ELR Citation: ELR 20955
No(s). 86-1305 (D.C. Cir. May 3, 1988)

The court holds that petitioner's challenge to the Environmental Protection Agency's (EPA's) "block average" method of determining compliance with the Clean Air Act's national ambient air quality standards for sulfur dioxide is not ripe for review. In PPG Industries, Inc. v. Costle, 11 ELR 20858, th...