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The U.S. Environmental Protection Agency (EPA) Approves Kentucky Infrastructure Requirements for the 1997 8-Hour Ozone National Ambient Air Quality Standards (NAAQS)


Section 110 of the Clean Air Act requires states to submit State Implementation Plans (SIPs) to provide for the implementation, maintenance and enforcement of a new or revised NAAQS.  Specifically, the Act lists specific elements that states must meet for “infrastructure” requirements, such as modeling, monitoring, and emissions inventories that are designed to assure attainment and maintenance of the new or revised NAAQS, commonly referred to as “infrastructure” SIPs.  In 1997, EPA finalized a new NAAQS for ozone based on 8-hour average concentrations.  Kentucky, through DAQ, provided an infrastructure SIP submittal for this new NAAQS to EPA on December 13, 2007.  On July 13, 2011, EPA approved Kentucky’s infrastructure submittal finding that the Kentucky SIP addressed all required infrastructure elements for the 1997 8-hour ozone NAAQS and was consistent with Section 110 of the Clean Air Act.

In responding to comments, EPA acknowledged that the 8-hour ozone NAAQS was revised in 2008.  EPA stated that the July 13, 2011 approval was limited to the 1997 ozone infrastructure requirements and infrastructure requirements for the 2008 ozone NAAQS would be addressed in a separate rulemaking.

To view a complete PDF of the Third Quarter 2011 issue of the Air Quality Letter, click HERE.


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