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AEGIS ENVIRONMENTAL, TNC. <br /> STANDARD OPERATING PROCEOQRER <br /> RE: LABORATORY AHALYT:rCAL QUALITY ASSURANCi AND CONTROL <br /> SOP-5 <br /> u 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 10 percent of the analyses to insure <br /> an added measure of precision and accuracy. Accuracy is also <br /> _ 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 /> u 3 . 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 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 /> SCP-5/cct. 5940 <br />