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STLSubmission: 2005-10-0515 <br /> Gas/BTEX Fuel Oxygenates by 82608 <br /> TRC Alton Geoscience- Irvine <br /> Attn.:Anju Farfan <br /> i <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone: (949)341-7440 Fax: (949)753-0111 <br /> Project: 410500011FA20 Received: 10/25/2005 16:05 <br /> Conoco Phillips#11195 <br /> Site: 16500 S. Interstate 5, Lathrop, CA <br /> Batch QC Report <br /> Prep(s): 5030B Test(s):82606: <br /> F <br /> Laboratory Control Spike Water QC,Batch#2005110129-1A,71 <br /> k <br /> LCS 20051101291A.71-017 Extraeted: 10/29/2005 Analyzed- 10/29/2005.1.117: <br /> .LCSD 2005!10129lA.71-044 Extracted 10/29/2005 Analyzed: 10/29/2005 11-44 <br /> Compound Conc, ug1L Exp.Conc. Recovery% RPD Ctrl-Limits% Flags <br /> E <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Methyl tent-butyl ether(MTBE) 22.0 20.5 25 88.0 82.0 7.1 65-165 20 <br /> Benzene 24.5 22.8 25 98.0 91.2 7.2 69-129 20 <br /> k - J Toluene 24.4 22.7 25 97.6 90.8 7.2 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 440 471 500 88.0 94.2 73-130 <br /> Toluene-d8 515 559 500 103.0 111.8 81-114 <br /> F. <br /> f: <br /> F: <br /> F: <br /> r- <br /> F: <br /> r. <br /> F; <br /> r <br /> F: <br /> G; <br /> } Severn Trent Laboratories, Inc. M31/2005 15:29 <br /> i <br /> STL San Francisco*1220 Qua"Lane,Pleasanton,CA 94566 <br /> Apart of Severn Trent Plc <br /> Tel 925 484 1919 Fax 925 484 1096*www.stl-inc-com*CA DHS FLAP#2496 Page 31 of 37 k` <br />