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CALIFORNIA LABORATORY SERVICES <br /> 02/27/04 11:38 <br /> ENSR-Sacramento Project: Former Unocal 0187,437 E titorkvdrde ck-WA43 <br /> 10411 Old Placerville Rd.,Suite 210 Project Number: 06940-325-100 COC#: 14237,14235,14236 <br /> Sacramento,CA 95827-2508 Project Manager: Ben I.Heningburg <br /> Gas/BTEX by GC PID/FID - Quality Control <br /> Reporting Spike Source %REC RPD <br /> nalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch CN01422 -EPA 5030 Water GC <br /> Blank(CN01422-BLK1) Prepared&Analyzed:02/20/04 <br /> gasoline ND 50 µg/L <br /> Benzene ND 0.50 " <br /> (.ene ND 0.50ylb,nzene ND 0.50lenes(total) ND 1.0 " <br /> rrogate:o-Chlorotoluene(Gas) 21.9 10.0 110 65-135 <br /> CS(CN01422-BSI) Prepared&Analyzed:02/20/04 <br /> Benzene 21.2 0.50 Vg/L. 20.0 106 70-140 <br /> Oene <br /> 21.3 0.50 20.0 106 70-140 <br /> enzene 21.3 0.50 20.0 106 70-140 <br /> es(total) 60.1 1.0 60.0 100 70-140 <br /> rrogate:o-Chlorotoluene(BTEX) 20.6 20.0 103 65-135 <br /> rrogate:o-Chlorotoluene(Gas) 22.6 20.0 113 65-135 <br /> LCS Dup(CN01422-BSDI) Prepared&Analyzed:02/20/04 <br /> t <br /> nzene 21.4 0.50 µg/L 20.0 107 70-140 0.939 30 <br /> luene 21.5 0.50 20.0 108 70-140 0.935 30 <br /> Ethylbenzene 21.5 0.50 20.0 108 70-140 0.935 30 <br /> ylenes(total) 60.4 1.0 60.0 101 70-140 0.498 30 <br /> urrogale:o-Chlorotoluene(BTEX) 20.7 20.0 104 65-135 <br /> arrogate:o-Chlorotoluene(Gas) 22.5 10.0 112 65-135 <br /> atrix Spike(CN01422-MS1) Source: CNB0643-29 Prepared&Analyzed:02/20/04 <br /> enzene 21.3 0.50 µg/L 20.0 ND 106 60-140 <br /> Toluene 21.3 0.50 20.0 ND 106 60-140 <br /> thylbenzene 21.2 0.50 20.0 ND 106 60-140 <br /> ylenes(total) 59.3 1.0 60.0 ND 98.8 60-140 <br /> Surrogate:o-Chlorotoluene(BTEX) 20.7 10,0 104 65-135 <br /> arrogate:o-Chlorotoluene(Gas) 22.3 20.0 112 65-135 <br /> CA DOHS ELAP Accreditation/Registration Number 1233 l' <br /> L9 Fitzgerald Road Rancho Cordova, CA 95742 www.californialab.com 916-638-7301 Fax: 916-638-4510 <br />