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On January 11, 2016, U.S. Environmental Protection Agency (EPA) approved portions of the Infrastructure and Interstate Transport State Implementation Plan (infrastructure-SIP or i-SIP) for the 2010 Sulfur Dioxide (SO2) National Ambient Air Quality Standards (NAAQS) submitted by the Texas Commission of Environmental Quality (TCEQ) on May 6, 2013.  You can view the document here.  The i-SIP submitted by the TCEQ addressed the requirements in the Federal Clean Air Act (CAA) Sections 110(a)(1) and (2) as applicable to the strengthened SO2 NAAQS promulgated in 2010.

The approved portions of the i-SIP include, but not limited to, Texas' provisions on the enforceable emission limitations, control measures, air quality monitoring and modeling, permitting program, emission reporting, and public participation.  EPA has not yet approved the TCEQ's technical demonstration to support the Texas' compliance with the requirements in CAA related to interstate pollution transport affecting attainment and maintenance of the NAAQS.  Additionally, the other portion of the i-SIP not yet approved by the EPA is the Section related to visibility protection.

The full 2013 i-SIP submitted by the TCEQ can be found here.

Trinity will provide updates on the i-SIP as more information is provided by the regulatory agencies.  In the meantime, if you have any questions regarding the SO2 NAAQS i-SIP and how it may affect your future permitting actions, please contact us at (972) 661-8100.