What’s in the Proposed 2025 Ambient Air Monitoring Network Plan for Kentucky?
Posted: June 4th, 2025
Each year, the Kentucky Energy and Environment Cabinet releases its annual plan detailing how ambient air quality will be monitored across the Commonwealth. The Proposed 2025 Ambient Air Monitoring Network Plan is now available for public review and comment until […]
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SCAQMD – Nitric Acid Tanks Rule
Posted: May 15th, 2025
South Coast Air Quality Management (SCAQMD or District) Governing Board adopted Rule 1159.1 for the control of nitrogen oxides (NOX) emissions from nitric acid units. Rule 1159.1 is expected to impact over 900 nitric acid units across nearly 250 facilities. […]
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Air Toxics Regulatory Update
Posted: April 23rd, 2025
During the previous administration, we saw a flurry of revisions to air toxics regulations under 40 CFR Part 63. The United States Environmental Protection Agency (U.S. EPA) revised several National Emission Standards for Hazardous Air Pollutants (NESHAP) to include standards […]
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Gasoline Distribution Terminal Regulation Changes – Do You Need to Install a TOC CEMS or Update Your TOC Monitoring Strategy?
Posted: March 26th, 2025
As mentioned in a previous ALL4 article, the United States Environmental Protection Agency (U.S. EPA) finalized updates on May 8, 2024 to the Gasoline Distribution Terminal Regulations. The Gasoline Distribution Terminal Regulations include 40 CFR Part 63, Subpart R (National […]
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U.S. EPA Clarifies “Modification” as it Relates to NSPS Subpart XXa
Posted: March 6th, 2025
The United States Environmental Protection Agency (U.S. EPA) has clarified what constitutes a “modification” in response to questions received regarding the Standards of Performance for Bulk Gasoline Terminals that Commenced Construction, Modification, or Reconstruction After June 10, 2022 under 40 […]
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How do I Know if My Project Needs an Air Permit?
Posted: February 27th, 2025
There is not a whole lot that is black and white about air quality permitting. It can sometimes be hard to determine whether you need to submit an air permit application for a project and if so, what kind. The […]
Read articleProposed Amendments to Rules for the Cleveland 2015 Ozone Non-Attainment Areas
Posted: February 18th, 2025
Currently in Public Notice, the Ohio Environmental Protection Agency (Ohio EPA), Division of Air Pollution Control (DAPC) is working to amend three rules in the Ohio Administrative Code (OAC) due to the change of the Cleveland ozone nonattainment area from […]
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Proposed Revisions to North Carolina’s Permit Review Timeline Rule
Posted: February 14th, 2025
On February 4, 2025, the North Carolina Division of Air Quality (NC DAQ) hosted a public hearing to receive comments on the proposed Permit Review Timeline Rule revisions. NC DAQ has proposed revisions to their construction and operating permit rules […]
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Looking Ahead – Fenceline Monitoring
Posted: January 28th, 2025
In 2024, the U.S. Environmental Protection Agency (U.S. EPA) finalized new fenceline monitoring requirements associated with amendments to Standards of Performance for New Stationary Sources (NSPS) and National Emission Standards for Hazardous Air Pollutants (NESHAP) associated […]
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Looking Ahead – Air Toxics Regulatory Activity
Posted: January 21st, 2025
The last few years have seen a flurry of revisions to air toxics regulations, due primarily to a court case referred to as “LEAN” where the court determined that the U.S. Environmental Protection Agency (U.S. EPA) should have set more […]
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