To ensure compliance with NR 447 the following work practices are required when performing asbestos abatement.

• Asbestos abatement contractors should adequately wet the ACM to prevent visible emissions (VEs). The absence of VEs is not sufficient evidence that the ACM is adequately wet.

• Wetting that would unavoidably damage equipment is not required if the owner/operator supplies the department sufficient information explaining the situation. When the department determines that such damage is unavoidable, the asbestos abatement contractor should use a local exhaust ventilation and collection system designed and operated to capture the particulates produced by the stripping and removal of the friable ACM. The system shall exhibit no VEs to the outside air. The asbestos abatement contractor must receive written approval from DNR before starting the project.

• All ACM must remain adequately wet when collected, contained, treated for disposal and transported.

• All ACM must be sealed in leaktight containers. For materials that will not fit without additional breakage, leaktight wrapping may be used.



• All asbestos containing waste material shall be deposited as soon as practical at an approved waste disposal site licensed by the DNR under section NR 506.10, Wis. Adm. Code Outofstate disposal sites shall be operated in conformance with 40 CFR Part 61, Subpart M, section 61.152.