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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: 2071359-001 <br />Shell SAP Number 136143 <br />a <br />Submission: 2005-03-0628 <br />Total Lead <br />Received: 03/18/2005 17:20 <br />Site: 4315 Waterloo Street, Stockton, CA <br />Batch QC Report <br />Prep(s): 3050B Test(s): 6010B <br />Laboratory Control Spike Soil QC Batch # 2005/03/18-04.15 <br />LCS 2005/03/18-04.15-068 Extracted: 03/18/2005 Analyzed: 03/21/200514:30 <br />LCSD 2005/03/18-04.15-069 Extracted: 03/18/2005 Analyzed: 03/21/200514:34 <br />Compound <br />Conc. mg/Kg Exp.Conc. Recovery % RPD Ctrl.Limits % Flags <br />LCSLCSD <br />I LCS <br />I LCSD % Rec. <br />RPD LCS LCSD <br />Lead <br />92.9 <br />91.4 100.0 92.9 <br />91.4 1.6 80-120 <br />1 20 <br />Severn Trent Laboratories, Inc. <br />STL San Francisco' 1220 Quarry Lane, Pleasanton, CA 94566 <br />A pan of Severn Trent Plc Tel 925 484 1919 Fax 9254841096'www.stl-inc.com' CA DHS ELAP#2496 <br />03/21/2005 15:25 <br />Page 4 of 4 <br />