Except as provided in §D of this regulation, a person or pet may not enter or remain in the work area of a group day care center, residential property, or building appurtenant to a group day care center or residential property, until the Department determines that the lead abatement project has been completed in a satisfactory manner under Regulation .12J, unless that person is: The owner of the building or the owner's designee; The contractor engaged for the lead abatement project and his employees; A State, county, or local enforcement official or his designee; An inspector who represents a lender with a security interest in the building which is being abated; or A federal, State, or local official, or his designee, engaged in research on lead buildings. Exemption. If a renovation process is not reasonably expected to break or disturb any lead based substance, then the requirements of §A do not apply. Except as provided in §D, all persons entering a work area during a lead abatement project which involves the removal of lead paint shall wear: Disposable shoe covers which shall be removed when leaving the work area; and A half-mask air purifying respirator equipped with high efficiency filters during or after the use of a heat-gun or sander equipped with HEPA vacuum. Multiple Family Dwellings. At all times when a lead abatement project is being conducted in a common area of a dwelling occupied by three or more households: Residents and pets shall use alternative entrances and exits which do not require passage through the work area, if such an entrance and exit exists; The contractor shall use all reasonable efforts to create an uncontaminated passage for entrance and egress of all building occupants; and If the entrance and egress to a building can only be through the work area, abatement in common areas shall be conducted between the hours of 9 a.m. to 3 p.m. only, and the work area shall be cleaned with a HEPA vacuum at the end of each working day until all surfaces are free of visible dust and debris.