R.I. Gen. Laws § 23-24.9-9.2
Rhode Island dental offices and vocational dental education programs shall use and instruct on the use of best management practices to minimize the presence of elemental mercury, unused amalgam, and waste amalgam in their wastewater discharge and in their solid waste. The department shall develop best management practices that include a requirement for an amalgam removal efficiency of at least ninety-nine percent (99%). The department shall define the required best management practices by January 1, 2007. DEM shall consult with the Narragansett Bay Commission, the Rhode Island Dental Association and other interested parties during the development of the best management practices. Dental offices shall comply with the best management practices.
R.I. Gen. Laws § 23-24.9-9.2