How many air changes per hour are required for interior work that necessitates air adjustment?

The requirement for air changes per hour during interior work that necessitates air adjustment is based on best practices for maintaining a safe and healthy work environment when dealing with potential lead exposure. In the context of lead abatement or renovation projects, ample air changes are critical to dilute any airborne contaminants effectively.

The correct answer of ten air changes per hour is considered appropriate because it helps ensure that any lead dust or particles generated during work are quickly replaced with fresh air. This rate of air exchange assists in minimizing the inhalation risk for workers and others in the vicinity, thereby promoting adherence to health and safety regulations.

Achieving this level of air changes also helps to manage humidity and other environmental factors that might affect the work process, ensuring that conditions remain as stable as possible for both the safety of the workers and the integrity of the project.