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Prevention of significant deterioration (PSD)

Nucor Steel-Arkansas v. Big River Steel, LLC

The Eighth Circuit affirmed a lower court decision dismissing a steel company's CAA citizen lawsuit seeking injunctive relief to stop a competitor from constructing or continuing to construct a steel mill. Arkansas's environmental...

Sierra Club v. Oklahoma Gas & Electric Co.

The Tenth Circuit dismissed an environmental group's citizen suit against an Oklahoma power company for CAA violations at a power plant. The group claimed the company modified a coal-fired boiler without first obtaining an emission-...

Sierra Club de Puerto Rico v. Environmental Protection Agency

The D.C. Circuit dismissed environmental groups' lawsuit seeking to vacate an EPA rule that implements the CAA's new source review (NSR) permitting scheme in nonattainment areas. The groups filed suit after EPA issued an energy company...

Northwest Environmental Defense Center v. Cascade Kelly Holdings LLC

A district court dismissed environmental groups' CAA citizen suit against a crude oil transloading facility for constructing and operating the facility without a prevention of significant deterioration (PSD) permit. The groups allege...

National Parks Conservation Ass'n v. U.S. Environmental Protection Agency

The Ninth Circuit granted in part and denied in part petitions for review challenging EPA's federal implementation plan to reduce regional haze at two power plants in Montana. The owner and operator of the plants, as well as...

United States v. Oklahoma Gas & Electric Co.

A district court dismissed EPA's lawsuit against an Oklahoma utility under the CAA alleging that it failed to properly project whether modifications made to two coal-fired power plants would result in an increase in emissions. The...

WildEarth Guardians v. McCarthy

The Ninth Circuit upheld a lower court decision dismissing an environmental group's citizen suit requesting EPA to issue more stringent regulations for ozone pollution under the PSD program. The group alleged that the EPA Administrator...

WildEarth Guardians v. United States Environmental Protection Agency

The Tenth Circuit denied petitions for review challenging EPA's approval of a regional cap-and-trade program regulating sulfur dioxide (SO2) emissions to address regional haze over the Colorado Plateau, a Class I area. Under the CAA's...

Clean Water Action Council of Northeastern Wisconsin, Inc. v. United States Environmental Protection Agency

The Seventh Circuit dismissed an environmental group's lawsuit challenging EPA's decision not to object to Wisconsin's renewal of a Title V permit for a pre-1975 paper mill. Under the CAA's PSD program, emissions from pre-1975 sources...

Sierra Club v. U.S. Environmental Protection Agency

The Ninth Circuit vacated and remanded EPA's decision to issue a PSD permit allowing a power company to build and operate a 600 megawatt natural gas-fired power plant. EPA missed the one-year statutory deadline to grant or deny the...

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