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t <br /> ®� STL <br /> Submission 2005-04-0633 <br /> Fuel Oxygenates by 82608 <br /> tTreadwell & Rollo-San Francisco <br /> Attn David Dixon <br /> 555 Montgomery Street Suite 1300 <br /> San Francisco, CA 94111-2554 <br /> Phone (415) 955-9040 Fax (415) 955-9041 <br /> Project 2597 10 Received 04/20/2005 14 00 <br /> Carando <br /> Batch QC Report <br /> ' Prep(s) 50308 Test(s) 82608 <br /> Matrix Spike ( MS 1 MSD) Soil QC Batch#2005104128-03 fit <br /> MS/MSD Lab ID 2005-04-0612- 002 <br /> MS 2005104128-03 62-031 Extracted 04/28/2005 Analyzed 04/28/2005 20 31 <br /> Dilution 100 <br /> MSD 2005104128-03 62-057 Extracted 04/28/2005 Analyzed 04/28/2005 20 57 <br /> Dilution 100 <br /> 10 Compound Conc ug/Kg S k Leve Recove % Limits% Flags <br /> MS MSD Sample ug/Kg MS MSD RPD Rec RPD MS MSD <br /> Methyl lert-butyl ether 373 435 ND 468 797 931 155 65-165 20 <br /> Benzene 469 562 ND 468 1002 1203 182 69-129 20 <br /> Toluene 499 573 ND 468 1066 1227 140 70 130 20 <br /> Surrogate(s) <br /> 1 1 2-Dichloroethane-d4 532 514 500 1064 1028 72-124 <br /> Toluene-d8 532 1 527 500 11064 105 4 1 175-116 <br /> i <br /> j <br /> • <br /> Severn Trent Laboratories, Inc 05/04/2005 13 06 <br /> STL San Francisco*1220 Quarry Lane,Pleasanton,CA 94566 <br /> Apar,,,swam Trent Plc Tel 925 4114 1919 Fax 925 4114 1016*www stl-inc corn*CA DHS ELAP#2496 Page 14 of 15 <br />