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CALIFORNIA LABORATORY SERVICES i <br /> 09/30/0415:18 <br /> ENSR-Sacramento Project: Former Unocal 0187,437 Eastivlio kv�r�ercto�NI0790 <br /> 10411 Old Placerville Rd., Suite 210 Project Number: 06940-325-100 [ LS <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 CN07506-EPA 5030 Water GC <br /> Blank(CN07506-BLKI) Prepared&Analyzed:09/27/04 ' <br /> Surrogate:o-Chlorotoluene(BTEX) 20.7 lug/L 20,0 104 65-135 <br /> Surrogate:o-Chlorotoluene(Gas) 20.0 10.0 100 65-135 <br /> LCS(CN07506-BS1) Prepared&Analyzed: 09/27/04 ' <br /> Gasoline 508 50 pg/L 500 102 65-135 <br /> Surrogate:o-Chlorotoluene(Gas) 20.6 20,0 103 65-135 <br /> LCS Dnp(CN07506-BSD1) Prepared&Analyzed:09/27/04 <br /> Gasoline 524 50 pg/L 500 105 65-135 3.10 30 <br /> Surrogate:o-Chlorotoluene(Gas) 20.3 " 10.0 101 65-135 <br /> Matrix Spike(CN07506-MSI) Source:CNI0710-01 Prepared&Analyzed:09/27/04 01 <br /> Gasoline 497 50 pg/L 500 ND 99.4 65-135 <br /> Surrogate:o-Chlorotoluene(Gas) 20.4 1120.0 102 65-135 <br /> Matrix Spike Dup(CN07506-MSD1) Source: CN10710-01 Prepared&Analyzed: 09/27/04 <br /> Gasoline 497 50 pg/L 500 ND 99.4 65-135 0.00 30 <br /> Surrogate:o-Chlorotoluene(Gas) 20.3 20.0 102 65-135 <br /> Batch CN07557-EPA 5030 Water GC <br /> Blank(CN07557-BLK1) Prepared&Analyzed: 09/28/04 <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) 20.5 20.0 102 65-135 , <br /> Surrogate:o-Chlorotoluene(Gas) 20.0 10.0 100 65-135 <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 />