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CALIFORNIA LABORATORY SERVICES <br /> W <br /> ,qq kk 0212710411:38 <br /> ENSR- Sacramento Project: Former Unocal 0187,437 EVWWorrkv6dctrck!6"43 <br /> 10411 Old Placerville Rd., Suite 210 Project Number: 06940-325-100 COC#: 14237,14235,14236 <br /> Sacramento,CA 95827-2508 Project Manager: Ben I. Heningburg <br /> ' Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Reporting Spike Source %REC RPD <br /> inalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> etch CN01557-EPA 5030 Water MS <br /> CS Dup(CN01557-BSD1) Prepared&Analyzed:02/25/04 <br /> ethyl tert-butyl ether 20.3 0.50 µg/l- 20,0 102 52-130 3.51 30 <br /> Surrogate: Toluene-d8 10.1 10.0 101 72-125 <br /> Batch CN01582 -EPA 5030 Water MS <br /> Blank(CN01582-BLKI) Prepared:02/12/04 Analyzed:02/25/04 <br /> i-isopropyl ether ND 0.50 µg/L <br /> hyl tent-butyl ether ND 0.50 <br /> ethyl tert-butyl ether ND 0.50 <br /> Tert-amyl methyl ether ND 0.50is <br /> " <br /> utyl alcohol ND 5.0 <br /> bromoethane(EDB) ND 0.50 " <br /> 1,2-Dichloroethane ND 0.50 " <br /> Irrogate: Toluene-d8 8.92 10.0 89.1 71-115 <br /> CS(CN01582-BSI) Prepared:02/12/04 Analyzed:02/25/04 <br /> ethyl tert-butyl ether 18.8 0.50 gg/L 20.0 94.0 52-130 <br /> rrogale: Toluene-d8 8.92 10.0 89.2 72-125 <br /> LCS Dup (CN01582-BSD1) Prepared:02/12/04 Analyzed:02/25/04 <br /> ethyl tent-butyl ether 17.6 0.50 µg/L 20.0 88.0 52-130 6.59 30 <br /> Surrogate: Toluene-d8 8.93 10.0 89.3 72-125 <br /> 1 <br /> CA DOHS FLAP Accred itationlRegistration Number 1233 3 <br /> f <br /> 49 Fitzgerald Road Rancho Cordova, CA 95742 www.californialab.com 916-638-7301 Fax: 916-638-4510 <br />