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� STL <br /> Submission#: 2003-03-0131 , <br /> Fuel Oxygenates by 82608 <br /> ATC Associates Inc. <br /> Attn.: Jim Lehrman <br /> 6602 Owens Drive Suite 100 <br /> Pleasanton, CA 94588 <br /> Phone: (925)460-5300 Fax: (925)463-2559 <br /> Project: 75.62503.3204 Received: 03/07/2003 08:35 <br /> Quik Stop#132 <br /> Batch QC Report <br /> ' Prep(s): 503013 Test(s):8260B <br /> Matrix Spike (MS 1 MSD ] Water QC Batch#2003103110-01.62 <br /> MW-1R >> MS Lab ID: 2003-03-0931 -001 <br /> MS: 2003/03/10-01.62-037 Extracted: 03/1012003 Analyzed: 03/101200314:37 <br /> Dilution: 1.00 <br /> MSD: 2003/03110-01,62-059 Extracted: 03/1012003 Analyzed: 031101200314:59 <br /> Dilution: 1.00 <br /> Compound Conc. u Spk.Leve ecove Limits% Flags <br /> MS MSD Sample u 1L MS MSD RPD Rec. RPD MS MSD <br /> Methyl lert-butyl ether 116 117 94.9 25.0 84.4 88.4 4.6 65-165 20 <br /> Benzene 22.3 22.7 ND 25.0 89.2 90.8 1.8 69-129 20 <br /> Toluene 22.7 23.3 ND 25.0 90.8 93.2 2.6 70-430 20 <br /> Sumgate(s) <br /> 1,2-Dichloroethane-d4 524 536 500 104.9 107.2 76-114 <br /> Toluene-d8 474 457 500 94.8 91.3 1 88-110 <br /> 1 <br /> 1 <br /> Severn Trent Laboratories, Inc. 03/12/2003 17:18 <br /> STL San Francisco"1220 Quarry Lane,Pleasanton,CA 94566 <br /> p part or g,vem Trent Pk Tel 925 484 1919 Fax 925 484 1096'www,stl-inc.com"CA DMS ELAP*2496 Page 18 of 19 <br />