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S TL Submission M 2003-11-0104 <br /> Gas/BTEXIMTBE by 8260B <br /> SECOR-Sacramento <br /> Attn.: Rusty Benkosky <br /> 3017 Kilgore Road, Suite 100 <br /> Rancho Cordova,CA 95670 <br /> Phone: (916)861-0400 Fax: (916)861-0430 <br /> Project: 77CP.60004.00.0195 Received: 11/03/2003 17:05 <br /> Site# 11195 <br /> Site: 16500 Louis, Lathrop, CA <br /> Batch QC Report <br /> Prep(s); 5030B Test(s):8260B <br /> Laboratory Control Spike Water QC Batch#2003111/11 w2A.65 <br /> LCS 2003111111-2A:65-0.13 Extracted:11/1112003. . Analyzed: 11/11/2003 23:13 <br /> LCSD 2003111111-2A.65.036 Extracted: 1111112003. Analyzed: 11/11/2003 23:36 <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) 24.5 24.8 25 98.0 99.2 1.2 65-165 20 <br /> Benzene 24.6 23.8 25 98.4 95.2 3.3 69-129 20 <br /> Toluene 23.6 23.9 25 94.4 95.6 1.3 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 500 498 500 100.0 99.6 76-114 <br /> Toluene-d8 477 463 500 95.4 92.6 88-110 <br /> i <br /> j <br /> Severn Trent Laboratories, Inc. 11/14/2003 15:39 <br /> STL San Francisco`1220 Quarry Lane,Pleasanton,CA 94566 <br /> A peri of S—T-1 Plc Tel 925 484 1919 Fax 925 484 1096`www.stl-inc.com'CA DHS ELAP#2496 Page 5 of 7 <br />