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r IT <br /> Submission: 2004-08-0191 <br /> Fuel Oxygenates by 82608 <br /> Clayton Group Services, Inc. <br /> Attn.: Mike Zimmerman <br /> 6920 Koll Center Parkway, Suite 216 <br /> Pleasanton, CA 94566 <br /> Phone: (925)426-2600 Fax: (925)426-0106 <br /> Project: 70-05319.00 Received: 08/06/2004 15:48 <br /> San Joaquin General Hospital <br /> Batch QC Report <br /> Prep(s): 5030B Test(s): 8260B <br /> Laboratory Control Spike Soil QC Batch #2004/08/13-01.69 <br /> LCS 2004/08/13-01.69-033 Extracted: 08/13/2004 Analyzed: 08/13/2004 07:33 <br /> LCSD 2004/08/13-01.69-051 Extracted: 08/13/2004 Analyzed: 08/13/2004 07:51 <br /> Compound Conc. ug/Kg Exp.Conc. Recovery% RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 39.2 39.3 50.0 78.4 78.6 0.3 65-165 20 <br /> Benzene 55.7 46.1 50.0 111.4 92.2 18.9 69-129 20 <br /> Toluene 47.9 47.5 50.0 95.8 95.0 0.8 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 412 414 500 82.4 82.8 72-124 <br /> Toluene-d8 502 495 500 100.4 99.0 75-116 <br /> Severn Trent Laboratories, Inc. 08/16/2004 09:36 <br /> STL San Francisco' 1220 Quarry Lane,Pleasanton.CA 94566 <br /> A part of Sevem Trent Plc Tel 925 484 1919 Fax 925 484 1096'www.stl-inc.com'CA DHS ELAP#2496 Page 4 of 5 <br />