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PRE-TANK- ANK REPLACENERI Site Assessment Work Plan <br /> r 6131 Pacific Ave, Stockton, CA <br /> Aegis Project No. 90-020 <br /> p Page 15 <br /> 4.5.3 Analytical Quality Assurance <br /> in addition to routine calibration of the analytical instruments with <br /> standards and blanks, the analyst is required to run duplicates and <br /> spikes on 10 percent of the analyses to insure an added measure of <br /> precision and accuracy. Accuracy is also verified th•_cugh the follow- <br /> ing: <br /> 1. U.S. Environmental Protection Agency (EPA) and state <br /> certification programs. <br /> 2. Participation in an interlaboratory or "round-robin" quality � . <br /> assurance program. <br /> 3. ''pterification of results with an alternative method. For example, ! <br /> CEcicium may be determined by atomic absorption, ion <br /> cFiromatography, or titrimetric methods. volatile organics may be <br /> determined through either purge and trap or liquid-liquid <br /> t extraction methods. <br /> 4.5.4 Miscellaneous Checks of Accuracy <br /> , ,- Where trace analysis is involved, purity of the solvents, reagents and <br /> gases employed is of great concern. The laboratory maintains a service <br /> contract on all major instrumentation; gas chromatograph, atomic <br /> y. <br /> absorption, ion chromatography, and total organic carbon analyzers are <br /> all serviced and maintained regularly. <br /> u <br /> # The above program is more than sufficient for most needs. Additional E <br /> quality assurance such as spikes and duplicates on all analyses, will <br /> t fi be provided if requested. <br /> I <br /> 3- <br /> L <br /> , <br />