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• GEER <br /> GENESIS ENGINEERING&REDEVELOPMENT <br /> equipment failing calibration specifications will be identified with a red warning label and <br /> will not be used for sample analysis. <br /> Equipment requiring calibration will have an assigned record number that is permanently <br /> affixed to the instrument. A label will be affixed to each instrument containing the following <br /> information: <br /> • Description <br /> • Manufacturer <br /> • Model number <br /> • Serial number <br /> • Date of last calibration or maintenance <br /> • Name of person who performed calibration or maintenance <br /> • Data of next servicing <br /> Should the selected contracted analytical laboratory have a more stringent preventive <br /> maintenance plan for their equipment, then the Project Manager may approve the analytical <br /> • laboratory's plan. <br /> 7.2 Internal Quality Control Checks and Frequency <br /> Field and laboratory QC data are necessary to determine precision and accuracy of the <br /> analyses. At least 10 percent of each data set generated will be composed of field and <br /> laboratory QC data. Field QC samples for this project will consist of trip blanks; duplicate, <br /> split, or replicate samples; and laboratory QC samples. Laboratory QC samples will consist <br /> of method blanks, standards, laboratory control samples, Matrix Spikes ("MS"), Matrix <br /> Spike Duplicates("MSD"), and/or surrogate spikes. <br /> 7.2.1 Field Quality Control Samples <br /> QC samples are collected or prepared in order to provide data verifying that the sampling and <br /> analytical systems used in support of project activities are in control limits and to verify the <br /> quality of the data generated from these activities. Field QC samples for this project will <br /> consist of trip blanks; and duplicate, split, or replicate samples. <br /> • One field duplicate will be collected for every 20 soil samples collected, or one <br /> during each sampling event if less than 20 samples are obtained at a time. For soil <br /> samples, field duplicates are two samples taken from the same soil medium. Field <br /> duplicate Relative Percent Difference ("RPD")will be calculated as detailed in <br /> • Section 8.3.1. Field duplicate RPD goals are defined as within 25 percent for <br /> William DePaoli Property 8 of 21 <br /> Quality Assurance Project Plan <br /> February 2012 <br />