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' Lntroducuon <br /> ONSITE Environmental Laboratories Inc Revision 0 <br /> ' Quality Assurance Plan February 15, 1995 <br /> Page 3 of 7 <br /> > The use of qualified personnel <br /> ' > Reliable and well-maintained equipment <br /> > Appropriate calibrations and standards Calibration requirements are established for all <br /> ' instrumentation used for analysts This includes the use of traceable or certified reference <br /> materials such as NIST, EPA, or an equivalent source for calibration and QC checks <br /> > Appropriate reagents and supplies The laboratory uses reagent grade chemicals as a <br /> minimum If higher grades are required by the method, the method takes precedence <br /> > The use of surrogates, matrix and blank spikes, second source check standards, and <br /> duplicate analyses <br /> > The use of peer and/or supervisory review of all data inputs, calculations, and reports <br /> M > The close supervision of all operations by management and senior personnel <br /> > The training for ONSITE associates includes a program of"in-house" training and <br /> proficiency of the analysts on analytical procedures, methods, and instrumentation This <br /> training is documented in individual training files <br /> > The laboratory has implemented a comprehensive and straightforward documentation <br /> system <br /> Quality Control <br /> Quality Control consists of the techniques used to assess the quality of the measurement process and <br /> the results ONSITE routinely checks the quality of analytical work through analysts of reference <br /> samples, duplicate samples, and spiked samples Statistically based control limits are established for <br /> each method of analysts and sample matrix Several tools are available for this process <br /> > A system of "control charts" is used to identify shifts, trends, and biases before the <br /> laboratory test is out-of-control Control charts are based upon Shewhart Charts and are <br /> continuing plots of data points from similar samples or processes over time They are used <br /> to determine if a system is in a state of statistical control and to monitor the relative <br /> variability of repetitive reference materials, spiked samples, and the analysis of surrogates <br /> This variability is used to assess the accuracy, precision, and acceptability of measurements <br /> ' > Accuracy and Precision are evaluated on each analytical batch and Completeness is <br /> evaluated by the Laboratory Directors <br /> word 6 0 locium dot <br />