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Submission# 2005-04-0633 <br /> Fuel Oxygenates by 82606 <br /> • Treadwell & Rollo-San Francisco STL San Francisco <br /> 1220 Quarry Lane <br /> Attn David Dixon Pleasanton,CA 94566 <br /> 555 Montgomery Street Suite 1300 <br /> San Francisco, CA 94111-2554 Tel (925)484-1919 <br /> Phone (415)955-9040 Fax (415) 955-9041 Fax (925)484-1096 <br /> www stl-ine com <br /> Project 2597 10 Received 04/20/2005 14 00 www chromalab cam <br /> Carando <br /> ' CA DHS ELAP#2496 <br /> Batch QC Report <br /> Prep(s) 50308 Test(s) 82608 <br /> Matrix Spike ( MS 1 MSD ) Water QC Batch#2005/04/30-01 64 <br /> MS/MSD Lab ID 2005-04-0640- 005 <br /> MS 2005104/30-01 64-052 Extracted 04/30/2005 Analized 04/30/2005 14 52 <br /> Dilution 100 <br /> MSD 2005104/30-01 64-014 Extracted 04/30/2005 Analized 04/30120051514 <br /> ' Dilution1 00 <br /> Compound Conc ug/L S k Level Recove % Limits% Flags <br /> MS f43 <br /> Sam le ug/L MS MSD RPD Rec RPD MS MSD <br /> Methyi tert-butyl ether 1050 1080 250 -120 0 400 -400 65-165 20 M3 M3 R1 <br /> Benzene 144 124 25 0 80 0 1920 824 69-129 20 M3 M3,R1 <br /> Toluene 386 9 59 25 0 1160 1360 159 70-130 20 M4 <br /> ' Surrogate(s) <br /> 1 2-Dichloroethane-d4 426 420 500 852 84 0 73-130 <br /> Toluene-d8 490 492 500 98 0 1984 81-114 <br /> 05/13/2005 09 05 STL San Francisco is Dart of Severn Trent Laboratories Inc Page 5 of 6 <br />