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E� <br /> Submission #: 2001-11-0604 <br /> Gas/BTEXFuel Oxygenates by 82608 <br /> Batch QC report <br /> STL Chromalab <br /> Test Method: 8260FAB Prep Method: 5030E 1220 Quarry Lane <br /> Pleasanton,CA 94566 <br /> Laboratory Control Spike(LCS/LCSD) Water QC Batch#2001112/06-01.27 Tel 925 484 1919 <br /> Fax 925 484 1096 <br /> LCS: 2001112/06-01.27-003 Extracted: 12/061200110:40 Analyzed: 121061200110:40 www.stl-inc.com <br /> LCSD: 2001112106-01.27-004 Extracted: 121061200111:09 Analyzed: 121061200111:09 www.chromalab.com <br /> CA DHS ELAP#1094 <br /> r r <br /> i <br /> Compound Conc.[ug/Ll Exp.Conc.[ug/L] Recovery[%] RPD Ctrl.Limits[%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%} Recovery RPD LCS LCSD <br /> c� Benzene 21.7 21.6 25.0 25.0 86.8 86.4 0.5 69-129 20 <br /> Toluene 22.7 22.5 25.0 25.0 90.8 90.0 0.9 70-130 20 <br /> Methyl tert-butyl ether 22.8 20.6 25.0 25.0 91.2 82.4 10.1 65-165 20 <br /> Surrogate(s) <br /> 1,2-Dichloroethane-d4 555 511 500 500 111.0 102.2 76-114 <br /> Toluene-d8 492 484 500 500 98.4 96.8 88-110 <br /> r <br /> STL Chromalab is a part of Severn Trent Laboratories,Inc. Page 15 of 16 <br />