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CALIFORNIA LABORATORY SERVICES <br /> 08/30/04 09:43 <br /> ENSR-Sacramento Project: Former Unocal 0187,437 E oaM?de c#:t5�4711 <br /> 10411 Old Placerville Rd.,Suite 210 Project Number: 06940-325-100 COC#: 1,2, 3 <br /> Sacramento,CA 95827-2508 Project Manager: Ben 1. Heningburg <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 CN06528-EPA 5030 Water GC <br /> Blank(CN06528-BLKI) Prepared&Analyzed: 08/23/04 , <br /> Surrogate:o-Chlorotoluene(BTEX) 21.4 µg/L 20.0 107 65-135 <br /> Surrogate:o-Chlorotoluene(Gas) 20.8 20.0 104 65-135 <br /> LCS(CN06528-BSI) Prepared&Analyzed:08/23/04 , <br /> Gasoline 503 50 gg/L 500 101 65-135 <br /> Surrogate:o-Chlorotoluene(Gas) 20.4 20.0 102 65-135 <br /> LCS Dup(CN06528-BSD1) Prepared&Analyzed:08/23/04 ' <br /> Gasoline 508 50 pg/L 500 102 65-135 0.989 30 <br /> Surrogate:o-Chlorotoluene(Gas) 21.3 20.0 106 65-135 <br /> Matrix Spike(CN06528-MSI) Source: CNH0711-15 Prepared&Analyzed:08/23/04 <br /> Gasoline 500 50 pg/L 500 ND 100 65-135 <br /> Surrogate:o-Chlorotoluene(Gas) 21.3 1120.0 106 65-135 <br /> Matrix Spike Dup(CN06528-MSD1) Source: CNHO711-15 Prepared&Analyzed:08/23/04 <br /> Gasoline 519 50 pg/L 500 ND 104 65-135 3.73 30 <br /> Surrogate:a-Chlorotoluene(Gas) 21.0 20.0 105 65-135 ' <br /> Batch CN06545-EPA 5030 Water GC <br /> Blank(CN06545-BLKI) Prepared&Analyzed:08/24/04 <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) 19.9 20.0 99.5 65-135 ' <br /> Surrogate:o-Chlorotoluene(Gas) 22.0 20.0 110 65-135 <br /> • <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova, CA 95742 www.californialab.com 916-638-7301 Fax: 916-638-4510 ' <br />