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STLSubmission 2005-04-0633 <br /> Fuel Oxygenates by 82608 <br /> Treadwell & Rolla-5an Francisco <br /> Attn David Dixon <br /> i555 Montgomery Street Suite 1300 <br /> San Francisco, CA 94111-2554 <br /> i Rhone (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) 50308 Test(s) 82606 <br /> Laboratory Control Spike Soil QC Batch #2005104128-03 62 <br /> LCS 2005/04/28-03 62-039 Extracted 04/28/2005 Analyzed 04/28/2005 18 39 <br /> LCSD <br /> Compound Conc ug/Kg Exp Conc. Recovery% RPD Ctrl Limits %I Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 53 0 500 1060 65-165 20 <br /> Benzene 633 500 1266 69-129 20 <br /> Toluene 64 4 500 1288 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 546 500 1092 72-124 <br /> Toluene-d$ 516 1 500 1032 75-116 <br /> 1 <br /> I <br /> I <br /> I <br /> ' Severn Trent Laboratories, Inc 05/04/200513 06 <br /> STL San Francisco'1220 Quarry Lane Pleasanton,CA 94666 <br /> A"INA Tml Pic Tel 125 484 1919 Fax 925 4114 1096`www sthnc corn`CA t7FIS FLAP#2496 Page 12 of 15 <br />