Which sequence describes the required actions when ambient air outside containment exceeds the threshold?

• A. Stop removal, mist air with amended water, cleanup all debris, locate and repair containment breach
• B. Resume removal after a short delay
• C. Ventilate the area and continue without changes
• D. Record the reading and proceed as normal

Answer: (A)

When ambient air outside containment exceeds the threshold, the immediate priority is to control the release of asbestos and protect workers. Stopping the removal prevents any further dust from escaping. Wetting the area with amended water helps suppress any dust that might already be airborne, making cleanup more effective. Thoroughly cleaning up debris ensures there are no loose fibers that could become airborne later. Finally, locating and repairing the containment breach restores the barrier and the integrity of the controlled area, so you can reestablish proper containment and air monitoring before resuming work.

Resuming removal after a short delay doesn’t address the risk of ongoing release, ventilating and continuing without changes may spread contamination, and recording the reading while proceeding as normal ignores the hazard and could allow exposure.