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CALIFORNIA LABORATORY SERVICES <br /> 01/10/05 08:21 <br /> ENSR-Sacramento Project: Former Unocal 0187,437 EasT MineorrAv�r�erC€{i 926 <br /> 10411 Old Placerville Rd.,Suite 210 Project Number: 06940-325-100 ' <br /> Sacramento,CA 95827-2508 Project Manager: Ben Heningburg COC#:None <br /> Gas/BTEX 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 C000058-EPA 5030 Water GC <br /> Blank(C000058-BLKl) Prepared&Analyzed:01/04/05 , <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(STEX) 21.5 20.0 108 65-135 <br /> Surrogate:o-Chlorotoluene(Gas) 18.5 20.0 92.5 65-135 <br /> LCS(CO00058-BSI) Prepared&Analyzed: 01/04/05 <br /> Gasoline 387 50 gg/€, 500 77.4 65-135 <br /> Surrogate:o-Chloratoluene(Gas) 18.7 10.0 93.5 65-135 , <br /> LCS Dup(C000058-BSD1) Prepared&Analyzed: 01/04/05 <br /> Gasoline 406 50 µg/L 500 81.2 65-135 4.79 30 <br /> Surrogate:o-Chlorotoluene(Gas) 18.7 " 20.0 93.5 65-135 <br /> Matrix Spike(C000058-MSI) Source: CNLO805-16 Prepared&Analyzed: 01/04/05 <br /> Gasoline 474 50 µg/L 500 ND 94,8 65-135 , <br /> Surrogate:o-Chlorotoluene(Gas) 18.2 1120.0 91.0 65-135 <br /> Matrix Spike Dup(CO00058-MSD1) Source:CNL0805-16 Prepared&Analyzed: 01/04/05 , <br /> Gasoline 428 50 uL / 500 ND 85.6 65-135 10.2 30 <br /> Surrogate:o-Chlorotoluene(Gas) 18.6 20.0 93.0 65-135 <br /> Batch C000103- EPA 5030 Water GC <br /> Blank(C000103-BLKI) Prepared&Analyzed: 01/05/05 <br /> Gasoline ND 50 µg/L <br /> Benzene ND 0.50 ' <br /> Toluene ND 0.50 " <br /> Erhylbenzene ND 0.50 " <br /> Xylenes(total) ND 1.0 <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova, CA 95742 www.californialab.com 926-638-7301 Fax: 916-638-4510 , <br />