The Court reversed the Fourth Circuit's grant of summary judgment in favor of a coal-fired power plant operator charged with violating the Clean Air Act's (CAA's) prevention of significant deterioration (PSD) regulations. The CAA's PSD and new source performance standards (NSPS) provisions both cove...

The Ninth Circuit affirmed a lower court decision that the Clean Air Act (CAA) does not preempt certain provisions of local "fleet rules" requiring operators to meet specified emission standards or engine requirements, but reversed and remanded the court's refusal to consider whether the CAA preempt...

The Ninth Circuit upheld an injunction enjoining the California Air Resources Board from enforcing state regulations that limit emissions from the auxiliary diesel engines of ocean-going vessels within 24 miles of California's coast. Clean Air Act (CAA) §209(e)(2)(A) requires California to obta...

The Ninth Circuit held that federal law preempts Washington State's Cleanup Priority Act, a statute enacted through the passage of a voter initiative. The Act was intended to "prevent the addition of new radioactive and hazardous waste" at the Hanford Nuclear Reservation site until cleanup of existi...

A district court held that the applicable legal test for the "routine maintenance, repair, and replacement" exclusions found in the Clean Air Act (CAA) should be applied to activities that are considered "routine in the industry" rather than "routine at the unit." In a CAA enforcement action filed a...

The court holds that, as applied to industrial truck manufacturers and distributors, the Occupational Safety and Health Act (OSH Act) and the Occupational Safety and Health Administration's (OSHA's) hazard communication standard (HCS) preempt enforcement of the occupational warning requirements unde...

The Court holds that a landfill constructed on land ceded from the Yankton Sioux Reservation in South Dakota by an 1894 Act that diminished the boundaries of the reservation is not subject to federal environmental regulation. The Court first holds that the 1894 Act—a negotiated agreement providing...

The court holds that a Wisconsin farming family's state-law claims against a pesticide manufacturer are preempted by the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA). The family filed negligence and fraudulent representation claims based on the manufacturer's alleged off-label stateme...

The court holds that a U.S. Forest Service proposal for a logging project and road extension in the Green Mountain National Forest in Vermont violated the National Environmental Policy Act (NEPA), but not the National Forest Management Act (NFMA). The court first holds that neither the district cour...

The court holds that oil pollution claims arising under the Oil Pollution Act of 1990 (OPA) are not subject to the Limitation of Shipowner's Liability Act of 1851 or to the concursus of claims under Rule F of the Supplemental Rules for Certain Admiralty and Maritime Claims of the Federal Rules of Ci...