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CALIFORNIA LABORATORY SERVICES <br /> 11/30/0413:14 <br /> ENSR-Sacramento Project: Former Unocal 0187,437 E&k WorkvC�r loc#t� 720 <br /> 10411 Old Placerville Rd., Suite 210 Project Number: 06940-325-100 ' <br /> Sacramento,CA 95827-2508 Project Manager: Ben Heningburg COC#: <br /> GasBTEX by GC PID/FID - Quality Control , <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch CN09121 -EPA 5030 Water GC <br /> Blank(CN09121-BLK1) Prepared&Analyzed: 11/23/04 ' <br /> Gasoline ND 50 pg/L <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 ' <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 1.0 " <br /> Surrogate:o-Chlorotoluene(BTEX) 21.0 20.0 105 65-135 <br /> Surrogate:o-Chlorotoluene(Gas) 17.6 20.0 88.0 65-135 <br /> LCS(CN09121-BSI) Prepared&Analyzed: 11/23/04 <br /> Gasoline 462 50 gg/L 500 92.4 65-135 ' <br /> Surrogate:o-Chlorotoluene(Gas) 19.5 20.0 97.5 65-135 <br /> LCS Dup(CN09121-BSD1) Prepared&Analyzed: 11/23/04 <br /> Gasoline 474 50 pg/L 500 94.8 65-135 2.56 30 , <br /> Surrogate:o-Chlorotoluene(Gas) 19.2 " 20.0 96.0 65-135 <br /> Matrix Spike(CN09121-MSI) Source: CNK0692-03 Prepared&Analyzed: 11/23/04 <br /> Gasoline 453 50 pg/L 500 ND 90.6 65-135 <br /> Surrogate:o-Chlorotoluene(Gas) 19.5 Ij20.0 97.5 65-135 <br /> Matrix Spike Dup(CN09121-MSD1) Source: CNK0692-03 Prepared&Analyzed: 11/23/04 <br /> Gasoline 459 50 pg/L 500 ND 91.8 65-135 1.32 30 <br /> Surrogate:o-Chlorotoluene(Gas) 19.3 20.0 96.5 65-135 <br /> CA DOHS ELAP Accreditation/Registration Number 5233 <br /> 3249 Fitzgerald Road Rancho Cordova, CA 95742 www.californialab.com 916-638-7301 Fax: 916-638-4510 ' <br />