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,f4 r�; �© Submission# 2003-12-0040 <br /> STL <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> TRC Alton Geoscience <br /> Attn Antu Farfan <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone (949) 341-7440 Fax (949) 753-0111 <br /> Protect 41050001 FA20 Received 12/01/2003 17 17 <br /> Conoco Phillips#11192 <br /> Site 1403 Country Club Blvd Stockton <br /> Batch QC Report <br /> Prep(s) 50306 Test(s) 8260B <br /> Laboratory Control Spike Water QC Batch#2003112109-02 62 <br /> LCS 2003112109-02 62-023 Extracted 12/09/2003 Analyzed 12/09/2003 18 23 <br /> LCSD 2003112109-02 62-045 Extracted 12/09/2003 Analyzed 12/09/2003 18 45 <br /> Compound Cone ug/L Exp Conc 1 Recovery% RPD Ctrl Limits% Flags <br /> LCS t-CSD LCS LCSD % Rec RPD LCS LCSD <br /> Benzene 228 222 250 912 888 27 69-129 20 <br /> Toluene 227 233 250 908 932 26 70-130 20 <br /> Methyl tert-butyl ether(MTBE) 198 21 4 25 0 79 2 856 78 65-165 20 <br /> Surrogates(s) <br /> 1 2-Dichloroethane-d4 468 471 500 936 942 76-114 <br /> Toluene-d8 501 1471 500 1002 942 88-110 <br /> Severn Trent Laboratories, Inc 12/11/2003 17 29 <br /> STL San Francisco•1220 Quarry Lane Pleasanton CA 94566 <br /> A p�a of Severn hent Pk Tel 925 484 1919 Fax 925 484 1096*www sti-inc corn*CA DHS FLAP*2496 Page 21 of 23 <br />