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1 <br /> Submission #- 2002-04-0498 <br /> ■ � iii <br /> Fuel Oxygenates by 82608 <br /> ' Batch QC report <br /> STI.San Francisco <br /> Pre Method 5030B 1220 Quarry Lane <br /> Test Method 82608 P Pleasanton CA 94566 <br /> ' Laboratory Control Spike(LCSILCSD) Water QC Batch#2002105103-09 27 Tel 925 484 1919 <br /> LCS 2002105103-01 27-003 Extracted 05/03/2002 11 36 Analyzed 05/ 1096 <br /> 03/2002 1 1 36 Fax www tl Stl 484-iric com <br /> LCSD 2002105103-01 27-004 Extracted 05/03/2002 12 03 Analyzed 05/03/2002 12 03 www chromalab com <br /> CA DHS ELAP#1094 <br /> ' Compound Conc [ug/L] 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 199 21 9 250 250 796 876 96 65-165 20 <br /> Benzene 221 226 25 0 25 0 884 904 2 2 69-129 20 <br /> ' Toluene 229 231 25 0 25 0 916 924 09 70-130 20 <br /> Surrogate(s) <br /> 1 2-Dichloroethane-l4 558 560 500 500 1116 1120 76-114 <br /> Toluene-d8 505 505 500 500 1010 1010 88-110 <br /> 1 <br /> 1 <br /> ' STL San Francisco is a part of Severn Trent Laboratories Inc Page 14 of 17 <br />