EPA posted its final implementation rule for the 2015 ozone
standard on its website November 8, 2018, the day after it was
signed by Andrew Wheeler. The final rule, like the proposed rule
published in November 2016, retains many of the provisions from the
implementation rule for the 2008 ozone standard, including
provisions related to SIP submittal deadlines, modeling and
attainment demonstration requirements, Reasonable Further Progress
(RFP), Reasonably Available Control Technology (RACT), and
Reasonably Available Control Measure (RACM) requirements, and
ambient monitoring requirements.
New provisions from the 2016 proposal that were retained in the
final rule include allowing states to use inter-precursor emissions
trading and requiring state agencies to consider the impacts of
in-state emission sources located outside the nonattainment area
and require control measures on those sources if necessary to
achieve attainment by the deadline. EPA's final rule
