The court holds unripe for review the Interior Board of Land Appeals' (IBLA's) ruling that the Office of Surface Mining Reclamation and Enforcement (OSM) lacks jurisdiction to order a mining company to reduce acid mine drainage seeping from a mining operation in West Virginia. The IBLA ruled that th...

The court denied a petition to review the U.S. Environmental Protection Agency's (EPA's) approval of a revision to Missouri's state implementation plan (SIP) that replaced four area-specific fugitive dust regulations with one, consistent statewide rule. The court first holds that the state environme...

The court holds that an electric utility lacks standing to petition for review a U.S. Environmental Protection Agency (EPA) final rule approving a revision to the new source review program of Pennsylvania's Clean Air Act (CAA) state implementation plan (SIP). The state's new source review program is...

The court holds unlawful U.S. Environmental Protection Agency (EPA) regulations that allow both local approval and federal funding of transportation projects that fail to satisfy the Clean Air Act's (CAA's) state implementation plan (SIP) conformity requirements. The court first holds that the EPA r...

The court upholds a U.S. Environmental Protection Agency (EPA) rule that allows the Agency to issue variances from general Resource Conservation and Recovery Act (RCRA) treatment standards if such standards would likely discourage aggressive remediation of previously disposed of hazardous waste. The...

The court holds that a metal mining operator's claims against the U.S Environmental Protection Agency (EPA) for allegedly revising the Emergency Planning and Community Right-to-Know Act's (EPCRA's) toxic release inventory program as it applies to the mining industry without formal rulemaking are rip...

The court holds that a U.S. Environmental Protection Agency (EPA) rule establishing a bifurcated schedule for hazardous waste combustors to comply with strict new emission standards is arbitrary and capricious. The rule, promulgated under the Clean Air Act (CAA) and the Resource Conservation and Rec...

The court affirms a district court denial of summary judgment to a building industry association challenging the U.S. Fish and Wildlife Service's (FWS') listing of four species of fairy shrimp that live in vernal pools in California as endangered or threatened under the Endangered Species Act (ESA)....

The court remands the U.S. Environmental Protection Agency's (EPA's) hazardous air pollutant emission standards for hazardous waste combustors to the Agency because the standards fail to reflect the emissions achieved in practice by the best performing sources as required by the Clean Air Act (CAA)....

The court vacates the Environmental Protection Agency's (EPA's) approval of a county's Clean Air Act (CAA) new source review (NSR) program because EPA did not adequately assess whether the revised program would meet current attainment requirements. Before EPA approved the county's revised NSR progra...