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This rulemaking will address the agency's residual risk and technology review (RTR) of the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Reinforced Plastics Composites and Boat Manufacturing. The Reinforced Plastics Composites NESHAP, subpart WWWW, was promulgated pursuant to section 112(d) of the Clean Air Act (CAA) on 4/21/03, and the Boat Manufacturing NESHAP, subpart VVVV, was promulgated pursuant to section 112(d) of the Clean Air Act (CAA) on 8/22/01. 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 the production of fiberglass bath tubs, showers, automobile, storage tanks and recreational vehicles (Reinforced Plastics Composites) and the manufacture of fiberglass and aluminum boats (Boat Manufacturing). The HAP emitted from these sources include styrene and methyl methacrylate. 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). CAA 112(f)(2) directs EPA to revise the NESHAP if such revisions 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. 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 RTR is subject to a court-ordered deadline of 3/13/20, for a final rule.

Overall Description of Deadline: Final Rule 3/13/2020--Court Order: United States District Court for the District of Columbia; California Communities Against Toxics, et al. v. Scott Pruitt; Case 1:15-cv-00512-TSC; 3/13/17.