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I' Submission 2005-02-0138 <br /> i <br /> Fuel Oxygenates by 82608 <br /> Aqua Science Engineers, Inc <br /> Attn Robert Kitay <br /> 208 West EI Pintado Road <br /> Danville, CA 94526 <br /> Phone (925) 820-9391 Fax (925) 837-4853 <br /> Project 3254 Received 02/04/2005 1720 <br /> Singh <br /> Site 574 West Grant Line Rd , Tracy, CA <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 82608 <br /> Laboratory Control Spike Water QC Batch#2005102111-01 64 <br /> LCS 2006/02/11-0164-045 Extracted 02/11/2005 Analyzed 02/11/2005 07 45 <br /> LCSD <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RAD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 301 250 1204 65-165 20 <br /> Benzene 261 25 0 1044 69-129 20 <br /> Toluene 270 250 1080 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 487 500 97 4 73-130 <br /> Toluene-d8 568 500 11136 81-114 <br /> • Severn Trent Laboratories, Inc 02/11/2005 1604 <br /> STL San Francisco'1220 Quarry lane Pleasanton CA 94566 <br /> A Pan of se-m T—t Plc Tel 925 484 1919 Fax 925 484 1096.www stl inc cam"CA QHS ELAP#2496 Page 10 of 14 <br />