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Participation on an int.erlaboratory or "round-robin" <br /> quality assurance program. <br /> . Verification of results with an alternative method. For <br /> example, calcium may be determined by atomic absorption, <br /> ion chromatography, or titrimetric methods. Volatile or- <br /> ganics may be determined through either purge and trap or <br /> liquid-liquid ext}act.i opt methods. <br /> 3 . � Miscella*:eous Checks OC �►ccuraS <br /> ,here }race analysis is invo %red, purity of the solvents, re- <br /> agents and gases employed is of great concern. The laboratory <br /> maintains a service contract on all major instrumentation; gas <br /> chromatograph, atomic absorption, ion chromatography, and total <br /> organic carbon analyzers are all serviced and maintained regular- <br /> ly. <br /> :he above program is more than sufficient. for most needs. Addi- <br /> tional quality assurance such as spikes and duplicates on all <br /> analyses, will be provided if requested. <br /> Pape! 3 <br />