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® S TTL Submission: 2005-04-0230 <br /> 1 <br /> Gas/BTEX Fuel Oxygenates by 8260B (MC12) <br /> Cambria Environmental Emeryville <br /> Attn.:Aubrey Cool <br /> 5900 Hollis Street, Ste. A <br /> Emeryville, CA 94608 <br /> Phone: (510)420-3336 Fax: (510)420-9170 <br /> Project: 207-0953-001 Received: 04/07/2005 15:17 <br /> SAP 136146 <br /> Site: 7700 Moreland Street, Stockton, CA <br /> Batch QC Report <br /> Prep(s): 5030B Test(s): 8260B <br /> Laboratory Control Spike Soil QC Batch#2005/04/21-3A.66 <br /> LCS 2005/04/21-3A.66-037 Extracted: 04/21/2005 Analyzed: 04/21/200515:37 <br /> LCSD <br /> Compound Conc. mg/Kg Exp.Conc. Recovery% RPD Ctrl.Limits% Flags <br /> LCS LCSD LCS LCSD % Rec. RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 0.0577 0.05 115.4 65-165 20 <br /> Benzene 0.0526 0.05 105.2 69-129 20 <br /> Toluene 0.0548 0.05 109.6 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 506 500 101.2 76-124 <br /> Toluene-d8 1517 1 500 103.4 75-116 <br /> Severn Trent Laboratories, Inc. 04/22/200512:26 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton,CA 94566 <br /> A Dart of Severn Trent Plc Tel 925 484 1919 Fax 925 484 1096`www.st]-inc.com'CA DHS ELAP#2496 Page 8 of 9 <br />