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From:STL ChromaLab To: Dai Watkins Date:12/21101 Time:8:02:20 PM Fax Page 25 of 43 <br /> Submission#: 2009-12-0252 <br /> Fuel Oxygenates by 8260B <br /> Batch QC report <br /> STL Chromalab <br /> Test Method: 8280B Prep Method: 5030B 1220 Quarry Lane <br /> Pleasanton,CA 94666 <br /> Laboratory Control Spike(LCS/LCSD) Water QC Batch#2001112118-01.27 Tel 925 484 1910 <br /> Analyzed: Fax 925 4134 1096 <br /> LCS: 2001112118-01.27-004 Extracted: 121181200113:46 121181200113:46 www.stl-Inc.com <br /> LCSD: 2001112118-01.27-005 Extracted: 121181200114:15 Analyzed: 121181200114:15 www.cnromalab.com <br /> CA DHS ELAP#1094 <br /> Compound Conc,[uglL] Exp.Conc.[uglL] Recovery[%] RPD Ctrl.Llmlts[90] Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recovery RPD LCS LCSD <br /> Methyl tert-butyl ether 22.6 19.3 26.0 26,0 90.4 77.2 15.8 65465 20 <br /> Surmgafe(s) <br /> 1,2-Dlchloroethane-d4 509 500 60D 500 101.8 100.0 76.114 <br /> r_.I <br /> L _q1I <br /> STL Chromalab Is a part of Severn Trent Laboratories,Inc. Page 12 of 15 <br /> II <br />