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CALIFORNIA LABORATORY SERVICES <br /> 08/03/04 10 27 <br /> ENSR-Sacramento Project Former Unocal 5098,5606��cf reQrater 'CNG0820 <br /> 10411 Old Placerville Rd, Suite 210 Project Number 06940-293-100 COC# 1,2 <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 /> analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch CN05774-EPA 5030 Water MS <br /> LC5 Dup(CN05774-BSDI) Prepared&Analyzed 07/23/04 <br /> Batch CN05811 -EPA 5030 Water MS <br /> Blank(CN05811-BLKI) Prepared&Analyzed 07/26/04 <br /> Acetone ND 10 pg/L <br /> Benzene ND 050 " <br /> Bromobenzene ND 050 <br /> Bromochloromahanc ND 050 " <br /> Bromodichloromethane ND 050 " <br /> Bromoform ND 050 <br /> Bromomethane ND 10 " <br /> 2-Butanone ND 10 " <br /> n-Butylbenzene ND 050 <br /> sec-Butylbenzene ND 050 " <br /> — tert-Butylbenzene ND 050- <br /> Carbon <br /> 50-Carbon tetrachloride ND 050 " <br /> Chlorobenzene-- —------- -- - ---=ND-- —0 50 — — -_— — - -- --—— -- —-- - ---� <br /> Chloroethane ND 050 " <br /> - - Chloroform-- - - --- ------ - --- -- -ND- <br /> Chloromethane ND 10 <br /> o-Chlorotoluene ND 050 " <br /> u- p-Chlorotoluene- ND 050 - - - - <br /> Dibromochloromethane ND 050 ' <br /> 12-Dibromo-3-chloropropane ND 10 " <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> Dibromomethane ND 050 " <br /> 1,2-Dichlorobenzene ND 050 ' <br /> 1,3-Dichlorobenzene ND 050 " <br /> 1,4-Dichlorobenzene ND 050 " <br /> Dichlorodifluoromethane(Freon 12) ND 10 <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova, CA 95742 www californialab cam 916-638-7301 Fax 916-638-4510 <br />