4 The Record is a publication from ALL4’s team that takes an in-depth look at technical and regulatory topics.
Who is SCAQMD and Why Industrial Facilities Should Care
Posted: September 11th, 2025
Every industrial facility in the Greater Los Angeles Area is touched by South Coast Air Quality Management District (SCAQMD or District) rules, and with dozens of regulations and permitting requirements, it can be difficult to see the full picture of […]
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U.S. EPA Proposes Revised Standards for Open Burning/Open Detonation of Waste Explosives
Posted: September 4th, 2025
On March 20, 2024, the U.S. Environmental Protection Agency (EPA) proposed amendments to the standards governing the open burning and open detonation (OB/OD) of waste explosives. While OB/OD of hazardous waste was initially prohibited in 1980, an exception was made […]
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Updates on the California Air Resources Board SB 253/261 Climate-Related Legislation
Posted: September 4th, 2025
On Thursday, August 21, 2025, the California Air Resources Board (CARB) hosted a public workshop on Senate Bills (SB) 253 and 261, also known by CARB as the 200’s. The workshop provided important clarification on California’s corporate climate disclosure laws, […]
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Highlights of the North Carolina Manufacturers Alliance 2025 Environmental, Energy, Health & Safety School
Posted: August 28th, 2025
The 2025 North Carolina Manufacturers Alliance’s (NCMA) Environmental, Energy, Health & Safety (EEHS) School, hosted in Raleigh, NC, provided timely and relevant EEHS presentations, panels, and discussions with leaders in industry, consulting, and government. Attendees of the school learned about […]
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What Are Scope 3 Greenhouse Gas Emissions?
Posted: August 28th, 2025
Greenhouse gas (GHG) emissions are becoming an increasing consideration for companies and organizations due to state regulations and business goals to address and mitigate emissions. The European Union (EU) is phasing in GHG reporting requirements for companies based in the […]
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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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South Coast AQMD Proposed Amended Rule 1107: Key Updates and What You Need to Know
Posted: August 21st, 2025
The South Coast Air Quality Management District (AQMD) is proposing to phase out the use of para-ChloroBenzotrifluoride (pCBtF) and tertiary-Butyl Acetate (t-BAc) in metal coating operations regulated under Rule 1107, with a final prohibition date of July 1, 2029. The […]
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U.S. EPA Proposes a Reconsideration of 2009 Endangerment Finding and Greenhouse Gas Vehicle Standards
Posted: August 14th, 2025
Introduction On July 29, 2025, the U.S. Environmental Protection Agency (U.S. EPA) proposed to rescind the 2009 Greenhouse Gas (GHG) Endangerment Finding, which has served as a foundation for regulating GHG emissions from motor vehicles for over a decade. With […]
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U.S. EPA Releases Significant Update to AP-42 Section 2.4 for Solid Waste Landfills
Posted: August 14th, 2025
In May 2025, the United States Environmental Protection Agency (U.S. EPA) released a significant update to AP-42 Section 2.4 for Municipal Solid Waste Landfills and the associated LandGEM model for estimating air emissions from solid waste landfills. AP-42 Section 2.4 […]
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Optimizing Air Emissions Calculations with Digital Solutions: Identifying Air Emissions Templates
Posted: August 7th, 2025
What is an Air Emissions “Template”? Templates are used to group similar emissions calculations within digital solution platforms. The way templates are handled varies depending on the software used, but templates are a common concept and approach across software systems. […]
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