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CALIFORNIA LABORATORY SERVICES <br /> 02/27/04 11:38 <br /> ENSR-Sacramento Project: Former Unocal 0187,437 ELLS wor0dr9erc#:t&643 <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 /> nalyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> :-18(CNB0643-17)Water Sampled: 02/16/04 14:49 Received:02/19/04 10:20 <br /> Di-isopropyl ether 0.67 0.50 pg/L I CN01521 02/24/04 02/24/04 EPA 8260B <br /> thyl tert-butyl ether ND 0.50 <br /> ethyl tent-butyl ether ND 0.50 <br /> Tert-amyl methyl ether ND 0.50 " <br /> Iff ert-butyl alcohol ND 5.0 " <br /> urrogate: Toluene-d8 101 % 72-1.25 11 11 " <br /> U-19(CNB0643-18)Water Sampled: 02/16/0414:25 Received:02/19/04 10:20 <br /> Iiil-isopropyl ether 1.8 0.50 pg/L 1 CN01521 02/24/04 02/24/04 EPA 8260B <br /> thy/tert-butyl ether ND 0.50 " <br /> Methyl tert-butyl ether ND 0.50 " <br /> f'�amyl methyl ether — ND 0.50 <br /> �utyl alcohol ND 5.0 <br /> Surrogate: Toluene-d8 100% 72-125 11 F, " <br /> -20(CNB0643-19)Water Sampled: 02/17/04 09:45 Received:02/19/04 10:20 <br /> i-isopropyl ether 0.76 0.50 pg/L I CN01521 02/24/04 02/24/04 EPA 8260E <br /> Ethyl tert-butyl ether ND 0.50 " <br /> ffi4ethyl tert-butyl ether ND 0.50 <br /> ert-amyl methyl ether ND 0.50 <br /> ert-butyl alcohol ND 5.0 " <br /> turrogate: Toluene-d8 967% 72-125 " <br /> -21 (CNB0643-20)Water Sampled: 02/17/0409:18 Received:0211910410:20 <br /> Di-isopropyl ether 3.2 0.50 pg/L 1 CN01521 02/24/04 02/24/04 EPA 8260B <br /> thyl tert-butyl ether ND 0.50 " <br /> ethyl tert-butyl ether ND 0.50 <br /> ert-amyl methyl ether ND 0.50 " <br /> Tert-butyl alcohol ND 5.0 " <br /> lurrogate: Toluene-d8 98.4% 72-125 " <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> U9 Fitzgerald Road Rancho Cordova, CA 95742 www.californialab.com 916-638-7301 Fax: 916-638-4510 <br />