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Submission 2005-04-0633 <br /> Gas/BTEXFue! Oxygenates by 8260B (High Leve!) <br /> Treadwell & Rollo-San Francisco <br /> Attn David Dixon <br /> r555 Montgomery Street Suite 1300 <br /> San Francisco, CA 94111-2554 <br /> Phone (415)955-9040 Fax (415) 955-9041 <br /> ' Protect 2597 10 Received 04/20/2005 14 00 <br /> Carando <br /> Batch QC Report__. <br /> ' Prep(s) 5030B Test(s) 8260B <br /> Laboratory Control Spike Sod QC Batch #2005105101-03 69 <br /> LCs 2005/05/01-03 69-018 Extracted 05/03/2005 Analyzed 05/03/2005 12 18 <br /> LCSD 2005/05/01-03 69-038 Extracted 05/03/2005 Analyzed 05/03/2005 12 38 <br /> ' Compound Cone ug/Kg Exp Cone Recovery% RPDJ Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % I Rec RPD LCS LCSD <br /> Benzene 7290 8750 10000 729 875 182 69-129 20 <br /> Toluene 8400 8930 10000 840 893 61 70-130 20 <br /> Methyl tert-butyl ether(MTBE) 8760 9870 10000 876 987 119 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 253 252 250 1012 1008 53-129 <br /> Toluene-d8 1253 1259 250 1012 1036 1 47-136 <br /> 1 <br /> 1 <br /> • <br /> ' Severn Trent Laboratories, Inc 05/04/2005 13 15 <br /> STL San Francisco•1220 Quarry Lane, Pleasanton CA 94566 <br /> A part of sev Trent P{c Tel 926 484 1919 Fax 925 484 1096"www stl-inc cam'CA DHS FLAP#2496 Page 5 of 6 <br />