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�® <br /> STL <br /> Submission 2005-03-0930 <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 /> Protect 247-0783-003 Received 03/30/2005 12 55 <br /> 98996184 <br /> Site 2575 Country Club Boulevard, Stockton <br /> Batch QC Report <br /> Prep(s) 50308 Test(s) 82608 <br /> Matrix Spike( MS/MSD) Water QC Batch#2005!04105-2A,466 <br /> EFF » MS Lab ID 2005-03-0930-005 <br /> MS 2005104105-2A 66-006 Extracted 04/05/2005 Analyzed 04105/2005 20 06 <br /> Dilution 100 <br /> . MSD 2005104105-2A 66-032 Extracted 04/05/2005 Analyzed 04/05/2005 20 32 <br /> D itution 100 <br /> Compound Conc Ug/L S k Leve Recove % Limits% Fla s <br /> MS MSD Sample u /L MS MSD RPD Rec RPD MS MSD <br /> Methyl tert-butyl ether 289 25 8 ND 25 1156 1032 113 65-165 20 <br /> Benzene 23 7 21 4 ND 25 948 $56 102 69-129 20 <br /> Toluene 28 4 250 NO 25 1136 1000 127 70-130 20 <br /> Surrogate(s) <br /> 1 2-Dichloroethane-d4 483 483 500 966 966 73-130 <br /> Toluene-d8 528 520 500 11056 1040 81-114 <br /> • <br /> Severn Trent Laboratories, Inc 04108!2005 14 28 <br /> STL San Francisco'1226 Quarry Lane Pleasanton,CA 94566 <br /> A WK Of�v*m Tmm Pic Tel 925 484 1919 Fax 925 484 1096"www stl-Inc com'CA DHS FLAP#2496 Page 13 of 16 <br />