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® STL Submission# 2003-12-0040 <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 41050001FA20 Received 12/01/2003 17 17 <br /> Conoco Phillips#11192 <br /> Site 1403 Country Club Blvd Stockton <br /> Batch QC Relmt <br /> Prep(s) 5030E Test(s) 8260B <br /> Laboratory Control Spike Water QC Batch#2003/12109-02.62 <br /> LCS 2003/12109-02 62-023 Extracted 12/09/2003 Analyzed 12/09/2003 18 23 <br /> LCSD 2003/12109-02 62-045 Extracted 12/09/2003 Analyzed 12/09/2003 18 45 <br /> Compound Cone ug/L Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rea RPD LCS I LCSD <br /> Benzene 228 222 250 912 888 27 69-129 20 <br /> Toluene 227 233 250 908 932 26 70130 20 <br /> Methyl tent-butyl ether(MTBE) 198 214 250 792 856 78 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 468 471 500 936 942 76-114 <br /> Toluene-d8 501 471 500 11002 1942 1 88-110 <br /> Sevem Trent Laboratories, Inc 1211 W00317 29 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton,CA 94566 <br /> " ate*�P1c Tet 925 4841919 Fax 925 484 1096•www st14nc com`CA DHS FLAP#2496 Page 21 of 23 <br />