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1 <br /> Sierra <br /> Environmental <br /> �uality Control Report Monitoring, Inc. <br /> in Addendum to SEMReport Number: 41191 Project ID: KLF01062161 <br /> ' Parameter LCS, % MS, % MSD, % RPD, % Method Blank <br /> Recovery Recovery Recovery <br /> Cadmium-ICP-MS 94.8 92.8 100.0 7.51 <1 mg/Kg <br /> Chromium-ICP-MS 92.9 90.8 97.8 7.43 <1 mg/Kg <br /> Lead-ICP-MS 93.2 95.5 102.7 7.34 <1 mg/Kg <br /> Nickel-ICP-MS 95.2 91.7 99.0 7.62 <1 mg/Kg <br /> Zinc-ICP-MS 93.8 93.1 98.8 5.93 <5 mg/Kg <br /> Legend:LCS,Laboratory Control Standard,MS,Matrix Spike,MSD,Matrix Spike Duplicate, <br /> RPD,Relative Percent Difference <br /> Friday,July 06,2001 Page I of I <br /> 1135 Financial Blvd. <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 />