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ti <br /> i <br /> AEGIS ENVIRONMENTAL, INC. <br /> STANDARD OPERATING PROCEDURES <br /> RE: LABOP.ATORY ANALYTICAL QUALITY ASSURANCE AND CONTROL <br /> SOP-5 <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 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 /> 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 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 se--vice contract on all major instrumentation, including gas <br /> -- chromatograph, atomic absorption, ion chifomatography and total <br /> organic carbon analyzers. Each of these instruments are <br /> serviced and maintained regularly. <br /> sop-Slott. 1990 <br /> i <br /> �r <br />