Which term defines the legal maximum average exposure to a chemical in a workday?

Which term defines the legal maximum average exposure to a chemical in a workday?

• A. Threshold Limit Value
• B. Permissible Exposure Limit
• C. Short-Term Exposure Limit
• D. Exposure Ceiling

Answer: (B)

The concept being tested is the legally enforceable limit on the average amount of a chemical a worker can be exposed to over a workday. That limit is the Permissible Exposure Limit, set by regulatory bodies to protect worker health on an 8-hour time-weighted average (and overall 40-hour week for applicable substances). If exposure approaches or exceeds the PEL, controls such as engineering measures or PPE are needed to reduce it. It differs from other limits: a Threshold Limit Value is a recommended guideline (not legally binding) from ACGIH; a Short-Term Exposure Limit caps exposure for brief periods (often 15 minutes) rather than the full day; and an Exposure Ceiling is an instantaneous maximum never to be exceeded.

The concept being tested is the legally enforceable limit on the average amount of a chemical a worker can be exposed to over a workday. That limit is the Permissible Exposure Limit, set by regulatory bodies to protect worker health on an 8-hour time-weighted average (and overall 40-hour week for applicable substances). If exposure approaches or exceeds the PEL, controls such as engineering measures or PPE are needed to reduce it.

It differs from other limits: a Threshold Limit Value is a recommended guideline (not legally binding) from ACGIH; a Short-Term Exposure Limit caps exposure for brief periods (often 15 minutes) rather than the full day; and an Exposure Ceiling is an instantaneous maximum never to be exceeded.