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Submission #: 2002-04-0498 <br /> Fuel Oxygenates by 82608 <br />' Batch QC report STL San Francisco <br /> Test Method 8260B Prep Method 5030B 1220 Quarry Lane <br /> Pleasanton CA 94566 <br /> Laboratory Control Spike(LCSILCSD) Water QC Batch#2002105106-01 27 Tel 925 484 1919 <br /> LCS 2002105106-01 27-003 Extracted 05/06/2002 10 25 Analyzed 05/06/2002 10 25 Fax 925 484 1096 <br /> www stl-inc com <br /> LCSD 2002105106-01 27-004 Extracted 05/06/2002 10 52 Analyzed 05/06/2002 10 52 www chromalab wm <br /> CA DHS ELAP#1094 <br /> ' Compound Cont [uglL] Exp Conc [ug/L] Recovery RPD Ctrl Limits[%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recover RPD LCS LCSD <br /> ' Methyl tert-butyl ether 186 197 250 250 744 788 57 65-165 20 <br /> Benzene 21 2 214 250 25 0 848 856 09 69-129 20 <br /> ' Toluene 226 226 250 250 904 90 4 00 70-130 20 <br /> Surrogate(s) <br /> 1 2-Dichloroethane-d4 539 558 500 500 1078 1116 76-114 <br /> Toluene-d8 513 489 500 500 1026 978 88-110 <br /> 1 <br /> ' STL San Francisco is a part of Severn Trent Laboratories Inc Page 15 of 17 <br />