all contaminants that are found in the component immediately after manufacture or assembly

all contaminants introduced into a fluid system in operation (vent pipes, cylinder rods, cylinder breathers, etc.) or during external interventions (fluid refilling, opening, etc.)

written description of the part or component cleanliness requirement and the agreed inspection method

procedure for extraction and analysis of contaminant and data reporting that is used to evaluate the cleanliness level of a component as specified by the inspection document