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Submission #: 2002-03-0551 <br /> E"! Gas/BTEX Compounds (High Level) <br /> Batch QC report <br /> - STI.San Francisco <br /> Test Method: 8015M Prep Method: 5030 1220 Quarry Lane <br /> 8021 B Pleasanton,CA 94566 <br /> is Laboratory Control Spike (LCS/LCSD) Soil QC Batch# 2002104104-05.03 Tel 925 484 1 919 <br /> r Fax 925 484 1 096 <br /> LCS: 2002104104-05.03-002 Extracted: 041041200211:23 Analyzed: 041041200211:23 www.atl-inc.corn.com hromalab ab.com <br /> LCSD: 2002104/04-05.03-003 Extracted: 04/04/2002 11:53 Analyzed: 04/04/2002 11:53 <br /> CA DHS ELAP#1094 <br /> i <br /> Compound Conc.[mg/Kg] Exp.Conc.[mg/Kg] Recovery RPD Ctrl.Limits[%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recover RPD LCS LCSD <br /> Gasoline 0.685 0.678 0.625 0.625 106.4 108.5 2.0 75125 35 <br /> Benzene 0.124 0.127 0.125 0.125 99.2 101.6 2.4 77-123 35 <br /> Toluene 0.123 0.127 0.125 0.125 98.4 101.6 3.2 78.122 35 <br /> Ethyl benzene 0.123 0.127 0,125 0.125 98.4 101.6 3.2 70-130 35 <br /> Xylene(s) 0.378 0.386 0.375 0.375 100.6 102.9 2.1 75-125 35 <br /> Surrogate(s) <br /> Trifluorotoluene 98,2 99.5 100 100 98.2 99.5 53-125 0 <br /> 4-Bromofluorobenzene 82.8 84.2 100 100 82.8 84.2 58-124 0 <br /> . f5 <br /> c-:-i <br /> s� <br /> 1}5_; <br /> I >1 <br /> f <br /> :I <br /> STL San Francisco is a part of Severn Trent Laboratories,Inc. Page 4 of 5 <br />