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STLSubmission # 2003-07-0769 <br /> GasBTEX Fuel Oxygenates by 8260B (C6-C12) <br /> Cambria Environmental Emeryville <br /> Attn Cynthia Vasko <br /> 5900 Hollis Street, Ste A <br /> Emeryville, CA 94608 <br /> Phone (510)420-3344 Fax (510)420-9170 <br /> Protect 245-0783 Received 07/25/2003 1218 <br /> 98996184 <br /> Site 2575 Country Club Blvd Stockton <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch#2003108105-02 65 <br /> LCS 2003108105-02 65-028 Extracted 08/05/2003 Analyzed 08/05/2003 19 28 <br /> LCSD 2003/08105-02 65-050 Extracted 08105/2003 Analyzed 08/05/2003 19 50 <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS ILCSD % Rec RPD LCS LCSD <br /> Benzene 286 292 250 1144 1168 21 69-129 20 <br /> Toluene 285 28 5 25 0 1140 1140 0 0 70-130 20 <br /> Methyl tert-butyl ether(MTBE) 221 229 25 0 884 91 6 3 6 65-165 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 453 481 500 906 962 76-130 <br /> Toluene-d8 527 1540 1 500 1054 11080 1 178-1151 <br /> Severn Trent Laboratories, Inc 08/06/2003 15 39 <br /> STL San Francisco,1220 Quarry Lane Pleasanton CA 94566 <br /> AW ww S TMN Pk Tel 925 484 1919 Fax 925 484 1096'www stl-inc com"CA DHS FLAP#2496 Page 8 of 9 <br />