Illinois Administrative Code

Section 203.1400 Stationary Source "Stationary source" means any building, structure, facility, or installation which emits or may emit a regulated NSR pollutant. Emissions resulting directly from an internal combustion engine for transportation purposes or from a nonroad engine …

Section 203.1410 Applicability a) The requirements of this Part, other than Subpart R, shall apply to the construction of any new major stationary source (as defined in Section 203.1230) or major modification (as defined in Section 203.1220) that is major for the pollutant for wh…

Section 203.1420 Effect of Permits Approval to construct shall not relieve any owner or operator of the responsibility to comply fully with applicable provisions of the SIP and any other requirements under local, State, or federal law. (Source: Added at 49 Ill. Reg. 6237, effecti…

Section 203.1430 Relaxation of a Source-Specific Limitation At such time that a particular source or modification becomes a major stationary source or major modification solely by virtue of a relaxation in any enforceable limitation which was established after August 7, 1980, on …

Section 203.1440 Prohibitions a) A major stationary source or major modification shall not violate any condition contained in a construction permit issued for a new major stationary source or major modification which is subject to this Part. b) In any nonattainment area, no perso…

Section 203.145 Volatile Organic Material (Repealed) (Source: Repealed at 17 Ill. Reg. 16630, effective September 27, 1993)

Section 203.1450 Control of Ozone, PM10, and PM2.5 a) The provisions of this Part applicable to major stationary sources and major modifications of VOM shall apply to NOX emissions from major stationary sources and major modifications of NOX in any ozone nonattainment area, excep…

Section 203.1460 Permit Exemption Based on Fugitive Emissions The provisions of this Part shall not apply to a source or modification that would be a major stationary source or major modification only if fugitive emissions, to the extent quantifiable as evidenced by 35 Ill. Adm. …

Section 203.150 Public Participation Prior to the initial issuance or revision of a permit pursuant to Subpart B, the Agency shall provide, at a minimum, notice of the proposed issuance of a permit, a comment period, and opportunity for public hearing pursuant to the Agency publi…

Section 203.1500 Stack Heights a) The degree of emission limitation required for control of any regulated NSR pollutant under this Part shall not be affected in any manner by: 1) So much portion of the stack height of any source that exceeds good engineering practice, or 2) Any o…

Section 203.155 Severability (Repealed) (Source: Repealed at 12 Ill. Reg. 6118, effective March 22, 1988) SUBPART B: MAJOR STATIONARY SOURCES IN NONATTAINMENT AREAS

Section 203.1600 Construction Permit a) The Agency shall only issue a construction permit for a new major stationary source or a major modification that is subject to the requirements of this Part, other than this Subpart or Subpart R, if the Agency determines all applicable requ…

Section 203.1610 Public Participation a) Prior to the initial issuance or a modification of a permit issued pursuant to this Part, the Agency shall provide, at a minimum, a notice of the proposed issuance or modification of a permit, a comment period, and opportunity for public h…

Section 203.1700 Recordkeeping and Reporting Requirements for Certain Projects at Major Stationary Sources in Nonattainment Areas Except as otherwise provided in subsection (f), the provisions of this Section apply with respect to any regulated NSR pollutant emitted from projects…

Section 203.1800 Lowest Achievable Emission Rate a) The owner or operator of a new major stationary source shall demonstrate that the control equipment and process measures applied to the source will produce LAER for each regulated NSR pollutant for which the stationary source is…

Section 203.1810 Emissions Offsets a) The general requirements for emissions offsets are: 1) The owner or operator of a new major stationary source or major modification shall provide emissions offsets equal to or greater than the allowable emissions from the source or the increa…

Section 203.1820 Compliance by Existing Sources The owner or operator shall demonstrate that all major stationary sources which he or she owns or operates (or which are owned or operated by any entity controlling or controlled by, or under common control, with the owner or operat…

Section 203.1830 Analysis of Alternatives The owner or operator shall demonstrate that benefits of the new major source or major modification significantly outweigh the environmental and social costs imposed as a result of its location, construction, or modification, based upon a…

Section 203.1900 General Maintenance of Emission Offsets No person shall cease to maintain emission offsets which were provided for a source or modification which is subject to this Part. (Source: Added at 49 Ill. Reg. 6237, effective April 23, 2025) SUBPART P: OFFSETS FOR EMISSI…

Section 203.2000 Offsetting by Alternative or Innovative Means A source may offset, by alternative or innovative means, emission increases from rocket engine and motor firing, and cleaning related to such firing, at an existing or modified major source that tests rocket engines o…

Section 203.201 Prohibition In any nonattainment area, no person shall cause or allow the construction of a new major stationary source or major modification that is major for the pollutant for which the area is designated a nonattainment area, except as in compliance with this P…

Section 203.202 Coordination with Permit Requirement and Application Pursuant to 35 Ill. Adm. Code 201 For new major sources and major modifications, the fulfillment of the requirements of 35 Ill. Adm. Code 201 related to construction, including the permit requirements of 35 Ill.…

Section 203.203 Construction Permit Requirement and Application a) A construction permit is required prior to actual construction of a major new source or major modification. b) Applications for construction permits required under this Section shall contain sufficient information…

Section 203.204 Duration of Construction Permit (Repealed) (Source: Repealed at 12 Ill. Reg. 6118, effective March 22, 1988)

Section 203.205 Effect of Permits The issuance of a permit for a source subject to the requirements of this Part shall not relieve any person of the responsibility to comply fully with applicable provisions of the Environmental Protection Act (Act) (Ill. Rev. Stat. 1985, ch. 111 …

Section 203.206 Major Stationary Source a) For purposes of this Part, the term "major stationary source" shall exclusively mean "building, structure and facility," as those terms are defined in Section 203.113 of this Part. b) The following constitute a major stationary source: 1…

Section 203.207 Major Modification of a Source a) Except as provided in subsection (c), (d), (e) or (f), a physical change, or change in the method of operation of a major stationary source that would result in a significant net emissions increase of any pollutant for which the a…

Section 203.208 Net Emission Determination A net emissions increase is the amount by which the sum of any increase in actual emissions from a particular physical change or change in method of operation at a source, and any other increases and decreases in actual emissions at the …

Section 203.209 Significant Emissions Determination a) A net emission increase in the pollutant emitted is significant if the rate of emission is equal to or in excess of the following: 1) Carbon monoxide: 100 tons per year (tpy) 2) Nitrogen oxides: 40 tpy for a nonattainment are…

Section 203.210 Relaxation of a Source-Specific Limitation a) No person shall cause or allow the operation of a source so as to exceed any enforceable limitation which affects or defines the applicability of the requirements of this Part to a stationary source or modification by …

Section 203.2100 Applicability a) The Agency may approve the use of an actuals PAL for any existing major stationary source, except as provided in subsection (b), if the PAL meets the requirements in this Subpart. The term "PAL" shall mean "actuals PAL" throughout this Subpart. b…

Section 203.211 Permit Exemption Based on Fugitive Emissions The provisions of this Part shall not apply to a source or modification that would be a major stationary source or major modification only if fugitive emissions, to the extent quantifiable as evidenced by 35 Ill. Adm. C…

Section 203.2110 Definitions For this Subpart, the definitions in Section 203.2120 through Section 203.2290 apply. When a term is not defined in these Sections, it shall have the meaning given in Subpart I of this Part, Part 211, or in the CAA. (Source: Added at 49 Ill. Reg. 6237…

Section 203.2120 Actuals PAL "Actuals PAL" for a major stationary source means a PAL based on the baseline actual emissions (as defined in Section 203.1070) of all emissions units (as defined in Section 203.1160) at the source, that emit or have the potential to emit the PAL poll…

Section 203.2130 Allowable Emissions "Allowable emissions" means "allowable emissions" as defined in Section 203.1050, except that the allowable emissions for any emissions unit shall be calculated considering any emission limitations that are enforceable as a practical matter on…

Section 203.2140 Best Available Control Technology (BACT) "Best available control technology" or "BACT" means an emissions limitation (including a visible emissions standard) based on the maximum degree of reduction for each regulated NSR pollutant that would be emitted from any …

Section 203.2150 Continuous Emissions Monitoring System (CEMS) "Continuous emissions monitoring system" or "CEMS" means all of the equipment that may be required to meet the data acquisition and availability requirements of this Subpart, to sample, condition (if applicable), anal…

Section 203.2160 Continuous Emissions Rate Monitoring System (CERMS) "Continuous emissions rate monitoring system" or "CERMS" means the total equipment required for the determination and recording of the pollutant mass emissions rate (in terms of mass per unit of time). (Source: …

Section 203.2170 Continuous Parameter Monitoring System (CPMS) "Continuous parameter monitoring system" or "CPMS" means all of the equipment necessary to meet the data acquisition and availability requirements of this Subpart to monitor process and control device operational para…

Section 203.2180 Federal Land Manager "Federal Land Manager" means, with respect to any lands in the United States, the Secretary of the department with authority over the lands. (Source: Added at 49 Ill. Reg. 6237, effective April 23, 2025)

Section 203.2190 Major Emissions Unit "Major emissions unit" means: a) Any emissions unit that emits or has the potential to emit 100 tpy or more of the PAL pollutant in an attainment area; or b) Any emissions unit that emits or has the potential to emit the PAL pollutant in an a…

Section 203.2200 Plantwide Applicability Limitation (PAL) "Plantwide applicability limitation" or ("PAL") means an emission limitation expressed in tons per year, for a pollutant at a major stationary source, that is enforceable as a practical matter and established source-wide i…

Section 203.2210 PAL Effective Date "PAL effective date" generally means the date of issuance of the PAL permit. However, the PAL effective date for an increased PAL is the date any emissions unit that is part of the PAL major modification becomes operational and begins to emit t…

Section 203.2220 PAL Effective Period "PAL effective period" means the period beginning with the PAL effective date and ending 10 years later. (Source: Added at 49 Ill. Reg. 6237, effective April 23, 2025)

Section 203.2230 PAL Major Modification "PAL major modification" means, notwithstanding Section 203.1220 and Section 203.1260 (the definitions for major modification and net emissions increase), any physical change in or change in the method of operation of the PAL source that ca…

Section 203.2240 PAL Permit "PAL permit" means the major NSR permit, the minor NSR permit, or the State operating permit under a program that is approved into the SIP, or the CAAPP permit issued by the Agency that establishes a PAL for a major stationary source. (Source: Added at…

Section 203.2250 PAL Pollutant "PAL pollutant" means the pollutant for which a PAL is established at a major stationary source. (Source: Added at 49 Ill. Reg. 6237, effective April 23, 2025)