What type of air monitoring is typically associated with AHERA compliance activities?

• A. Clearance
• B. Personal Sampling
• C. Real-time monitoring
• D. Emissions sampling

Answer: (A)

Clearance air monitoring is the type of air monitoring typically associated with AHERA compliance activities. After asbestos abatement in a school, air samples are collected and analyzed to verify that airborne asbestos fibers are at or below the required limit before the building is reoccupied. The standard approach uses lab analysis—usually PCM—with a threshold of 0.01 fibers per cubic centimeter. If the results meet this limit, the space passes clearance; if not, cleaning and retesting are needed. This type of monitoring specifically confirms post-abatement air quality for occupancy and differs from personal sampling (which checks worker exposure), real-time monitoring (which provides immediate readings during work), and emissions sampling (which targets emissions from a source).