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s <br /> i <br /> Submission #: 2002-04-0276 <br /> Gas/BTEXFuel Oxygenates by 8260B <br /> Batch QC Report <br /> STL San Francisco <br /> Test Method: 8260FAB Prep Method: 5030B 1220 quarry Lane <br /> Pleasanton,CA 94566 <br /> Matrix Spike( MS/MSD ) Water QC Batch#2002/04/17-01.27 <br /> Tel 925 484 1919 <br /> Sample ID: OW-1 >> MS <br /> Lab ID: 2002-04-0276-001 Fax 925 484 1096 <br /> MS: 2002/04/17-01.27-015 Extracted:04/17/200215:49 Analyzed: 04/17/200215:49 www.sti-inc.com <br /> www.chromalab.com <br /> Dilution: 1 <br /> CA DHS ELAP#1094 <br /> MSD: 2002/04/17-01.27-016 Extracted:04/17/200216:13 Analyzed: 04/17/200216:13 <br /> Dilution: 1 <br /> Compound Conn.[ug/L] Exp.Conc.[ug/L]Recovery[%] RPD CtrI.Limits[%] Flags <br /> MS MSD Sample MS MSD MS MSD [%] Recovery RPD MS MSD <br /> Benzene 21.7 21.3 : ND 25.0 25.0 86.8 85.2 1.9 69-129 20 <br /> Toluene 22.5 21.8 ND 25.0 25.0 90.0 87.2 3.2 70-130 20 <br /> Methyl tert-butyl 18.5 19.8 ND 25.0 25.0 74.0 79.2 6.8 65-165 20 <br /> Surrogate(s) <br /> 1,2-Dichloroethan 430 465 500 500 86.0 93.0 76-114 <br /> Toluene-d8 470 481 500 500 94.0 96.2 88-110 <br /> i <br /> I <br /> { <br /> i <br /> s <br /> r <br />[ <br /> STL San Francisco is a part of Severn Trent Laboratories.Inc. Page 6 of 6 <br />