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Submission#: 2002-07-0582 <br /> Gas/BTEXFue! Oxygenates by 8260B <br /> San Joaquin Company, Inc, STL San Francisco <br /> Attn.: Dai Watkins Quarry Lane <br /> Plea <br /> _ Pleasanton,CA 94568 <br /> j 1120 Hollywood Ave, Suite 3 <br /> Oakland, CA 94602-1459 Tel:(925)484-1919 <br /> Phone: (510) 336-1772 Fax: (510) 336-9119 Fax:(925)484-1096 <br /> www.stl-inc,com <br /> Project: 9902,013 Received: 071291200217:28 www.chromalab.com <br /> C. Navarra <br /> CA DHS PLAP#2496 <br /> -ti <br /> i Batch QC Report' <br /> Prep(s)-. 5030B Test(s): 8260FAB: <br /> Laboratory Control Spike Water QC Batch#2002107131-01.62 <br /> Ii <br /> LCS 2002107131-01.62-049 Extracted: 0713112002; Analyzed: 07/31/200213:49 <br /> LCSD 2002/07/31-01.62-011 Extracted: 07/31/2002 Analyzed; 07!3.172002 14.11. <br /> Compound <br /> Conc. ug/L Exp.Conc. Recovery RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS I LCSD % Rec. RPD LCS LCSD <br /> i Benzene 19.9 20.7 25.0 79.6 82.8 3.9 69-129 20 <br /> Toluene 21.0 21,6 25.0 84.0 86.4 2.8 70-130 20 <br /> Methyl Cert-butyl ether(MTBE) 21.9 21.3 25.0 87.6 85.2 2.8 65-165 20 <br /> r <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 427 425 500 85,4 85.0 76-114 <br /> Toluene-d8 1515 504 500 11010 100.8 1 1 88-110 <br /> F-. <br /> 1 <br /> 'i <br /> .J <br /> :.yk <br /> --t <br /> 08/02/2002 15:08 STL San Francisco Is part of Severn Trent Laboratories,Inc. Page 18 Of 21 <br /> i':I <br />