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S T L <br /> Submission: 2005-03-0360 <br /> • Gas/BTEX Fuel Oxygenates by 8260B (U-C12) <br /> Cambria Environmental Sonoma <br /> Attn Joe Neely <br /> 270 Perkins Street <br /> Sonoma, CA 95476 <br /> Phone (707) 933-2361 Fax (707)935-6649 <br /> Project 247-1661-006 Received 03/08/2005 10 10 <br /> 97471967 <br /> Site 2375 West Grant Line Road, Tracy, CA <br /> Batch QC Report <br /> Prep(s). 50306 _ _ _ - _ Test(s),t26013 <br /> Laboratory Control Spikes $oil QC Batch#.2005103119-1A 62 <br /> LCS 2005103119-1A.62-018 Extracted, 03/19/2005 _ Analyzed 03/19/2005 0818 <br /> LCSD <br /> Compound Cone mg/Kg Exp Cone Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 00401 005 802 65-165 20 <br /> • Benzene 00458 005 91 6 69-129 20 <br /> Toluene 00475 005 950 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 462 500 924 76-124 <br /> Toluene-d8 512 500 1024 75-116 <br /> s <br /> I <br /> Severn Trent Laboratories, Inc 03/23/2005 1145 <br /> STL San Francisco*1220 Quarry Lane,Pleasanton,CA 94566 <br /> A part or Smm Tron[Plc Tel 925 484 1919 Fax 925 484 1096'www stl-inc com"CA DHS ELAP#2496 Page 14 of 19 <br />