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1 CALIFORNIA LABORATORY SERVICES <br /> 07/22/04 16 50 <br /> ENSR-Sacramento Project Former Unocal 2859, 1665 fto ft►X grtgWWnCNG0241 <br /> 10411 Old Placerville Rd,Suite 210 Project Number 06940-357-100 COC# 41216 <br /> Sacramento,CA 95827-2508 Project Manager Ben I Hentngburg <br /> Volatile Organic Compounds by EPA Method 8260B -Quality Control <br /> Reporting Spike Source °/aREC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> etch CN05438-FPA 5030 Water MS <br /> lank(CN05438-BLK1) Prepared&Analyzed 07/12/04 <br /> i-isopropyl ether ND 0 50 µg/L <br /> Ethyl tert-butyl ether ND 050 " <br /> ethyl tert-butyl ether ND 050 <br /> ert-Amyl methyl ether ND 050 " <br /> ert-butyl alcohol ND 5 0 " <br /> 1,2-Dibromoethane(EDB) ND 0 50 " <br /> 9 2-Dichloroethane ND 0 50 " <br /> urrogale Toluene-d8 too 10 0 100 72-115 <br /> {CN05438-BS1) Prepared&Analyzed 07/12/04 <br /> 1 tert-butyl ether 199 050 pg/L 200 99 5 52-130 <br /> Surrogate Toluene-d8 986 10 0 98 6 72-125 <br /> CS Dup(CN05438-BSD1) Prepared&Analyzed 07/12/04 <br /> ethyl tert-butyl ether 198 0 50 gg/L 200 99 0 52-130 0 504 30 <br /> Surrogate Toluene-d8 9 74 10 0 974 71-125 <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> 1249 Fitzgerald Road Rancho Cordova,CA 95742 www californialab com 916-638-7301 Fax 916-638-4510 <br />