On September 29, 2017, the Rhode Island Department of Environmental Management (RIDEM) issued a notice of intent to revise the Air Pollution Control Regulation (APCR) No. 9, Air Pollution Control Permit in order to make it consistent with current federal permitting requirements for major sources. Specifically, the proposed revisions include the following.

  • Updated the definition of "Regulated NSR pollutant" to include condensable particulate or gaseous emissions;
  • Removed the references to permitting requirements solely due to exceedance of certain levels of greenhouse gas (GHG) emissions;
  • Added 24-hour and annual increments for particulate matter that have a dimeter of 2.5 micrometers or less (PM2.5) in the definition of "Increment" in the Prevention of Significant Deterioration (PSD) permitting section of the regulation;
  • Added nitrogen oxides (NOx) as a precursor to ozone in the definition of "Major Stationary Source" in the PSD section of the regulation;
  • Amended the definition of "Baseline Concentration" to include allowable emissions from those major sources that commenced construction after the major source baseline date, but did not start operation before the minor source baseline date for a specific pollutant.
  • Revised the definitions of "Major Source Baseline Data" and "Minor Source Baseline Date" to include the respective baseline dates for PM2.5; and
  • Added the National Ambient Air Quality Standard (NAAQS) for 24-hour and annual PM2.5 to the table in Section 9.9.5 of the regulation.

Written comments on the proposed revisions may be submitted to the RIDEM by 4:00 PM on October 30, 2017 by email or mail. Emailed comments should be sent to karen.slattery@dem.ri.gov. Comments sent via standard mail should be addressed to: Karen Slattery, Principal Air Quality Specialist, Department of Environmental Management, Officer of Air Resources, 235 Promenade Street, Providence, RI 02908.

Additional details regarding the proposed revisions can be found here.