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STLSubmission# 2003-12-0040 <br /> Gas/BTEX Fuel Oxygenates by 82608 <br /> TRC Alton Geoscience <br /> Attn Anju Farl'an <br /> 21 Technology Dnve <br /> Irvine, CA 92718 <br /> Phone (949) 341-7440 Fax (949)753-0111 <br /> Project 41050001FA20 Received 12/01/2003 17 17 <br /> Conoco Phillips#11192 <br /> Site 1403 Country Club Blvd Stockton <br /> Batch QC Report <br /> Prep(s) 50308 Test(sy 8260B <br /> Laboratory Control Spike Water QC Batch#2003!12/05-2B 69 <br /> LCS 2003/1=6-213 69-024 Extracted 12/0512003 Analyzed 12105/2003 18 24 <br /> LCSD 2003/12/05-26 69-042 Extracted, 12106/2003 Analyzed 12/05/2003 18 42 <br /> Compound Conc ug/L Exp Con o. Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rea RPD LCS I LCSD <br /> Benzene 234 249 25 936 996 62 69-129 20 <br /> Toluene 280 280 25 1120 1120 00 70-130 20 <br /> Methyl tart-butyl ether(MTBE) 234 245 25 936 980 461 65-165 20 <br /> surrogafes(s) <br /> 1,2-Dichloroathane-d4 435 449 500 870 898 76-114 <br /> Toluene-d8 478 508 500 95 6 1101 6 1 1 88-110 <br /> Sevem Trent Laboratories, Inc 72!11/20031729 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton CA 945M <br /> Tel 925 484 1919 Fax 925 484 1096.www stNne cam•CA DHS FLAP#2496 Page 19 of 23 <br />