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�IYt <br /> STL , <br /> Submission 2005-03-0925 <br /> • GasIBTEX Fuel Oxygenates by $2606 <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 410500011FA20 Received 03/25/2005 17 23 <br /> Conoco Phillips#6981 <br /> Site 4707 Pacific Ave <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 8260E <br /> Laboratory Control Spike Water QC Batch#2005/04/05-4A 69 <br /> LCS 2005104105-4A 69-010 Extracted 04/05/2005 Analyzed 04/05/2005 19 10 <br /> LCSD <br /> Compound Conc uglL Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec I RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 279 25 1116 65-165 20 <br /> • Benzene 242 25 96 8 69-129 20 <br /> Toluene 25 5 25 1020 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 440 500 88 0 73-130 <br /> Toluene-d8 465 500 93 0 81-114 <br /> Severn Trent Laboratories, Inc W v - ' - _ 04/08/2005 1635 <br /> STL San Francisco e 1220 Quarry Lane,Pleasanton CA 94566 <br /> A part of Severn Trent Plc Tel 925 484 1919 Fax 925 484 1096'www stl-inc corn a CA DHS ELAP#2496 Page 20 of 22 <br />