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STLSubmission #: 2003-11-0639 <br /> CAM 17 metals <br /> Geomatrix Consultants <br /> Attn.: Robert Cheung <br /> 2101 Webster Street, 12th Floor <br /> Oakland, CA 94612 <br /> Phone: (510) 663-4299 Fax: (510) 663-4141 <br /> Project: 7066.001 Received: 11/18/2003 17:50 <br /> Tracy Gravel Pits <br /> Site: 26805 South MacArthur Dr,Tracy,CA,9557E <br /> Batch QC Report <br /> Prep(s): 7471 A Test(s): 7471 A <br /> Matrix Spike ( MS/MSD ) Soil QC Batch #2003/11/19-06.16 <br /> GMX-20-1.0 >> MS Lab ID: 2003-11-0639 - 001 <br /> MS: 2003/11/19-06.16-068 Extracted: 11/19/2003 Analyzed: 11/24/200313:59 <br /> Dilution: 1.00 <br /> MSD: 2003/11/19-06.16-069 Extracted: 11/19/2003 Analyzed: 11/24/200314:01 <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 /> Mercury 0.617 10.624 ND 0.490 125.9 127.3 1.1 85-115 1 20 mso mso <br /> Severn Trent Laboratories, Inc. 12/10/200316:55 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton,CA 94566 <br /> A Part of Severn Trent Pc Tel 925 484 1919 Fax 925 484 1096'www.stl-inc.com`CA DHS ELAP#2496 Page 26 of 28 <br />