This action will address the agency's Residual Risk and Technology Review (RTR) of the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Asphalt Processing and Asphalt Roofing Manufacturing. The Asphalt Processing and Asphalt Roofing Manufacturing NESHAP, subpart LLLLL, was promulgated pursuant to section 112(d) of the Clean Air Act (CAA) on May 7, 2003. The NESHAP established emission limitations and work practice requirements based on maximum achievable control technology (MACT) for controlling emissions of hazardous air pollutants (HAP) from asphalt processing and asphalt roofing manufacturing. Asphalt processing facilities produce "blown" asphalt for use in the asphalt roofing manufacturing industry and elsewhere. Asphalt roofing manufacturing facilities produce shingles and roll roofing products by applying the "blown" asphalt to a fiberglass or felt substrate. The HAP emitted from these processes include numerous organic compounds, such as formaldehyde, hexane, phenol, polycyclic organic matter, and toluene. This action will implement the residual risk review requirements of CAA section 112(f)(2) and the technology review requirements of CAA section 112(d)(6). The statute directs the EPA to promulgate emission standards under CAA 112(f)(2) if such standards are required to provide an ample margin of safety to protect public health or to prevent, taking relevant factors into account, an adverse environmental effect. Any such standards are to be promulgated within 8 years after promulgation of MACT standards under CAA section 112(d). CAA section 112(d)(6) requires the EPA to review and revise the MACT standards as necessary, taking into account developments in practices, processes, and control technologies, no less often than every 8 years. This action will also address any other regulatory actions for the source category as deemed appropriate. Pursuant to a court order, the EPA is obligated to complete the final action by 3/13/20.