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STLSubmission#: 2002-11-0437 <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> Gettler Ryan <br /> Attn.: Deanna Harding <br /> 6747 Sierra Court Suite J <br /> Dublin, CA 94568 <br /> Phone: (925) 551-7444 Fax: (925) 551-7899 <br /> Project: 180175.80 Received: 11/20/2002 13:45 <br /> Tosco#11195 <br /> Site: 16500 South Interstate 5 <br /> Lathrop, CA <br /> Batch QC Report is <br /> Prep{s) 503QB Test{s): 82608 <br /> Laboirat0.y Control'Spike: Water QC,Batch #2002112102-01 27:..' <br /> LCS2002112102{31.27:'006 Extracted. 1210.212002 Analyzed-1-2102/200Z.446 <br /> LCSD 2002112/02 01.27-007 I`xtracted. 12/02/2002 Analyzed: 12/0212002 <br /> Compound Conc. ug/L Exp.Conc. Recovery RPD C1ri.1-imits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD,,. <br /> Methyl tert-butyl ether(MTBE) 28.4 27.9 25.0 113.6 111.6 1.8 65-165 20 <br /> Benzene 24.7 25.2 25.0 98.8 100.8 2.0 69-129 20 <br /> Toluene 24.0 24.6 25.0 96.0 98.4 2.5 70-130 20 <br /> Surrogates(s) , <br /> 1,2-Dichloroethane-d4 440 430 500 88.0 86.0 76-114 <br /> Toluene-d8 478 482 500 95.6 96.4 88-110 <br /> Severn Trent Laboratories, Inc. 12/11/2002 12:19 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton,CA 94566 <br /> A pariciGemm Trenl Plc Tel 925 484 1919 Fax 925 484 1096'www.stl-inc.com'CA DHS ELAN 2496 Page 26 of 29 <br />