National Emission Standards for Hazardous Air Pollutants for Primary Aluminum Reduction Plants

EPA is amending the national emission standards for hazardous air pollutants (NESHAP) for primary aluminum reduction plants. The amendments will revise the emission limit for polycyclic organic matter (POM) applicable to one potline subcategory. The amendments will revise the compliance provisions to clarify the dates by which all plants must meet the NESHAP requirements, and to specify the time allowed to demonstrate initial compliance for a new or reconstructed potline, anode bake furnace, or pitch storage tank as well as an existing potline or anode bake furnace that has been shutdown and subsequently restarted. We are making these amendments to reduce compliance uncertainties and improve understanding of the NESHAP requirements.