Which of the following is not a method of asbestos abatement?

Containment is primarily a technique used during asbestos abatement rather than a method of abatement itself. The purpose of containment is to create a controlled environment where asbestos fibers cannot be released into the air during the removal, encapsulation, or enclosure processes. It involves measures such as sealing off the work area and using negative pressure to filter the air, but it does not directly remove or remediate asbestos.

On the other hand, removal involves physically taking out asbestos-containing materials, encapsulation applies a sealant to prevent fiber release, and enclosure involves constructing barriers around asbestos materials to prevent exposure. Each of these methods directly contributes to the abatement of asbestos hazards, therefore making containment distinct as a supportive rather than a primary abatement method.