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7] Submission #: 2002-03-0524 <br /> Gas/BTEX by 8015M18021 <br /> Batch QC report <br /> - S7L San Francisco <br /> L. <br /> 3' Test Method: 8021B Prep Method: 5035 1220 quarry Lane <br /> Pleasanton,CA 94566 <br /> Laboratory Control Spike (LCS/LCSD) Soil QC Batch#2002103129-01.03 Tel 925 484 1919 <br /> 1096 <br /> LCS: 2002103129-01.03-002 Extracted: 03/29/2002 11:28 Analyzed: 03/29/2002 11:28 Fax 925 484 orn <br /> www.stl inc.cm <br /> LCSD: 2002103/29-01.03-003 Extracted: 031291200211:58 Analyzed: 031291200211:58 www.chromalab.com <br /> CA DHS FLAP#1094 <br /> Compound Conc.tmg[Kg] Exp.Conc.[mg/Kg] Recovery RPD Ctri.Limlts]%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recover RPD LCS LCSD <br /> Benzene 0.0986 0.0966 0.100D 0.1000 98.6 96.6 2.0 77123 35 <br /> Toluene 0.0978 0.0959 0.1000 0,1000 97,8 95.9 2.0 78-122 35 <br /> Ethyl benzene 0.0992 0.0997 0.1000 0.1000 99.2 99.7 0.5 70-130 35 <br /> Xylene(s) 0.292 0.293 0,300 0.300 97.3 97.7 0.4 75-125 35 <br /> Surrogate(s) <br /> TrlFluorotoluene 548 499 500 500 109.5 99.8 53-125 <br /> -i <br /> 'f <br /> r <br /> STL San Francisco is a part of Severn Trent Laboratories,Inc. Page 15 of 21 <br /> j <br /> a <br />