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---------- <br /> STL <br /> Submission M 2004-05-0976 <br /> Gas/BTEX/MTBE by 8260B <br /> SECOR-Sacramento <br /> AM.: Amy Draffan <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# 11195 Received: 05/27/2004 17:10 <br /> Site: 16500 Louise, Lathrop, CA <br /> Batch QC Report <br /> Prep(s): 50308 Test(s):82608 <br /> Laboratory Control.Spike Water< QC.Batch.#2004106104-'1 C.66 <br /> LGS 2004.106104-1:C 66 038 Extracted: 0610412004 Analyzed.0010412004 07:38 <br /> LCSD 20041061041 C 66=0.03 Extracted: 06/04/2004 Analyzed:06/04/2004 08:03 <br /> Compound Conc. ug/L Exp.Conc. Recovery% RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Methyl tent-butyl ether(MTBE) 24.5 23.8 25 98.0 95.2 2.9 65-165 20 <br /> Benzene 24.6 25.0 25 98.4 100.0 1.6 69-129 20 <br /> r- Toluene 25.2 25.2 25 100.8 100.8 0.0 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 471 455 500 94.2 91.0 72-128 <br /> Toluene-d8 523 529 500 104.6 105.8 80-113 <br /> Severn Trent Laboratories, Inc. 061051200414:32 <br /> STL San Francisco.1220 Quarry Lane,Pleasanton,CA 94566 <br /> A pert of Swam Tnnl Plc Tel 925 484 1919 Fax 925 484 1096`www.sti-inc.com"CA DHS ELAP#2496 Page 5 of 6 <br />