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STT Submission: 2005-03-0627 <br /> Gas/BTEX/MTBE by 8260B (C6-C12) <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: 207-1359-001 Received: 03/18/2005 17:20 <br /> Shell SAP Number 136143 <br /> Site: 4315 Waterloo Street, Stockton, CA <br /> Batch QC Report <br /> Prep(s): 5030B Test(s): 8260B <br /> Laboratory Control Spike Soil QC Batch#2005/03/28-2A.62 <br /> LCS 2005/03/28-2A.62-024 Extracted: 03/28/2005 Analyzed: 03/28/200511:24 <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) 0.0441 0.05 88.2 65-165 20 <br /> Benzene 0.0434 0.05 86.8 69-129 20 <br /> Toluene 0.0501 0.05 100.2 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 485 500 97.0 76-124 <br /> Toluene-d8 527 1 1 500 105.4 75-116 <br /> Severn Trent Laboratories, Inc. 03/28/200514:57 <br /> STL San Francisco"1220 Quarry Lane,Pleasanton,CA 94566 <br /> A part of Severn Trent Plc Tel 925 484 1919 Fax 925 484 1096"www.stl-inc.com'CA DHS ELAP#2496 Page 33 of 39 <br />