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MOWN' S T L Submission: 2005-10-0071 <br /> Gas/BTEX/MTBE by 8260B <br /> SECOR-Sacramento <br /> Attn.:Amy Draffan <br /> 3017 Kilgore Road, Suite 100 <br /> Rancho Cordova, CA 95670 <br /> Phone: (916)861-0400 Fax: (916)861-0430 <br /> Project: 77CP.60004.04.0195 Received: 10/04/2005 09:45 <br /> Conoco Philips Site#11195 <br /> Site: 16500 Louis Ave, Lathrop <br /> Batch QC Report <br /> Prep(s): 5030B Test(s): 8260B <br /> Laboratory Control Spike Water QC Batch#2005/10107-01.64 <br /> LCS 2005110107-01.64-015 Extracted: 10/07/2005 Analyzed: 10/07/2005 08:15 <br /> LCSD 2005110107-01.64-057 Extracted: 10/07/2005 Analyzed: 10/07/2005 08:57 <br /> Compound Conc. ug/L Exp.Conc. Recovery% RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 24.9 25.3 25.0 99.6 101.2 1.6 65-165 20 <br /> Benzene 28.0 27.7 25.0 112.0 110.8 1.1 69-129 20 <br /> Toluene 27.4 27.4 25.0 109.6 109.6 0.0 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 478 499 500 95.6 99.8 73-130 <br /> Toluene-d8 549 540 500 109.8 108.0 81-114 <br /> Severn Trent Laboratories, Inc. 10/19/2005 15:46 <br /> STL San Francisco*1220 Quarry Lane,Pleasanton,CA 94566 <br /> A part d Severn T—t Plc Tel 925 484 1919 Fax 925 484 1096*www.stl-inc.com*CA DHS ELAP#2496 Page 5 of 6 <br />