In multi-story buildings where more than 25% of the floor area is undergoing abatement or under demolition in preparation for abatement, the following shall apply:
1. Asbestos abatement is permitted on a floor-by-floor basis, provided that no two consecutive floors are undergoing active abatement simultaneously. A maximum of every other floor, up to a total of three floors out of five, is permitted.
2. A minimum of five clean buffer floors must separate each group from the next five-floor group undergoing abatement.
3. Buffer floors must have all required fire and life safety equipment and fire protective coatings in place.