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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): 5030B Test(s): 8260B <br /> Method Blank Soil QC Batch#2004/08/11-03.62 <br /> MB: 2004/08/11-03.62-033 Date Extracted: 08/11/2004 13:33 <br /> Compound Conc. RL Unit Analyzed Flag <br /> Gasoline ND 50000 ug/Kg 08/11/200413:33 <br /> Benzene ND 500 ug/Kg 08/11/200413:33 <br /> Toluene ND 500 ug/Kg 08/11/200413:33 <br /> Ethyl benzene ND 500 ug/Kg 08/11/2004 13:33 <br /> Total xylenes ND 500 ug/Kg 08/11/2004 13:33 <br /> tert-Butyl alcohol (TBA) ND 2500 ug/Kg 08/11/2004 13:33 <br /> Methyl tert-butyl ether(MTBE) ND 500 ug/Kg 08/11/2004 13:33 <br /> Di-isopropyl Ether(DIPE) ND 1000 ug/Kg 08/11/2004 13:33 <br /> Ethyl tert-butyl ether(ETBE) ND 500 ug/Kg 08/11/2004 13:33 <br /> tert-Amyl methyl ether(TAME) ND 500 ug/Kg 08/11/2004 13:33 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 98.8 53-129 % 08/11/200413:33 <br /> Toluene-d8 95.2 47-136 % 08/11/200413:33 <br /> Severn Trent Laboratories, Inc. 08/12/2004 11:02 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton,CA 94566 <br /> A part of Severn T-1 Plc Tel 925 484 1919 Fax 925 484 1096'www.stl-inc.com'CA DHS ELAP#2496 Page 3 of 4 <br />