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Submission #: 2002-03-0583 <br /> Gas/BTEX by 8015M18021 <br /> {" Batch QC report <br /> STL San Francisco <br /> Test Method: 8021B Prep Method: 5035 1220 Quarry Lane <br /> Pleasanton,CA 94566 <br /> Laboratory Control Spike(LCSILCSD) Soil QC Batch##2002104104-01.01 Tel 925 484 1919 <br /> LCS: 2002104104-01.01-007 Extracted: 04/D41200210:50 Analyzed: 04/041200210.50 Fax 925 484 1096 <br /> www.stl-inc.com <br /> LCSD: 2002104104-01.01-008 Extracted: 04/041200211:20 Analyzed: 041041200211:20 www.chromalab.com <br /> CA DHS ELAP#1094 <br /> - Compound Cone.[mg/Kg] Exp.Conc.[mg/Kg] Recovery RPD Ctrl,Limits[%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recover RPD LCS LCSD <br /> Benzene 0.0971 0.0999 0.1000 0.1000 97.1 99.9 2.8 77-123 35 <br /> Toluene 0.0994 0.102 0.1000 0.1000 99.4 102.0 2.6 78-122 35 <br /> Ethyl benzene 0.0988 0.100 0.1000 0.1000 98.8 100.0 1.2 70-130 35 <br /> Xylene(s) 0.298 0.306 0.300 0.300 99.3 102.0 2.7 75-125 35 <br /> Surrogate(s) <br /> TriBuorotoluene 579 591 500 500 115.8 118.2 53-125 <br /> 'I <br /> 1 � <br /> i <br /> STL San Francisco is a part of Severn Trent Laboratories,Inc. Page 12 of 12 <br />