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CALIFORNIA LABORATORY SERVICES ' <br /> 08/30/04 09:43 , <br /> ENSR-Sacramento Project: Former Unocal 0187,437 EftNe, 'de�c#:t�711 <br /> 10411 Old Placerville Rd., Suite 210 Project Number: 06940-325-100 COC#: 1,2,3 , <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 Note <br /> U-1 (CNH0711-01)Water Sampled: 08/20/0412:12 Received: 08/20/04 18:17 ' <br /> Di-isopropyl ether ND 0.50 pg/L 1 CN06537 08124/04 08/24/04 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 97.1 % 72-125 <br /> U-2(CNH0711-02)Water Sampled: 0811910415:35 Received:08/20/0418:17 <br /> Di-isopropyl ether ND 0.50 pg/L 1 CN06577 08/25/04 08/25/04 EPA 8260B <br /> Ethyl tert-butyl ether ND 0.50 <br /> Methyl tent-butyl ether ND 0.56 <br /> tert-Amyl methyl ether ND 0.50 <br /> Tert-butyl alcohol ND 5.0 " <br /> Surrogate: Toluene-d8 960% 72-125 <br /> U-3(CNH0711-03)Water Sampled: 08/20/04 12:54 Received:08/20/04 18:17 <br /> Di-isopropyl ether ND 0.50 pg/L 1 CN06537 09/24/04 08!24/04 EPA 8260E <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 95.1 % 72-125 <br /> U-4(CNH0711-04)Water Sampled:08/20/04 13:30 Received:08/20/04 18:17 , <br /> Di-isopropyl ether ND 0.50 pg/L 1 CN06537 08/24104 08/24/04 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 91,7% 72_125 ' <br /> • <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 />