ADMINISTRATIVE CODE

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  3. TITLE 35: ENVIRONMENTAL PROTECTION
  4. PART 204 PREVENTION OF SIGNIFICANT DETERIORATION
TITLE 35: ENVIRONMENTAL PROTECTION
SUBTITLE B: AIR POLLUTION
CHAPTER I: POLLUTION CONTROL BOARD
SUBCHAPTER a: PERMITS AND GENERAL PROVISIONS
PART 204 PREVENTION OF SIGNIFICANT DETERIORATION
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SUBPART A: GENERAL PROVISIONS

Section 204.100 Incorporations by Reference
Section 204.110 Abbreviations and Acronyms
Section 204.120 Severability

SUBPART B: DEFINITIONS

Section 204.200 Definitions
Section 204.210 Actual Emissions
Section 204.220 Adverse Impact on Visibility
Section 204.230 Allowable Emissions
Section 204.240 Baseline Actual Emissions
Section 204.250 Baseline Area
Section 204.260 Baseline Concentration
Section 204.270 Begin Actual Construction
Section 204.280 Best Available Control Technology (BACT)
Section 204.290 Building, Structure, Facility, or Installation
Section 204.300 Clean Coal Technology
Section 204.310 Clean Coal Technology Demonstration Project
Section 204.320 Commence
Section 204.330 Complete
Section 204.340 Construction
Section 204.350 Dispersion Technique
Section 204.360 Electric Utility Steam Generating Unit
Section 204.370 Emissions Unit
Section 204.380 Excessive Concentration
Section 204.390 Federal Land Manager
Section 204.400 Federally Enforceable
Section 204.410 Fugitive Emissions
Section 204.420 Good Engineering Practice
Section 204.430 Greenhouse Gases (GHGs)
Section 204.440 High Terrain
Section 204.450 Indian Reservation
Section 204.460 Indian Governing Body
Section 204.470 Innovative Control Technology
Section 204.480 Low Terrain
Section 204.490 Major Modification
Section 204.500 Major Source Baseline Date
Section 204.510 Major Stationary Source
Section 204.520 Minor Source Baseline Date
Section 204.530 Nearby
Section 204.540 Necessary Preconstruction Approvals or Permits
Section 204.550 Net Emissions Increase
Section 204.560 Potential to Emit
Section 204.570 Prevention of Significant Deterioration (PSD) Permit
Section 204.580 Process Unit
Section 204.590 Project
Section 204.600 Projected Actual Emissions
Section 204.610 Regulated NSR Pollutant
Section 204.620 Replacement Unit
Section 204.630 Repowering
Section 204.640 Reviewing Authority
Section 204.650 Secondary Emissions
Section 204.660 Significant
Section 204.670 Significant Emissions Increase
Section 204.680 Stack in Existence
Section 204.690 Stationary Source
Section 204.700 Subject to Regulation
Section 204.710 Temporary Clean Coal Technology Demonstration Project

SUBPART C: MAJOR STATIONARY SOURCES IN ATTAINMENT AND UNCLASSIFIABLE AREAS

Section 204.800 Applicability
Section 204.810 Source Information
Section 204.820 Source Obligation
Section 204.830 Permit Expiration
Section 204.840 Effect of Permits
Section 204.850 Relaxation of a Source-Specific Limitation
Section 204.860 Exemptions

SUBPART D: INCREMENT

Section 204.900 Ambient Air Increments
Section 204.910 Ambient Air Ceilings
Section 204.920 Restrictions on Area Classifications
Section 204.930 Redesignation

SUBPART E: STACK HEIGHTS

Section 204.1000 Stack Heights

SUBPART F: REQUIREMENTS FOR MAJOR STATIONARY SOURCES AND MAJOR MODIFICATIONS IN ATTAINMENT AND UNCLASSIFIABLE AREAS

Section 204.1100 Control Technology Review
Section 204.1110 Source Impact Analysis
Section 204.1120 Air Quality Models
Section 204.1130 Air Quality Analysis
Section 204.1140 Additional Impact Analyses

SUBPART G: ADDITIONAL REQUIREMENTS FOR CLASS I AREAS

Section 204.1200 Additional Requirements for Sources Impacting Federal Class I Areas

SUBPART H: GENERAL OBLIGATIONS OF THE ILLINOIS ENVIRONMENTAL PROTECTION AGENCY

Section 204.1300 Notification of Application Completeness to Applicants
Section 204.1310 Transmittal of Application to USEPA
Section 204.1320 Public Participation
Section 204.1330 Issuance Within One Year of Submittal of Complete Application
Section 204.1340 Permit Rescission

SUBPART I: NONAPPLICABILITY RECORDKEEPING AND REPORTING

Section 204.1400 Recordkeeping and Reporting Requirements for Certain Projects at Major Stationary Sources

SUBPART J: INNOVATIVE CONTROL TECHNOLOGY

Section 204.1500 Innovative Control Technology

SUBPART K: PLANTWIDE APPLICABILITY LIMITATION

Section 204.1600 Applicability
Section 204.1610 Definitions
Section 204.1620 Actuals PAL
Section 204.1630 Allowable Emissions
Section 204.1640 Continuous Emissions Monitoring System (CEMS)
Section 204.1650 Continuous Emissions Rate Monitoring System (CERMS)
Section 204.1660 Continuous Parameter Monitoring System (CPMS)
Section 204.1670 Lowest Achievable Emission Rate (LAER)
Section 204.1680 Major Emissions Unit
Section 204.1690 Plantwide Applicability Limitation (PAL)
Section 204.1700 PAL Effective Date
Section 204.1710 PAL Effective Period
Section 204.1720 PAL Major Modification
Section 204.1730 PAL Permit
Section 204.1740 PAL Pollutant
Section 204.1750 Predictive Emissions Monitoring System (PEMS)
Section 204.1760 Reasonably Achievable Control Technology (RACT)
Section 204.1770 Significant Emissions Unit
Section 204.1780 Small Emissions Unit
Section 204.1790 Permit Application Requirements
Section 204.1800 General Requirements for Establishing PAL
Section 204.1810 Public Participation Requirements
Section 204.1820 Setting the 10-Year Actuals PAL Level
Section 204.1830 Contents of the PAL Permit
Section 204.1840 Effective Period and Reopening a PAL Permit
Section 204.1850 Expiration of a PAL
Section 204.1860 Renewal of a PAL
Section 204.1870 Increasing the PAL During the PAL Effective Period
Section 204.1880 Monitoring Requirements
Section 204.1890 Recordkeeping Requirements
Section 204.1900 Reporting and Notification Requirements
Section 204.1910 Transition Requirements
AUTHORITY: Implementing Sections 9.1 and 10 and authorized by Sections 27 and 28 of the Environmental Protection Act [415 ILCS 5/9.1, 10, 27 and 28].
SOURCE: Adopted in R19-1 at 44 Ill. Reg. 14923, effective September 4, 2020; amended in R22-17 at 49 Ill. Reg. 6332, effective April 23, 2025.