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Gas/BTEX Fuel Oxygenates by 8260B <br />SECOR-Sacramento <br />Attn.: Clint Harms <br />3017 Kilgore Road, Suite 100 <br />Rancho Cordova, CA 95670 <br />Phone: (916) 861-0400 Fax: (916) 861-0430 <br />Project: Conoco Philips Site # 5447 <br />Conoco Philips <br />Submission M 2004-02-0712 <br />Received: 02/23/2004 17:40 <br />Site: 1469 East Hammer Lane, Stockton, <br />California <br />Compound <br />Conc. mg/Kg <br />Exp.Conc. <br />Recovery % <br />RPD <br />Ctrl.Limits % <br />Flags <br />LCS <br />LCSD <br />LCS <br />LCSD <br />% <br />Rec. <br />RPD <br />LCS <br />I LCSD <br />Benzene <br />0.0455 <br />0.0433 <br />0.05 <br />91.0 <br />86.6 <br />5.0 <br />69-129 <br />20 <br />Toluene <br />0.0468 <br />0.0454 <br />0.05 <br />93.6 <br />90.8 <br />3.0 <br />70-130 <br />20 <br />Methyl tert-butyl ether (MTBE) <br />0.0491 <br />0.0465 <br />0.05 <br />98.2 <br />93.0 <br />5.4 <br />65-165 <br />20 <br />Surrogates(s) <br />1,2-Dichloroethane-d4 <br />390 <br />411 <br />500 <br />78.0 <br />82.2 <br />70-121 <br />Toluene -d8 <br />495 <br />495 <br />500 <br />99.0 <br />99.0 <br />81-117 <br />Severn Trent Laboratories, Inc. <br />STL San Francisco * 1220 Quarry Lane, Pleasanton, CA 94566 <br />A part of Severn Trent Pic Tel 925 484 1919 Fax 925 484 1096 ` www.sti-inc.com " CA DHS ELAN 2496 <br />03/01/2004 17:35 <br />Page 9 of 9 <br />