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CALIFORNIA LABORATORY SERVICES 02127/0411:38 ENSR-Sacramento Project: Former Unocal 0187,437 E Lft0rr &'9,t ct1:t&B0643 10411 Old Placerville Rd., Suite 210 Project Number: 06940-325-100 COC 4: 14237,14235,14236 Sacramento,CA 95827-2508 Project Manager: Ben 1.Heningburg Volatile Organic Compounds by EPA Method 8260B Reporting Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes U-22(CNB0643-21)Water Sampled:02/16/04 15:41 Received: 02/19/04 10:20 Di-isopropyl ether ND 0.50 pg/L I CN01582 02/25/04 02/25/04 EPA 8260B Ethyl tert-butyl ether ND 0.50 Methyl tert-butyl ether ND 0.50 " Tert-amyl methyl ether ND 0.50 " Tert-butyl alcohol ND 5.0 " Surrogate: Toluene-d8 89.2% 72-125 U-23(CNB0643-22)Water Sampled:02/16/04 15:20 Received:02/19/04 10:20 Di-isopropyl ether 0.87 0.50 gg/L 1 CN01582 02/25/04 02/25/04 EPA 8260E Ethyl tert-butyl ether ND 0.50 " Methyl tent-butyl ether ND 0.50 " Tert-amyl methyl ether ND 0.50 " Tert-butyl alcohol ND 5.0 man Surrogate: Toluene-d8 88.8% 72-125 " U-24(CNB0643-23)Water Sampled:02/17/04 12:17 Received:02/19/04 10:20 Di-isopropyl ether ND 0.50 gg/L t CN01582 02/25/04 02/25/04 EPA 8260B Ethyl tert-butyl ether ND 0.50 " Methyl tert-butyl ether ND 0.50 " Tert-amyl methyl ether ND 0.50 , Tert-butyl alcohol ND 5.0 " Surrogate: Toluene-d8 88.9% 72-125 " U-25(CNB0643-24)Water Sampled:02/17/04 11:46 Received: 02/19/04 10:20 ' Di-isopropyl ether 1.2 0.50 µg/L 1 CN01582 02/25/04 02/25/04 EPA 8260B Ethyl tert-butyl ether ND 0.50 Methyl tert-butyl ether ND 0.50 " Tert-amyl methyl ether ND 0.50 " Tert-butyl alcohol ND 5.0 " Surrogate: Toluene-d8 89.5% 72-125 CA DOHS FLAP Accreditation/Registration Number 1233 3249 Fitzgerald Road Rancho Cordova,CA 95742 www.californialab.com 916-638-7301 Fax: 916-638-4510