Section 112(f)(2)(A) of the 1990 Clean Air Act Amendments (CAA) requires EPA to evaluate whether emission standards that were previously adopted under the technology-based, Maximum Achievable Control Technology (MACT) program provide an ample margin of safety to protect public health and prevent adverse environmental effects (taking into consideration costs, energy, safety, and other relevant factors). Within 8 years of the promulgation of a MACT standard for the source category, EPA is mandated by the CAA to assess the risks to determine whether additional standards are needed.
EPA’s Office of Air and Radiation has developed a Risk and Technology Review (RTR) Assessment Plan (referred to as RTR II) that has a streamlined approach. The RTR II Plan was reviewed by the SAB in December 2006 [Consultation on EPA’s Risk and Technology Review (RTR) Assessment Plan (EPA-SAB-07-009)]. The SAB identified some key scientific issues and provided recommendations for the Plan. The SAB Panel being formed will review one or more of EPA’s draft risk assessments. These draft risk assessments will evaluate the potential risks to human health and the environment that remain after sources come into compliance with MACT.