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Sinclair Wyoming Refining Co. v. EPA

The Tenth Circuit rejected EPA's decision to deny an oil company's request for an exemption from the blending requirement under the Renewable Fuel Standards Program of the CAA. In 2005, Congress amended the CAA to require refiners and importers to blend biofuels into gasoline to cut down on greenhou...

Mexichem Fluor, Inc. v. EPA

The D.C. Circuit held that EPA overstepped its authority under the CAA when it banned the use of hydrofluorocarbons (HFCs) in products. In 2015, EPA issued a rule that restricted the manufacture of products containing HFCs. EPA based this decision on its authority to regulate "ozone depleting substa...

Farrell-Cooper Mining Co. v. DOI

The Tenth Circuit held that a coal mining company was entitled to judicial review of a DOI decision after a lower court dismissed the suit. In 2013, the company was cited by DOI for a violation of SMCRA. In 2015, the mining company filed a notice of appeal and a petition for stay pending appeal with...

Sierra Club v. EPA

The D.C. Circuit held that EPA must justify emissions limits set for certain hazardous air pollutants. The CAA requires EPA to set limits for seven different hazardous air pollutants (HAPs). In 2015, the Agency claimed to have identified sources of these pollutants and set emissions limits for them....