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STLSubmission#: 2003-01-0323 <br /> Gas/BTEXFuel Oxygenates by 8260B <br /> San Joaquin Company, Inc. <br /> Attn.: Dai Watkins <br /> { 1120 Hollywood Ave, Suite 3 <br /> Oakland, CA 94602-1459 <br /> r• <br /> Phone: (510) 336-1772 Fax: (510) 336-9119 <br /> Project: 9902.013 Received: 01/20/2003 16:24 <br /> C. Navarra <br /> Site: 7500 W. 11th St. <br /> Tracy, CA <br /> Batch QC Report. <br /> Prep(s): 5030B Test(s); 8260FAB <br /> X-- Laboratory Control Spike Water QC Batch#2003104126-01.27 <br /> LCS 2003101126-01.27-004 Extracted: 01/26/2003 :. Analyzed: 01126/2003 09:38 <br /> LCSD 2003101126-01.27-005 Extracted: 01/26/2003 Analyzed: 01/26/2003 10:05 <br /> Compound Conc. ug/L Exp.Conc. Recovery RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Benzene 20.9 20.8 25.0 83.6 83.2 0.5 69-129 20 <br /> ' ) Toluene 21.5 22.2 25.0 66.0 88.8 3.2 70-130 20 <br /> Methyl tent-butyl ether(MTBE) 23.7 22.3 25.0 94.8 89.2 6.1 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethene-d4 483 459 500 96.6 91.8 76-114 <br /> t-==; Toluene-d8 501 481 500 100.2 96.2 88-110 <br /> I _l <br /> i <br /> k <br /> l+< <br /> Severn Trent Laboratories, Inc. 01/29/2003 11:03 <br /> STL San Francisco*1220 quarry Lane,Pleasanton,CA 94566 <br /> A pan of se.ern r,-n1 h- Tel 925 484 1919 Fax 925 484 1098*www.stl-inc,com*CA DHS ELAP#2496 Page 20 of 24 <br />