Sierra Club v. Environmental Protection Agency

ELR Citation: 50 ELR 20081
No(s). 18-1167 (D.C. Cir. Apr 7, 2020)

The D.C. Circuit dismissed a petition to review EPA's Guidance on Significant Impact Levels (SILs) for Ozone and Fine Particles in the Prevention of Significant Deterioration Permitting Program, which sets numerical SILs that can be used by companies applying for PSD permits. An environmental group ...