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LABORATORY CONTROL SAMPLE <br />QUALITY CONTROL REPORT <br />Analyzed By: J. Creager <br />Reviewed By: J. Creager <br />I wining laboratories, Inc. Examination Number: <br />69905996.1-5 <br />Constituent <br />MB <br />Result <br />Spike <br />Level <br />LCS <br />Result <br />LCSD <br />Result <br />LCS <br />% Rec <br />LCSD <br />% Rec. <br />RPD <br />DIESEL <br />NO <br />25 <br />21.9 <br />22.2 <br />87.6 <br />88.7 <br />1.2 <br />AROCLOR 1016 <br />NO <br />.15 <br />.123 <br />.106 <br />82.0 <br />70.9 <br />15 <br />AROCLOR 1260 <br />NO <br />.15 <br />.141 <br />.132 <br />94.1 <br />87.7 <br />7 <br />EXPLANATIONS: <br />All concentrations in mg/Kg: Milligrams per kilogram (ppm) <br />Method Blank: The method blank is used to determine if method analytes or other interferences are <br />present in the laboratory environment, the reagents or apparatus. <br />Laboratory Control Sample: A laboratory control sample is generated by spiking the analyte into a relatively inert <br />matrix (clean sand or blank water). The laboratory control sample is analyzed <br />exactly like a sample, and its purpose is to determine whether the methodology is in <br />control and whether the laboratory is capable of making accurate and precise <br />measurements. <br />Rev. 3 05/87 (QC.WKS) <br />