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s <br /> U <br /> AEGIS ENVIRONMENTAL, INC. <br /> I STANDARD OPERATING PROCEDURES <br /> l RE: LABORATORY ANALYTICAL QUALITY ASSURANCE AND CONTROL <br /> SOP-5 <br /> In addition to routine calibration of the analytical instruments with standards and blariKs, <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 /> i2. 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 methods. <br /> Volatile organic compounds may be determined through either purge and trap or <br /> liquid-liquid extraction methods; and, <br /> i <br /> [ 4. Miscellaneous checks of equipment accuracy. Where trace analysis is involved, a <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 <br /> chromatograph, atomic absorption, ion chromatography and total organic carbon <br /> analyzers. Each of these instruments are serviced and maintained regularly. <br /> t <br /> I AT ACNMENT/90R5/June 1990 <br /> e <br />