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STLSubmission: 2005-04-0504 <br /> Gas/BTEX Fuel Oxygenates by 8260B (C6-C12) <br /> Cambria Environmental Emeryville <br /> Attn Cynthia Vasko <br /> 5900 Hollis Street, Ste A <br /> Emeryville, CA 94608 <br /> Phone (510)420-3344 Fax (510)420-9170 <br /> Project 247-0783-003 Received 04/18/2005 12 58 <br /> 98996184 <br /> Site 2575 Country Club Buulevard, Stockton <br /> Compound Conc u Spk Leve Recove % Limits% Fla s <br /> MS MSD sample u M5 MSO RPD Rec RPD MS MSD <br /> Methyl tert-butyl ether 334 348 11 25 896 952 61 65-165 20 <br /> Benzene 237 23 3 0 548 25 926 910 17 69-129 20 <br /> Toluene 372 372 127 25 980 98 0 0 0 70-130 20 <br /> Surrogate(s) <br /> 1,2-Dichloroethane-d4 433 471 500 866 942 73-130 <br /> Toluene-d8 498 488 500 1996 976 1 81-114 <br /> s <br /> Severn Trent Laboratories, Inc 041281200517 49 <br /> STL San Francisco'1220 Quart'Lane,Pleasanton,CA 94566 <br /> AWof Sw-M hent Plc Tel 925 484 1919 Fax 925 484 1096*www stl-Inc com*CA DHS FLAP#2496 Page 10 of 12 <br />