Which statement about the final re-occupancy air sample is true?

• A. It is used to determine if the area meets clearance criteria before re-occupancy
• B. It is used to check the color of dust
• C. It is used to sample moisture content
• D. It is done before any removal starts

Answer: (A)

The key idea is clearance testing after the work is done. The final re-occupancy air sample is collected only after all removal and cleaning/decontamination are finished, and it is used to determine whether the airborne asbestos fiber concentration meets the established clearance criteria so the space can be safely re-occupied. This sample serves as the verification that the area has been cleaned to the required standard; if the results meet the criteria, people can return. It’s not about judging the color of dust or moisture content, and it isn’t collected before any removal starts—that pre-abatement sampling is done to assess initial conditions, not to approve re-occupancy.