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S ' Submission #: 2003-03-0131 <br /> Fuel Oxygenates by 82608 <br /> 'I <br /> ATC Associates Inc. <br /> Attn.: Jim Lehrman <br /> ' 6602 Owens Drive Shite 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): 50308 Test(s): 8260E <br /> Laboratory Control Spike Water QC Batch#2003103112-01.62 <br /> LCS 2003103112-01.62-050 Extracted: 03/12/2003 Analyzed: 03/121200311:50 <br /> ' LCSD 2003103112-01.62-013 Extracted: 03/12/2003 Analyzed: 03/121200312:13 <br /> Compound Conc. ug/L Exp.Conc. Recovery RPD Ctrl.Limits% Flags <br /> ' LCS LCSD LCS LCSD % Rec. RPO LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 20.1 20.9 25.0 80.4 83.6 3.9 65-165 20 <br /> Benzene 23.1 23.9 25.0 92.4 95.6 3.4 69-129 20 <br /> Toluene 24.2 24.8 25.0 96.8 99.2 2.4 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 513 533 500 102.6 106.6 76-114 <br /> Toluene-d8 1495 1508 500 99.0 101.6 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 /> A Pal of Se rn T—W Pk Tel 925 484 1919 Fax 925 484 1096'www.stl-ine.com'CA DHS ELAP#2496 Page 17 of 19 <br />