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S T L Submission: 2004-08-0191 <br /> ■ii'�11'i'�i7 <br /> Fuel Oxygenates by 8260B <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#2004/08/10-01.69 <br /> LCS 2004/08/10-01.69-004 Extracted: 08/10/2004 Analyzed: 08/10/200418:04 <br /> LCSD 2004/08/10-01.69-045 Extracted: 08/10/2004 Analyzed: 08/10/200418:37 <br /> Compound Conc. ug/Kg Exp.Conc. Recovery% RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS I LCSD <br /> Methyl tert-butyl ether(MTBE) 39.8 40.7 50.0 79.6 81.4 2.2 65-165 20 <br /> Benzene 59.1 58.0 50.0 118.2 116.0 1.9 69-129 20 <br /> Toluene 53.2 51.7 50.0 106.4 103.4 2.9 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 493 458 500 98.6 91.6 72-124 <br /> Toluene-d8 530 514 500 106.0 102.8 75-116 <br /> Severn Trent Laboratories, Inc. 08/12/200411:02 <br /> STL San Francisco' 1220 Quarry Lane,Pleasanton,CA 94566 <br /> A paq a seem T-1 Plc Tel 925 484 1919 Fax 925 484 1096'www.stl-inc.com'CA DHS ELAP#2496 Page 9 of 11 <br />