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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Recap of the CAPCA 2026 Spring Technical Workshop and Forum

Posted: April 30th, 2026

Author: Emily Mandel This year’s Spring Carolinas Air Pollution Control Association (CAPCA) technical workshop and forum included a wide-range of technical topics of interest to those located in the Carolinas and beyond. In addition to regulatory update highlights presented by […]

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Ventilation And Indoor Air Quality

Posted: April 23rd, 2026

Author: Staci McGill The Occupational Health and Safety Administration (OSHA) identifies Indoor Air Quality (IAQ) as an important consideration for workplace health and safety as well as worker comfort. In all workplaces, instances of poor IAQ can lead to symptoms […]

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TCEQ Amends Public Notice Requirements in 30 TAC Chapters 39 and 55

Posted: April 23rd, 2026

Author: Maddy Vanlandingham Effective February 19, 2026, the Texas Commission on Environmental Quality (TCEQ) adopted proposed amendments to Texas Administrative Code Title 30, Chapter 39 (Public Notice) and Chapter 55 (Requests for Reconsideration and Contested Case Hearings; Public Comment). These […]

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Final Updates to the Chemical Manufacturing Area Source Rule

Posted: April 16th, 2026

Author: Philip Crawford On April 1, 2026, the U.S. Environmental Protection Agency (U.S. EPA) finalized changes to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Chemical Manufacturing Area Sources (i.e., CMAS, codified at 40 CFR Part 63, Subpart […]

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Understanding the Final PEPO NESHAP: Key Changes and Implications

Posted: April 7th, 2026

Author: Andrew Kelley & Dayana Flores Granda The U.S. Environmental Protection Agency (U.S. EPA) has finalized updates to the Polyether Polyols (PEPO) Production National Emission Standards for Hazardous Air Pollutants (NESHAP), 40 CFR Part 63, Subpart PPP. PEPO are chemical […]

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Do Your Incident Investigations Measure Up?

Posted: April 7th, 2026

Author: Bruce Armbruster Workplace safety incident investigations of both near misses and serious injuries and fatalities (SIFs) are critical steps in identifying appropriate and effective corrective and preventive actions. High-caliber incident investigations prevent future harm to employees, yet organizations often […]

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