The court remanded portions of a 2002 U.S. Environmental Protection Agency (EPA) rule interpreting when a major stationary source undertakes a "modification," thereby triggering the Clean Air Act's new source review (NSR) requirements. EPA erred in promulgating the clean unit applicability test, whi...

The court affirms a district court's grant of summary judgment to the Tennessee Valley Authority (TVA) on environmental groups' request for civil penalties and on its claim as to violations of the Clean Air Act's (CAA's) 20% opacity limitation occurring before May 20, 1999, but it reversed summary j...

The court reverses the dismissal of an individual's complaint against his employer under the Clean Air Act's (CAA's) whistleblower provision. The U.S. Department of Labor's Administrative Review Board (ARB) dismissed the complaint reasoning that the individual did not engage in a protected activity ...

A court partially grants the U.S. motion to collaterally estop defendants from denying their liability as owners and operators of the Armour Road Superfund site in North Kansas City, Missouri. Except for one of the defendants, prior actions against the defendants were final, or sufficiently final, t...

A court dismisses an individual's claim for $2.5 million in compensatory and punitive damages against a potentially responsible party (PRP) of the Omaha, Nebraska, Superfund site. The individual lived on the site from the date of his birth until his 18th birthday. He claims that he was exposed to le...

The court upholds a lower court decision that the United States has no obligation to reimburse a Florida county for the costs it incurred treating soil and groundwater contamination at the Miami International Air Depot. From 1943 to 1966, the U.S. government maintained and repaired U.S. Air Force ai...

The court holds that petitioners lack standing to challenge a Nuclear Regulatory Commission (NRC) rule that revised regulations governing the exemption standards for the transportation of radioactive material. The petitioners argue that the NRC violated the National Environmental Policy Act in prepa...

The court denies Nevada's petition for review of the U.S. Department of Energy's (DOE's) final environmental impact statement (EIS) for a nuclear waste underground repository and a portion of its record of decision governing the transportation of nuclear waste from production sources to Yucca Mounta...

The court upheld a lower court decision dismissing an environmental service company's patent infringement suit against a hazardous waste remediation contractor. The contractor was hired by the U.S. Army Corps of Engineers to clean up a lead-contaminated parcel of land near Colonie, New York. The com...

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...