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Submission: 2004-08-0191 <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 /> Matrix Spike ( MS/MSD ) Soil QC Batch#2004/08/13-01.69 <br /> S131-3.5 >> MS Lab ID: 2004-08-0191 -007 <br /> MS: 2004/08/13-01.69-013 Extracted:08/13/2004 Analyzed: 08/13/200412:13 <br /> Dilution: 1.00 <br /> MSD: 2004/08/13-01.69-031 Extracted:08/13/2004 Analyzed: 08/13/200412:31 <br /> Dilution: 1.00 <br /> Compound Conic. ug/Kg Spk.Level Recovery% Limits% Flags <br /> MS MSD Sample ug/Kg MS MSD RPD Rec. RPD MS MSD <br /> Methyl tert-butyl ether 35.2 34.3 ND 49.9 70.5 72.1 2.2 65-165 20 <br /> Benzene 56.8 53.6 ND 49.9 113.8 112.6 1.1 69-129 20 <br /> Toluene 51.9 46.0 ND 49.9 104.0 96.6 7.4 70-130 20 <br /> Surrogate(s) <br /> 1,2-Dichloroethane-d4 407 399 500 81.4 79.8 72-124 <br /> Toluene-d8 550 491 500 110.0 98.2 75-116 <br /> Severn Trent Laboratories, Inc. 08/16/200409:36 <br /> STL San Francisco.1220 Quarry Lane,Pleasanton,CA 94566 <br /> A part of Severn Trent Plc Tel 925 484 1919 Fax 925 484 1096"www.stl-inc.com'CA DHS ELAP#2496 Page 5 of 5 <br />