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r <br /> AEGIS ENVIRONMENTAL, INC <br /> STANDARD OPERATING PROCEDURES <br />' RE LABORATORY ANALYTICAL QUALITY ASSURANCE AND CONTROL <br /> SOP-3 <br />' LABORATORY ANALYTICAL QUALITYASSURANCE AND CONTROL <br /> In addition to routine calibration of the analytical instruments <br /> with standards and blanks, the laboratory analyst is required to <br /> run duplicates and spikes on ten (10) percent of the analyses to <br /> insure an added measure of precision and accuracy. Accuracy is <br /> also verified through the following: <br /> 1. U.S. Environmental Protection Agency (EPA) and State <br /> certification programs; <br /> 2 . Participation in an inter-laboratory or "round-robin" quality <br /> assurance program; <br /> i3 . Verification of results with an alternative method. For <br /> example, calcium may be determined by atomic absorption, ion <br /> chromatography, or titrimetric methods. Volatile organic <br /> compounds may be determined through either purge and trap or <br /> liquid-liquid extraction methods; and, <br /> 4 . Miscellaneous checks of equipment accuracy. Where trace <br /> analysis is involved, purity of the solvents, reagents and <br /> gases employed is of great concern. The laboratory maintains <br />' a service contract on all major instrumentation, including gas <br /> chromatograph, atomic absorption, ion chromatography and total <br /> organic carbon analyzers. Each of these instruments are <br /> serviced and maintained regularly. <br /> SOP-3/Oct 1990 <br />