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Sr a iw Submission# 2004-03-0366 <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geoscience <br /> Attn Anlu 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) 5030B Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch #2004103119-2A 65 <br /> LCS 2004103119-2A 65-008 Extracted 03/19/2004 Analyzed 03/19/2004 18 08 <br /> LCSD 2004103119-2A 65-033 Extracted 03/1912004 Analyzed 03/19/2004 18 33 <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) 21 5 195 25 860 780 98 65-165 20 <br /> Benzene 252 234 25 1008 936 74 69-129 20 <br /> Toluene 24 3 227 25 97 2 908 6 8 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 433 395 500 86 6 790 76-114 <br /> Toluene-d8 461 452 500 1922 904 1 188-1101 <br /> Severn Trent Laboratories, Inc 03!2912004 1910 <br /> STL San Francisco'1220 Quarry Lane Pleasanton CA 94566 <br /> A pan or Severn Trent PIC Tel 925 484 1919 Fax 925 484 1096`www stl-inc com'CA DHS ELAP#2496 Page 14 of 16 <br />