Recent Revisions to U.S. EPA Reference Method 23
Posted: April 2023
The U.S. Environmental Protection Agency (EPA) has released a revised version of 40 CFR Part 60, Appendix A –Method 23. [88 Fed. Reg. 16732 (Mar. 20, 2023)]. Even the title changed: from “Determination of Polychlorinated Dibenzo-p-Dioxins and Polychlorinated Dibenzofurans from […]
Read MoreData Quality Part 1: What Do We Mean by Data Quality?
Posted: April 2023
When making a measurement, we are looking to answer a question. We want and need our measurement to be robust at the levels that address the underlying question. That concept seems simple and obvious, but it gets into the weeds […]
Read MoreFuel Flow Monitoring Systems Part 2: Potential Challenges and Best Practices
Posted: April 2023
In Part 1, we looked at a few common types of fuel meters, how they measure flow, how they can be applied, and how they can impact a facility’s operations. Data from fuel flow meters are fed into regulatory reports, […]
Read MoreU.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. […]
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