What Are Some Commonly Used Terms in Establishing Exposure Levels?
Several terms are commonly used to describe acceptable exposure levels:
NOAEL: The highest exposure level at which no adverse effects are observed. RfD: An estimate of a daily exposure to the human population that is likely to be without an appreciable risk of harmful effects during a lifetime. TLV: Occupational exposure limits set by professional organizations, such as the ACGIH. PEL: Regulatory limits on the amount or concentration of a substance in the air, established by OSHA for workplace exposures.
