U.S. EPA Proposes SIP Calls for States with SSM Exemption Provisions
Posted: March 2023
On February 24, 2023, the United States Environmental Protection Agency (U.S. EPA) proposed to reinstate State Implementation Plan (SIP) Calls for three states and issue new SIP Calls for eight states and local jurisdictions. All of the proposed SIP Calls […]
Read MoreU.S. EPA has Finalized NOx Limits to Curb Ozone Transport from non-EGUs in 20 States
Posted: March 2023
On March 15, 2023, the U.S. Environmental Protection Agency (EPA) signed a final rule titled Federal “Good Neighbor Plan” for the 2015 Ozone National Ambient Air Quality Standards” (NAAQS). This final rule contains first-time requirements to limit emissions of nitrogen […]
Read More10 Steps to Preparing a Successful Air Construction Permit Application for New Equipment
Posted: February 2023
Are you planning on building a new greenfield facility that will have air emissions units or expanding your current facility with additional air emissions units? If so, there is a good chance that you will need to obtain an air […]
Read MoreNew Source Review (NSR) – What to Expect in 2023
Posted: January 2023
If you have not already noticed, NSR is a fairly common air quality topic in ALL4’s annual Look Ahead series of articles and in our 4 The Record blog posts, and with good reason. The NSR air permit program, consisting […]
Read MoreALL4’s Texas 2023 Look Ahead
Posted: January 2023
The new year is upon us, and ALL4 is looking forward to the changes and challenges it will bring. Whether the concerns are related to air, water, waste, or health and safety, we are here to assist and find solutions […]
Read MorePM2.5 Annual NAAQS Proposed to be Lowered
Posted: January 2023
After completing the White House Office of Management and Budget (OMB) review on December 27, 2022, the much anticipated proposal to lower the annual particulate matter of less than 2.5 microns (PM2.5) National Ambient Air Quality Standard (NAAQS) was officially […]
Read MoreOzone NAAQS Updates and the Expanded Good Neighbor Policy – What to Expect in 2023
Posted: January 2023
While U.S. EPA’s reconsideration of the particulate matter less than 2.5 microns (PM2.5) National Ambient Air Quality Standard (NAAQS) has been in the spotlight, there has been far less publicity on the current administration’s October 29, 2021 announcement that U.S. […]
Read More2023 Look Ahead
Posted: January 2023
Part 1 EHS&S Look Ahead // Colin McCall Greetings from ALL4 in 2023. I’d like to start the year once again by thanking our employees, clients, and partners for the support and for enjoying the journey with us. We never […]
Read MoreCommon Sampling System Issues that Lead to Errors in Analysis and How to Avoid Them
Posted: December 2022
What Issues May Come Up During Stack Testing? When stack testing, there are a lot of moving parts that go into the operation to ensure that the stack testing event goes smoothly. Because of this, there are several common issues […]
Read MoreBig Changes for California Annual Emissions Report Starting in 2023
Posted: December 2022
Recent changes to California’s Criteria Air Pollutants and Toxic Air Contaminants Reporting (CTR) requirements, which were designed to establish a uniform system for reporting annual emissions data and collect more data from stationary sources, are set to start phasing in […]
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