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a. <br /> AEGIS ENVIRONMENTAL, INC. <br /> STANDARD OPERATING PROCEDURES <br /> RE: LABORATORY ANALYTICAL QUALITY ASSURANCE AND CONTROL <br /> SOP-5 <br /> In addition to routine calibration of the analytical instruments with standards and blanks, <br /> the laboratory analyst is required to run duplicates and spikes on 10 percent of the <br /> analyses to insure 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 certification programs; <br /> 2. Participation in an inter-laboratory or"round-robin" quality assurance program; <br /> 3. Verification of results with an alternative method. For example, calcium may be <br /> determined by atomic absorption, ion chromatography, or titrimetric mothuds. <br /> Volatile organic 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 analysis is involved, <br /> I <br /> purity of the solvents, reagents and gases employed is of great concern. The <br /> ( laboratory maintains a service contract on all major instrumentation, including gas f <br /> chromatograph, atomic absorption, ion chromatography and total organic carbon <br /> analyzers. Each of these instruments are serviced and maintained regularly. <br /> s <br /> r <br /> c <br /> — r <br /> i <br /> r <br /> ATTACHMENT/SOFL511+ne 199D - - <br />