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STLSubmission #: 2003-06-0042 <br /> 8021 B-BTEX <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: 06/02/2003 18:25 <br /> 7243.011 <br /> Batch QC Report <br /> Prep(s): 5030 Test(s): 8021 B <br /> Matrix Spike ( MS/MSD ) Water QC Batch #2003/06/03-01.04 <br /> S1-1-060203 >> MS Lab ID: 2003-06-0042 - 002 <br /> MS: 2003/06/03-01.04-016 Extracted: 06/03/2003 Analyzed: 06/03/200314:27 <br /> Dilution: 1.00 <br /> MSD: 2003/06/03-01.04-017 Extracted: 06/03/2003 Analyzed: 06/03/200314:51 <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 98.9 109 ND 100.0 98.9 109.0 9.7 65-135 20 <br /> Toluene 99.2 109 ND 100.0 99.2 109.0 9.4 65-135 20 <br /> Ethyl benzene 97.6 107 ND 100.0 97.6 107.0 9.2 65-135 20 <br /> Xylene(s) 276 302 ND 300 92.0 100.7 9.0 65-135 20 <br /> Surrogate(s) <br /> 4-Bromofluorobenzene 1484 1495 1 1 500 196.8 199.0 1 150-150 <br /> Severn Trent Laboratories, Inc. 06/04/200313:05 <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 10 of 10 <br />