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Submission #: 2002-05-0515 <br /> Gas/BTEXFuel Oxygenates by 82606 <br /> Batch QC report <br /> 571.San Francisco <br /> Test Method: 82606 Prep Method: 50306 1220 Quarry Lane <br /> Pleasanton,CA 94566 <br /> Laboratory Control Spike (LCS/LCSD) Water QC Batch#2002106104-01.27 Tel 925 484 1919 <br /> 4 1096 <br /> LCS: 2002106104-01.27-003 Extracted: 061041200211:10 Analyzed: 061041200211:10 wax92546.corn <br /> www.stl-inc.com <br /> LCSD: 2002106104-01.27-004 Extracted: 061041200211:38 Analyzed: 06/041200211:38 www.chromalab.com <br /> CA DHS ELAP*2496 <br /> Compound Conc.[ug/L] Exp.Conc.[ug]L] Recovery RPD Ctrl.Limits Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recover RPD <br /> LCS LCSD <br /> Methyl tert-butyl ether 17.4 16.8 25.0 25.0 69.6 67.2 3.5 65-165 20 <br /> Benzene 20.7 20.9 25.0 25.0 82.8 83.6 1.0 69-129 20 <br /> Toluene 23.6 23.2 25.0 25.0 94.4 92.8 1.7 70-130 20 <br /> ' Surrogate(s) <br /> 1,2-Dichloroethane-d4 517 507 500 500 103.4 101.4 76-114 <br /> ' Toluene-d8 510 508 500 500 102.0 101.5 88-110 <br /> STL San Francisco is a part of Severn Trent Laboratories,Inc. Page 10 Of 12 <br />