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- 1 <br /> CALIFORNIA LABORATORY SERVICES , <br /> 08/30/0413:02 <br /> ENSR-Sacramento Project: Former Unocal 0 187,43 7 E&S WorrM9e0rc#:tK11U622 <br /> 10411 Old Placerville Rd.,Suite 210 Project Number: 06940-325-100 <br /> COC :41064 <br /> Sacramento,CA 95827-2508 Project Manager: Ben I. Heningburg <br /> GasBTEX by GC PEDN D - Quality Control <br /> 1 <br /> Reporting Spike Source °/aREC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes ' <br /> Batch CN06486-EPA 5030 Water GC <br /> Blank(CN06486-BLKI) Prepared&Analyzed:08/20/04 <br /> Gasoline ND 50 µg/1. <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) 21.1 20.0 lob 65-135 <br /> Surrogate:o-Chlorotoluene(Gas) 20.9 20.0 104 65-135 <br /> LCS(CN06486-BS1) Prepared&Analyzed:08/20/04 <br /> Gasoline 514 50 ug/L 500 103 65-135 ' <br /> Surrogate:o-Chlorotoluene(Gas) 21.3 20.0 106 65-135 <br /> LCS Dup(CN06486-BSDI) Prepared&Analyzed:08/20/04 <br /> Gasoline 523 50 pg/L 500 105 65-135 1.74 30 1 <br /> Surrogate:o-Chlorotoluene(Gas) 20.8 10.0 104 65-135 <br /> Matrix Spike(CN06486-MSI) Source: CNH0683-01 Prepared&Analyzed:08/20/04 <br /> Gasoline 517 50 µg/1. 500 ND 103 65-135 <br /> Surrogate. o-Chlorotoluene(Gas) 21.4 1120.0 107 65-135 <br /> Matrix Spike Dup(CN06486-MSDI) Source: CNHO683-01 Prepared&Analyzed:0_8/20/04 <br /> Gasoline 526 50 µg/1. 500 ND 105 65-135 1.73 30 <br /> Surrogate:o-Chlorololuene(Gas) 21.5 20.0 108 65-135 <br /> i <br /> 1 <br /> 1 <br /> • <br /> 1 <br /> 1 <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 />