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CALIFORNIA LABORATORY SERVICES , <br /> 11/30/04 13:17 , <br /> ENSR-Sacramento Project: Former Unocal 0187,437 EFwe01&6 derCk!ZQ709 <br /> 10411 Old Placerville Rd.,Suite 210 Project Number: 06940-325-100 ' <br /> Sacramento,CA 95827-2508 Project Manager: Ben Heningburg COC#: 1,2, 3 <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 CN09090-EPA 5030 Water GC <br /> Blank(CN09090-BLKI) Prepared&Analyzed: 11/22/04 , <br /> Surrogate:o-Chlorololuene(BTEX) 21.2 A191L 10.0 106 65-135 <br /> Surrogate:o-Chlorololuene(Gas) 20.1 20.0 100 6S-135 <br /> LCS(CN09090-BSI) Prepared&Analyzed: 11/22/04 <br /> Gasoline 479 50 pg/L 500 95.8 65-135 <br /> Surrogate:o-Chlorololuene(Gas) 20.3 20.0 102 65-135 <br /> LCS Dup(CN09090-BSDI) Prepared&Analyzed: 11/22/04 ' <br /> Gasoline 462 50 gg/L 500 92.4 65-135 3.61 30 <br /> Surrogate:o-Chlorotoluene(Gas) 20.5 " 20.0 102 65-135 <br /> Matrix Spike(CN09090-MSI) Source: CNK0709-24 Prepared&Analyzed: 11/22/04 <br /> Gasoline 441 50 1 0' 500 ND 88.2 65-135 <br /> Surrogate:o-Chlorotoluene(Gas) 20.0 1. 20.0 100 65-135 ' <br /> Matrix Spike Dup(CN09090-MSDI) Source: CNK0709-24 Prepared&Analyzed: 11/22/04 <br /> Gasoline 467 50 gg/L 500 ND 93.4 65-135 5.73 30 <br /> Surrogate:o-Chlorotoluene(Gas) 20.1 10.0 100 65-135 ' <br /> Batch CN09099-EPA 5030 Water GC <br /> Blank(CN09099-BLKI) Prepared&Analyzed: 11/22/04 ' <br /> Gasoline ND 50 lig/1. <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) 20.9 20.0 104 65-135 <br /> Surrogate:o-Chlorotoluene(Gas) 18.8 10.0 94.0 65-135 ' <br /> • <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova, CA 95742 www.californialab.com 91.6-638-7301 Fax: 916-638-4510 , <br />