B. Quantity. The amount of contaminant present and how often it will be processed at a station are important considerations. For a given material, a very small amount processed infrequently will generally pose much less risk than a large amount processed frequently.
C. Type. The nature of the contaminant may pose different risks for different technologies. For example, gold is a lifetime killer for electronic devices but is the most common biocompatible electrode materials in bioanalytical devices.
After examination of the material, equipment flow, and transfer risks, define the controls to manage these risks. Examples: