2008 8-hour Ozone NAAQS Implementation Rule and Rescission of the 1997 Ozone NAAQS -Signed 2/13/2015

http://www.epa.gov/air/ozonepollution/actions.html#impl

Implementing the 2008 8-hour Ozone National Ambient Air Quality Standards

SUMMARY Excerpt: The EPA is establishing a final rule for implementing the 2008 NAAQS that was promulgated on March 12, 2008. This final rule addresses a range of nonattainment area state implementation plan (SIP) requirements for the 2008 ozone NAAQS…and the timing of SIP submissions and of compliance with emission control measures in the SIP. Other issues also addressed in this final rule are the revocation of the 1997 ozone NAAQS and anti-backsliding requirements that apply when the 1997 ozone NAAQS are revoked.