GBB has performed several assignments for the National Association of Demolition Contractors (NADC), including a white paper on the status of the demolition industry that has been distributed to its members, state agencies, and legislators nationwide. GBB developed a detailed database on published C&D waste composition information; prepared a national database on the demolition waste landfill regulations in each state; and reviewed test data from third party reports on leachate purported to have originated from C&D waste landfills.