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Submission #: 2002-03-0551 <br /> F% <br /> Err Gas/BTEX by 8015M/8021 <br /> Batch QC report <br /> STL San Francisco <br /> { Test Method: 8021 B Prep Method: 5035 1220 quarry Lane <br /> Pleasanton,CA 94566 <br /> .. Laboratory Control Spike (LCSILCSD) Soil QC Batch#2002/04103-01.03 Tel 925 464 1919 <br /> LCS: 2002104103-01,03-002 Extracted, 04/03/2002 09:05 Analyzed: 04/03/2002 09:05 Fax 925484 [096 <br /> =a www.stl-lnc.com <br /> LCSD: 2002/04/03-01.03-003 Extracted: 04/03/2002 09:35 Analyzed: 04/03/2002 09:35 www.chromalab.com <br /> j CA DNS FLAP#1094 <br /> Compound Conc.[mg/Kg] Exp,Conc,[mglKg] Recovery RPD Ctrl.Umits[%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recover RPD LCS LCSD <br /> Benzene 0.0919 0.0862 0.1000 0.1000 91.9 86.2 6,4 77-123 35 <br /> =f Toluene 0.0906 0.0853 0.1000 0.1000 90.6 85.3 6.0 78-122 35 <br /> Ethyl benzene 0.0898 0.0851 0.1000 0.1000 89.8 85.1 5.4 70-130 35 <br /> Xylene(s) 0.266 0.253 0.300 0.300 88.7 64.3 5.1 75-125 35 <br /> Surrogate(s) <br /> :. TriFluorotoluene 474 437 500 500 94.8 87,4 53-125 <br /> s..l <br /> STL San Francisco Is a part of Severn Trent Laboratories,Inc. Page 21 of 26 <br />