When air monitoring must be conducted under PEL requirements?

The correct answer indicates that air monitoring must be conducted for a duration of 6 months under Permissible Exposure Limit (PEL) requirements. This requirement is based on the understanding that PELs are legally enforceable limits on the amount or concentration of a substance in the air, which are established to protect worker health.

Conducting air monitoring for this extended period helps ensure that any potential exposures are accurately captured and assessed over time, rather than being evaluated based on a short-term snapshot. This is critical in workplaces where hazardous substances are present, as exposure levels can fluctuate due to various operational conditions or activities.

Monitoring over a longer duration allows for a more comprehensive risk assessment, ensuring that any instances of exposure that exceed PELs are adequately identified and addressed. This aligns with best practices in occupational health and safety, where continuous assessment plays a key role in protecting workers from harmful exposure to airborne contaminants.