Arkansas Infrastructure SIP Revision and NAAQS SIP

Under the Clean Air Act (CAA) sections 110(a)(1) and 110(a)(2), each state is required to submit a SIP (State Implementation Plan) that provides for the implementation, maintenance, and enforcement of a revised primary or secondary NAAQS (National Ambient Air Quality Standard). CAA section 110(a)(1) and section 110(a)(2) require each state to make this new SIP submission within three years after the Environmental Protection Agency (EPA) promulgates a new or revised NAAQS. The requirement for a NAAQS SIP was established by Act 1302 of 2013 and codified in Ark. Code Ann. §§ 8-4-317 and 8-4-318. DEQ fully considered State requirements during NAAQS SIP development.

DEQ has completed a SIP revision to address the EPA's revisions to the 2006 NAAQS for fine particulate matter (PM2.5), 2008 NAAQS for ozone (O3), 2008 NAAQS for lead (Pb), 2010 NAAQS for nitrogen dioxide (NO2), and 2010 NAAQS for sulfur dioxide (SO2) The SIP development process included revisions to the Arkansas Pollution Control and Ecology Commission (APC&EC) Regulation 19, Regulations of the Arkansas Plan of Implementation for Air Pollution Control, specifically with regard to permitting situations under the Prevention of Significant Deterioration (PSD) program. APC&EC adopted these changes on August 22, 2014. DEQ also addressed EPA’s revised 2012 PM2.5 NAAQS by expanding the applicability of the revised NAAQS approved in the August 2014 rulemaking to non-PSD permitting situations.

The SIP development public participation process has ended and the SIP revision has been submitted to the EPA for review.

Links to the final infrastructure and NAAQS SIP and comments received on the SIP are provided below.

Final Infrastructure SIP and NAAQS SIP

Stakeholder Feedback and Additional Resources

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