(1) At the conclusion of any asbestos project conducted in a facility, the owner of the facility or the owner's designee shall sample and analyze the air to ensure that the indoor concentration of airborne fibers in a nonoccupational setting for each of five samples is less than or equal to 0.01 fibers per cubic centimeter of air or 70 structures per square millimeter of filter. Clearance sampling is not required if an asbestos project in a facility has occurred immediately prior to demolition of the entire facility, and the facility is not reoccupied prior to demolition. The five air samples must be taken in accordance with the Montana Asbestos Work Practices and Procedures Manual.

(2) The department may approve alternate work practices.