Which factor is essential in the containment strategy for asbestos?

The essential factor in the containment strategy for asbestos is implementing physical barriers to prevent fiber release. This approach is critical because asbestos fibers can become airborne during disturbance, posing significant health risks to workers and the public. Physical barriers, such as containment structures, seals, and negative pressure environments, effectively isolate the work area and prevent asbestos fibers from escaping into the surrounding environment. This ensures the safety of both the workers involved in the removal or repair of asbestos-containing materials and individuals nearby. The emphasis on containment reflects a fundamental principle in asbestos management that prioritizes minimizing exposure over aesthetic or operational considerations.