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Two challenges filed from opposite directions against the EPA’s 2015 primary or health-based National Ambient Air Quality Standards (NAAQS) for Ozone were denied by a panel of the U.S. Court of Appeals for the D.C. Circuit. At one end, environmental and health advocacy groups argued that the standard was insufficiently protective of children. At the […]
In a majority opinion, the U.S. Court of Appeals for the D.C. Circuit dismissed a petition from the state of California and environmental groups to have the court review the legality of a memo William L. Wehrum, the assistant administrator for the EPA’s Office of Air and Radiation, issued to all Regional Air Division directors.
The EPA’s Office of Air Quality Planning and Standards recently issued guidance on how information on prescribed fires on wildland may be factored into exceptional events demonstrations required by Section 319(b) of the Clean Air Act (CAA). If the Agency accepts a state’s exceptional event demonstration, air pollution resulting from the event is excluded from […]
Based on its Clean Air Act (CAA) Section 112 Residual Risk and Technology Review (RTR), the EPA is proposing amendments to its 2003 National Emission Standards for Hazardous Air Pollutants (NESHAP) for the Municipal Solid Waste (MSW) Landfill source category.
The EPA’s proposed 2020 Renewable Volume Obligations (RVOs) for petroleum refiners, which are required under the Clean Air Act’s Renewable Fuel Standard (RFS), were greeted with almost universal disapproval from the ethanol industry and the farmers who grow crops that are converted into ethanol.
A panel of the U.S. Court of Appeals for the D.C. Circuit rejected challenges the Sierra Club mounted against procedures the EPA uses to approve plans states develop to monitor compliance with the National Ambient Air Quality Standards (NAAQS).
Under a new EPA proposal, a major source of hazardous air pollutants (HAPs) could be reclassified as an area source at any time by limiting its potential to emit (PTE) HAPs to below the major source thresholds of 10 tons per year (tpy) of any single HAP or 25 tpy of any combination of HAPs. […]
The EPA’s broad discretion under the Clean Air Act (CAA) to select the measures to achieve and maintain air quality was affirmed by a panel of the U.S. Court of Appeals for the D.C. Circuit in a ruling addressing cross-state air pollution.
The EPA’s Clean Air Act Stationary Source Compliance Monitoring Strategy (CMS) describes the Agency’s approach for EPA regional offices, states, Indian tribes, and localities to assess and document compliance with permits and regulations at major stationary and synthetic minor sources.
In a letter to EPA Administrator Andrew Wheeler, a bipartisan group of six senators added their voice to those urging the Agency to leave in place its Mercury and Air Toxics Standards (MATS).