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STLSubmission: 2005-02-0540 <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geoscience- Irvine <br /> Attn.: Anju Farfan <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone: (949) 341-7440 Fax: (949) 753-0111 <br /> Project: 41050001 FA20 Received: 02/16/2005 12:18 <br /> Conoco Phillips# 11195 <br /> Site: 16500 S. Interstate 5 Lathrop <br /> Batch QC Report <br /> Prep(s): 50308 Test(s):.826013 <br /> Laboratory.Control.Spike Water QC'Batch#2005102128-1A.64 <br /> LCS 2005102128-1A.64-030 Extracted:02/28/2005 Analyzed: 021281200.5 08:30 <br /> LCSD <br /> Compound Conc, ug/L Exp.Conc. Recovery% RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 24.4 25 97.6 65-165 20 <br /> Benzene 25.6 25 102.4 69-129 20 <br /> Toluene 27.0 25 108.0 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 498 500 99.6 73-130 <br /> Toluene-d8 514 500 102.8 1 81-114 <br /> Severn Trent Laboratories, Inc. 03/02/2005 17:58 <br /> STL San Francisco`1220 Quarry Lane,Pleasanton,CA 94566 <br /> A part or seven Yrenl Plc Tel 925 484 1919 Fax 925 484 1096'www,stl-inc.com`CA DHS ELAP#2496 Page 28 of 36 <br />