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CALIFORNIA LABORATORY SERVICES <br /> 07/20/05 15 54 ' <br /> ENSR-Sacramento Project Fortner Unocal 5098,5400&*or'Wdr cV9n6iOG0409 <br /> 10411 Old Placerville Rd,Suite 210 Project Number 06940-293-120 COC# 40543 ' <br /> Sacramento,CA 95827-2508 Project Manager Katie Hickltng <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 /> Batch C005390-EPA 5030 Soil MS <br /> Blank(CO05390-BLK1) Prepared&Analyzed 07/18/05 , <br /> Di-isopropyl ether ND 50 µg&g <br /> Ethyl tert-butyl ether ND 50 " <br /> Methyl tert-butyl ether ND 50 ' <br /> tert-Amyl methyl ether ND 50 " <br /> Tert-butyl alcohol ND 50 " <br /> 12-Dibromoethane(EDB) ND 50 " <br /> 1,2-Dichloroethane ND so , <br /> Benzene ND 5 0 " <br /> Ethylbenzene ND 50 " <br /> Toluene ND 5 0 <br /> Xylenes(total) ND 10 " <br /> Surrogate Toluene-d8 511 Soo 101 60-140 <br /> LCS(CO05390-BSI) Prepared&Analyzed 07/18/05 ' <br /> Methyl tert-butyl ether 455 5 0 #g/kg 500 910 60-140 <br /> Surrogate Toluene-d8 508 500 102 60-140 <br /> LCS Dup(CO05390-BSD1) Prepared&Analyzed 07/18/05 ' <br /> Methyl tert-butyl ether 392 50 pgAg 500 78 4 60-140 149 30 <br /> Surrogate Toluene-d8 51 7 500 103 60-140 <br /> e <br /> • <br /> t <br /> CA DOHS FLAP Accreditation/Registration Number 1233 , <br /> 3249 Fitzgerald Road Rancho Cordova, CA 95742 www.californislab.com 916-638-7301 Fax: 916-638-4510 <br />