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Submission 2005-02-0138 <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 17 20 <br /> Singh <br /> Site 574 West Grant Line Rd , Tracy, CA <br /> Batch QC Report <br /> Prep(s) 50308 Test(s) 826013 <br /> Matrix Spike ( MS 1 MSD ) Water QC Batch#2005102/11-01 64 <br /> MSIMSD Lab ID 2005-02-0167 - 003 <br /> MS 2005102111-01 64-021 Extracted 02/11/2005 Analyzed 02/11 t2005 12 21 <br /> Dilution 100 <br /> MSD 2005102111-0164-043 Extracted 02/11/2005 Analyzed 02111120051243 <br /> Dilution 100 <br /> Compound Cone ug/L S k Level Recove % Limits% Flags <br /> MS MSD Sample ug/L MS MSD RPD Rec RPD MS MSD <br /> Methyl Cert butyl ether 328 305 ND 250 131 2 1220 73 65-165 20 <br /> Benzene 283 279 ND 250 1132 1116 14 69-129 20 <br /> Toluene 285 274 ND 250 1140 1096 3 9 70-130 20 <br /> Surrogate(s) <br /> 1 2-Dichloroethane-d4 508 486 500 101 S 97 2 73-130 <br /> Toluene-d8 557 1558 500 1 1114 11116 1 181-114 <br /> Severn Trent Laboratories, Inc 02/11/2005 16 04 <br /> STL San Francisco"1220 Quarry Lane Pleasanton CA 94566 <br /> A pan of Severn Trent Pic Tel 926 484 1919 Fax 925 484 1096'www stl me corn'CA DHS FLAP#2496 Page 12 of 14 <br />