Final National Emission Standards for Hazardous Air Pollutants: Carbon Black Production and Cyanide Chemicals Manufacturing Residual Risk and Technology Reviews, and Carbon Black Production Area Source Technology Review
Carbon Black Production
EPA has evaluated the risks remaining after fully implementing the 2002 National Emission Standards for Hazardous Air Pollutant (NESHAP) for Carbon Black Production facilities and determined that risks from this source category are acceptable. In addition, the agency identified no developments in practices, processes or control technologies that would further reduce emissions of hazardous air pollutants. EPA is finalizing a rule to broaden the existing emission limit to account for unregulated emissions downstream of the main unit filter. Additionally, EPA has determined the standards continue to provide an ample margin of safety to protect public health and the environment.
EPA is finalizing other minor amendments to the existing regulations. These final amendments clarify that the standards are applicable during periods of startup, shutdown, and malfunction except during defined time periods during startup and shutdown that are regulated buy a work practice standards; require electronic reporting of certain notifications; performance test results; and semiannual reports.
EPA also performed a technology review of the 2007 Carbon Black Production Area Source NESHAP and determined there were no area sources of carbon black production, so we are making no changes to the area source NESHAP.
Cyanide Manufacturing
EPA finalized amendments to the 2002 National Emission Standards for Hazardous Air Pollutants (NESHAP) for the Cyanide Chemicals Manufacturing source category. The Agency evaluated the risks remaining after fully implementing the NESHAP and determined that risks are acceptable, and the standards provide an ample margin of safety to protect public health and the environment. EPA identified no technology-related developments that would lower emissions beyond the original NESHAP. As a result, EPA is not amending the NESHAP as a part of the technology review. However, as a part of our technology review, we did identify previously unregulated emission sources and finalized changes to the NESHAP that add standards for these sources.
EPA is finalizing other changes to the original NESHAP for this source category and has determined that the standards continue to provide an ample margin of safety to public health and the environment.