Summary
EPA is proposing to approve, as a revision of the California state implementation plan (SIP), the State's request to redesignate the Chico nonattainment area to attainment for the 2006 24-hour fine particulate matter (PM2.5) national ambient air quality standard. The EPA is also proposing to approve the PM2.5 maintenance plan and the determination that contributions from motor vehicle emissions to the PM2.5 pollution in the Chico nonattainment area are insignificant. The EPA is proposing this action because the SIP revision meets the requirements of the Clean Air Act and EPA guidance for such plans. We are taking comments on this proposal and plan to follow with a final action.
Action
Proposed rule.
Dates
Any comments must arrive by June 8, 2018.
For Further Information Contact
Ginger Vagenas (vagenas.ginger@epa.gov), EPA Region IX, 415-972-3964.