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STLSubmission #: 2003-05-0454 <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: 05/16/2003 13:00 <br /> Batch QC Report <br /> Prep(s): 5030 Test(s): 8021 B <br /> Matrix Spike ( MS/MSD ) Water QC Batch #2003/05/19-01.04 <br /> S2-1-051603 >> MS Lab ID: 2003-05-0454 - 002 <br /> MS: 2003/05/19-01.04-022 Extracted: 05/19/2003 Analyzed: 05/19/200317:39 <br /> Dilution: 1.00 <br /> MSD: 2003/05/19-01.04-023 Extracted: 05/19/2003 Analyzed: 05/19/200318:04 <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 114 114 ND 100.0 114.0 114.0 0.0 65-135 20 <br /> Toluene 115 116 ND 100.0 115.0 116.0 0.9 65-135 20 <br /> Ethyl benzene 115 114 ND 100.0 115.0 114.0 0.9 65-135 20 <br /> Xylene(s) 321 319 1.96 300 106.3 105.7 0.6 65-135 20 <br /> Surrogate(s) <br /> 4-Bromofluorobenzene 1546 1543 1 1 500 1 109.2 1 108.6 1 150-150 <br /> Severn Trent Laboratories, Inc. 09/05/2003 09:54 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton,CA 94566 <br /> A Part of Severn Trent Pc Tel 925 484 1919 Fax 925 484 1096'www.stl-inc.com`CA DHS ELAP#2496 Page 20 of 20 <br />