The EPA is provided the attached “ Revised DRAFT Guidance for Ozone and Fine Particulate Matter Permit Modeling (pdf) ” (142 pp, 4.1 MB, 09-20-2021, 454-P-21-001) to the state, local, and Tribal air agencies, as well as the public, for consideration, review and comment. This guidance document reflects the EPA’s recommendations for how a stationary source seeking a PSD permit may demonstrate that it will not cause or contribute to a violation of the National Ambient Air Quality Standards for ozone (O3) and fine particulate matter (PM2.5) and PSD increments for PM2.5, as required under Section 165(a)(3) of the Clean Air Act and 40 CFR sections 51.166(k) and 52.21(k).
The deadline for comment was Friday, November 19, 2021. Following the close of the comment period, the EPA will take into consideration all the feedback and comments submitted and will further engage with the regulatory air quality modeling community on further clarifications, potential amendments, and considerations for additions to the final guidance documentation.
The NTAA created a template letter for Tribes to use to comment. The NTAA also made comment on the revised draft, click here to view our comment letter!