Which of the following is NOT one of the five types of response actions for known ACMs?

• A. Removal
• B. Repair
• C. Abatement Certification
• D. Enclosure

Answer: (C)

When dealing with known asbestos-containing materials, the actions to control risk are concrete steps applied to the material itself. The five standard response actions are removal (taking the ACM out of the building), enclosure (installing barriers to isolate the material), encapsulation (applying a sealant to prevent fiber release), repair (fixing damaged areas or small sections to stop fiber release), and operations and maintenance (ongoing practices to manage ACM in place and keep conditions safe). Abatement certification, on the other hand, is a credential or permit requirement for professionals performing abatement, not a method of addressing the ACM itself. So the statement that Abatement Certification is not one of the five response actions is correct because it describes a regulatory credential, not a physical action on the asbestos material.