340-244-0030 General Provisions for Stationary Sources: Definitions Except as provided in OAR 340-244-0220 and -0232, the definitions in OAR 340-200-0020, 340-218-0030 and this rule apply to this division. If the same term is defined in this rule and OAR 340-200-0020 or 340-218-0030, the definition in this rule applies to this division. (1) "Affected source" is as defined in 40 CFR 63.2. (2) "Area Source" means any stationary source which has the potential to emit hazardous air pollutants but is not a major source of hazardous air pollutants. (3) "CFR" means the January 1, 2025 edition Code of Federal Regulations unless otherwise identified. (4) "Construct a major source" means to fabricate, erect, or install at any greenfield site a stationary source or group of stationary sources which is located within a contiguous area and under common control and which emits or has the potential to emit 10 tons per year of any HAPs or 25 tons per year of any combination of HAP, or to fabricate, erect, or install at any developed site a new process or production unit which in and of itself emits or has the potential to emit 10 tons per year of any HAP or 25 tons per year of any combination of HAP, unless the process or production unit satisfies criteria in paragraphs (a) through (f) of this definition: (a) All HAP emitted by the process or production unit that would otherwise be controlled under the requirements of 40 CFR Part 63, Subpart B will be controlled by emission control equipment which was previously installed at the same site as the process or production unit; (b) DEQ has determined within a period of 5 years prior to the fabrication, erection, or installation of the process or production unit that the existing emission control equipment represented the best available control technology (BACT), lowest achievable emission rate (LAER) under 40 CFR Part 51 or 52, toxics-best available control technology (T-BACT), or MACT based on State air toxic rules for the category of pollutants which includes those HAP to be emitted by the process or production unit; or DEQ determines that the control of HAP emissions provided by the existing equipment will be equivalent to that level of control currently achieved by other well-controlled similar sources (i.e., equivalent to the level of control that would be provided by a current BACT, LAER, T-BACT, or State air toxic rule MACT determination). (c) DEQ determines that the percent control efficiency for emission of HAP from all sources to be controlled by the existing control equipment will be equivalent to the percent control efficiency provided by the control equipment prior to the inclusion of the new process or production unit; (d) DEQ has provided notice and an opportunity for public comment concerning its determination that criteria in paragraphs (a), (b), and (c) of this definition apply and concerning the continued adequacy of any prior LAER, BACT, T-BACT, or State air toxic rule MACT determination; (e) If any commenter has asserted that a prior LAER, BACT, T-BACT, or State air toxic rule MACT determination is no longer adequate, DEQ has determined that the level of control required by that prior determination remains adequate; and (f) Any emission limitations, work practice requirements, or other terms and conditions upon which the above determinations by DEQ are predicated will be construed by DEQ as applicable requirements under section 504(a) and either have been incorporated into any existing Title V permit for the affected facility or will be incorporated into such permit upon issuance. (5) "Emissions Limitation" and "Emissions Standard" mean a requirement adopted by DEQ or Regional Agency, or proposed or promulgated by the Administrator of the EPA, which limits the quantity, rate, or concentration of emissions of air pollutants on a continuous basis, including any requirements which limit the level of opacity, prescribe equipment, set fuel specifications, or prescribe operation or maintenance procedures for a source to assure continuous emission reduction. (6) "Equipment leaks" means leaks from pumps, compressors, pressure relief devices, sampling connection systems, open ended valves or lines, valves, connectors, agitators, accumulator vessels, and instrumentation systems in hazardous air pollutant service. (7) "Existing Source" means any source, the construction of which commenced prior to proposal of an applicable standard under sections 112 or 129 of the FCAA. (8) "Facility" means all or part of any public or private building, structure, installation, equipment, or vehicle or vessel, including but not limited to ships. (9) "Gasoline" means any petroleum distillate or petroleum distillate/alcohol blend having a Reid vapor pressure of 27.6 kilopascals (4.0 psi) or greater, which is used as a fuel for internal combustion engines. (10) "Hazardous Air Pollutant" (HAP) means an air pollutant listed by the EPA under section 112(b) of the FCAA or determined by the Commission to cause, or reasonably be anticipated to cause, adverse effects to human health or the environment. (11) "Major Source" means any stationary source or group of stationary sources located within a contiguous area and under common control that emits or has the potential to emit considering controls, in the aggregate, 10 tons per year or more of any hazardous air pollutant or 25 tons per year or more of any combination of hazardous air pollutants. The EPA may establish a lesser quantity, or in the case of radionuclides different criteria, for a major source on the basis of the potency of the air pollutant, persistence, potential for bioaccumulation, other characteristics of the air pollutant, or other relevant factors. (12) "Maximum Achievable Control Technology (MACT)" means an emission standard applicable to major sources of hazardous air pollutants that requires the maximum degree of reduction in emissions deemed achievable for either new or existing sources. (13) "Motor vehicle" means any self-propelled vehicle designed for transporting persons or property on a street or highway. (14) "Nonroad engine" means an internal combustion engine (including the fuel system) that is not used in a motor vehicle or a vehicle used solely for competition, or that is not subject to standards promulgated under section 7411 or 7521 of title 40 of the CFR. (15) "Nonroad vehicle" means a vehicle that is powered by a nonroad engine, and that is not a motor vehicle or a vehicle used solely for competition. (16) "New Source" means a stationary source, the construction of which is commenced after proposal of a federal MACT or January 3, 1993 of this Division, whichever is earlier. (17) "Potential to Emit" means the maximum capacity of a stationary source to emit any air pollutant under its physical and operational design. Any physical or operational limitation on the capacity of a source to emit an air pollutant, including air pollution control equipment and restrictions on hours of operation or on the type or amount of material combusted, stored, or processed, must be treated as part of its design if the limitation is enforceable by the EPA. This section does not alter or affect the use of this section for any other purposes under the Act, or the term "capacity factor" as used in Title IV of the Act or the regulations promulgated thereunder. Secondary emissions shall not be considered in determining the potential to emit of a source. (18) "Reconstruct a Major Source" means the replacement of components at an existing process or production unit that in and of itself emits or has the potential to emit 10 tons per year of any HAP or 25 tons per year of any combination of HAP, whenever: the fixed capital cost of the new components exceeds 50 percent of the fixed capital cost that would be required to construct a comparable process or production unit; and; it is technically and economically feasible for the reconstructed major source to meet the applicable maximum achievable control technology emission limitation for new sources established under 40 CFR Part 63 Subpart B. (19) "Regulated Air Pollutant" as used in this Division means: (a) Any pollutant listed under OAR 340-244-0040; or (b) Any pollutant that is subject to a standard promulgated under Section 129 of the Act. (20) "Section 112(n)" means that subsection of the FCAA that includes requirements for the EPA to conduct studies on the hazards to public health prior to developing emissions standards for specified categories of hazardous air pollutant emission sources. (21) "Section 112(r)" means that subsection of the FCAA that includes requirements for the EPA promulgate regulations for the prevention, detection and correction of accidental releases. (22) "Solid Waste Incineration Unit" as used in this Division has the same meaning as given in Section 129(g) of the FCAA. (23) "Stationary Source", as used in OAR 340 division 244, means any building, structure, facility, or installation which emits or may emit any regulated air pollutant; Publications: Publications referenced are available from DEQ. NOTE: This rule is included in the State of Oregon Clean Air Act Implementation Plan that EQC adopted under OAR 340-200-0040. Statutory/Other Authority: ORS 468.020 & 468A.025 Statutes/Other Implemented: ORS 468A.040 History: DEQ 27-2025, amend filed 08/18/2025, effective 08/18/2025 DEQ 4-2024, amend filed 03/25/2024, effective 03/25/2024 DEQ 5-2022, amend filed 04/07/2022, effective 04/07/2022 DEQ 1-2021, amend filed 01/21/2021, effective 01/21/2021 DEQ 18-2019, amend filed 07/19/2019, effective 07/19/2019 DEQ 6-2017, f. & cert. ef. 7-13-17 DEQ 8-2015, f. & cert. ef. 4-17-15 DEQ 4-2013, f. & cert. ef. 3-27-13 DEQ 1-2011, f. & cert. ef. 2-24-11 DEQ 8-2009, f. & cert. ef. 12-16-09 DEQ 15-2008, f. & cert. ef 12-31-08 DEQ 13-2006, f. & cert. ef. 12-22-06 DEQ 2-2006, f. & cert. ef. 3-14-06 DEQ 2-2005, f. & cert. ef. 2-10-05 DEQ 14-1999, f. & cert. ef. 10-14-99, Renumbered from 340-032-0120 DEQ 18-1998, f. & cert. ef. 10-5-98 DEQ 20-1997, f. & cert. ef. 9-25-97 DEQ 26-1996, f. & cert. ef. 11-26-96 DEQ 22-1995, f. & cert. ef. 10-6-95 DEQ 24-1994, f. & cert. ef. 10-28-94 DEQ 18-1993, f. & cert. ef. 11-4-93 DEQ 13-1993, f. & cert. ef. 9-24-93