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I <br /> Submission #: 2002-04-0224 <br /> f Gas/BTEXFuel Oxygenates by 8260B <br /> f <br /> Batch QC report <br /> STL San Francisco <br /> Test Method: 8260FAB Prep Method: 5030B 1220 Quarry Lane <br /> Pleasanton,CA 94566 <br /> Laboratory Control Spike (LCSILCSD) Water QC Batch#2002/04/12-01.27 Tel 925484 1919 <br /> LCS: 2002/04/12-01.27-004 Extracted: 04/12/2002 12:00 Analyzed: 04/12/2002 12:00 Fax 925 484 1096 <br /> www.stl-inc.com <br /> LCSD: 2002104/12-01.27-005 Extracted: 04/12/2002 12:29 Analyzed: 04/12/200212:29 www,chromalab.corn <br /> CA DHS ELAP#1094 <br /> Compound Conc.[ug/L] Exp.Conc.[ug1L] Recovery RPD Ctrl,Limits[%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recover RPD LCS LCSD <br /> Benzene 18.7 18,3 25.0 25,0 74.8 73.2 2.2 69-129 20 <br /> ` Toluene 20.6 20.6 25.0 25.0 82.4 82.4 0A 70-130 20 <br /> Methyl tert-butyl ether 183 18.5 25.0 25.0 73.2 74.0 1.1 65-165 20 <br /> Surrogates) <br /> 1,2-Dichloroethane-d4 490 490 500 500 98.0 98.0 76-114 <br /> Toluene"d8 495 484 500 500 99.0 96.8 88-110 <br /> '-i <br /> I <br /> r <br /> STL San Francisco is a par[of Severn Trent Laboratories,Inc. Page 18 of 21 <br />