What Is the Threshold Limit Value (TLV) for Asbestos?
What is the threshold limit value (TLV) for asbestos?
The American Conference of Governmental Industrial Hygienists (ACGIH) recommended exposure limit for asbestos is:
Time weighted average: 0.1 fibers per cubic centimeter (f/cc). OSHA would list this as the permissible exposure limit or PEL.
The ACGIH defines a respiratory fiber as a fiber longer than 5 microns and at least three times as long as their diameter as determined by the membrane filter method at 400-450 X magnification using phase contrast illumination.
The TLV basis for the recommendation is pneumoconiosis, lung cancer and mesothelioma.