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CALIFORNIA LABORATORY SERVICES , <br /> 11/30/04 13:17 ' <br /> ENSR-Sacramento Project: Former Unocal 0187,437 E&Mork grde ckt�709 <br /> 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 <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> U-14(CNK0709-13)Water Sampled: 11/17/0410:50 Received: 11/19/04 10:53 <br /> Di-isopropyl ether ND 0.50 pg/L 1 CN09068 11/22/04 11/22/04 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 94.0% 72-125 <br /> U-15(CNK0709-14)Water Sampled: 11/17/04 12:00 Received: 11/19/04 10:53 <br /> Di-isopropyl ether ND 0.50 µg/L I CN09068 11/22/04 11/22/04 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 94,0% 72-125 <br /> U-16(CNK0709-15)Water Sampled: 11/16/04 13:41 Received: 11/19/04 10:53 <br /> Di-isopropyi ether ND 0.50 vg/L I CN09068 11722/04 11/22/04 EPA 82608 <br /> Ethyl tert-butyl ether ND 0.50 <br /> Methyl tent-butyl ether ND 0.50 " <br /> tert-Amyl methyl ether ND 0.50 <br /> Tert-butyl alcohol ND 5.0 ' <br /> Surrogate: Toluene-d8 92.8% 72-125 " <br /> U-17(CNK0709-16)Water Sampled: 11/16/04 14:05 Received: 11/19/04 10:53 <br /> Di-isopropyl ether 1.1 0.50 µg/L I CN09068 11/22/04 11/22/04 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 7.4 5.0 <br /> Surrogate: Toluene-d8 94.7% 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 />