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Submission #: 2002-04=0224 <br /> Gas/BTEXFuel Oxygenates by 82606 <br /> Batch QC report <br /> STL San Francisco <br /> Test Method: 8260FAB Prep Method: 50306 1220 quarry Lane <br /> a Pleasanton.CA 94566 <br /> Laboratory Control Spike {LCSILCSD) Water QC Batch#2002104115-01.27 Tel 925 484 1919 <br /> } LCS: 2002/04115-01.27-003 Extracted: 04/15/2002 12:30 Analyzed: 04/15/2002 12:30 Fax 925 484 1096 <br /> www,stl-inc.com <br /> LCSD: 2002104115-01.27-004 Extracted: 04/15/2002 12:57 Analyzed: 04/15/2002 12:57 www.chromalab.com <br /> CA DHS ELAP#1094 <br /> -1 <br /> Compound Conc.[ug/LJ Exp.Conc.[ug/L] Recovery RPD Clrl.Limlts[%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recover RPD LCS LCSD <br /> Benzene 18.2 18.0 25.0 25.0 72.8 72.0 1.1 69-129 20 <br /> Toluene 20,5 20.5 25.0 25.0 82.0 82.0 0.0 70-130 20 <br /> Methyl tert-butyl ether 17.1 17.1 25.0 25.0 68.4 68.4 0.0 65-165 20 <br /> Surrogate(s) <br /> { 1,2-Dichloroethane-d4 459 469 500 500 91.8 93.8 76-114 <br /> Toluene-d8 488 489 500 500 97.6 97.8 88-110 <br /> i <br /> -J <br /> I' <br /> STL San Francisco is a part of Severn Trent Laboratories,Inc. Page 19 of 21 <br />