The DNREC Division of Air Quality will conduct a public hearing (Docket #2022-R-A-0006) on a proposed revision to Delaware’s Second Particulate Matter Limited Maintenance Plan. Public comment period closed.

The hearing will address the Delaware second Particulate Matter Limited Maintenance Plan under the 2006 24-hour Fine Particulate Matter (PM2.5) National Ambient Air Quality Standard (NAAQS).

In December of 2009, the EPA designated the Philadelphia-Wilmington Area as nonattainment for the 2006 24-hour (PM2.5) NAAQS.

In September 2014, the EPA redesignated the area as attainment.

Redesignated areas are required to submit two ten-year maintenance plans to ensure continued attainment with the NAAQS.

This proposed second 10-year Particulate Matter Limited Maintenance Plan ensures that Delaware will continue to maintain the NAAQS through 2035.

The proposed SIP may be inspected online starting Jan. 1, 2024 in the Delaware Register of Regulations, or in-person, by appointment only, by contacting Kelsey Pangman by phone at 302-323-4542 or by email at Kelsey.Pangman@delaware.gov.

The Department will accept public comment through Feb. 7, 2024. Comments will be accepted in written form via email to DNRECHearingComments@delaware.gov, using the online form at de.gov/dnreccomments, or by U.S. mail to the address on this page.

Transcript, Hearing Officer’s Report and Secretary’s Order

Public Hearing Transcript

Hearing Officer’s Report
– Appendix A: Proposed SIP revision (with attachment)

Secretary’s Order No: 2024-A-0011 — Approving Final Revision to Delaware’s State Implementation Plan: Second Limited Maintenance Plan Under the 2006 24-hour Fine Particulate Matter National Ambient Air Quality Standard
(Effective Date of the Amendment: March 12, 2024)

DNREC Exhibits

Exhibit 1: Environmental Protection Agency’s Final Rule. 2006 Particulate Matter Daily Standard

Exhibit 2: Environmental Protection Agency’s Final Rule. 2006 Particulate Matter Daily Standard, Implementation Rule

Exhibit 3: Register Notice for the proposed revision to Delaware’s State Implementation Plan “Proposed Delaware’s Second Limited Maintenance Plan Under the 2006 24-hour Fine Particulate Matter (PM2.5) National Ambient Air Quality Standard,” published in Delaware Register of Regulations on, January 1, 2024

Exhibit 4: Affidavit and legal notice in the December 17, 2023 Delaware State News

Exhibit 5: Affidavit and legal notice in the December 17, 2023 News Journal

Exhibit 6: Hearing notice on the State of Delaware Public Meeting Calendar, December 17, 2023

Exhibit 7: Legal notice as posted on the website for DNREC Public Notices, dated December 17, 2023

Exhibit 8: “Proposed Delaware’s Second Limited Maintenance Plan Under the 2006 24-hour Fine Particulate Matter (PM2.5) National Ambient Air Quality Standard”, proposed by the Department

Exhibit 9: Appendices to “Proposed Delaware’s Second Limited Maintenance Plan Under the 2006 24-hour Fine Particulate Matter (PM2.5) National Ambient Air Quality Standard”, proposed by the Department

Exhibit 10: DNREC Presentation