CAA

Clean Air Act

CERCLA

Comprehensive Environmental Response, Compensation and Liability Act

EA

environmental assessment

EIS

environmental impact statement

FONSI

finding of no significant impact

IEPA

Illinois Environmental Protection Agency

km

kilometer

MPO

metropolitan planning organization

mi

mile

NAA

nonattainment area

NAAQS

National Ambient Air Quality Standard

NEPA

National Environmental Policy Act

NSR

New Source Review

PSD

Prevention Significant Deterioration

SIP

state implementation plan

USEPA

United States Environmental Protection Agency