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1 <br /> CALIFORNIA LABORATORY SERVICES <br /> i <br /> 08/30/04 09:43 <br /> ENSR-Sacramento Project: Former Unocal 0187,437 East 5 Work Ur'd loc�ct�711 <br /> 10411 Old Placerville Rd.,Suite 210 Project Number: 06940-325-100 COC 4: 1,2,3 <br /> Sacramento,CA 95827-2508 Project Manager: Ben I.Heningburg <br /> GasBTEX by GC PID/FID - Quality Control <br /> i <br /> Reporting Spike Source %REC RPD <br /> 1,analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch CN06545- EPA 5030 Water GC <br /> LCS(CN06545-BSI) Prepared&Analyzed:08/24/04 <br /> Gasoline 542 50 gg/L 500 108 65-135 <br /> Surrogate:o-Chlorotoluene(Gas) 21.6 20.0 113 65-135 <br /> 'LCS Dup(CN06545-BSD1) Prepared&Analyzed:08/24/04 <br /> Gasoline 540 50 gg/L 500 108 65-135 0.370 30 <br /> Surrogate:o-Chlorotoluene(Gas) 22,8 1120,0 114 65-135 <br /> ,Matrix Spike(CN06545-MSI) Source:CNH0711-27 Prepared&Analyzed:08/24/04 <br /> Gasoline 688 50 gg/L 500 240 89.6 65-135 <br /> r ate:o-Chlorotoluene(Gas) 22.4 20.0 112 65-135 <br /> ISU <br /> ) xSpike Dup(CN06545-MSDI) Source:CNH0711-27 Prepared& Analyzed:08/24/04 <br /> Gasoline 680 50 gg/L 500 240 88.0 65-135 1.17 30 <br /> Surrogate:o-Chlorotoluene(Gas) 21.9 20.0 110 65-135 <br /> • <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 />