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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 <br />Shell SAP Number 136143 <br />Submission: 2005-03-0628 <br />Received: 03/18/2005 17:20 <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 # 2005/03/25-1 C.62 <br />LCS 2005/03/25-1 C.62-045 Extracted: 03/25/2005 Analyzed: 03/25/2005 07:45 <br />LCSD <br />Compound <br />Conc. mg/Kg <br />Exp.Conc. Recovery % RPD Ctrl.Limits % Flags <br />LCS <br />LCSD <br />LCS <br />LCSD % Rec. <br />RPD LCS <br />LCSD <br />Methyl tert-butyl ether (MTBE) <br />0.0499 <br />0.05 99.8 <br />65-165 <br />20 <br />Benzene <br />0.0541 <br />0.05 108.2 <br />69-129 <br />20 <br />Toluene <br />0.0570 <br />0.05 114.0 <br />70-130 <br />20 <br />Surrogates(s) <br />1,2-Dichloroethane-d4 <br />491 <br />500 98.2 <br />76-124 <br />Toluene -d8 <br />529 <br />500 105.8 <br />75-116 <br />Severn Trent Laboratories, Inc. <br />STL San Francisco * 1220 Quarry Lane, Pleasanton, CA 94566 <br />A pan of Sevem Trent Plc Tel 925 484 1919 Fax 925 484 1096 * www.stl-inc.com * CA DHS ELAN 2496 <br />03/28/2005 15:26 <br />Page 4 of 6 <br />