 95827-2508 Project Manager: Ben 1, Heningburg <br /> Volatile Organic Compounds by EPA Method 8260B , <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes ' <br /> NP-2-22 (CNB0643-29)Water Sampled: 02/18/04 08:51 Received:02/19/04 10:20 <br /> Di-isopropyl ether ND 0.50 µg/L I CN01582 02/25/04 02/25/04 EPA 8260B <br /> Ethyl tert-butyl ether ND 0.50 <br /> Methyl tert-butyl ether 1.4 0.50 " <br /> Tert-amyl methyl ether ND 0.50 " <br /> Tert-butyl alcohol ND 5.0 " <br /> Surrogate: Toluene-d8 91.0% 72-125 " <br /> NP-2-60(CNB0643-30)Water Sampled:02/18/04 09:27 Received:02/19/04 10:20 <br /> Di-isopropyl ether ND 0.50 gglL i CN01582 02/25/04 02/25/04 EPA 8260B <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 89.5% 72-125 <br /> NP-2-116(CNB0643-31)Water Sampled: 02/18/04 10:19 Received: 02/19/04 10:20 <br /> Di-isopropyl ether ND 0.50 pg/L 1 CN01582 02/25/04 02/25/04 EPA 82608 <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 1 <br /> Surrogate: Toluene-d8 90.0% 72-125 " <br /> Trip Blank(CNB0643-32)Water Sampled: 02/16/04 06:00 Received:02/19/04 10:20 ' <br /> Di-isopropyl ether ND 0.50 ug/L I CN01521 02/24/04 02/24/04 EPA 8260B <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 /> Tert-butyl alcohol ND 5.0 <br /> Surrogate: Toluene-d8 96.5% 72-125 ' <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 />