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•1 � <br /> S .1 L <br /> Submission 2005-03-0010 <br /> Gas1BTEX Fuel Oxygenates by 82608 <br /> TRC Alton Geoscience- Irvine <br /> Attn Anju Farfan <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone (949) 341-7440 Fax (949)753-0111 <br /> Project 41050001 FA20 Received 02/28/2005 15 05 <br /> Conoco Phillips# 11192 <br /> Site 1403 Country Club Blvd Stockton <br /> Batch QC Report <br /> Prep(s) 50306 Test(s) 82608 <br /> Laboratory Control Spike Water QC Batch #2005103/0 9-1B 62 <br /> LCS 2005103109-1 B 62-037 EWacted 03/09/2005 Analyzed 03/09/2005 18 09 <br /> LCSD <br /> Compound Conc uglL Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> . Methyl tent-butyl ether(MTBE) 173 25 692 65-165 20 <br /> Benzene 21 1 25 844 69-129 20 <br /> Toluene 228 25 91 2 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 448 500 89 6 73-130 <br /> Toluene-d8 494 500 988 81-114 <br /> Severn Trent Laboratories, Inc 03115/2005 09 29 <br /> STL San Francisco*1220 Quarry Lane Pleasanton,CA 94566 <br /> A panaf SammTrent Plc Tel 925 484 1919 Fax 925 484 1096*www sti-inc com*CA DHS ELAP#2496 Page 25 of 35 <br />