Follow all the proper regulations.
There are rules and regulations when it comes to commercial demolition, so make sure you (and your contractor) are aware of them and follow them accordingly.
The Clean Air Act requires that all National Emission Standards for Hazardous Air Pollutants (NESHAP) regulations be followed. These regulations require the owner/operator of the building to notify the proper state department before any demolition (or renovation) of commercial buildings that may contain asbestos takes place. In addition, certain operations are prohibited from releasing any visible emissions into the air. They are also required to follow specific air cleaning and hazardous waste removal procedures.