State Plan Actions
On Public Notice
Proposed Area Boundary Recommendations for the 2010 Sulfur Dioxide Standard: December 2017 Designations
Missouri is proposing to recommend area designations (e.g. attainment, nonattainment, unclassifiable) for the 2010 1-hour Sulfur Dioxide (SO2) standard. These recommendations address seven areas of the state containing sources identified as meeting criteria specified in the federal Data Requirements Rule (DRR) for future rounds of SO2 designations. The proposed recommendations are based on technical evaluations of these seven areas using air quality modeling. The air program intends to submit these recommendations to EPA by Jan. 13, 2017. EPA must finalize designations for these areas by Dec. 31, 2017. The remaining nine Missouri sources affected by the DRR chose characterization methods other than modeling. These nine are also discussed in this document, but EPA is not required to designate these areas until Dec. 31, 2020. This action will not be submitted for inclusion in the Missouri State Implementation Plan.
Appendix A1 - Meramec
Appendix A2 - Meramec Model Files
Appendix B1 - Asbury
Appendix B2 - Asbury Model Files
Appendix C1 - Montrose
Appendix C2 - Montrose Model Files
Appendix D1 - Sibley
Appendix D2 - Sibley Model Files
Appendix E1 - Sikeston
Appendix E2 - Sikeston Model Files
Appendix F1 - Springfield
Appendix F2 - Springfield Model Files
Appendix G1 - Thomas Hill
Appendix G2 - Thomas Hill Model Files
Appendix H - DRR Modeling Protocol
Appendix I - BASF Potential to Emit Calculations
A public hearing for this boundary recommendation will be held on Oct. 27, 2016. Comments about this plan action will be accepted through close of business on Nov. 3, 2016.
Proposed for Adoption
Area Boundary Recommendation for the 2015 Ozone Standard
In 2015, the U.S. Environmental Protection Agency (EPA) strengthened the 8-hour ozone National Ambient Air Quality Standard (NAAQS) to 70 parts per billion. Missouri is submitting to EPA boundary designation recommendations for this revised standard in accordance with the Clean Air Act and following EPA’s Area Designations Memorandum (Feb. 25, 2016). Nonattainment recommendations are for areas with monitored violations based on 2013 to 2015 data and areas contributing to the violations. All other areas of the state are recommended for an attainment/unclassifiable designation. The air program intends to submit this recommendation to EPA by Oct. 2016, and EPA will designate areas by Oct. 2017. This action will not be submitted for inclusion in the Missouri State Implementation Plan.
A public hearing for this boundary recommendation was held on Aug. 25, 2016. Comments about this plan action were accepted through close of business on Sept. 1, 2016. This plan is scheduled for adoption on Sept. 29, 2016.