| Background and Post Clearance Sampling: |
A means by which through observation and scientific methods, industrial hygienists are able to attaining historical and current base-line data information for the eventual post clearance testing. Education Note: In catastrophic disasters, such as from fires and floods, much of the historical and base-line data has been destroyed since the building's microflora will have been changed, and new baseline data must be established for the building and its occupants after restoration. See Baseline Data. |