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an <br />.. , <br />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 />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 />Matrix Spike ( MS J MSD ) Soil QC Batch # 2005/03/25-1C.62 <br />MS/MSD Lab ID: <br />2005-03-0423 - 008 <br />MS: 2005/03/25-1C.62-017 Extracted: 03/25/2005 Analyzed: <br />03/25/200509:17 <br />Dilution: <br />1.00 <br />MSD: 2005/03/25-1 C.62-044 Extracted: 03/25/2005 Analyzed: <br />03/25/2005 09:44 <br />Dilution: <br />1.00 <br />Compound <br />Conc. mg/Kg <br />Spk.Level Recovery % Limits % Flags <br />MS <br />MSD <br />Sample <br />mg/Kg MS <br />MSD <br />RPD Rec. <br />RPD MS <br />MSD <br />Methyl tert-butyl ether <br />0.0550 <br />0.0612 <br />ND <br />0.05 110.0 <br />124.8 <br />12.6 65-165 <br />20 <br />Benzene <br />0.0533 <br />0.0508 <br />ND <br />0.05 106.6 <br />103.6 <br />2.9 69-129 <br />20 <br />Toluene <br />0.0567 <br />0.0558 <br />ND <br />0.05 113.4 <br />113.8 <br />0.4 70-130 <br />20 <br />Surrogate(s) <br />1,2-Dichloroethane-d4 <br />472 <br />511 <br />500 94.4 <br />102.2 <br />76-124 <br />Toluene -d8 <br />524 <br />527 <br />500 104.8 <br />105.4 <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 15:26 <br />Page 5 of 6 <br />