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Gas/BTEX/MTBE by 8260B (C&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 />D-4-5' >> MS <br />MS: 2005/03/28-2A.62-043 <br />MSD: 2005/03/28-2A.62-010 <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: 03/28/2005 <br />Extracted: 03/28/2005 <br />Test(s): 8260B <br />QC Batch # 2005/03/28-2A.62 <br />Lab ID: <br />2005-03-0627 - 017 <br />Analyzed: <br />03/28/2005 12:43 <br />Dilution: <br />1.00 <br />Analyzed: <br />03/28/2005 13:10 <br />Dilution: <br />1.00 <br />Compound <br />Conc. 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 lert-butyl ether <br />0.0526 <br />0.0523 <br />ND 0.048449 108.6 <br />108.8 <br />0.2 65-165 <br />20 <br />Benzene <br />0.0476 <br />0.0484 <br />ND 0.048449 98.2 <br />100.7 <br />2.5 69-129 <br />20 <br />Toluene <br />0.0549 <br />0.0545 <br />ND 0.048449 113.3 <br />113.4 <br />0.1 70-130 <br />20 <br />Surrogate(s) <br />1,2-Dichloroethane-d4 <br />493 <br />498 <br />500 98.6 <br />99.6 <br />76-124 <br />Toluene -d8 <br />530 <br />516 <br />500 106.0 <br />103.2 <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.st]-inc.com ` CA DHS ELAP# 2496 <br />03/28/2005 14:57 <br />Page 38 of 39 <br />