The U.S. Court of Appeals for the District of Columbia Circuit denies petitioners' challenge to a U.S. Environmental Protection Agency (EPA) rule requiring drastic reductions in exhaust emissions from diesel trucks and buses beginning in 2007 and requiring the maximum sulfur content of diesel fuel t...

The court vacates the U.S. Environmental Protection Agency's (EPA's) approval of the revised ozone state implementation plans (SIPs) for the Washington, D.C., Metropolitan Area (Washington Metropolitan Area), made up of the District of Columbia, portions of Maryland, and portions of Virginia. The di...

The court holds that the Secretary of the Pennsylvania Department of Transportation and the Secretary of the Pennsylvania Department of Environmental Protection violated the Clean Air Act (CAA) by failing to implement state implementation plan (SIP)-required emission standards for the state's enhanc...

The court grants an environmental group's motion for partial summary judgment against Pennsylvania officials for failing to implement the state-enhanced vehicle inspection and maintenance (I/M) program in 16 counties by November 15, 1999, as required by the Pennsylvania state implementation plan (SI...

The court holds that under Ohio law, the doctrine of res judicata bars property owners' Resource Conservation and Recovery Act (RCRA) suit against the property's seller for leaving gasoline buried in the soil. The owners filed their RCRA suit in federal court after they litigated contract and fraud ...

The court upholds the U.S. Environmental Protection Agency's (EPA's) redesignation of five parcels of tribal land as a nonfederal Class I area under the Clean Air Act (CAA) prevention of significant deterioration (PSD) program. The court first holds that Arizona's chamber of commerce lacks standing ...

The court holds that trade associations' action for judicial review of a U.S. Environmental Protection Agency (EPA) rule permitting the use of "any credible evidence" to prove or disprove Clean Air Act (CAA) violations is not ripe for review. The heart of the associations' argument is that the credi...

The court upholds the U.S. Army Corps of Engineers' decisions to deny permits that would have allowed landowners to build camp structures on their property in the Atchafalaya floodway in Louisiana. The landowners purchased their property subject to a perpetual flowage, channel, and disposal easement...

The court holds that it lacks jurisdiction over a building association's appeal of a decision upholding the U.S. Fish and Wildlife Service's (FWS') listing of four species of fairy shrimp as endangered or threatened under the Endangered Species Act. The district court granted partial summary judgmen...

The court holds that environmental organizations have standing to assert an Endangered Species Act (ESA) §9 claim against a lumber company whose timber harvesting operations are allegedly causing the take of coho salmon. The court first holds that the organizations have satisfied each of the elemen...