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STLSubmission 2005-03-0925 <br /> Gas/BTEX Fuel Oxygenates by 8260B <br /> i <br /> TRC Alton Geoscience- Irvine <br /> Attn Anju Farfan <br /> 21 Technology Drive <br /> livrne, CA 92718 <br /> Phone (949)341-7440 Fax (949)753-0111 <br /> Project 410500011FA20 Received 03/25/2005 17 23 <br /> Conoco Phillips#6981 <br /> Site 4707 Pacific Ave <br /> Batch QC Re ort <br /> Prep(s) 50308 Test(s) 8260B <br /> Laboratory Control Spike Water QC Batch#2005104105-2A 64 <br /> LCS 2005/04/05-2A 64-008 Extracted 04/05/2005 Analyzed 04/05/2005 18 08 <br /> LCSD <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rac RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 255 25 1020 65-165 20 Q <br /> Benzene 283 25 1132 69-129 20 <br /> Toluene 255 25 1020 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 523 500 1046 73-130 <br /> Toluene-d8 522 500 11044 81-114 <br /> Severn Trent Laboratories, Inc 04/08/2005 16 350 <br /> STL San Francisco"1220 Quarry Lane,Pleasanton CA 94566 <br /> A pan of Severn Trent Plc Tel 925 464 1919 Fax 925 484 1096 a www stl-inc com e CA DHS ELAP#2496 Page 19 of 22 <br />