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STL <br /> Submission: 2004-08-0191 <br /> Gas/BTEXFuel Oxygenates by 8260B (High Level) <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): 50308 Test(s): 8260B <br /> Laboratory Control Spike Soil QC Batch #2004/08/11-03.62 <br /> LCS 2004/08/11-03.62-006 Extracted: 08/11/2004 Analyzed: 08/11/200411:06 <br /> LCSD 2004/08/11-03.62-044 Extracted: 08/11/2004 Analyzed: 08/11/200410:44 <br /> Compound Conc. ug/Kg Exp.Conc. Recovery% RPD Ctrl.Limits % Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Benzene 9290 9020 10000 92.9 90.2 2.9 69-129 20 <br /> Toluene 9890 10000 10000 98.9 100.0 1.1 70-130 20 <br /> Methyl tert-butyl ether(MTBE) 6920 7820 10000 69.2 78.2 12.2 65-165 20 <br /> Surrogates(s) <br /> 1.2-Dichloroethane-d4 230 219 250 92.0 87.6 53-129 <br /> Toluene-d8 234 1 250 1 250 93.6 1 100.0 1 47-136 <br /> Severn Trent Laboratories, Inc. 08/12/200411:02 <br /> STL San Francisco= 1220 Quarry Lane, Pleasanton,CA 94566 <br /> A Pan or savem Treni Pic Tel 925 484 1919 Fax 925 484 1096'www.sti-inc.com"CA DHS ELAP#2496 Page 4 of 4 <br />