Minnesota Administrative Rules
Agency 144 - Health Department
Chapter 4620 - CLEAN INDOOR AIR
ASBESTOS ABATEMENT
Part 4620.3567 - INSTALLATION OF CRITICAL BARRIERS

A. All objects or structures that cannot be removed from the containment area must be covered with at least one layer of six-mil polyethylene plastic sheeting securely fastened to achieve an airtight seal around the object or structure.

B. All heating, ventilating, and air conditioning intake and exhaust openings in the containment area and any seams in system components must be sealed with at least two layers of six-mil polyethylene sheeting securely fastened to achieve an airtight seal around the object or structure.

C. All penetrations, including penetrations around electrical conduits, telephone wires, water supply pipes, and drain pipes, must be sealed with at least one layer of six-mil polyethylene plastic sheeting securely fastened to achieve an airtight seal around the object.

D. All porous surfaces except ceilings not addressed in items A to C must be sealed with at least one layer of six-mil polyethylene plastic sheeting securely fastened to achieve an airtight seal.

E. All openings between the asbestos abatement containment area and contaminated areas must be sealed with at least one layer of six-mil polyethylene plastic sheeting or comparable material securely fastened to achieve an airtight seal around the opening.

F. If any freestanding containment wall is to be used, the porous outside of the wall frame or frame of the freestanding containment must be covered with at least one layer of six-mil polyethylene sheeting securely fastened to achieve an airtight seal.