4 The Record is a publication from ALL4’s team that takes an in-depth look at technical and regulatory topics.
ALL4 at the 2025 NCASI Annual Conference
Posted: October 2nd, 2025
Nine of us from ALL4 attended the 2025 NCASI Annual Conference this week in Atlanta, GA. NCASI is a technical association that serves the forest products industry by providing scientific research and technical information necessary to achieve the industry’s environmental […]
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Recent New Source Review Guidance Updates
Posted: October 2nd, 2025
In September 2025, the U.S. Environmental Protection Agency (U.S. EPA) issued three new guidance memoranda on New Source Review (NSR) topics: begin actual construction, projected actual emissions, and reactivation. The three memos are posted on U.S. EPA’s NSR policy and […]
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SCAQMD Rule 1157 – Particulate Standards for Aggregate and Related Operations
Posted: September 25th, 2025
South Coast Air Quality Management District (SCAQMD) of California adopted Rule 1157 in 2005 and amended it in 2008, with the purpose of reducing PM10 emissions from aggregate and related operations. The rule defines “aggregate operations” as operations that produce […]
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U.S. EPA’s Proposed Reconsideration of the GHGRP
Posted: September 25th, 2025
On September 16, 2025 the United States Environmental Protection Agency (U.S. EPA) published a proposed rule to Reconsider the Greenhouse Gas (GHG) Reporting Program (GHGRP) under Docket No. EPA-HQ-OAR-2025-0186. The proposed rule will remove most of the reporting requirements for […]
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How To Develop A Regulatory Compliant QA/QC Program For Your CMS – Part 2
Posted: September 25th, 2025
In Part 1 of this 4 The Record article series, the terminology for Quality Assurance (QA) and Quality Control (QC) was defined and discussed. QA activities, such as cylinder gas audits (CGAs) and relative accuracy test audits (RATAs), ensure quality […]
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Air Quality Permitting Data Centers in Pennsylvania
Posted: September 18th, 2025
The construction and air permitting of data centers continues to be a growing industry worldwide. Each country and state has their own set of requirements for the construction and permitting process. Currently, Pennsylvania is a hotbed for data center growth […]
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U.S. EPA Extends Compliance Deadlines for Oil and Natural Gas Sector
Posted: September 18th, 2025
On July 31, 2025, the United States Environmental Protection Agency (U.S. EPA) issued an interim final rule to extend compliance deadlines established for crude oil and natural gas facilities that are subject to the provisions of […]
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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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