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Posted: October 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 […]
Read articlePosted: September 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 […]
Read articlePosted: September 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 […]
Read articlePosted: September 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 […]
Read articlePosted: August 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 […]
Read articlePosted: August 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 […]
Read articlePosted: August 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 […]
Read articlePosted: July 2025
This article is a brief update on recent developments related to Congress’s disapproval of a few Biden administration air quality-related rules. The Congressional Review Act (CRA) was passed into law in 1996 to strengthen congressional oversight of federal agencies’ rules. […]
Read articlePosted: July 2025
On January 1, 2026 facilities with refrigeration appliances, including air conditioners, refrigerators, chillers, and freezers, with a full charge of 15 pounds or more of refrigerant may be subject to new leak repair requirements under 40 CFR Part 84, Subpart […]
Read articlePosted: June 2025
On June 11, 2025, the United States Environmental Protection Agency (U.S. EPA) proposed to repeal certain provisions of the 2024 amendments to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Coal- and Oil-Fired Electric Utility Steam Generating Units […]
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