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S L <br /> T T Submission: 2005-03-0627 <br /> . 1 <br /> 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 Received: 03/18/2005 17:20 <br /> Shell SAP Number 136143 <br /> Site: 4315 Waterloo Street, Stockton, CA <br /> Batch QC Report <br /> Prep(s): 5030B Test(s):8260B <br /> Matrix Spike( MS/MSD) Soil QC Batch#2005/03/28-2A.62 <br /> D-4-5' >> MS Lab ID: 2005-03-0627-017 <br /> MS: 2005/03/28-2A.62-043 Extracted:03/28/2005 Analyzed: 03/28/200512:43 <br /> Dilution: 1.00 <br /> MSD: 2005/03/28-2A.62-010 Extracted:03/28/2005 Analyzed: 03/28/200513:10 <br /> Dilution: 1.00 <br /> Compound Conc. mg/Kg Spk.Level Recovery% Limits% Flags <br /> MS MSD Sample mg/Kg MS MSD RPD Rec. RPD MS MSD <br /> Methyl tert-butyl ether 0.0526 0.0523 ND 0.048449 108.6 108.8 0.2 65-165 20 <br /> Benzene 0.0476 0.0484 ND 0.048449 98.2 100.7 2.5 69-129 20 <br /> Toluene 0.0549 0.0545 ND 0.048449 113.3 113.4 0.1 70-130 20 <br /> Surrogate(s) <br /> 1,2-Dichloroethane-d4 493 498 500 98.6 99.6 76-124 <br /> Toluene-d8 530 516 500 106.0 103.2 75-116 <br /> Severn Trent Laboratories, Inc. 03/28/2005 14:57 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton,CA 94566 <br /> A part of Sevem Trent Plc Tel 925 484 1919 Fax 925 484 1096'www.sti-inc.com'CA DHS ELAP#2496 Page 38 of 39 <br />