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STT Submission# 2004-01-0710 <br /> Gas/BTEXFuel Oxygenates by 82608 (High Level) <br /> Treadwell & Rollo-San Francisco <br /> Attn Brian Moore <br /> 555 Montgomery Street, Suite 1300 <br /> San Francisco, CA 94111-2554 <br /> Phone (415) 955-9040 Fax (415) 955-9041 <br /> Project 2597 10 Received 01/13/2004 17 27 <br /> Stockton <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 8260B <br /> Laboratory Control Spike Soil QC Batch#2004101127-03 68 <br /> LCS 2004101127-03 68-030 Extracted 01/27/2004 Analyzed 01/28/2004 02 30 <br /> LCSD 2004101127-03 68-049 Extracted 01/27/2004 Analyzed 01/28/2004 02 49 <br /> Compound Conc ug/Kg Exp Conc Recovery% JRPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPI] LCS LCSD <br /> Benzene 9860 10100 10000 98 6 101 0 24 69-129 20 <br /> Toluene 9620 10000 10000 96 2 1000 3 9 70-130 20 <br /> Methyl tert-butyl ether(MTBE) 9180 9480 10000 918 948 32 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichlorcethane-i4 235 235 250 940 94 0 70-121 <br /> Toluene-d8 223 1231 1250 1892 1924 1 181-117 <br /> i <br /> i <br /> i <br /> Severn Trent Laboratories, Inc 01/29/2004 1527 <br /> STL San Francisco`1220 Quarry Lane Pleasanton CA 94566 <br /> A put of Severn Trent Pk Tel 925 484 1919 Fax 925 484 1096'www sti-inc com'CA DHS ELAPS 2496 Page 4 of 5 <br />