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  3. TITLE 35: ENVIRONMENTAL PROTECTION
  4. PART 845 STANDARDS FOR THE DISPOSAL OF COAL COMBUSTION RESIDUALS IN SURFACE IMPOUNDMENTS
TITLE 35: ENVIRONMENTAL PROTECTION
SUBTITLE G: WASTE DISPOSAL
CHAPTER I: POLLUTION CONTROL BOARD
SUBCHAPTER j: COAL COMBUSTION WASTE SURFACE IMPOUNDMENTS
PART 845 STANDARDS FOR THE DISPOSAL OF COAL COMBUSTION RESIDUALS IN SURFACE IMPOUNDMENTS
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SUBPART A: GENERAL PROVISIONS

Section 845.100 Scope and Purpose
Section 845.110 Applicability of Other Regulations
Section 845.120 Definitions
Section 845.130 Surface Impoundment Identification
Section 845.140 Right of Inspection
Section 845.150 Incorporations by Reference
Section 845.160 Severability
Section 845.170 Inactive Closed CCR Surface Impoundments

SUBPART B: PERMITTING

Section 845.200 Permit Requirements and Standards of Issuance
Section 845.210 General Provisions
Section 845.220 Construction Permits
Section 845.230 Operating Permits
Section 845.240 Pre-Application Public Notification and Public Meeting
Section 845.250 Tentative Determination and Draft Permit
Section 845.260 Draft Permit Public Notice and Participation
Section 845.270 Final Permit Determination and Appeal
Section 845.280 Transfer, Modification and Renewal
Section 845.290 Construction Quality Assurance Program

SUBPART C: LOCATION RESTRICTIONS

Section 845.300 Placement Above the Uppermost Aquifer
Section 845.310 Wetlands
Section 845.320 Fault Areas
Section 845.330 Seismic Impact Zones
Section 845.340 Unstable Areas and Floodplains
Section 845.350 Failure to Meet Location Standards

SUBPART D: DESIGN CRITERIA

Section 845.400 Liner Design Criteria for Existing CCR Surface Impoundments
Section 845.410 Liner Design Criteria for New CCR Surface Impoundments and Any Lateral Expansion of a CCR Surface Impoundment
Section 845.420 Leachate Collection and Removal System
Section 845.430 Slope Maintenance
Section 845.440 Hazard Potential Classification Assessment
Section 845.450 Structural Stability Assessment
Section 845.460 Safety Factor Assessment

SUBPART E: OPERATING CRITERIA

Section 845.500 Air Criteria
Section 845.510 Hydrologic and Hydraulic Capacity Requirements for CCR Surface Impoundments
Section 845.520 Emergency Action Plan
Section 845.530 Safety and Health Plan
Section 845.540 Inspection Requirements for CCR Surface Impoundments
Section 845.550 Annual Consolidated Report

SUBPART F: GROUNDWATER MONITORING AND CORRECTIVE ACTION

Section 845.600 Groundwater Protection Standards
Section 845.610 General Requirements
Section 845.620 Hydrogeologic Site Characterization
Section 845.630 Groundwater Monitoring Systems
Section 845.640 Groundwater Sampling and Analysis Requirements
Section 845.650 Groundwater Monitoring Program
Section 845.660 Assessment of Corrective Measures
Section 845.670 Corrective Action Plan
Section 845.680 Implementation of the Corrective Action Plan

SUBPART G: CLOSURE AND POST-CLOSURE CARE

Section 845.700 Required Closure or Retrofit of CCR Surface Impoundments
Section 845.710 Closure Alternatives
Section 845.720 Closure Plan
Section 845.730 Initiation of Closure
Section 845.740 Closure by Removal
Section 845.750 Closure with a Final Cover System
Section 845.760 Completion of Closure Activities
Section 845.770 Retrofitting
Section 845.780 Post-Closure Care Requirements

SUBPART H: RECORDKEEPING

Section 845.800 Facility Operating Record
Section 845.810 Publicly Accessible Internet Site Requirements

SUBPART I: FINANCIAL ASSURANCE

Section 845.900 General Provisions
Section 845.910 Upgrading Financial Assurance
Section 845.920 Release of Financial Institution and Owner or Operator
Section 845.930 Cost Estimates
Section 845.940 Revision of Cost Estimates
Section 845.950 Mechanisms for Financial Assurance
Section 845.960 Trust Fund
Section 845.970 Surety Bond Guaranteeing Payment
Section 845.980 Surety Bond Guaranteeing Performance
Section 845.990 Letter of Credit
AUTHORITY: Implementing Sections 12, 22, and 22.59 of the Environmental Protection Act [415 ILCS 5/12, 22, and 22.59] and authorized by Sections 22.59, 27, and 28 of the Environmental Protection Act [415 ILCS 5/22.59, 27, and 28].
SOURCE: Adopted in R20-19 at 45 Ill. Reg. 5884, effective April 21, 2021; amended in R20-19A at 49 Ill. Reg. 8977, effective June 26, 2025; amended in R20-19B at 49 Ill. Reg. 13000, effective October 2, 2025.