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STLSubmission #: 2003-06-0351 <br /> Gas/BTEX Compounds by 8015M/8021 <br /> Geomatrix Consultants <br /> Attn.: Martin Bloes <br /> 2101 Webster St.,12 th Floor <br /> Oakland, CA 94612 <br /> Phone: (510) 663-4148 Fax: (510) 663-4141 <br /> Project: 7243.011 Received: 06/11/2003 15:50 <br /> 7243.011 C <br /> Batch QC Report <br /> Prep(s): 5030 Test(s): 8021 B <br /> Matrix Spike ( MS/MSD ) Water QC Batch #2003/06/12-01.04 <br /> S3-5-061103 >> MS Lab ID: 2003-06-0351 - 005 <br /> MS: 2003/06/12-01.04-031 Extracted: 06/12/2003 Analyzed: 06/12/200319:56 <br /> Dilution: 1.00 <br /> MSD: 2003/06/12-01.04-032 Extracted: 06/12/2003 Analyzed: 06/12/2003 20:20 <br /> Dilution: 1.00 <br /> Compound Conc. ug/L Spk.Level Recovery% Limits% Flags <br /> MS MSD Sample ug/L MS MSD RPD Rec. RPD MS MSD <br /> Benzene 102 102 ND 100.0 102.0 102.0 0.0 65-135 20 <br /> Toluene 103 103 ND 100.0 103.0 103.0 0.0 65-135 20 <br /> Ethyl benzene 103 101 ND 100.0 103.0 101.0 2.0 65-135 20 <br /> Xylene(s) 286 286 ND 300 95.3 95.3 0.0 65-135 20 <br /> Surrogate(s) <br /> Trifluorotoluene 1579 1584 1 1 500 1115.8 1116.8 1 158-124 <br /> Severn Trent Laboratories, Inc. 06/13/200310:33 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton,CA 94566 <br /> A part of Severn Trent Pic Tel 925 484 1919 Fax 925 484 1096'www.stl-inc.com`CA DHS ELAP#2496 Page 7 of 7 <br />