What term is used for the allowable concentration of a hazardous substance in breathing air?

What term is used for the allowable concentration of a hazardous substance in breathing air?

• A. Threshold Limit Value (TLV)
• B. Permissible Exposure Level (PEL)
• C. Short-Term Exposure Limit (STEL)
• D. Acceptable Air Dose

Answer: (B)

The concept being tested is occupational exposure limits for airborne hazards. The allowable concentration of a hazardous substance in breathing air is the permissible exposure limit. This is a legal limit set by OSHA that applies as an eight-hour time-weighted average, with a separate short-term exposure limit for certain substances. PELs are enforceable and expressible in ppm or mg/m3. A threshold limit value is a guideline from ACGIH and not legally enforceable. A short-term exposure limit is a separate, specific 15-minute cap for brief exposures. Acceptable Air Dose isn't a standard term used in this context.

The concept being tested is occupational exposure limits for airborne hazards. The allowable concentration of a hazardous substance in breathing air is the permissible exposure limit. This is a legal limit set by OSHA that applies as an eight-hour time-weighted average, with a separate short-term exposure limit for certain substances. PELs are enforceable and expressible in ppm or mg/m3.

A threshold limit value is a guideline from ACGIH and not legally enforceable. A short-term exposure limit is a separate, specific 15-minute cap for brief exposures. Acceptable Air Dose isn't a standard term used in this context.