National Emission Standards for Hazardous Air Pollutants and New Source Performance Standards: Petroleum Refinery Sector Amendments

This action proposes amendments to the National Emission Standards for Hazardous Air Pollutants (NESHAP) Refinery MACT 1, which was published in the Federal Register on December 1, 2015, and subsequently amended on July 13, 2016. The December 1, 2015, action was the result of a risk and technology review in which the Environmental Protection Agency (EPA) finalized amendments to Refinery MACT 1 and Refinery MACT 2. The July 13, 2016, action finalized technical corrections and clarifications, as well as changes to compliance dates for various emission sources, including the maintenance vent standards that apply during periods of startup, shutdown, maintenance, or inspection. In this action, the EPA is proposing to amend the compliance dates for maintenance vents to January 30, 2019. These proposed revisions do not affect any other requirements in the December 1, 2015, or July 13, 2016, final actions. This proposed action will have an insignificant effect on emissions reductions and no effect on costs.