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Submission #: 2002-03-0524 ' <br /> jy A <br /> Gas/BTEX by 8015M18021 <br /> Batch QC Report <br /> STL San Francisco <br /> i Test Method: 8021 B Prep Method: 5035 1220 Quarry Lane <br /> Pleasanton,CA 94566 <br /> Matrix Spike ( MS I MSD ) Soil. QC Batch#2002104102-01.03 <br /> r Tel 925 484 1919 <br /> Sample ID: MW-3A-31.5 >> MS Lab ID: 2002-03-0524-010 Fax 925 484 1096 <br /> MS: 2002104102-01.03-022 Extracted:04/02/2002 20:19 Analyzed: 04/02/2002 20:19 www.stl-inc.com <br /> www.chromalab.com <br /> Dilution: 1 <br /> CA DHS FLAP#1094 <br /> =� MSD: 2002104102-01.03-023 Extracted:04/02/2002 20:50 Analyzed: 04/02/2002 20:50 <br /> Dilution: 1 <br /> Compound Conc.[mg/Kg] Exp.Conc. Recovery[%] RPD Ctrl.Limits[%] Flags <br /> 1 MS MSD Sample MS MSD MS MSD [%] Recovery RPD MS MSD <br /> Benzene 0.0937 0.0866 ND 0.0988 0.0990 94.8 87.5 8.0 65-135 35 <br /> Toluene 0.0926 0.0862 ND 0.0988 0.0990 93.7 87.1 7.3 65-135 35 <br /> Ethyl benzene 0.0931 0.0879 ND 0.0988 0.0990 94.2 88,8 5.9 65-135 35 <br /> Xylene(s) 0.273 0.259 ND 0.300 0,297 91.0 87.2 4.3 65-135 35 <br /> 'j <br /> Surrogate(s) <br /> Trifluorotoluene 479 466 500 500 95.8 93.2 53-125 <br /> :1 <br /> I '=1 <br /> STL San Francisco is a part of Severn Trent Laboratories, Inc. Page 19 of 21 <br /> `i <br />