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STLSubmission# 2003-08-0336 <br /> Gas/BTEX/MTBE by 8260B (C6-C12) <br /> Cambria Environmental Emeryville <br /> AM Cynthia Vasko <br /> 5900 Hollis Street, Ste A <br /> Emeryville, CA 94608 <br /> Phone (510)420-3344 Fax (510)420-9170 <br /> Project 245-0783 Received 08/11/2003 11 30 <br /> 98996184 <br /> Site 2575 Country Club Blvd Stockton <br /> Batch QC Report <br /> Prep(s) 50306 Test(s) 8260FAB <br /> Laboratory Control Spike Water QC Batch#2003108116-2A 64 <br /> LCS 2003108/16-2A 64-050 Extracted 08/16/2003 Analyzed 08/16/2003 19 27 <br /> LCSD 2003108116-2A 64-049 Extracted 08/16/2003 Analyzed 08/16/2003 19 49 <br /> Compound Conc cg/L Exp Conc Recovery% RPD Ctri Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 29 2 298 25 1168 119 2 2 0 65-165 20 <br /> Benzene 276 28 2 25 1104 1128 2 2 69-129 20 <br /> Toluene 298 300 25 1192 1200 0 7 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 531 533 500 1062 1066 76-130 <br /> Toluene-d8 516 510 500 103 2 11020 1 78-115 <br /> Severn Trent Laboratories, Inc 08/25/2003 12 15 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton,CA 94566 <br /> AWdS-V, Twdat Tel 925 484 1919 Fax 925 484 1096'www stl-inc com'CA DHS ELAP#2496 Page 8 of 10 <br />