Foreign material is defined as material that is not part of a system or component as designed. This includes dirt, debris, broken or missing parts, slag, tools rags, liquids/chemicals, lapping compounds, grinding particles and any other item that would affect the intended operation of a system or component 

All personnel shall assume responsibility for preventing the introduction of foreign material into systems. This will minimize damage or harmful effects. Such as corrosion, fuel damage, component malfunction, or failure, changes in chemistry. Reduced heat transfer, increased radiation levels, changes in system flow characteristic and improper contact operation. 

Specific actions include the following:

Work packages will be planned using field walk downs to determine specific FME recommendations 

If temporary dams are installed which will not be readily visible upon system closure, verification of removal shall be included in the checklist.