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Mw�,""I S T L #: <br /> GasIBTEXFuef Oxygenates by 8260B Submission 2003-01-0323 <br /> San Joaquin Company, Inc. <br /> Attn.: Dai Watkins <br /> r..,l <br /> 1120 Hollywood Ave, Suite 3 <br /> Oakland, CA 94602-1459 <br /> Phone: (510) 336-1772 Fax: (510) 336-9119 <br /> Project: 9902,013 Received: 01/20/2003 16:24 <br /> C. Navarra <br /> Site: 7500 W. 11th St. <br /> Tracy, CA <br /> Batch QC Report <br /> Prep(s): 5030E Test(s): 8260FAB <br /> '- Laboratory Control Spike Water QC Batch#'2003101127-01.27 <br /> LCS 2003/01/27-01.27-005 Extracted: 01/27/2003 Analyzed: 01/27/200310:26 <br /> i <br /> LCSD 2003101127-01.27-006 Extracted: 01/27/2003 Analyzed: 011271200310:51 <br /> Compound Conc. ug/L Exp,Conc. Recovery RPD Ctrl.Limits % Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Benzene 24.6 26.2 25.0 98.4 104.8 6.3 69-129 20 <br /> Toluene 25.3 25.8 25.0 101.2 103.2 2,0 70-130 20 <br /> Methyl tert-butyl ether(MTBE) 29.2 30.9 25.0 116.8 123,6 5.7 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 516 511 500 103.2 102.2 76-114 <br /> Toluene-d8 490 506 500 98.0 101.2 88-110 <br /> i-7 I <br /> r> <br /> Severn Trent Laboratories, Inc. 01!291200311:03 <br /> F. STL San Francisco*1220 Quarry Lane,Pleasanton,CA 94566 <br /> A pert u,severe Trees Pk Tel 925 484 1919 Fax 925 484 1096*www.stl-inc.com*CA DHS ELAP#2496 Page 21 of 24 <br />