Documents Designations for 24-Hour PM2.5 NAAQS: Overview and Guidance Amy Vasu PM2.5 Workshop June 20-21,...

Designations for 24-Hour PM2.5 NAAQS: Overview and Guidance Amy Vasu PM2.5 Workshop June 20-21, 2007 24-Hour PM2.5 Designation Requirements PM2.5 NAAQS was revised for the…