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i <br /> Submission#: 2003-04-0389 <br /> S T L <br /> Fuel Oxygenates by 8260B <br /> l San Joaquin Company, Inc. <br /> j Attn.: Dai Watkins <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: 04/15/2003 17:19 <br /> C. Navarra <br /> `=:i <br /> Batch QC Report <br /> ' lPrep(s)';50308 Test(s). 8260B <br /> Laboratory.Control Spike Water QC Batch:#2003104122=02.65 <br /> LCS 2003104/22-02.65-052 Extracted: 04/23/2003 Analyzed: 041231200319:14 <br /> LCSD' 2003104122-02.66-002 Extracted: 04/22/2003 Analyzed: 04/22/2003:19.-36.. <br /> Compound <br /> Conc. ug/L Exp.Conc. Recovery RPD Ctri.Llmits% Flags <br /> LCS LCSD LCS I LCSD % Rec. RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 25.8 25.5 25.0 103.2 102.0 1.2 65-165 20 <br /> Benzene 20.8 19.9 25.4 83.2 79.6 4.4 69-129 20 <br /> =-� Toluene 20.1 20.0 25:0 80,4 60.0 0.5 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 541 557 500 108.2 111.4 76-114 0 <br /> Toluene-d8 477 475 500 95.4 95.0 88-110 0 <br /> i <br /> I <br /> ..y i <br /> i <br /> I <br /> } <br /> S <br /> I <br /> ySevern Trent Laboratories, Inc. 05!06!200318;18 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton,CA 94566 <br /> Apzdof Bavam7mnl Plc Tel 925 484 1919 Fax 925 484 1096www.stl-Inc,corn CA DHS ELAP*2496 Page 21 of 28 <br /> I ,� 6 <br />