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Development in Southeast Wisconsin Will Once Again be Hampered by Clean Air Rules

New U.S. Environmental Protection Agency (EPA) air quality standards and pollution migrating from upwind states will impact growth and development in southeastern Wisconsin, beginning on January 16, 2025....more

Breathe Easy: U.S. EPA Seeks to Significantly Tighten Fine Particulate Matter Standards

On January 6, 2023, the U.S. Environmental Protection Agency (EPA) issued a proposed rule to lower the primary National Ambient Air Quality Standard (NAAQS) for fine/inhalable particulate matter (PM2.5). These proposed...more

U.S. EPA Finalizes Step One of its “Clean Trucks Plan,” Tightening Emission Standards for Heavy-Duty Highway Engines and Vehicles...

On December 20, 2022, the U.S. Environmental Protection Agency (“EPA”) finalized new emission standards for heavy-duty highway vehicles and engines, including heavy-duty trucks and other vocational vehicles such as fire...more

Revival of the General Duty Clause

In a somewhat surprising decision issued at the end of 2020, U.S. EPA ruled that Section 112(r)(1) of the Clean Air Act, better known as the “General Duty Clause,” requires facilities to implement the latest industry...more

U.S. EPA Formalizes Reversal of “Once In/Always In” Emission Permitting Policy

U.S. EPA’s final rule reversing its 25 year old hazardous air pollutant “once in/always in” policy will soon be published in the Federal Register and will become effective 60 days thereafter. While first announced in a...more

Oilfield Operators Take Note: EPA is Poised to Relax Your Vapor Monitoring Deadlines and Streamline Your Bureaucratic Layers

Oilfield operators of every size have been busy implementing the Obama Administration’s labor-intensive requirements to detect and repair vapor leaks from well site equipment, often called the Quad Oa requirements, in...more

EPA Ends 20 Year “Once In, Always In” Policy for MACT Standards: May Effect Enforcement, New Permits

In a major change in air permitting policy, on January 25, 2018 U.S. EPA reversed its longstanding “once in, always in” policy governing what sources are subject to major source regulations for the emissions of air toxics...more

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