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Submission #: 2002-03-0492 <br /> F' Gas/BTEX by 8015M/8021 <br /> Batch QC Report <br /> STL San Francisco <br /> !� Test Method: 8021B Prep Method: 5035 1220 Quarry Lane <br /> Pleasanton,CA 94566 <br /> Matrix Spike ( MS 1 MSD ) Soil QC Batch #2002/03/29-01.03 <br /> Tel 925 484 1919 <br /> Sample ID: MW-8-5 » MS Lab ID: 2002-03-0492-001 <br /> Fax 925 484 1096 <br /> MS: 2002103129-01.03-023 Extracted:03/29/2002 22:42 Analyzed: 03/2912002 22:42 www.stl-lnc.com <br /> www.chromalab.com <br /> Dilution: 1 <br /> CA DHS ELAP#1094 <br /> MSD: 2002103129-01,03-024 Extracted:03/29/2002 23:13 Analyzed: 03/29/2002 23:13 <br /> Dilution: 1 <br /> Compound Conc.[mg/Kg] Exp.Conc. Re overy[°/a] RPD Ctrl.Llmits[%] Flags <br /> M5 MSD Sample MS MSD MS MSD [%] Recovery RPD MS MSD <br /> Benzene 0.0824 0.0815 ND 0.0967 0.0980 85.2 83.2 2.4 65-135 35 <br /> Toluene 0.0767 0.0777 ND 0.0967 0.0980 81.4 79.3 2.6 65-135 35 <br /> Ethyl benzene 0.0759 0.0752 ND 0.0967 0.0980 78.5 76.7 2,3 65-135 35 <br /> Xylene(s) 0.222 0.220 ND 0.3 0.294 74.0 74.8 1.1 65-135 35 <br /> Surrogate(s) <br /> 1 Trifluorotoluene 423 403 500 500 84.6 80.6 53-125 <br /> =r t <br /> ;i <br /> _ I <br /> STL San Francisco is a part of Severn Trent Laboratories,Inc. Page 12 of 13 <br /> i <br />