ELR Citation: ELR 21157
No(s). 95-70352 (9th Cir. May 14, 1996)

The court holds that the U.S. Environmental Protection Agency's (EPA's) interpretation of the attainment demonstration for particulate matter less than 10 microns (PM10) in Arizona's 1995 state implementation plan (SIP) revision is not based on a permissible construction of the Clean Air Act (CAA), ...