4 The record articles

4 The Record is a publication from ALL4’s team that takes an in-depth look at technical and regulatory topics.

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What You Should Know About CMAS Applicability Testing

Posted: August 21st, 2025

If you are a chemical manufacturer and have been keeping a pulse on the federal air quality rules, you may have heard about the CMAS rule. What is CMAS? It is the National Emission Standards for Hazardous Air Pollutants (NESHAP) […]

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NESHAP Extensions: A Look at Two Recent Relief Notifications

Posted: August 7th, 2025

Over the last few weeks, the United States Environmental Protection Agency (U.S. EPA) and the White House took actions related to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Coke Oven Facilities and the Hazardous Organic NESHAP, also […]

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