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CALIFORNIA. LABORATORY SERVICES <br /> 02/27/0411:38 <br /> ENSR-Sacramento Project: Former Unocal 0187,437 East I�I1ork�6rde ck!V1 &43 <br /> 10411 Old Placerville Rd.,Suite 210 Project Number: 06940-325-100 COC 4: 14237,14235,14236 <br /> Sacramento,CA 95827-2508 Project Manager: Ben 1. Heningburg <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 CNp1422- EPA 5030 Water GC <br /> Matrix Spike Dup(CN01422-MSDI) Source:CNB0643-29 Prepared&Analyzed:02/20/04 ' <br /> Benzene 21.2 0.50 pg/L 20.0 ND 106 60-140 0.471 30 <br /> Toluene 21.3 0.50 20.0 ND 106 60-140 0.00 30 <br /> Ethylbenzene 21.1 0.50 20.0 ND 106 60-140 0.473 30 , <br /> Xylenes(total) 59.2 1.0 60.0 ND 98.7 60-140 0.169 30 <br /> Surrogate:o-Chlorotoluene(BTEX) 20.5 20.0 102 65-135 <br /> Surrogate:o-Chlorotoluene(Gas) 22.5 20.0 112 65-135 <br /> Batch CN01464-EPA 5030 Water GC <br /> Blank(CN01464-BLKI) Prepared&Analyzed:02/23/04 <br /> Gasoline ND 50 µg/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-Chlorololuene(Gas) 21,6 20.0 108 65-135 <br /> LCS(CN01464-BSI) Prepared&Analyzed:02/23/04 ' <br /> Gasoline 489 50 pg/L 500 97.8 65-135 <br /> Surrogate:o-Chlorotoluene(Gas) 21.1 20.0 106 65-135 <br /> LCS Dup(CN01464-BSD!) Prepared&Analyzed:02/23/04 , <br /> Gasoline 469 50 µg/L 500 93.8 65-135 4.18 30 <br /> Surrogate:o-Chlorotoluene(Gas) 20.2 1120.0 101 65-135 ' <br /> Matrix Spike(CN01464-MSI) Source: CNB0732-01 Prepared&Analyzed: 02/23/04 <br /> Gasoline 487 50 pg/L 500 ND 97.4 65-135 <br /> Surrogate:o-Chlorotoluene(Gas) 20.7 20.0 104 65-135 ' <br /> CA DOHS FLAP Accreditation/Registration Number 1233 , <br /> 3249 Fitzgerald Road Rancho Cordova,CA 95742 www.californialab.com 916-638-7301 Fax: 916-638-4510 <br />