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Sierra <br /> Environmental <br /> kuality Control Report Monitoring, Inc. <br /> to Addendum to SEM Report Number. 41237 Project ID: KEF01062540 <br /> ' Parameter LCS, % MS, % MSD, % RPD, % Method Blank <br /> Recovery Recovery Recovery <br /> Cadmium-ICP-MS 104.0 160.5 136.4 16.21 <1 mg/Kg <br /> ' Chromium-ICP-MS 104.0 155.1 130.6 17.15 <1 mg/Kg <br /> Lead-ICP-MS 104.0 164.6 140.8 15.55 <1 mg/Kg <br /> ' Nickel-ICP-MS 104.0 160.3 134.8 17.32 <1 mg/Kg <br /> zinc-ICP-MS 103.0 154.5 129.3 17.77 <5 mg/Kg <br /> 1 <br /> 1 <br /> Legend.LCS,Laboratory Control Standard,MS,Matrix Spike,MSD,Matrix Spike Duplicate, <br /> RPD,Relative Percent Difference <br /> t Wednesday,June 27,2001 1135 Financial Blvd. Page I of I <br /> Reno, NV 89502-2348 John Kobza, Ph.D. <br /> William F. Pillsbury Phone(775)857-2400 John C. Seher <br /> ' President FAX(775) 857-2404 Managers <br /> sem@sem-analytical.com <br />