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Submission P 2002-03-0551 <br /> �yy Gas/BTEX by 8015M18021 <br /> Batch QC report <br /> -- 5TL San Francisco <br /> i Test Method: 8021B Prep Method: 5030 1220 Quarry Lane <br /> ` Pleasanton,CA 94566 <br /> Laboratory Control Spike(LCS/LCSD) Water QC Batch#2002104102-01.01 Tel 925 484 1919 <br /> f LCS: 2002104102-01.01-004 Extracted: 04/02/2002 09:24 Analyzed: 04/02/2002 08:24 Fax 925 484 1096 <br /> www.r.tl-inc.com <br /> LCSD: 2002/04102-01.01-005 Extracted: 04/02/2002 09:54 Analyzed: 04/02/2002 09:54 www.chromalab.com <br /> -:t <br /> CA DHS ELAP#1094 <br /> Compound Conc.[uglL] Exp.Conc.[uglL] Recovery RPD Ctri.Limits[%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recover RPD LCS LCSD <br /> Benzene 99.6 98.1 1 D0.0 100.0 99.6 98.1 1.5 77-123 20 <br /> "+ Toluene 103 102 100.0 100.0 103.0 102.0 1.0 78-122 20 <br /> Ethyl benzene 100.0 98.8 100.0 100.0 100.0 98.6 1.2 70-130 20 <br /> 'r Xylene(s) 305 300 300 300 101.7 100.0 1.7 75-125 20 <br /> Surrogate(s) <br /> Trifluorotoluene 614 591 500 500 122.8 118.2 58-124 <br /> -'I <br /> - i <br /> r <br /> ' i <br /> STL San Francisco is a part of Severn Trent Laboratories,Inc. Page 19 of 26 <br /> I <br />