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CALIFORNIA LABORATORY SERVICES <br /> i ' 11/30/04 13:17 <br /> ENSR-Sacramento Project: Former Unocal 0 187,43 7 E& Worlc Melrck-'�EQ709 <br /> 10411 Old Placerville Rd., Suite 210 Project Number: 06940-325-100 COC 4: 1,2, 3 <br /> Sacramento,CA 95827-2508 Project Manager: Ben 1-leningburg <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Nate <br /> U-18(CNK0709-17)Water Sampled: 11/18/04 10:41 Received: 11/19/04 10:53 <br /> Di-isopropyl ether ND 0.50 µg1L 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 93.8% 72-125 " <br /> U-19(CNK0709-18)Water Sampled: 11/16/04 15:25 Received: 11/19/04 10:53 <br /> Di-isopropyl ether 1.3 0.50 µg/L 1 CN09089 11/23/04 11/23/04 EPA 8260B <br /> Ethyl tert-butyl ether ND 0.50 " <br /> Methyl Cert-butyl ether ND 0.50 " <br /> �myl methyl ether ND 0.50 " <br /> 1�f-butyl alcohol ND 5.0 " <br /> Surrogate: Toluene-d8 93.5% 72-125 " <br /> U-20(CNK0709-19)Water Sampled: 11/17/0414:50 Received: 11/19/0410:53 <br /> Di-isopropyl ether 0.80 0.50 uglL 1 CN09089 11/23/04 11/23/04 EPA 8260E <br /> ' Ethyl tert-butyl ether ND 0.50 <br /> Methyl tert-butyl ether ND 0.50 " <br /> tent-Amyl methyl ether ND 0.50 " <br /> Tert-butyl alcohol 11 5.0 " <br /> Surrogate: Toluene-d8 94.3% 72-125 " <br /> U-21 (CNK0709-20)Water Sampled. 11/16/04 17:27 Received: 11/19/04 10:53 <br /> Di-isopropyl ether 3.0 0.50 µg/L 1 CN09089 11/23/04 11/23/04 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 24 5.0 " <br /> ' Surrogate: Toluene-d8 93.7% 72-125 <br /> 01 <br /> i <br /> CA DOHS ELAP Accreditation/Registration Number 1233 i <br /> 3249 Fitzgerald Road Rancho Cordova, CA 95742 www.californialab.com 916-638-7301 Fax: 916-638-4510 <br />