Ill. Admin. Code tit. 35, § 255.150
| 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 |