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MATRIX SPIKE <br /> QUALITY CONTROL REPORT <br /> Analyzed By: G. Barrett Reviewed By: G. Rodri o <br /> 5ampie Matrix: Soil Spiked Sample ID: 7208.1 <br /> T-winingLaboratories, Inc. Examination Number: 700-7208.1- <br /> Constituent Method Sample Spike MS Result MSD MS % MSD RPD <br /> Blank Result Level ResultRec. % <br /> Result <br /> Rec. <br /> Lead (Pb) C0.05 27.2 100 117 108 89.8 80.$ 8.0 <br /> EXPLANATIONS: <br /> Matrix Spike and <br /> Matrix Spike Duplicate: A matrix spike is a sample to which a known amount of analyte has been added. The <br /> percent recovery and the relative percent difference are assessed to determine the <br /> accuracy and precision of the analytical procedure. <br /> ,-205/97 05f@7 (OiC.WK5) <br />