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STLSubmission#: 2003-04-0389 <br /> Fuel Oxygenates by 8260B <br /> San Joaquin Company, Inc. <br /> Attn.: Dai Watkins <br /> 1120 Hollywood Ave, Suite 3 <br /> f<<_ Oakland, CA 94602-1459 <br /> Phone: (510) 336-1772 Fax: (510) 336-9119 <br /> Project: 9902.013 Received: 04/15/2003 17:19 <br /> C. Navarra <br /> Batch QC Report <br /> =} P.rep(s):; 5030BTest(s): 8260B` <br /> Method Blank Water QC Batch#:2003104/24-1'B.62 <br /> MB:.2003/04/24-1B.62-052: Date Extracted: 04/24/2003 11:14 <br /> Compound Conc. RL Unit Analyzed Flag <br /> a Gasoline ND 50 ug/L 041241200311:14 <br /> Benzene ND 0.5 ug/L 041241200311:14 <br /> 'toluene ND 0.5 ug/L 04/24/200311:14 <br /> Ethylbenzene ND 0.5 ug/L 04/24/200311:14 <br /> >-- j Total xylenes ND 1.0 ug/L 04/24/2003 11:14 <br /> tent-Butyl alcohol (TBA) ND 5.0 ug/L 04/24/2003 11:14 <br /> Methyl tert-butyl ether(MTBE) ND 0.5 ug/L 04/24/2003 11:14 <br /> Di-isopropyl Ether(DIPE) ND 1.0 ug/L 04/24/2003 11:14 <br /> E=thyl tert-butyl ether(ETBE) ND 0.5 ug/L 04/24/2003 11:14 <br /> tert-Amyl methyl ether(TAME) ND 0.5 ug/L 04/24/2003 11:14 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 102.4 76-114 % 04/24/2003 11:14 <br /> Toluene-d8 103.0 88-110 % 04/24/2003 11:14 <br /> r Severn Trent Laboratories, Inc. 05r06/2003 16:16 <br /> STL San Francisco*1220 Ouarry Lane,Pleasanton,CA 94566 <br /> A pap of Severn Trent pk Tel 925 484 1919 Fax 925 484 1096*www.stl-Inc.com*CA DHS FLAP#2496 Page 19 of 28 <br />