For the purposes of this Part, the Indoor Non-Occupational Air Exposure Standard for asbestos exposure shall be 0.01 fibers per cubic centimeter (f/cc) for fibers greater than five (5) microns in length as measured by OSHA-NIOSH phase contrast optical microscopic methods and calculated as an eight (8) hour time weighted average (or 300 nanograms per cubic meter).
216 R.I. Code R. 216-RICR-50-15-1.5