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w STL Submission# 2004-01-0011 <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geosclence <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 12/31/2003 16 05 <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#2004101109-1 D.66 <br /> LCs 2004/01109-1 D 66-000 Extracted 01/0912004 Analyzed- 01/091200410.00 <br /> LCSD 2004/01109-1 D 66-024 Extracted 0110912004 Analyzed 01/0912004 1024 <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) 233 239 25 932 956 25 65-165 20 <br /> Benzene 221 235 25 884 94 0 61 69-129 20 <br /> Toluene 229 246 25 91 6 984 72 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 462 462 500 924 924 76-114 <br /> Toluene-d8 471 484 500 942 96 8 88-110 <br /> Severn Trent Laboratories, Inc 0111212004 18 20 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton CA 94566 <br /> npat aSs rrwdPlc Tel 926 484 1919 Fax 925 484 1096"www stl-inc com"CA DHS FLAP#2496 Page 26 of 29 <br />