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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 />Prep(s): 5030B <br />Matrix Spike ( MS / MSD ) <br />MS/MSD <br />MS: 2005/03/26-1 A.62-049 <br />MSD: 2005/03/26-1 A.62-015 <br />Submission: 2005-03-0627 <br />Received: 03/18/2005 17:20 <br />Site: 4315 Waterloo Street, Stockton, CA <br />Batch QC Report <br />Soil <br />Extracted: 03/26/2005 <br />Extracted: 03/26/2005 <br />Test(s): 8260B <br />QC Batch # 2005/03/26-1A.62 <br />Lab ID: <br />2005-03-0547 - 029 <br />Analyzed: <br />03/26/2005 19:49 <br />Dilution: <br />1.00 <br />Analyzed: <br />03/26/2005 20:15 <br />Dilution: <br />1.00 <br />Compound <br />Conic. mg/Kg Spk.Level Recovery % Limits % Flags <br />MS <br />MSD <br />Sample mg/Kg MS <br />MSD <br />RPD Rec. <br />RPD MS <br />MSD <br />Methyl tert-butyl ether <br />0.0524 <br />0.0475 <br />ND 0.05 104.8 <br />95.0 <br />9.8 65-165 <br />20 <br />Benzene <br />0.0479 <br />0.0533 <br />ND 0.05 95.8 <br />106.6 <br />10.7 69-129 <br />20 <br />Toluene <br />0.0525 <br />0.0588 <br />ND 0.05 105.0 <br />117.6 <br />11.3 70-130 <br />20 <br />Surrogate(s) <br />1,2-Dichloroethane-d4 <br />512 <br />506 <br />500 102.4 <br />101.2 <br />76-124 <br />Toluene -d8 <br />538 <br />551 <br />500 107.6 <br />110.2 <br />75-116 <br />Severn Trent Laboratories, Inc. <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 <br />03/28/2005 14:57 <br />Page 36 of 39 <br />