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Submission#: 2002-06-0452 aw 04 tw® <br /> Fuel Oxygenates by 82608 <br /> Wright Environmental Services Inc STL San Francisco <br /> 1220 Quarry Lane <br /> Attn.: Maria Reid Pleasanton,CA 94566 <br /> 67 E 10th Street <br /> Tracy, CA 95376-4001 Tel:(925)484-1919 <br /> Phone: (209) 833-0758 Fax: (209) 832-5152 Fax:(925)484-1096 <br /> www.stl-inc.com <br /> Project: M&M Builders Received: 06/25/2002 13:45 www.chromalab.com <br /> Site: 8111 W. 11th Street, Tracy, CA <br /> CA DHS ELAP#2496 <br /> I ' <br /> Batch QC Report <br /> Prep(s): 5030B Test(s): 8260FAB <br /> Laboratory Control Spike Water QC Batch#2002/06/28-01.62 <br /> s LCS 2002/06/28-01.62-026 Extracted: 06/28/2002 Analyzed: 06/28/200211:26 <br /> LCSD 2002/06/28-01.62-049 Extracted: 06/28/2002 Analyzed: 06/28/200211:49 <br /> Compound Conc. ug/L Exp.Conc. Recovery RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Benzene 24.4 25.0 25.0 97.6 100.0 2.4 69-129 20 <br /> Toluene 25.5 25.7 25.0 102.0 102.8 0.8 70-130 20 <br /> Methyl tert-butyl ether(MTBE) 29.4 26.9 25.0 117.6 107.6 8.9 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 497 476 500 99.4 95.2 76-114 <br />+ Toluene-d8 497 496 500 99.4 99.2 88-110 <br /> 1 <br /> I <br /> i <br /> 07/01/2002 11:56 STL San Francisco is part of Severn Trent Laboratories.Inc. Page 6 of 6 <br />