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CALIFORNIA LABORATORY SERVICES <br /> 02/27/04 11:38 <br /> ENSR-Sacramento Project: Former Unocal 0187,437E LS orkv(�rderc#t�643 <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 /> GasBTEX by GC PID/FID - Quality Control <br /> Reporting Spike Source %REC RPD <br /> nalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch CN01408-EPA 5030 Water GC <br /> Blank(CN01408-BLKI) Prepared&Analyzed: 02/19/04 <br /> nasoline ND 50 pg/L <br /> Benzene ND 0.50 " <br /> oluene ND 0.50 <br /> thylbenzene ND 0.50 " <br /> Xylenes(total) ND I.0 " <br /> UrSrogale:o-Chlorololuene(Gas) 21.0 20.0 110 65-135 <br /> (CN01408-BSI) Prepared&Analyzed:02/19/04 <br /> Gasoline 488 50 gg/L 500 97.6 65-135 <br /> Wale:o-Chlorololuene(Gas) 213 20.0 106 65-135 <br /> L —lmp(CN01408-BSD1) Prepared&Analyzed: 02/19/04 <br /> mg asoline 481 50 pg/L 500 96.2 65-135 1.44 30 <br /> urrogale:o-Chlorotoluene(Gas) 21.1 11 20.0 106 65-135 <br /> Matrix Spike(CN01408-MS1) Source: CNB0643-01 Prepared&Analyzed:02/19/04 <br /> ff asoline 475 50 gg/L 500 ND 95.0 65-135 <br /> urrogale:o-Chlorololuene(Gas) 10.2 20.0 101 65-135 <br /> _.Matrix Spike Dup(CN01408-MSD1) Source: CNB0643-01 Prepared&Analyzed:02/19/04 <br /> asoline 470 50 pg/L 500 ND 94.0 65-135 1.06 30 <br /> urrogale:o-Chlorololuene(Gas) 20.3 10.0 102 65-135 <br /> Batch CN01421 - EPA 5030 Water GC <br /> lank(CN01421-BLKI) Prepared&Analyzed: 02/20/04 <br /> Gasoline ND 50 pg/L <br /> Tenzene ND 0.50 <br /> oluene ND 0.50 " <br /> Ethylbenzene ND 0,50 " <br /> ylenes(total) ND 1.0 " <br /> rrogale:o-Chlorololuene(Gas) 11.5 20.0 108 65-135 <br /> 1 <br /> CA DOHS EL,AP Accreditation/Registration Number 1233 <br /> a <br /> 49 Fitzgerald Road Rancho Cordova, CA 95742 www.californialab.com 916-638-7301 Fax.- 916-638-4510 <br />