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Submission # 2004-03-0365 <br /> I <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geoscience <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 03/10/2004 17 20 <br /> Conoco Phillips# 6981 <br /> Site 4707 Pacific Ave Stockton <br /> Batch QC Report <br /> Prep(s) 50306 Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch#2004103118-2A 64 <br /> LCS 2004/03118-2A 64-038 Extracted 03/18/2004 Analyzed 03/18/2004 17 38 <br /> LCSD 2004103/18-2A 64-000 Extracted 03/18/2004 Analyzed 03/18/2004 18 00 <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) 236 233 25 944 932 1 3 65-165 20 <br /> Benzene 240 236 25 96 0 944 1 7 69-129 20 <br /> Toluene 24 2 25 3 25 968 1012 4 4 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 473 475 500 94 6 950 76-114 <br /> Toluene-d8 471 479 504 94 2 1958 1 1 88-110 <br /> Severn Trent Laboratories, Inc 0312412004 16 56 <br /> STL San Francisco'1224 Quarry Lane Pleasanton CA 94566 <br /> A part of Severn Trent Plc Tel 925 484 1919 Fax 925 484 1096'www stl-fnc corn.CA DHS FLAP*2496 Page 13 of 16 <br />