The U.S. Environmental Protection Agency (EPA) published a notice of intent to approve several revisions to the State Implementation Plan (SIP) for the State of Vermont (VT). Specifically, the EPA is proposing to approve:

  • Two revisions incorporated by the Vermont Department of Environmental Conservation (VT DEC) in its Prevention of Significant Deterioration (PSD) permit program regulations in Air Pollution Control Regulation (APCR) Chapter 5. These revisions were made by the VT DEC in order to meet the requirements of EPA's conditional approval for Vermont's infrastructure SIPs (ISIPs). In the current regulatory action, the EPA is also proposing to convert its conditional approval of the Vermont's ISIPs to a final approval.
    1. APCR § 5-101, Definitions - definition of "significant" revised to include nitrogen oxides (NOx) and volatile organic compounds (VOC) as precursors to ozone and
    2. APCR § 5-502, Major Stationary Sources and Major Modification - revised to require the use of methodology in 40 Code of Federal Regulations (CFR) 51.166 for determining the amount of PSD increment available to a new or modified major source.
  • Non-attainment New Source Review (NNSR) and PSD permit program requirements in APCR § 5-501 and 5-502. These require an alternative site analysis to be completed for projects either proposing major sources or modifications in a nonattainment area or proposing a source or modification that is major for ozone and/or precursors to ozone.
  • Revisions to APCR § 5-231, Prohibition of Particulate Matter, that require process operations to take precautions to prevent airborne particulate matter and that replace the term "Asphalt Concrete Plant" with the term "Hot Mix Asphalt Plant." in APCR § 5-231(5).
  • Revisions to the work practice standards in APCR § 5-253.16, Wood Furniture Manufacturing, that limit the use of conventional air spray guns only when all emissions from the finishing application station are routed to a control device.
  • Revisions to APCR § 5-404, Methods for Sampling and Testing of Sources, that add 40 CFR 51, Appendix M as an additional testing option for sources required to perform stack testing.

More information on the revisions proposed to be approved can be found here.