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I <br /> NO 04 S T T Submission: 2004-07-0269 <br /> Gas/BTEX/MTBE by 8260B <br /> SECOR-Sacramento <br /> Attn.:Amy Draffan <br /> 3017 Kllgore Road, Suite 100 <br /> Rancho Cordova, CA 95670 <br /> Phone: (916)861-0400 Fax: (916)861-0430 <br /> Project: Conoco Philips Site#11195 Received: 07/08/2004 10:50 <br /> Site: 16500 Louise Ave, Lathrop <br /> Batch QC Report <br /> Prep(s): .5030$ Test(s): 8260E <br /> Laboratory Control Spike Water QC Batch#2004107115-21j.62 <br /> LCS 2004107115-2D.62-054 Extracted;:07/15/2004 Analyzed: 07115/20041.4:54 <br /> LCSD. 2004107115-2D.62-016 Extracted:.,.0711512004 Analyzed:07115/2004 15:16 <br /> Compound Conc. ug/L Exp.Conc. Recovery% RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. I RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 23.2 20.9 25 92.8 83.6 10.4 65-165 20 <br /> Benzene 25.0 23.4 25 100.0 93.6 6.6 69-129 20 <br /> Toluene 25.6 24.6 25 103.2 98.4 4.8 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 396 402 500 79.2 80.4 72-128 <br /> Toluene-d8 1458 1487 1500 91.6 197.4 1 180-1131 <br /> .i <br /> Severn Trent Laboratories, Inc. 07/16/2004 16:28 <br /> STL San Francisco"1220 Quarry Lane,Pleasanton,CA 94566 <br /> Apar,-fSavamTmntPlc Tel 925 484 1919 Fax 925484 1096*www.stl-inc.oam*CA DHS ELAN 2496 Page 7 of 8 <br />