Iowa Admin. Code r. 567-33.3 - PSD construction permit requirements for major stationary sources

(1) Definitions. Definitions included in this subrule apply to the provisions set forth in this rule (PSD program requirements). For purposes of this rule and unless otherwise noted, the definitions herein apply. Definitions that are adopted by reference from 40 CFR 51.166 or 52.21 are as amended through July 19, 2021, unless otherwise noted. The following phrases contained in 40 CFR 51.166 are not adopted by reference: "it shall also provide that," "mechanism whereby," "the plan may provide that," "the plan provides that," "the plan shall provide," and "the plan shall provide that." Additionally, the term "the plan" shall mean "State Implementation Plan" or "SIP."

For purposes of this rule, the following terms have the meanings indicated in this subrule:

"Act" means the Clean Air Act, 42 U.S.C. Sections 7401, et seq., as amended through November 15, 1990.

"Actual emissions" means:

1. The actual rate of emissions of a regulated NSR pollutant from an emissions unit, as determined in accordance with paragraphs "2" through "4," except that this definition shall not apply for calculating whether a significant emissions increase has occurred, or for establishing a PAL under 567-33.9 (455B). Instead, the requirements specified under the definitions for "projected actual emissions" and "baseline actual emissions" shall apply for those purposes.
2. In general, actual emissions as of a particular date shall equal the average rate, in tons per year, at which the unit actually emitted the pollutant during a consecutive 24-month period that precedes the particular date and that is representative of normal source operation. The department shall allow the use of a different time period upon a determination that it is more representative of normal source operation. Actual emissions shall be calculated using the unit's actual operating hours, production rates, and types of materials processed, stored, or combusted during the selected time period.
3. The department may presume that source-specific allowable emissions for the unit are equivalent to the actual emissions of the unit.
4. For any emissions unit that has not begun normal operations on the particular date, actual emissions shall equal the potential to emit of the unit on that date.

"Administrator" means the administrator for the United States Environmental Protection Agency (EPA) or designee.

"Allowable emissions" means the emissions rate of a stationary source calculated using the maximum rated capacity of the source (unless the source is subject to federally enforceable limits or enforceable permit conditions that restrict the operating rate, or hours of operation, or both) and the most stringent of the following:

1. The applicable standards as set forth in 567-subrules 23.1(2) through 23.1(5) (new source performance standards, emissions standards for hazardous air pollutants, and federal emissions guidelines) or an applicable federal standard not adopted by the state, as set forth in 40 CFR Parts 60, 61 and 63;
2. The applicable SIP emissions limitation, including those with a future compliance date; or
3. The emissions rate specified as an enforceable permit condition, including those with a future compliance date.

"Baseline actual emissions," for the purposes of this chapter, means the rate of emissions, in tons per year, of a regulated NSR pollutant, as "regulated NSR pollutant" is defined in this subrule, and as determined in accordance with paragraphs "1" through "4."

1. For any existing electric utility steam generating unit, "baseline actual emissions" means the average rate, in tons per year, at which the unit actually emitted the pollutant during any consecutive 24-month period selected by the owner or operator within the five-year period immediately preceding the date on which the owner or operator begins actual construction of the project. The department shall allow the use of a different time period upon a determination that it is more representative of normal source operation.
(a) The average rate shall include fugitive emissions to the extent quantifiable and emissions associated with startups, shutdowns, and malfunctions.
(b) The average rate shall be adjusted downward to exclude any noncompliant emissions that occurred while the source was operating above an emissions limitation that was legally enforceable during the consecutive 24-month period.
(c) For a regulated NSR pollutant, when a project involves multiple emissions units, only one consecutive 24-month period must be used to determine the baseline actual emissions for the emissions units being changed. A different consecutive 24-month period may be used for each regulated NSR pollutant.
(d) The average rate shall not be based on any consecutive 24-month period for which there is inadequate information for determining annual emissions, in tons per year, and for adjusting this amount if required by paragraph "1"(b).
2. For an existing emissions unit, other than an electric utility steam generating unit, "baseline actual emissions" means the average rate, in tons per year, at which the emissions unit actually emitted the pollutant during any consecutive 24-month period selected by the owner or operator within the ten-year period immediately preceding either the date on which the owner or operator begins actual construction of the project, or the date on which a complete permit application is received by the department for a permit required either under this chapter or under a SIP approved by the Administrator, whichever is earlier, except that the ten-year period shall not include any period earlier than November 15, 1990.
(a) The average rate shall include fugitive emissions to the extent quantifiable and emissions associated with startups, shutdowns, and malfunctions.
(b) The average rate shall be adjusted downward to exclude any noncompliant emissions that occurred while the source was operating above an emissions limitation that was legally enforceable during the consecutive 24-month period.
(c) The average rate shall be adjusted downward to exclude any emissions that would have exceeded an emissions limitation with which the major stationary source must currently comply, had such major stationary source been required to comply with such limitations during the consecutive 24-month period. However, if an emissions limitation is part of a maximum achievable control technology standard that the Administrator proposed or promulgated under 40 CFR Part 63, the baseline actual emissions need only be adjusted if the state has taken credit for such emissions reductions in an attainment demonstration or maintenance plan consistent with the requirements of 40 CFR 51.165(a)(3)(ii)(G) as amended through November 29, 2005.
(d) For a regulated NSR pollutant, when a project involves multiple emissions units, only one consecutive 24-month period must be used to determine the baseline actual emissions for the emissions units being changed. A different consecutive 24-month period may be used for each regulated NSR pollutant.
(e) The average rate shall not be based on any consecutive 24-month period for which there is inadequate information for determining annual emissions, in tons per year, and for adjusting this amount if required by paragraphs "2"(b) and "2"(c).
3. For a new emissions unit, the baseline actual emissions for purposes of determining the emissions increase that will result from the initial construction and operation of such unit shall equal zero; and thereafter, for all other purposes, shall equal the unit's potential to emit.
4. For a PAL for a stationary source, the baseline actual emissions shall be calculated for existing electric utility steam generating units in accordance with the procedures contained in paragraph "1," for other existing emissions units in accordance with the procedures contained in paragraph "2," and for a new emissions unit in accordance with the procedures contained in paragraph "3."

"Baseline area" means:

1. Any intrastate area (and every part thereof) designated as attainment or unclassifiable under Section 107(d)(1)(A)(ii) or (iii) of the Act in which the major source or major modification establishing the minor source baseline date would construct or would have an air quality impact for the pollutant for which the baseline date is established, as follows: equal to or greater than 1 µg/m3 (annual average) for sulfur dioxide (SO2), nitrogen dioxide (NO2) or PM10; or equal to or greater than 0.3 µg/m3 (annual average) for PM2.5.
2. Area redesignations under Section 107(d)(1)(A)(ii) or (iii) of the Act cannot intersect or be smaller than the area of impact of any major stationary source or major modification that establishes a minor source baseline date or is subject to regulations specified in this rule, in 40 CFR 52.21 (PSD requirements), or in department rules approved by EPA and published in 40 CFR Part 51, Subpart I, as amended through October 20, 2010, and would be constructed in the same state as the state proposing the redesignation.
3. Any baseline area established originally for the total suspended particulate increments shall remain in effect and shall apply for purposes of determining the amount of available PM10 increments, except that such baseline area shall not remain in effect if the permitting authority rescinds the corresponding minor source baseline date in accordance with the definition of "baseline date" specified in this subrule.

"Baseline concentration" means:

1. The ambient concentration level that exists in the baseline area at the time of the applicable minor source baseline date. A baseline concentration is determined for each pollutant for which a minor source baseline date is established and shall include:
(a) The actual emissions representative of sources in existence on the applicable minor source baseline date, except as provided in paragraph "2";
(b) The allowable emissions of major stationary sources that commenced construction before the major source baseline date but were not in operation by the applicable minor source baseline date.
2. The following will not be included in the baseline concentration and will affect the applicable maximum allowable increase(s):
(a) Actual emissions from any major stationary source on which construction commenced after the major source baseline date; and
(b) Actual emissions increases and decreases at any stationary source occurring after the minor source baseline date.

"Baseline date" means:

1. Either "major source baseline date" or "minor source baseline date" as follows:
(a) The "major source baseline date" means, in the case of PM10 and sulfur dioxide, January 6, 1975; in the case of nitrogen dioxide, February 8, 1988; and in the case of PM2.5, October 20, 2010.
(b) The "minor source baseline date" means the earliest date after the trigger date on which a major stationary source or a major modification subject to 40 CFR 52.21 as amended through October 20, 2010, or subject to this rule (PSD program requirements), or subject to a department rule approved by EPA and published in 40 CFR Part 51, Subpart I, as amended through October 20, 2010, submits a complete application under the relevant regulations. The trigger date for PM10 and sulfur dioxide is August 7, 1977. For nitrogen dioxide, the trigger date is February 8, 1988. For PM2.5, the trigger date is October 20, 2011.
2. The "baseline date" is established for each pollutant for which increments or other equivalent measures have been established if:
(a) The area in which the proposed source or modification would construct is designated as attainment or unclassifiable under Section 107(d)(1)(A)(ii) or (iii) of the Act for the pollutant on the date of its complete application under 40 CFR 52.21 as amended through October 20, 2010, or under regulations specified in this rule (PSD program requirements); and
(b) In the case of a major stationary source, the pollutant would be emitted in significant amounts, or in the case of a major modification, there would be a significant net emissions increase of the pollutant.

Any minor source baseline date established originally for the total suspended particulate increments shall remain in effect and shall apply for purposes of determining the amount of available PM10 increments, except that the reviewing authority may rescind any such minor source baseline date where it can be shown, to the satisfaction of the reviewing authority, that the emissions increase from the major stationary source, or the net emissions increase from the major modification, responsible for triggering that date did not result in a significant amount of PM10 emissions.

"Begin actual construction" means, in general, initiation of physical on-site construction activities on an emissions unit that are of a permanent nature. Such activities include, but are not limited to, installation of building supports and foundations, laying of underground pipework, and construction of permanent storage structures. With respect to a change in method of operation, this term refers to those on-site activities, other than preparatory activities, that mark the initiation of the change.

"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 proposed major stationary source or major modification that the reviewing authority, on a case-by-case basis, taking into account energy, environmental, and economic impacts and other costs, determines is achievable for such source or modification through application of production processes or available methods, systems, and techniques, including fuel cleaning or treatment or innovative fuel combination techniques for control of such pollutant. In no event shall application of best available control technology result in emissions of any pollutant that would exceed the emissions allowed by any applicable standard under 567-subrules 23.1(2) through 23.1(5) (standards for new stationary sources, federal standards for hazardous air pollutants, and federal emissions guidelines), or federal regulations as set forth in 40 CFR Parts 60, 61 and 63 but not adopted by the state. If the department determines that technological or economic limitations on the application of measurement methodology to a particular emissions unit would make the imposition of an emissions standard infeasible, a design, equipment, work practice, operational standard or combination thereof may be prescribed instead to satisfy the requirement for the application of best available control technology. Such standard shall, to the degree possible, set forth the emissions reduction achievable by implementation of such design, equipment, work practice or operation and shall provide for compliance by means that achieve equivalent results.

"Building, structure, facility, or installation" means all of the pollutant-emitting activities that belong to the same industrial grouping, are located on one or more contiguous or adjacent properties, and are under the control of the same person (or persons under common control) except the activities of any vessel. Pollutant-emitting activities shall be considered as part of the same industrial grouping if they belong to the same major group (i.e., that have the same two-digit code) as described in the Standard Industrial Classification Manual, 1972, as amended by the 1977 Supplement (U.S. Government Printing Office stock numbers 4101-0066 and 003-005-00176-0, respectively).

"CFR" means the Code of Federal Regulations, with standard references in this chapter by title and part, so that " 40 CFR 51 " or " 40 CFR Part 51 " means "Title 40 Code of Federal Regulations, Part 51."

"Clean coal technology" means the definition of "clean coal technology" set forth in 40 CFR 52.21(b)(34) and is adopted by reference.

"Clean coal technology demonstration project" means the definition of "clean coal technology demonstration project" set forth in 40 CFR 52.21(b)(35) and is adopted by reference.

"Commence," as applied to construction of a major stationary source or major modification, means that the owner or operator has all necessary preconstruction approvals or permits and either has:

1. Begun, or caused to begin, a continuous program of actual on-site construction of the source, to be completed within a reasonable time; or
2. Entered into binding agreements or contractual obligations, which cannot be canceled or modified without substantial loss to the owner or operator, to undertake a program of actual construction of the source to be completed within a reasonable time.

"Complete" means, in reference to an application for a permit, that the application contains all the information necessary for processing the application. Designating an application complete for purposes of permit processing does not preclude the department from requesting or accepting any additional information.

"Construction" means any physical change or change in the method of operation, including fabrication, erection, installation, demolition, or modification of an emissions unit, that would result in a change in emissions.

"Continuous emissions monitoring system" or "CEMS" means the definition of "continuous emissions monitoring system" set forth in 40 CFR 52.21(b)(44) and is adopted by reference.

"Continuous emissions rate monitoring system" or "CERMS" means the definition of "continuous emissions rate monitoring system" set forth in 40 CFR 52.21(b)(47) and is adopted by reference.

"Continuous parameter monitoring system" or "CPMS" means the definition of "continuous parameter monitoring system" set forth in 40 CFR 52.21(b)(46) and is adopted by reference.

"Electric utility steam generating unit" means any steam electric generating unit that is constructed for the purpose of supplying more than one-third of its potential electric output capacity and more than 25 MW electrical output to any utility power distribution system for sale. Any steam supplied to a steam distribution system for the purpose of providing steam to a steam-electric generator that would produce electrical energy for sale is also considered in determining the electrical energy output capacity of the affected facility.

"Emissions unit" means any part of a stationary source that emits or would have the potential to emit any regulated NSR pollutant and includes an electric utility steam generating unit. For purposes of this chapter, there are two types of emissions units:

1. A new emissions unit is any emissions unit that is (or will be) newly constructed and that has existed for less than two years from the date such emissions unit first operated.
2. An existing emissions unit is any emissions unit that does not meet the requirements in paragraph "1." A replacement unit is an existing emissions unit.

"Enforceable permit condition," for the purpose of this chapter, means any of the following limitations and conditions: requirements developed pursuant to new source performance standards, prevention of significant deterioration standards, emissions standards for hazardous air pollutants, requirements within the SIP, and any permit requirements established pursuant to this chapter, any permit requirements established pursuant to 40 CFR 52.21 or Part 51, Subpart I, as amended through October 20, 2010, or under construction or Title V operating permit rules.

"Federal land manager" means, with respect to any lands in the United States, the secretary of the department with authority over such lands.

"Federally enforceable" means all limitations and conditions that are enforceable by the Administrator and the department, including those federal requirements not adopted by the state, developed pursuant to 40 CFR Parts 60, 61 and 63; requirements within 567-subrules 23.1(2) through 23.1(5); requirements within the SIP; any permit requirements established pursuant to 40 CFR 52.21 or under regulations approved pursuant to 40 CFR Part 51, Subpart I, as amended through October 20, 2010, including operating permits issued under an EPA-approved program, that are incorporated into the SIP and expressly require adherence to any permit issued under such program.

"Fugitive emissions" means those emissions that could not reasonably pass through a stack, chimney, vent, or other functionally equivalent opening.

"High terrain" means any area having an elevation 900 feet or more above the base of the stack of a source.

"Indian governing body" means the governing body of any tribe, band, or group of Indians subject to the jurisdiction of the United States and recognized by the United States as possessing power of self-government.

"Indian reservation" means any federally recognized reservation established by treaty, agreement, executive order, or Act of Congress.

"Innovative control technology" means the definition of "innovative control technology" set forth in 40 CFR 52.21(b)(19) and is adopted by reference.

"Lowest achievable emissions rate" or "LAER" means the definition of "lowest achievable emissions rate" or "LAER" set forth in 40 CFR 52.21(b)(53) and is adopted by reference.

"Low terrain" means any area other than high terrain.

"Major modification" means any physical change in or change in the method of operation of a major stationary source that would result in a significant emissions increase of a regulated NSR pollutant and a significant net emissions increase of that pollutant from the major stationary source.

1. Any significant emissions increase from any emissions units or net emissions increase at a major stationary source that is significant for volatile organic compounds or NOx shall be considered significant for ozone.
2. A physical change or change in the method of operation shall not include:
(a) Routine maintenance, repair and replacement;
(b) Use of an alternative fuel or raw material by reason of any order under Section 2(a) and (b) of the Energy Supply and Environmental Coordination Act of 1974 or by reason of a natural gas curtailment plan pursuant to the Federal Power Act;
(c) Use of an alternative fuel by reason of an order or rule under Section 125 of the Act;
(d) Use of an alternative fuel at a steam generating unit to the extent that the fuel is generated from municipal solid waste;
(e) Use of an alternative fuel or raw material by a stationary source that the source was capable of accommodating before January 6, 1975, unless such change would be prohibited under any federally enforceable permit condition, or that the source is approved to use under any federally enforceable permit condition;
(f) An increase in the hours of operation or in the production rate, unless such change would be prohibited under any federally enforceable permit condition that was established after January 6, 1975;
(g) Any change in ownership at a stationary source;
(h) Reserved.
(i) The installation, operation, cessation, or removal of a temporary clean coal technology demonstration project, provided that the project complies with the requirements within the SIP; and other requirements necessary to attain and maintain the national ambient air quality standards during the project and after the project is terminated;
(j) The installation or operation of a permanent clean coal technology demonstration project that constitutes repowering, provided that the project does not result in an increase in the potential to emit of any regulated pollutant emitted by the unit. This exemption shall apply on a pollutant-by-pollutant basis;
(k) The reactivation of a very clean coal-fired electric utility steam generating unit.
3. This definition shall not apply with respect to a particular regulated NSR pollutant when the major stationary source is complying with the requirements under 567-33.9 (455B) for a PAL for that pollutant. Instead, the definition under 567-33.9 (455B) shall apply.

"Major source baseline date" is defined under the definition of "baseline date."

"Major stationary source" means:

1.
(a) Any one of the following stationary sources of air pollutants that emits, or has the potential to emit, 100 tons per year or more of any regulated NSR pollutant:

* Fossil fuel-fired steam electric plants of more than 250 million British thermal units per hour heat input;

* Coal cleaning plants (with thermal dryers);

* Kraft pulp mills;

* Portland cement plants;

* Primary zinc smelters;

* Iron and steel mill plants;

* Primary aluminum ore reduction plants;

* Primary copper smelters;

* Municipal incinerators capable of charging more than 50 tons of refuse per day;

* Hydrofluoric, sulfuric, and nitric acid plants;

* Petroleum refineries;

* Lime plants;

* Phosphate rock processing plants;

* Coke oven batteries;

* Sulfur recovery plants;

* Carbon black plants (furnace process);

* Primary lead smelters;

* Fuel conversion plants;

* Sintering plants;

* Secondary metal production plants;

* Chemical process plants (which does not include ethanol production facilities that produce ethanol by natural fermentation included in NAICS code 325193 or 312140);

* Fossil-fuel boilers (or combinations thereof) totaling more than 250 million British thermal units per hour heat input;

* Petroleum storage and transfer units with a total storage capacity exceeding 300,000 barrels;

* Taconite ore processing plants;

* Glass fiber processing plants; and

* Charcoal production plants.

(b) Notwithstanding the stationary source size specified in paragraph "1"(a), any stationary source that emits, or has the potential to emit, 250 tons per year or more of a regulated NSR pollutant; or
(c) Any physical change that would occur at a stationary source not otherwise qualifying under this definition as a major stationary source if the change would constitute a major stationary source by itself.
2. A major source that is major for volatile organic compounds or NOxshall be considered major for ozone.
3. The fugitive emissions of a stationary source shall not be included in determining for any of the purposes of this rule whether it is a major stationary source, unless the source belongs to one of the categories of stationary sources listed in paragraph "1"(a) or to any other stationary source category that, as of August 7, 1980, is being regulated under Section 111 or 112 of the Act.

"Minor source baseline date" is defined under the definition of "baseline date."

"Necessary preconstruction approvals or permits" means those permits or approvals required under federal air quality control laws and regulations and those air quality control laws and regulations that are part of the SIP.

"Net emissions increase" means, with respect to any regulated NSR pollutant emitted by a major stationary source, the amount by which the following exceeds zero:

* The increase in emissions from a particular physical change or change in the method of operation at a stationary source as calculated according to the applicability requirements under 33.3(2); and

* Any other increases and decreases in actual emissions at the major stationary source that are contemporaneous with the particular change and are otherwise creditable. Baseline actual emissions for calculating increases and decreases under this definition of "net emissions increase" shall be determined as provided for under the definition of "baseline actual emissions," except that paragraphs "1"(c) and "2"(d) of the definition of "baseline actual emissions," which describe provisions for multiple emissions units, shall not apply.

1. An increase or decrease in actual emissions is contemporaneous with the increase from the particular change only if the increase or decrease in actual emissions occurs between the date five years before construction on the particular change commences and the date that the increase from the particular change occurs.
2. An increase or decrease in actual emissions is creditable only if:
(a) The increase or decrease in actual emissions occurs within the contemporaneous time period, as noted in paragraph "1" of this definition; and
(b) The department has not relied on the increase or decrease in actual emissions in issuing a permit for the source under this rule, which permit is in effect when the increase in actual emissions from the particular change occurs.
3. An increase or decrease in actual emissions of sulfur dioxide, particulate matter, or nitrogen oxides that occurs before the applicable minor source baseline date is creditable only if the increase or decrease in actual emissions is required to be considered in calculating the amount of maximum allowable increases remaining available.
4. An increase in actual emissions is creditable only to the extent that the new level of actual emissions exceeds the old level.
5. A decrease in actual emissions is creditable only to the extent that:
(a) The old level of actual emissions or the old level of allowable emissions, whichever is lower, exceeds the new level of actual emissions;
(b) The decrease in actual emissions is enforceable as a practical matter at and after the time that actual construction on the particular change begins; and
(c) The decrease in actual emissions has approximately the same qualitative significance for public health and welfare as that attributed to the increase from the particular change.
6. An increase that results from a physical change at a source occurs when the emissions unit on which construction occurred becomes operational and begins to emit a particular pollutant. Any replacement unit that requires shakedown becomes operational only after a reasonable shakedown period, not to exceed 180 days.
7. The definition of "actual emissions," paragraph "2," shall not apply for determining creditable increases and decreases.

"Nonattainment area" means an area so designated by the Administrator, acting pursuant to Section 107 of the Act.

"Permitting authority" means the Iowa department of natural resources or the director thereof.

"Pollution prevention" means any activity that, through process changes, product reformulation or redesign, or substitution of less polluting raw materials, eliminates or reduces the release of air pollutants (including fugitive emissions) and other pollutants to the environment prior to recycling, treatment, or disposal. "Pollution prevention" does not mean recycling (other than certain "in-process recycling" practices), energy recovery, treatment, or disposal.

"Potential to emit" means the maximum capacity of a stationary source to emit a pollutant under its physical and operational design. Any physical or operational limitation on the capacity of the source to emit a pollutant, including air pollution control equipment and restrictions on hours of operation or on the type or amount of material combusted, stored, or processed, shall be treated as part of its design if the limitation or the effect it would have on emissions is federally enforceable. Secondary emissions do not count in determining the potential to emit of a stationary source.

"Predictive emissions monitoring system" or "PEMS" means the definition of "predictive emissions monitoring system" set forth in 40 CFR 52.21(b)(45) and is adopted by reference.

"Prevention of significant deterioration (PSD) program" means a major source preconstruction permit program that has been approved by the Administrator and incorporated into the SIP or means the program in 40 CFR 52.21. Any permit issued under such a program is a major NSR permit.

"Project" means a physical change in, or change in method of operation of, an existing major stationary source.

"Projected actual emissions," for the purposes of this chapter, means the maximum annual rate, in tons per year, at which an existing emissions unit is projected to emit a regulated NSR pollutant in any one of the five years (12-month period) beginning on the first day of the month following the date when the unit resumes regular operation after the project, or in any one of the ten years following that date, if the project involves increasing the emissions unit's design capacity or its potential to emit that regulated NSR pollutant, and full utilization of the unit would result in a significant emissions increase, or a significant net emissions increase at the major stationary source. For purposes of this definition, "regular" shall be determined by the department on a case-by-case basis.

In determining the projected actual emissions before beginning actual construction, the owner or operator of the major stationary source:

1. Shall consider all relevant information including, but not limited to, historical operational data, the company's own representations, the company's expected business activity and the company's highest projections of business activity, the company's filings with the state or federal regulatory authorities, and compliance plans under the approved plan; and
2. Shall include fugitive emissions to the extent quantifiable and emissions associated with startups, shutdowns, and malfunctions; and
3. Shall exclude, in calculating any increase in emissions that results from the particular project, that portion of the unit's emissions following the project that an existing unit could have accommodated during the consecutive 24-month period used to establish the baseline actual emissions and that are also unrelated to the particular project, including any increased utilization due to product demand growth; or
4. In lieu of using the method set out in paragraphs "1" through "3," may elect to use the emissions unit's potential to emit, in tons per year.

"Reactivation of a very clean coal-fired electric utility steam generating unit" means the definition of "reactivation of a very clean coal-fired electric utility steam generating unit" set forth in 40 CFR 52.21(b)(38) and is adopted by reference.

"Regulated NSR pollutant" means the following:

1. Any pollutant for which a national ambient air quality standard has been promulgated and any constituents or precursors for such pollutants identified by the Administrator:
(a) Volatile organic compounds and nitrogen oxides are precursors to ozone in all attainment and unclassifiable areas;
(b) Sulfur dioxide is a precursor to PM2.5 in all attainment and unclassifiable areas;
(c) Nitrogen oxides are presumed to be precursors to PM2.5 in all attainment and unclassifiable areas, unless the department demonstrates to EPA's satisfaction or EPA demonstrates that emissions of nitrogen oxides from sources in a specific area are not a significant contributor to the area's ambient PM2.5 concentrations;
(d) Volatile organic compounds are presumed not to be precursors to PM2.5 in any attainment and unclassifiable areas, unless the department demonstrates to EPA's satisfaction or EPA demonstrates that emissions of volatile organic compounds from sources in a specific area are a significant contributor to that area's ambient PM2.5 concentrations;
2. Any pollutant that is subject to any standard promulgated under Section 111 of the Act;
3. Any Class I or Class II substance subject to a standard promulgated under or established by Title VI of the Act; or
4. Any pollutant that otherwise is subject to regulation under the Act as defined in 33.3(1), definition of "subject to regulation."
5. Notwithstanding paragraphs "1" through "4," the definition of "regulated NSR pollutant" shall not include any or all hazardous air pollutants that are either listed in Section 112 of the Act or added to the list pursuant to Section 112(b)(2) of the Act and that have not been delisted pursuant to Section 112(b)(3) of the Act, unless the listed hazardous air pollutant is also regulated as a constituent or precursor of a general pollutant listed under Section 108 of the Act.
6. Particulate matter (PM) emissions, PM2.5 emissions and PM10 emissions shall include gaseous emissions from a source or activity that condense to form particulate matter at ambient temperatures.

"Replacement unit" means an emissions unit for which all the criteria listed in paragraphs "1" through "4" are met. No creditable emissions reductions shall be generated from shutting down the existing emissions unit that is replaced.

1. The emissions unit is a reconstructed unit within the meaning of 40 CFR 60.15(b)(1) as amended through December 16, 1975, or the emissions unit completely takes the place of an existing emissions unit.
2. The emissions unit is identical to or functionally equivalent to the replaced emissions unit.
3. The replacement does not change the basic design parameter(s) of the process unit.
4. The replaced emissions unit is permanently removed from the major stationary source, otherwise permanently disabled, or permanently barred from operation by a permit that is enforceable as a practical matter. If the replaced emissions unit is brought back into operation, it shall constitute a new emissions unit.

"Repowering" means the definition of "repowering" set forth in 40 CFR 52.21(b)(37) and is adopted by reference.

"Reviewing authority" means the department, or the Administrator in the case of EPA-implemented permit programs under 40 CFR 52.21.

"Secondary emissions" means emissions that occur as a result of the construction or operation of a major stationary source or major modification but do not come from the major stationary source or major modification itself. For the purposes of this chapter, "secondary emissions" must be specific, well-defined, and quantifiable, and must impact the same general areas as the stationary source modification that causes the secondary emissions. "Secondary emissions" includes emissions from any offsite support facility that would not be constructed or increase its emissions except as a result of the construction or operation of the major stationary source or major modification. "Secondary emissions" does not include any emissions that come directly from a mobile source, such as emissions from the tailpipe of a motor vehicle, from a train, or from a vessel.

"Significant" means:

1. In reference to a net emissions increase or the potential of a source to emit any of the following pollutants, a rate of emissions that would equal or exceed any of the following rates:

Pollutant and Emissions Rate

* Carbon monoxide: 100 tons per year (tpy)

* Nitrogen oxides: 40 tpy

* Sulfur dioxide: 40 tpy

* Particulate matter: 25 tpy of particulate matter emissions

* PM10: 15 tpy

* PM2.5: 10 tpy of direct PM2.5 emissions; 40 tpy of sulfur dioxide emissions; 40 tpy of nitrogen oxide emissions (unless the department demonstrates to EPA's satisfaction that emissions of nitrogen oxides from sources in a specific area are not a significant contributor to the area's ambient PM2.5 concentrations)

* Ozone: 40 tpy of volatile organic compounds or NOx

* Lead: 0.6 tpy

* Fluorides: 3 tpy

* Sulfuric acid mist: 7 tpy

* Hydrogen sulfide (H2S): 10 tpy

* Total reduced sulfur (including H2S): 10 tpy

* Reduced sulfur compounds (including H2S): 10 tpy

* Municipal waste combustor organics (measured as total tetra- through octa-chlorinated dibenzo-p-dioxins and dibenzofurans): 3.2 × 10-6 megagrams per year (3.5 × 10-6 tons per year)

* Municipal waste combustor metals (measured as particulate matter): 14 megagrams per year (15 tons per year)

* Municipal waste combustor acid gases (measured as sulfur dioxide and hydrogen chloride): 36 megagrams per year (40 tons per year)

* Municipal solid waste landfill emissions (measured as nonmethane organic compounds): 45 megagrams per year (50 tons per year)

2. "Significant" means, for purposes of this rule and in reference to a net emissions increase or the potential of a source to emit a regulated NSR pollutant not listed in paragraph "1," any emissions rate.
3. Notwithstanding paragraph "1," "significant," for purposes of this rule, means any emissions rate or any net emissions increase associated with a major stationary source or major modification that would construct within ten kilometers of a Class I area and have an impact on such area equal to or greater than 1 µg/m3 (24-hour average).

"Significant emissions increase" means, for a regulated NSR pollutant, an increase in emissions that is significant for that pollutant.

"State implementation plan" or "SIP" means the plan adopted by the state of Iowa and approved by the Administrator that provides for implementation, maintenance, and enforcement of such primary and secondary ambient air quality standards as they are adopted by the Administrator, pursuant to the Act.

"Stationary source" means any building, structure, facility, or installation that emits or may emit a regulated NSR pollutant.

"Subject to regulation" means, for any air pollutant, that the pollutant is subject to either a provision in the Act, or a nationally applicable regulation codified by the Administrator and published in 40 CFR Subchapter C (Air Programs) that requires actual control of the quantity of emissions of that pollutant, and that such a control requirement has taken effect and is operative to control, limit or restrict the quantity of emissions of that pollutant released from the regulated activity, except that:

1. Greenhouse gases (GHGs), the air pollutant defined in 40 CFR 86.1818-12(a) (as amended through September 15, 2011) as the aggregate group of six greenhouse gases that includes carbon dioxide, nitrous oxide, methane, hydrofluorocarbons, perfluorocarbons, and sulfur hexafluoride, shall not be subject to regulation except as provided in paragraph "4," and shall not be subject to regulation if the stationary source maintains its total sourcewide emissions below the GHG PAL level, meets the requirements in 567-33.9 (455B), and complies with the PAL permit containing the GHG PAL.
2. For purposes of paragraphs "3" and "4," the term "tpy CO2 equivalent emissions (CO2e)" shall represent an amount of GHGs emitted and shall be computed as follows:
(a) Multiply the mass amount of emissions (tpy) for each of the six greenhouse gases in the pollutant GHGs by the associated global warming potential of the gas published at 40 CFR Part 98, Subpart A, Table A-1, "Global Warming Potentials," (as amended through December 24, 2014). For purposes of this definition, prior to July 21, 2014, the mass of the greenhouse gas carbon dioxide shall not include carbon dioxide emissions resulting from the combustion or decomposition of non-fossilized and biodegradable organic material originating from plants, animals, or microorganisms (including products, by-products, residues and waste from agriculture, forestry and related industries as well as the non-fossilized and biodegradable organic fractions of industrial and municipal wastes, including gases and liquids recovered from the decomposition of non-fossilized and biodegradable organic material).
(b) Sum the resultant value from paragraph (a) for each gas to compute a tpy CO2e.
3. The term "emissions increase," as used in this paragraph and in paragraph "4," shall mean that both a significant emissions increase (as calculated using the procedures specified in 33.3(2)"c" through "h") and a significant net emissions increase (as specified in 33.3(1), in the definitions of "net emissions increase" and "significant") occur. For the pollutant GHGs, an emissions increase shall be based on tpy CO2e and shall be calculated assuming the pollutant GHGs are a regulated NSR pollutant, and "significant" is defined as 75,000 tpy CO2e rather than calculated by applying the value specified in 33.3(1), in paragraph "2" of the definition of "significant."
4. Beginning January 2, 2011, the pollutant GHGs are subject to regulation if:
(a) The stationary source is a new major stationary source for a regulated NSR pollutant that is not a GHG, and also will emit or will have the potential to emit 75,000 tpy CO2e or more, or
(b) The stationary source is an existing major stationary source for a regulated NSR pollutant that is not a GHG, and also will have an emissions increase of a regulated NSR pollutant and an emissions increase of 75,000 tpy CO2e or more.

"Temporary clean coal technology demonstration project" means the definition of "temporary clean coal technology demonstration project" set forth in 40 CFR 52.21(b)(36) and is adopted by reference.

"Title V permit" means an operating permit under Title V of the Act.

"Volatile organic compounds" or "VOC" means any compound included in the definition of "volatile organic compounds" found at 40 CFR 51.100(s) as amended through February 8, 2023.

(2) Applicability. The requirements of this rule (PSD program requirements) apply to the construction of any new "major stationary source" as defined in 33.3(1) or any project at an existing major stationary source in an area designated as attainment or unclassifiable under Section 107(d)(1)(A)(ii) or (iii) of the Act.

In addition to the provisions set forth in 567-33.3 (455B) through 567-33.9 (455B), the provisions of 40 CFR Part 51, Appendix W (Guideline on Air Quality Models) as amended through January 17, 2017, are adopted by reference. Provisions set forth in 567-33.3 (455B) through 567-33.9 (455B) that are adopted by reference from 40 CFR 51.166 or 52.21 are as amended through July 19, 2021, unless otherwise noted. The following phrases contained in 40 CFR 51.166 are not adopted by reference: "it shall also provide that," "mechanism whereby," "the plan may provide that," "the plan provides that," "the plan shall provide," and "the plan shall provide that." Additionally, the term "the plan" shall mean "State Implementation Plan" or "SIP."

a. The requirements of 33.3(10) through 33.3(18) apply to the construction of any new major stationary source or the major modification of any existing major stationary source, except as this rule (PSD program requirements) otherwise provides.
b. No new major stationary source or major modification to which the requirements of 33.3(10) through 33.3(18)"e" apply shall begin actual construction without a permit that states that the major stationary source or major modification will meet those requirements.
c. Except as otherwise provided in 33.3(2)"i" and "j," and consistent with the definition of "major modification" contained in 33.3(1), a project is a major modification for a "regulated NSR pollutant" if it causes two types of emissions increases: a "significant emissions increase" and a "net emissions increase" that is "significant." The project is not a major modification if it does not cause a significant emissions increase. If the project causes a significant emissions increase, then the project is a major modification only if it also results in a significant net emissions increase.
d. The procedure for calculating (before beginning actual construction) whether a significant emissions increase (i.e., the first step of the process) will occur depends upon the type of emissions units being modified, according to paragraphs 33.3(2)"e" through "h" of this subrule. The procedure for calculating (before beginning actual construction) whether a significant net emissions increase will occur at the major stationary source (i.e., the second step of the process) is contained in the definition of "net emissions increase." Regardless of any such preconstruction projections, a major modification results if the project causes a significant emissions increase and a significant net emissions increase.
e. Actual-to-projected-actual applicability test for projects that only involve existing emissions units. A significant emissions increase of a regulated NSR pollutant is projected to occur if the sum of the difference between the "projected actual emissions" and the "baseline actual emissions" for each existing emissions unit equals or exceeds the significant amount for that pollutant.
f. Actual-to-potential test for projects that involve only construction of a new emissions unit(s). A significant emissions increase of a regulated NSR pollutant is projected to occur if the sum of the difference between the "potential to emit" from each new emissions unit following completion of the project and the "baseline actual emissions" for a new emissions unit before the project equals or exceeds the significant amount for that pollutant.
g. Reserved.
h. Hybrid test for projects that involve multiple types of emissions units. A significant emissions increase of a regulated NSR pollutant is projected to occur if the sum of the emissions increases for each emissions unit, using the method specified in paragraphs 33.3(2)"e" through "g" of this subrule, as applicable with respect to each emissions unit, for each type of emissions unit equals or exceeds the significant amount for that pollutant.
i. For any major stationary source with a PAL for a regulated NSR pollutant, the major stationary source shall comply with rule requirements under 567-33.9 (455B).
(3) Ambient air increments. The provisions for ambient air increments as specified in 40 CFR 52.21(c) as amended through October 20, 2010, are adopted by reference.
(4) Ambient air ceilings. The provisions for ambient air ceilings as specified in 40 CFR 52.21(d) are adopted by reference.
(5) Restrictions on area classifications. The provisions for restrictions on area classifications as specified in 40 CFR 52.21(e) are adopted by reference.
(6) Exclusions from increment consumption. The provisions by which the SIP may provide for exclusions from increment consumption as specified in 40 CFR 51.166(f) are adopted by reference.
(7) Redesignation. The provisions for redesignation as specified in 40 CFR 52.21(g) are adopted by reference.
(8) Stack heights. The provisions for stack heights as specified in 40 CFR 52.21(h) are adopted by reference.
(9) 1 million Btu per hour input), * 22.1(2)"b," * 22.1(2)"e," * 22.1(2)"r," or * 22.1(2)"s." Records kept on site shall contain the following information: * The specific exemption claimed; and * A description of the associated equipment. The permitting exemptions in this subrule do not relieve the owner or operator of any source from any obligation to comply with any other applicable requirements. a. Fuel-burning equipment for indirect heating and reheating furnaces or cooling units using natural gas or liquefied petroleum gas with a capacity of less than 10 million Btu per hour input per combustion unit. b. Fuel-burning equipment for indirect heating or indirect cooling with a capacity of less than 1 million Btu per hour input per combustion unit when burning untreated wood, untreated seeds or pellets, other untreated vegetative materials, or fuel oil, provided that the equipment and the fuel meet the conditions specified in this paragraph. Used oils meeting the specification from 40 CFR Section 279.11 as amended through July 14, 2006, are acceptable fuels for this exemption. When combusting used oils, the equipment must have a maximum rated capacity of 50,000 Btu or less per hour of heat input or a maximum throughput of 3,600 gallons or less of used oils per year. When combusting untreated wood, untreated seeds or pellets, or other untreated vegetative materials, the equipment must have a maximum rated capacity of 265,600 Btu or less per hour or a maximum throughput of 378,000 pounds or less per year of each fuel or any combination of fuels. Records shall be maintained on site by the owner or operator for at least two calendar years to demonstrate that fuel usage is less than the exemption thresholds. Owners or operators initiating construction, installation, reconstruction, or alteration of equipment (as defined in 567-22.1 (455B)) on or before October 23, 2013, burning coal, used oils, untreated wood, untreated seeds or pellets, or other untreated vegetative materials that qualified for this exemption may continue to claim this exemption after October 23, 2013, without being restricted to the maximum heat input or throughput specified in this paragraph. c. Mobile internal combustion and jet engines, marine vessels and locomotives. d. Equipment used for cultivating land, harvesting crops, or raising livestock other than anaerobic lagoons. This exemption is not applicable if the equipment is used to remove substances from grain that were applied to the grain by another person. This exemption is also not applicable to equipment used by a person to manufacture commercial feed, as defined in Iowa Code section 198.3, that is normally not fed to livestock, owned by the person or another person, in a feedlot, as defined in Iowa Code section 172D.1(6), or a confinement building owned or operated by that person and located in this state. e. Incinerators and pyrolysis cleaning furnaces with a rated refuse burning capacity of less than 25 pounds per hour for which initiation of construction, installation, reconstruction, or alteration (as defined in 567-22.1 (455B)) occurred on or before October 23, 2013. Pyrolysis cleaning furnace exemption is limited to those units that use only natural gas or propane. Salt bath units are not included in this exemption. Incinerators or pyrolysis cleaning furnaces for which initiation of construction, installation, reconstruction, or alteration (as defined in 567-21.1 (455B)) occurred after October 23, 2013, shall not qualify for this exemption. After October 23, 2013, only paint clean-off ovens with a maximum rated capacity of less than 25 pounds per hour that do not combust lead-containing materials shall qualify for this exemption. f. Fugitive dust controls, unless a control efficiency can be assigned to the equipment or control equipment. g. Equipment or control equipment that reduces or eliminates all emission to the atmosphere. An owner or operator electing to use this exemption shall provide to the department the following information: (1) Name and location of the facility; (2) Detailed description of each change being made; (3) Date of the beginning of actual construction and date that operation will begin after the changes are made; (4) Detailed emissions estimates showing:1. The actual and potential emissions, specifically noting increases or decreases, for the project for all regulated pollutants (as defined in 567-24.100 (455B)); and 2. The accumulated emissions increases associated with each change when totaled with other net emissions increases at the facility contemporaneous with the proposed change (occurring within five years before construction of the particular change commences). (5) Documentation of the basis for all emissions estimates; (6) Height of the emission point or stack and height of the highest building within 50 feet; (7) Statement that the provisions of 567-Chapters 31 and 33 do not apply; and (8) Written statement containing certification by a responsible official as defined in 567-24.100 (455B) of truth, accuracy, and completeness that:1. Accumulated emissions with other contemporaneous net increases have not exceeded significant levels, as defined in 40 CFR 52.21(b)(23), and adopted in 567-33.3 (455B); 2. The changes will not prevent the attainment or maintenance of the ambient air quality standards specified in 567-22.11 (455B); 3. Based on information and belief formed after reasonable inquiry, the statements and information in the document are true, accurate, and complete. The conditions listed below also apply to this exemption: * If an owner or operator opts to use this exemption for equipment or a process not yet constructed or modified, the information shall be provided to the department at least 30 days in advance of the beginning of construction on the project. * If an owner or operator opts to use this exemption for equipment or a process that has already been constructed or modified and that does not have a construction permit for that construction or modification, the owner or operator shall not operate until the information listed above is provided to the department. * If a construction permit has been previously issued for the equipment or control equipment, all other conditions of the construction permit remain in effect. * If an owner or operator wishes to obtain credit for emission reductions, an air quality construction permit must be obtained for the reduction prior to the time the reduction is made. h. Equipment (other than anaerobic lagoons) or control equipment that emits odors, unless such equipment or control equipment also emits particulate matter or any other regulated air contaminant (as defined in 567-24.100 (455B)). i. Reserved. j. Residential heaters, cookstoves, or fireplaces that burn untreated wood, untreated seeds or pellets, or other untreated vegetative materials. k. Asbestos demolition and renovation projects subject to 40 CFR Section 61.145 as adopted by reference in 567-subrule 23.1(3). l. The equipment in laboratories used exclusively for nonproduction chemical and physical analyses. Nonproduction analyses means analyses incidental to the production of a good or service and includes analyses conducted for quality assurance or quality control activities or for the assessment of environmental impact. m. Storage tanks with a capacity of less than 19,812 gallons and an annual throughput of less than 200,000 gallons. n. Stack or vents to prevent escape of sewer gases through plumbing traps. Systems that include any industrial waste are not exempt. o. A nonproduction surface coating process that uses only handheld aerosol spray cans. p. Brazing, soldering or welding equipment or portable cutting torches used only for nonproduction activities. q. Cooling and ventilating equipment: comfort air conditioning not designed or used to remove air contaminants generated by, or released from, specific units of equipment. r. An internal combustion engine with a brake horsepower rating of less than 400 measured at the shaft, provided that the owner or operator meets all of the conditions in this paragraph. For the purposes of this exemption, the manufacturer's nameplate rated capacity at full load shall be defined as the brake horsepower output at the shaft. The owner or operator of an engine that was manufactured, ordered, modified or reconstructed after March 18, 2009, may use this exemption only if the owner or operator, prior to installing, modifying or reconstructing the engine, submits to the department a completed registration on forms provided by the department (unless the engine is exempted from registration, as specified in this paragraph or on the registration form) certifying that the engine is in compliance with the following federal regulations:(1) NSPS for stationary compression ignition internal combustion engines ( 40 CFR Part 60, Subpart IIII); or (2) NSPS for stationary spark ignition internal combustion engines (40 CFR Part 60, Subpart JJJJ); and (3) NESHAP for reciprocating internal combustion engines ( 40 CFR Part 63, Subpart ZZZZ). Use of this exemption does not relieve an owner or operator from any obligation to comply with NSPS or NESHAP requirements. An engine that meets the definition of a nonroad engine as specified in 40 CFR Section 1068.30, as amended through January 24, 2023, is exempt from the registration requirements of this paragraph. s. Equipment that is not related to the production of goods or services and used exclusively for academic purposes, located at educational institutions (as defined in Iowa Code section 455B.161). The equipment covered under this exemption is limited to lab hoods, art class equipment, wood shop equipment in classrooms, wood fired pottery kilns, and fuel-burning units with a capacity of less than 1 million Btu per hour fuel capacity. This exemption does not apply to incinerators. t. Any container, storage tank, or vessel that contains a fluid having a maximum true vapor pressure of less than 0.75 psia. "Maximum true vapor pressure" means the equilibrium partial pressure of the material considering: (1) For material stored at ambient temperature, the maximum monthly average temperature as reported by the National Weather Service, or (2) For material stored above or below the ambient temperature, the temperature equal to the highest calendar-month average of the material storage temperature. u. Equipment for carving, cutting, routing, turning, drilling, machining, sawing, surface grinding, sanding, planing, buffing, sandblast cleaning, shot blasting, shot peening, or polishing ceramic artwork, leather, metals (other than beryllium), plastics, concrete, rubber, paper stock, and wood or wood products, where such equipment is either used for nonproduction activities or exhausted inside a building. v. Manually operated equipment, as defined in 567-24.100 (455B), used for buffing, polishing, carving, cutting, drilling, machining, routing, sanding, sawing, scarfing, surface grinding, or turning. w. Small unit exemption. (1) "Small unit" means any emission unit and associated control (if applicable) that emits less than the following: 1. 2 pounds per year of lead and lead compounds expressed as lead (40 pounds per year of lead or lead compounds for equipment for which initiation of construction, installation, reconstruction, or alteration (as defined in 567-22.1 (455B)) occurred on or before October 23, 2013); 2. 5 tons per year of sulfur dioxide; 3. 5 tons per year of nitrogen oxides; 4. 5 tons per year of volatile organic compounds; 5. 5 tons per year of carbon monoxide; 6. 5 tons per year of particulate matter (particulate matter as defined in 40 CFR 51.100(pp), as amended through November 7, 1986); 7. 2.5 tons per year of PM10; 8. 0.52 tons per year of PM2.5 (does not apply to equipment for which initiation of construction, installation, reconstruction, or alteration (as defined in 567-22.1 (455B)) occurred on or before October 23, 2013); and 9. 5 tons per year of hazardous air pollutants (as defined in 567-24.100 (455B)). For the purposes of this exemption, "emission unit" means any part or activity of a stationary source that emits or has the potential to emit any pollutant subject to regulation under the Act. This exemption applies to existing and new or modified "small units." An emission unit that emits hazardous air pollutants (as defined in 567-24.100 (455B)) is not eligible for this exemption if the emission unit is required to be reviewed for compliance with 567-subrule 23.1(3), emission standards for hazardous air pollutants ( 40 CFR Part 61, NESHAP), or 567-subrule 23.1(4), emission standards for hazardous air pollutants for source categories ( 40 CFR Part 63, NESHAP). An emission unit that emits air pollutants that are not regulated air pollutants as defined in 567-24.100 (455B) shall not be eligible to use this exemption. (2) Permit requested. If a construction permit is requested in writing by the owner or operator of a small unit, the director may issue a construction permit for the emission point associated with that emission unit. (3) An owner or operator that utilizes the small unit exemption must maintain on site an "exemption justification document." The exemption justification document must document conformance and compliance with the emission rate limits contained in the definition of "small unit" for the particular emission unit or group of similar emission units obtaining the exemption. Controls that may be part of the exemption justification document include, but are not limited to, the following: emission control devices, such as cyclones, filters, or baghouses; restricted hours of operation or fuel; and raw material or solvent substitution. The exemption justification document for an emission unit or group of similar emission units must be made available for review during normal business hours and for state or EPA on-site inspections and shall be provided to the director or the director's representative upon request. If an exemption justification document does not exist, the applicability of the small unit exemption is voided for that particular emission unit or group of similar emission units. The controls described in the exemption justification document establish a limit on the potential emissions. An exemption justification document shall include the following for each applicable emission unit or group of similar emission units: 1. A narrative description of how the emissions from the emission unit or group of similar emission units were determined and maintained at or below the annual small unit exemption levels. 2. If air pollution control equipment is used, a description of the air pollution control equipment used on the emission unit or group of similar emission units and a statement that the emission unit or group of similar emission units will not be operated without the pollution control equipment operating. 3. If air pollution control equipment is used, the applicant shall maintain a copy of any report of manufacturer's testing results of any emissions test, if available. The department may require a test if it believes that a test is necessary for the exemption claim. 4. A description of all production limits required for the emission unit or group of similar emission units to comply with the exemption levels. 5. Detailed calculations of emissions reflecting the use of any air pollution control devices or production or throughput limitations, or both, for applicable emission unit or group of similar emission units. 6. Records of actual operation that demonstrate that the annual emissions from the emission unit or group of similar emission units were maintained below the exemption levels. 7. Facilities designated as major sources with respect to 567-22.4 (455B) and 567-24.101 (455B), or subject to any applicable federal requirements, shall retain all records demonstrating compliance with the exemption justification document for five years. The record retention requirements supersede any retention conditions of an individual exemption. 8. A certification from the responsible official that the emission unit or group of similar emission units have complied with the exemption levels specified in 22.1(2)"w"(1). (4) Requirement to apply for a construction permit. An owner or operator of a small unit will be required to obtain a construction permit or take the unit out of service if the emission unit exceeds the small unit emission levels. 1. If, during an inspection or other investigation of a facility, the department believes that the emission unit exceeds the emission levels that define a "small unit," then the department will submit calculations and detailed information in a letter to the owner or operator. The owner or operator shall have 60 days to respond with detailed calculations and information to substantiate a claim that the small unit does not exceed the emission levels that define a small unit. 2. If the owner or operator is unable to substantiate a claim to the satisfaction of the department, then the owner or operator that has been using the small unit exemption must cease operation of that small unit or apply for a construction permit for that unit within 90 days after receiving a letter of notice from the department. The emission unit and control equipment may continue operation during this period and the associated initial application review period. 3. If the notification of nonqualification as a small unit is made by the department following the process described above, the owner or operator will be deemed to have constructed an emission unit without the required permit and may be subject to applicable penalties. (5) Required notice for construction or modification of a substantial small unit. The owner or operator shall notify the department in writing at least ten days prior to commencing construction of any new or modified "substantial small unit" as defined in 22.1(2)"w"(6). The owner or operator shall notify the department within 30 days after determining an existing small unit meets the criteria of the "substantial small unit" as defined in 22.1(2)"w"(6). Notification shall include the name of the business, the location where the unit will be installed, and information describing the unit and quantifying its emissions. The owner or operator shall notify the department within 90 days of the end of the calendar year for which the aggregate emissions from substantial small units at the facility have reached any of the cumulative notice thresholds listed below. (6) For the purposes of this paragraph, "substantial small unit" means a small unit that emits more than the following amounts, as documented in the exemption justification document: 1. 2 pounds per year of lead and lead compounds expressed as lead (30 pounds per year of lead or lead compounds for equipment for which initiation of construction, installation, reconstruction, or alteration (as defined in 567-22.1 (455B)) occurred on or before October 23, 2013); 2. 3.75 tons per year of sulfur dioxide; 3. 3.75 tons per year of nitrogen oxides; 4. 3.75 tons per year of volatile organic compounds; 5. 3.75 tons per year of carbon monoxide; 6. 3.75 tons per year of particulate matter (particulate matter as defined in 40 CFR 51.100(pp), as amended through November 7, 1986); 7. 1.875 tons per year of PM10; 8. 0.4 tons per year of PM2.5 (does not apply to equipment for which initiation of construction, installation, reconstruction, or alteration (as defined in 567-22.1 (455B)) occurred on or before October 23, 2013); or 9. 3.75 tons per year of any hazardous air pollutant or 3.75 tons per year of any combination of hazardous air pollutants. An emission unit is a "substantial small unit" only for those substances for which annual emissions exceed the above-indicated amounts.(7) Required notice that a cumulative notice threshold has been reached. Once a "cumulative notice threshold," as defined in 22.1(2)"w"(8), has been reached for any of the listed pollutants, the owner or operator at the facility must apply for air construction permits for all substantial small units for which the cumulative notice threshold for the pollutant(s) in question has been reached. The owner or operator shall have 90 days from the date it determines that the cumulative notice threshold has been reached in which to apply for construction permit(s). The owner or operator shall submit a letter to the department, within five working days of making this determination, establishing the date the owner or operator determined that the cumulative notice threshold had been reached. (8) "Cumulative notice threshold" means the total combined emissions from all substantial small units using the small unit exemption that emit at the facility the following amounts, as documented in the exemption justification document: 1. 0.6 tons per year of lead and lead compounds expressed as lead; 2. 40 tons per year of sulfur dioxide; 3. 40 tons per year of nitrogen oxides; 4. 40 tons per year of volatile organic compounds; 5. 100 tons per year of carbon monoxide; 6. 25 tons per year of particulate matter (particulate matter as defined in 40 CFR 51.100(pp), as amended through November 7, 1986); 7. 15 tons per year of PM10; 8. 10 tons per year of PM2.5 (does not apply to equipment for which initiation of construction, installation, reconstruction, or alteration (as defined in 567-22.1 (455B)) occurred on or before October 23, 2013); or 9. 10 tons per year of any hazardous air pollutant or 25 tons per year of any combination of hazardous air pollutants. x. The following equipment, processes, and activities: (1) Cafeterias, kitchens, and other facilities used for preparing food or beverages primarily for consumption at the source. (2) Consumer use of office equipment and products, not including printers or businesses primarily involved in photographic reproduction. (3) Janitorial services and consumer use of janitorial products. (4) Internal combustion engines used for lawn care, landscaping, and groundskeeping purposes. (5) Laundry activities located at a stationary source that uses washers and dryers to clean, with water solutions of bleach or detergents, or to dry clothing, bedding, and other fabric items used on site. This exemption does not include laundry activities that use dry cleaning equipment or steam boilers. (6) Bathroom vent emissions, including toilet vent emissions. (7) Blacksmith forges. (8) Plant maintenance and upkeep activities and repair or maintenance shop activities (e.g., groundskeeping, general repairs, cleaning, painting, welding, plumbing, retarring roofs, installing insulation, and paving parking lots), provided that these activities are not conducted as part of manufacturing process, are not related to the source's primary business activity, and do not otherwise trigger a permit modification. Cleaning and painting activities qualify if they are not subject to control requirements for volatile organic compounds or hazardous air pollutants as defined in 567-24.100 (455B). (9) Air compressors and vacuum pumps, including hand tools. (10) Batteries and battery charging stations, except at battery manufacturing plants. (11) Equipment used to store, mix, pump, handle or package soaps, detergents, surfactants, waxes, glycerin, vegetable oils, greases, animal fats, sweetener, corn syrup, and aqueous salt or caustic solutions, provided that appropriate lids and covers are utilized and that no organic solvent has been mixed with such materials. (12) Equipment used exclusively to slaughter animals, but not including other equipment at slaughterhouses, such as rendering cookers, boilers, heating plants, incinerators, and electrical power generating equipment. (13) Vents from continuous emissions monitors and other analyzers. (14) Natural gas pressure regulator vents, excluding venting at oil and gas production facilities. (15) Equipment used by surface coating operations that apply the coating by brush, roller, or dipping, except equipment that emits volatile organic compounds or hazardous air pollutants as defined in 567-24.100 (455B). (16) Hydraulic and hydrostatic testing equipment. (17) Environmental chambers not using gases that are hazardous air pollutants as defined in 567-24.100 (455B). (18) Shock chambers, humidity chambers, and solar simulators. (19) Fugitive dust emissions related to movement of passenger vehicles on unpaved road surfaces, provided that the emissions are not counted for applicability purposes and that any fugitive dust control plan or its equivalent is submitted as required by the department. (20) Process water filtration systems and demineralizers, demineralized water tanks, and demineralizer vents. (21) Boiler water treatment operations, not including cooling towers or lime silos. (22) Oxygen scavenging (deaeration) of water. (23) Fire suppression systems. (24) Emergency road flares. (25) Steam vents, safety relief valves, and steam leaks. (26) Steam sterilizers. (27) Application of hot melt adhesives from closed-pot systems using polyolefin compounds, polyamides, acrylics, ethylene vinyl acetate and urethane material when stored and applied at the manufacturer's recommended temperatures. Equipment used to apply hot melt adhesives shall have a safety device that automatically shuts down the equipment if the hot melt temperature exceeds the manufacturer's recommended application temperature. y. Direct-fired equipment burning natural gas, propane, or liquefied propane with a capacity of less than 10 million Btu per hour input, and direct-fired equipment burning fuel oil with a capacity of less than 1 million Btu per hour input, with emissions that are attributable only to the products of combustion. Emissions other than those attributable to the products of combustion shall be accounted for in an enforceable permit condition or shall otherwise be exempt under this subrule. z. Closed refrigeration systems, including storage tanks used in refrigeration systems but excluding any combustion equipment associated with such systems. aa. Pretreatment application processes that use aqueous-based chemistries designed to clean a substrate, provided that the chemical concentrate contains no more than 5 percent organic solvents by weight. This exemption includes pretreatment processes that use aqueous-based cleaners, cleaner-phosphatizers, and phosphate conversion coating chemistries. bb. Indoor-vented powder coating operations with filters or powder recovery systems. cc. Electric curing ovens or curing ovens that run on natural gas or propane with a maximum heat input of less than 10 million Btu per hour and that are used for powder coating operations, provided that the total cured powder usage is less than 75 tons of powder per year at the stationary source. Records shall be maintained on site by the owner or operator for a period of at least two calendar years to demonstrate that cured powder usage is less than the exemption threshold. dd. Each production painting, adhesive or coating unit using an application method other than a spray system and associated cleaning operations that use 1,000 gallons or less of coating and solvents annually, unless the production painting, adhesive or coating unit and associated cleaning operations are subject to work practice, process limits, emissions limits, stack testing, recordkeeping or reporting requirements under 567-subrule 23.1(2), 23.1(3) or 23.1(4). Records shall be maintained on site by the owner or operator for a period of at least two calendar years to demonstrate that paint, adhesive, or solvent usage is at or below the exemption threshold. ee. Any production surface coating activity that uses only nonrefillable handheld aerosol cans, where the total volatile organic compound emissions from all these activities at a stationary source do not exceed 5.0 tons per year. ff. Production welding. (1) Consumable electrode. 1. Welding operations for which initiation of construction, installation, reconstruction, or alteration (as defined in 567-22.1 (455B)) occurred on or before October 23, 2013, using a consumable electrode, provided that the consumable electrode used falls within American Welding Society specification A5.18/A5.18M for Gas Metal Arc Welding (GMAW), A5.1 or A5.5 for Shielded Metal Arc Welding (SMAW), and A5.20 for Flux Core Arc Welding (FCAW), and provided that the quantity of all electrodes used at the stationary source of the acceptable specifications is below 200,000 pounds per year for GMAW and 28,000 pounds per year for SMAW or FCAW. Records that identify the type and annual amount of welding electrode used shall be maintained on site by the owner or operator for a period of at least two calendar years. For stationary sources where electrode usage exceeds these levels, the welding activity at the stationary source may be exempted if the amount of electrode used (Y) is less than: Y = the greater of 1380x - 19,200 or 200,000 for GMAW, or Y = the greater of 187x - 2,600 or 28,000 for SMAW or FCAW Where "x" is the minimum distance to the property line in feet and "Y" is the annual electrode usage in pounds per year. If the stationary source has welding processes that fit into both of the specified exemptions, the most stringent limits must be applied. 2. Welding operations for which initiation of construction, installation, reconstruction, or alteration (as defined in 567-22.1 (455B)) occurred after October 23, 2013, using a consumable electrode, provided that the consumable electrode used falls within American Welding Society specification A5.18/A5.18M for Gas Metal Arc Welding (GMAW), A5.1 or A5.5 for Shielded Metal Arc Welding (SMAW), and A5.20 for Flux Core Arc Welding (FCAW), and provided that the quantity of all electrodes used at the stationary source of the acceptable specifications is below 12,500 pounds per year for GMAW and 1,600 pounds per year for SMAW or FCAW. Records that identify the type and annual amount of welding electrode used shall be maintained on site by the owner or operator for a period of at least two calendar years. For stationary sources where electrode usage exceeds these levels, the welding activity at the stationary source may be exempted if the amount of electrode used (Y) is less than: Y = the greater of 84x - 1,200 or 12,500 for GMAW, or Y = the greater of 11x - 160 or 1,600 for SMAW or FCAW Where "x" is the minimum distance to the property line in feet and "Y" is the annual electrode usage in pounds per year. If the stationary source has welding processes that fit into both of the specified exemptions, the most stringent limits must be applied. (2) Resistance welding, submerged arc welding, or arc welding that does not use a consumable electrode, provided that the base metals do not include stainless steel, alloys of lead, alloys of arsenic, or alloys of beryllium and provided that the base metals are uncoated, excluding manufacturing process lubricants. gg. Electric hand soldering, wave soldering, and electric solder paste reflow ovens for which initiation of construction, installation, reconstruction, or alteration (as defined in 567-22.1 (455B)) occurred on or before October 23, 2013. Electric hand soldering, wave soldering, and electric solder paste reflow ovens for which initiation of construction, installation, reconstruction, or alteration (as defined in 567-2.1 (455B)) occurred after October 23, 2013, shall be limited to 37,000 pounds or less per year of lead-containing solder. Records shall be maintained on site by the owner or operator for at least two calendar years to demonstrate that use of lead-containing solder is less than the exemption thresholds. hh. Pressurized piping and storage systems for natural gas, propane, liquefied petroleum gas (LPG), and refrigerants, where emissions could only result from an upset condition. ii. Emissions from the storage and mixing of paints and solvents associated with the painting operations, provided that the emissions from the storage and mixing are accounted for in an enforceable permit condition or are otherwise exempt. jj. Product labeling using laser and ink-jet printers with target distances less than or equal to six inches and an annual material throughput of less than 1,000 gallons per year as calculated on a stationary sourcewide basis. kk. Equipment related to research and development activities at a stationary source, provided that: (1) Actual emissions from all research and development activities at the stationary source based on a 12-month rolling total are less than the following levels: 1. 2 pounds per year of lead and lead compounds expressed as lead (40 pounds per year for research and development activities that commenced on or before October 23, 2013); 2. 5 tons per year of sulfur dioxide; 3. 5 tons per year of nitrogen oxides; 4. 5 tons per year of volatile organic compounds; 5. 5 tons per year of carbon monoxide; 6. 5 tons per year of particulate matter (particulate matter as defined in 40 CFR 51.100(pp) as amended through November 7, 1986); 7. 2.5 tons per year of PM10; 8. 0.52 tons per year of PM2.5 (does not apply to research and development activities that commenced on or before October 23, 2013); and 9. 5 tons per year of hazardous pollutants (as defined in 567-24.100 (455B)); and (2) The owner or operator maintains records of actual operations demonstrating that the annual emissions from all research and development activities conducted under this exemption are below the levels listed in 22.1(2)"kk"(1). These records shall: 1. Include a list of equipment that is included under the exemption; 2. Include records of actual operation and detailed calculations of actual annual emissions, reflecting the use of any control equipment and demonstrating that the emissions are below the levels specified in the exemption; 3. Include, if air pollution equipment is used in the calculation of emissions, a copy of any report of manufacturer's testing, if available. The department may require a test if it believes that a test is necessary for the exemption claim; and 4. Be maintained on site for a minimum of two years, be made available for review during normal business hours and for state and EPA on-site inspections, and be provided to the director or the director's designee upon request. Facilities designated as major sources pursuant to 567-22.4 (455B) and 567-24.101 (455B), or subject to any applicable federal requirements, shall retain all records demonstrating compliance with this exemption for five years. (3) An owner or operator using this exemption obtains a construction permit or ceases operation of equipment if operation of the equipment would cause the emission levels listed in this exemption to be exceeded. For the purposes of this exemption, "research and development activities" shall be defined as activities: 1. That are operated under the close supervision of technically trained personnel; 2. That are conducted for the primary purpose of theoretical research or research and development into new or improved processes and products; 3. That do not manufacture more than de minimus amounts of commercial products; and 4. That do not contribute to the manufacture of commercial products by collocated sources in more than a de minimus manner. ll. A regional collection center (RCC), as defined in 567-Chapter 211, involved in the processing of permitted hazardous materials from households and conditionally exempt small quantity generators (CESQG), not to exceed 1,200,000 pounds of VOC-containing material in a 12-month rolling period. Latex paint drying may not exceed 120,000 pounds per year on a 12-month rolling total. Other nonprocessing emission units (e.g., standby generators and waste oil heaters) shall not be eligible to use this exemption. mm. Cold solvent cleaning machines that are not in-line cleaning machines, where the maximum vapor pressure of the solvents used shall not exceed 0.7 kPa (5 mmHg or 0.1 psi) at 20°C (68°F). The machine must be equipped with a tightly fitted cover or lid that shall be closed at all times except during parts entry and removal. This exemption cannot be used for cold solvent cleaning machines that use solvent containing methylene chloride (CAS # 75-09-2), perchloroethylene (CAS # 127-18-4), trichloroethylene (CAS # 79-01-6), 1,1,1-trichloroethane (CAS # 71-55-6), carbon tetrachloride (CAS # 56-23-5) or chloroform (CAS # 67-66-3), or any combination of these halogenated HAP solvents in a total concentration greater than 5 percent by weight. nn. Emissions from mobile over-the-road trucks, and mobile agricultural and construction internal combustion engines that are operated only for repair or maintenance purposes at equipment repair shops or equipment dealerships, and only when the repair shops or equipment dealerships are not major sources as defined in 567-24.100 (455B). oo. A nonroad diesel fueled engine, as "nonroad engine" is defined in 40 CFR Section 1068.30 as amended through January 24, 2023, with a brake horsepower rating of less than 1,100 at full load measured at the shaft, used to conduct periodic testing and maintenance on natural gas pipelines. For the purposes of this exemption, the manufacturer's nameplate rating shall be defined as the brake horsepower output at the shaft at full load. (1) To qualify for the exemption, the engine must:1. Be used for periodic testing and maintenance on natural gas pipelines outside the compressor station, which shall not exceed 330 hours in any 12-month consecutive period at a single location; or 2. Be used for periodic testing and maintenance on natural gas pipelines within the compressor station, which shall not exceed 330 hours in any 12-month consecutive period. (2) The owner or operator shall maintain a monthly record of the number of hours the engine operated and a record of the rolling 12-month total of the number of hours the engine operated for each location outside the compressor station and within the compressor station. These records shall be maintained for two years. Records shall be made available to the department upon request. (3) This exemption shall not apply to the replacement or substitution of engines for backup power generation at a pipeline compressor station. (3) Construction permits. The owner or operator of a new or modified stationary source shall apply for a construction permit. Construction permit applications, including the information referenced above and in 567-22.1 (455B) through 567-22.10 (455B), shall be submitted in the electronic format specified by the department, if electronic submittal is provided. The owner or operator of any new or modified industrial anaerobic lagoon shall apply for a construction permit as specified in this subrule and as provided in 567-Chapter 22. The owner or operator of a new or modified anaerobic lagoon for an animal feeding operation shall apply for a construction permit as provided in 567-Chapter 65. a. Regulatory applicability determinations. If requested in writing, the director will review the design concepts of equipment and associated control equipment prior to application for a construction permit. The purpose of the review would be to determine the acceptability of the location of the equipment. If the review is requested, the requester shall supply the following information and submit a fee as required in 567-Chapter 30:(1) Preliminary plans and specifications of equipment and related control equipment. (2) The exact site location and a plot plan of the immediate area, including the distance to and height of nearby buildings and the estimated location and elevation of the emission points. (3) The estimated emission rates of any air contaminants that are to be considered. (4) The estimated exhaust gas temperature, velocity at the point of discharge, and stack diameter at the point of discharge. (5) An estimate of when construction would begin and when construction would be completed. b. Construction permit applications. Each application for a construction permit shall be submitted to the department. Final plans and specifications for the proposed equipment or related control equipment shall be submitted with the application for a permit and shall be prepared by or under the direct supervision of a professional engineer licensed in the state of Iowa in conformance with Iowa Code section 542B.1, or consistent with the provisions of Iowa Code section 542B.26 for any full-time employee of any corporation while the employee is doing work for that corporation. The application for a permit to construct shall include the following information: (1) A description of the equipment or control equipment covered by the application; (2) A scaled plot plan, including the distance and height of nearby buildings, and the location and elevation of existing and proposed emission points; (3) The composition of the effluent stream, both before and after any control equipment with estimates of emission rates, concentration, volume and temperature; (4) The physical and chemical characteristics of the air contaminants; (5) The proposed dates and description of any tests to be made by the owner or operator of the completed installation to verify compliance with applicable emission limits or standards of performance; (6) Information pertaining to sampling port locations, scaffolding, power sources for operation of appropriate sampling instruments, and pertinent allied facilities for making tests to ascertain compliance; (7) Any additional information deemed necessary by the department to determine compliance with or applicability of 567-22.4 (455B), 567-22.5 (455B), 567-31.3 (455B) and 567-33.3 (455B); (8) Reserved. (9) A signed statement that ensures the applicant's legal entitlement to install and operate equipment covered by the permit application on the property identified in the permit application. A signed statement shall not be required for rock crushers, portable concrete or asphalt equipment used in conjunction with specific identified construction projects that are intended to be located at a site only for the duration of the specific, identified construction project; and (10) Application fee. 1. The owner or operator shall submit a fee as required in 567-Chapter 30 to obtain a permit under 22.1(1), 567-22.4 (455B), 567-22.5 (455B), 567-22.8 (455B), 567-22.10 (455B), 567-Chapter 31 or 567-Chapter 33; 2. For application submittals from a minor source as defined in 567-Chapter 30, the department shall not initiate review and processing of a permit application submittal until all required application fees have been paid to the department; and (11) Quantity of greenhouse gas emissions for all applications for projects that will or do have greenhouse gas emissions. For all applications for projects that will not or do not have greenhouse gas emissions, the applicant shall indicate in the application that no greenhouse gases will be emitted and the applicant will not be required to file an inventory of greenhouse gases with that application, unless requested by the department. c. Application requirements for anaerobic lagoons. The application for a permit to construct an anaerobic lagoon shall include the following information: (1) The source of the water being discharged to the lagoon; (2) A plot plan, including distances to nearby residences or occupied buildings, local land use zoning maps of the vicinity, and a general description of the topography in the vicinity of the lagoon; (3) In the case of an animal feeding operation, the information required in 567-Chapter 65; (4) In the case of an industrial source, a chemical description of the waste being discharged to the lagoon; (5) A report of sulfate analyses conducted on the water to be used for any purpose in a livestock operation proposing to use an anaerobic lagoon. The report shall be prepared by using standard methods as defined in 567-60.2 (455B); (6) A description of available water supplies to prove that adequate water is available for dilution; (7) In the case of an animal feeding operation, a waste management plan describing the method of waste collection and disposal and the land to be used for disposal. Evidence that the waste disposal equipment is of sufficient size to dispose of the wastes within a 20-day period per year shall also be provided; (8) Any additional information needed by the department to determine compliance with these rules." scope="agency:567:title:II">Exemptions. The provisions for allowing 1 million Btu per hour input), * 22.1(2)"b," * 22.1(2)"e," * 22.1(2)"r," or * 22.1(2)"s." Records kept on site shall contain the following information: * The specific exemption claimed; and * A description of the associated equipment. The permitting exemptions in this subrule do not relieve the owner or operator of any source from any obligation to comply with any other applicable requirements. a. Fuel-burning equipment for indirect heating and reheating furnaces or cooling units using natural gas or liquefied petroleum gas with a capacity of less than 10 million Btu per hour input per combustion unit. b. Fuel-burning equipment for indirect heating or indirect cooling with a capacity of less than 1 million Btu per hour input per combustion unit when burning untreated wood, untreated seeds or pellets, other untreated vegetative materials, or fuel oil, provided that the equipment and the fuel meet the conditions specified in this paragraph. Used oils meeting the specification from 40 CFR Section 279.11 as amended through July 14, 2006, are acceptable fuels for this exemption. When combusting used oils, the equipment must have a maximum rated capacity of 50,000 Btu or less per hour of heat input or a maximum throughput of 3,600 gallons or less of used oils per year. When combusting untreated wood, untreated seeds or pellets, or other untreated vegetative materials, the equipment must have a maximum rated capacity of 265,600 Btu or less per hour or a maximum throughput of 378,000 pounds or less per year of each fuel or any combination of fuels. Records shall be maintained on site by the owner or operator for at least two calendar years to demonstrate that fuel usage is less than the exemption thresholds. Owners or operators initiating construction, installation, reconstruction, or alteration of equipment (as defined in 567-22.1 (455B)) on or before October 23, 2013, burning coal, used oils, untreated wood, untreated seeds or pellets, or other untreated vegetative materials that qualified for this exemption may continue to claim this exemption after October 23, 2013, without being restricted to the maximum heat input or throughput specified in this paragraph. c. Mobile internal combustion and jet engines, marine vessels and locomotives. d. Equipment used for cultivating land, harvesting crops, or raising livestock other than anaerobic lagoons. This exemption is not applicable if the equipment is used to remove substances from grain that were applied to the grain by another person. This exemption is also not applicable to equipment used by a person to manufacture commercial feed, as defined in Iowa Code section 198.3, that is normally not fed to livestock, owned by the person or another person, in a feedlot, as defined in Iowa Code section 172D.1(6), or a confinement building owned or operated by that person and located in this state. e. Incinerators and pyrolysis cleaning furnaces with a rated refuse burning capacity of less than 25 pounds per hour for which initiation of construction, installation, reconstruction, or alteration (as defined in 567-22.1 (455B)) occurred on or before October 23, 2013. Pyrolysis cleaning furnace exemption is limited to those units that use only natural gas or propane. Salt bath units are not included in this exemption. Incinerators or pyrolysis cleaning furnaces for which initiation of construction, installation, reconstruction, or alteration (as defined in 567-21.1 (455B)) occurred after October 23, 2013, shall not qualify for this exemption. After October 23, 2013, only paint clean-off ovens with a maximum rated capacity of less than 25 pounds per hour that do not combust lead-containing materials shall qualify for this exemption. f. Fugitive dust controls, unless a control efficiency can be assigned to the equipment or control equipment. g. Equipment or control equipment that reduces or eliminates all emission to the atmosphere. An owner or operator electing to use this exemption shall provide to the department the following information: (1) Name and location of the facility; (2) Detailed description of each change being made; (3) Date of the beginning of actual construction and date that operation will begin after the changes are made; (4) Detailed emissions estimates showing:1. The actual and potential emissions, specifically noting increases or decreases, for the project for all regulated pollutants (as defined in 567-24.100 (455B)); and 2. The accumulated emissions increases associated with each change when totaled with other net emissions increases at the facility contemporaneous with the proposed change (occurring within five years before construction of the particular change commences). (5) Documentation of the basis for all emissions estimates; (6) Height of the emission point or stack and height of the highest building within 50 feet; (7) Statement that the provisions of 567-Chapters 31 and 33 do not apply; and (8) Written statement containing certification by a responsible official as defined in 567-24.100 (455B) of truth, accuracy, and completeness that:1. Accumulated emissions with other contemporaneous net increases have not exceeded significant levels, as defined in 40 CFR 52.21(b)(23), and adopted in 567-33.3 (455B); 2. The changes will not prevent the attainment or maintenance of the ambient air quality standards specified in 567-22.11 (455B); 3. Based on information and belief formed after reasonable inquiry, the statements and information in the document are true, accurate, and complete. The conditions listed below also apply to this exemption: * If an owner or operator opts to use this exemption for equipment or a process not yet constructed or modified, the information shall be provided to the department at least 30 days in advance of the beginning of construction on the project. * If an owner or operator opts to use this exemption for equipment or a process that has already been constructed or modified and that does not have a construction permit for that construction or modification, the owner or operator shall not operate until the information listed above is provided to the department. * If a construction permit has been previously issued for the equipment or control equipment, all other conditions of the construction permit remain in effect. * If an owner or operator wishes to obtain credit for emission reductions, an air quality construction permit must be obtained for the reduction prior to the time the reduction is made. h. Equipment (other than anaerobic lagoons) or control equipment that emits odors, unless such equipment or control equipment also emits particulate matter or any other regulated air contaminant (as defined in 567-24.100 (455B)). i. Reserved. j. Residential heaters, cookstoves, or fireplaces that burn untreated wood, untreated seeds or pellets, or other untreated vegetative materials. k. Asbestos demolition and renovation projects subject to 40 CFR Section 61.145 as adopted by reference in 567-subrule 23.1(3). l. The equipment in laboratories used exclusively for nonproduction chemical and physical analyses. Nonproduction analyses means analyses incidental to the production of a good or service and includes analyses conducted for quality assurance or quality control activities or for the assessment of environmental impact. m. Storage tanks with a capacity of less than 19,812 gallons and an annual throughput of less than 200,000 gallons. n. Stack or vents to prevent escape of sewer gases through plumbing traps. Systems that include any industrial waste are not exempt. o. A nonproduction surface coating process that uses only handheld aerosol spray cans. p. Brazing, soldering or welding equipment or portable cutting torches used only for nonproduction activities. q. Cooling and ventilating equipment: comfort air conditioning not designed or used to remove air contaminants generated by, or released from, specific units of equipment. r. An internal combustion engine with a brake horsepower rating of less than 400 measured at the shaft, provided that the owner or operator meets all of the conditions in this paragraph. For the purposes of this exemption, the manufacturer's nameplate rated capacity at full load shall be defined as the brake horsepower output at the shaft. The owner or operator of an engine that was manufactured, ordered, modified or reconstructed after March 18, 2009, may use this exemption only if the owner or operator, prior to installing, modifying or reconstructing the engine, submits to the department a completed registration on forms provided by the department (unless the engine is exempted from registration, as specified in this paragraph or on the registration form) certifying that the engine is in compliance with the following federal regulations:(1) NSPS for stationary compression ignition internal combustion engines ( 40 CFR Part 60, Subpart IIII); or (2) NSPS for stationary spark ignition internal combustion engines (40 CFR Part 60, Subpart JJJJ); and (3) NESHAP for reciprocating internal combustion engines ( 40 CFR Part 63, Subpart ZZZZ). Use of this exemption does not relieve an owner or operator from any obligation to comply with NSPS or NESHAP requirements. An engine that meets the definition of a nonroad engine as specified in 40 CFR Section 1068.30, as amended through January 24, 2023, is exempt from the registration requirements of this paragraph. s. Equipment that is not related to the production of goods or services and used exclusively for academic purposes, located at educational institutions (as defined in Iowa Code section 455B.161). The equipment covered under this exemption is limited to lab hoods, art class equipment, wood shop equipment in classrooms, wood fired pottery kilns, and fuel-burning units with a capacity of less than 1 million Btu per hour fuel capacity. This exemption does not apply to incinerators. t. Any container, storage tank, or vessel that contains a fluid having a maximum true vapor pressure of less than 0.75 psia. "Maximum true vapor pressure" means the equilibrium partial pressure of the material considering: (1) For material stored at ambient temperature, the maximum monthly average temperature as reported by the National Weather Service, or (2) For material stored above or below the ambient temperature, the temperature equal to the highest calendar-month average of the material storage temperature. u. Equipment for carving, cutting, routing, turning, drilling, machining, sawing, surface grinding, sanding, planing, buffing, sandblast cleaning, shot blasting, shot peening, or polishing ceramic artwork, leather, metals (other than beryllium), plastics, concrete, rubber, paper stock, and wood or wood products, where such equipment is either used for nonproduction activities or exhausted inside a building. v. Manually operated equipment, as defined in 567-24.100 (455B), used for buffing, polishing, carving, cutting, drilling, machining, routing, sanding, sawing, scarfing, surface grinding, or turning. w. Small unit exemption. (1) "Small unit" means any emission unit and associated control (if applicable) that emits less than the following: 1. 2 pounds per year of lead and lead compounds expressed as lead (40 pounds per year of lead or lead compounds for equipment for which initiation of construction, installation, reconstruction, or alteration (as defined in 567-22.1 (455B)) occurred on or before October 23, 2013); 2. 5 tons per year of sulfur dioxide; 3. 5 tons per year of nitrogen oxides; 4. 5 tons per year of volatile organic compounds; 5. 5 tons per year of carbon monoxide; 6. 5 tons per year of particulate matter (particulate matter as defined in 40 CFR 51.100(pp), as amended through November 7, 1986); 7. 2.5 tons per year of PM10; 8. 0.52 tons per year of PM2.5 (does not apply to equipment for which initiation of construction, installation, reconstruction, or alteration (as defined in 567-22.1 (455B)) occurred on or before October 23, 2013); and 9. 5 tons per year of hazardous air pollutants (as defined in 567-24.100 (455B)). For the purposes of this exemption, "emission unit" means any part or activity of a stationary source that emits or has the potential to emit any pollutant subject to regulation under the Act. This exemption applies to existing and new or modified "small units." An emission unit that emits hazardous air pollutants (as defined in 567-24.100 (455B)) is not eligible for this exemption if the emission unit is required to be reviewed for compliance with 567-subrule 23.1(3), emission standards for hazardous air pollutants ( 40 CFR Part 61, NESHAP), or 567-subrule 23.1(4), emission standards for hazardous air pollutants for source categories ( 40 CFR Part 63, NESHAP). An emission unit that emits air pollutants that are not regulated air pollutants as defined in 567-24.100 (455B) shall not be eligible to use this exemption. (2) Permit requested. If a construction permit is requested in writing by the owner or operator of a small unit, the director may issue a construction permit for the emission point associated with that emission unit. (3) An owner or operator that utilizes the small unit exemption must maintain on site an "exemption justification document." The exemption justification document must document conformance and compliance with the emission rate limits contained in the definition of "small unit" for the particular emission unit or group of similar emission units obtaining the exemption. Controls that may be part of the exemption justification document include, but are not limited to, the following: emission control devices, such as cyclones, filters, or baghouses; restricted hours of operation or fuel; and raw material or solvent substitution. The exemption justification document for an emission unit or group of similar emission units must be made available for review during normal business hours and for state or EPA on-site inspections and shall be provided to the director or the director's representative upon request. If an exemption justification document does not exist, the applicability of the small unit exemption is voided for that particular emission unit or group of similar emission units. The controls described in the exemption justification document establish a limit on the potential emissions. An exemption justification document shall include the following for each applicable emission unit or group of similar emission units: 1. A narrative description of how the emissions from the emission unit or group of similar emission units were determined and maintained at or below the annual small unit exemption levels. 2. If air pollution control equipment is used, a description of the air pollution control equipment used on the emission unit or group of similar emission units and a statement that the emission unit or group of similar emission units will not be operated without the pollution control equipment operating. 3. If air pollution control equipment is used, the applicant shall maintain a copy of any report of manufacturer's testing results of any emissions test, if available. The department may require a test if it believes that a test is necessary for the exemption claim. 4. A description of all production limits required for the emission unit or group of similar emission units to comply with the exemption levels. 5. Detailed calculations of emissions reflecting the use of any air pollution control devices or production or throughput limitations, or both, for applicable emission unit or group of similar emission units. 6. Records of actual operation that demonstrate that the annual emissions from the emission unit or group of similar emission units were maintained below the exemption levels. 7. Facilities designated as major sources with respect to 567-22.4 (455B) and 567-24.101 (455B), or subject to any applicable federal requirements, shall retain all records demonstrating compliance with the exemption justification document for five years. The record retention requirements supersede any retention conditions of an individual exemption. 8. A certification from the responsible official that the emission unit or group of similar emission units have complied with the exemption levels specified in 22.1(2)"w"(1). (4) Requirement to apply for a construction permit. An owner or operator of a small unit will be required to obtain a construction permit or take the unit out of service if the emission unit exceeds the small unit emission levels. 1. If, during an inspection or other investigation of a facility, the department believes that the emission unit exceeds the emission levels that define a "small unit," then the department will submit calculations and detailed information in a letter to the owner or operator. The owner or operator shall have 60 days to respond with detailed calculations and information to substantiate a claim that the small unit does not exceed the emission levels that define a small unit. 2. If the owner or operator is unable to substantiate a claim to the satisfaction of the department, then the owner or operator that has been using the small unit exemption must cease operation of that small unit or apply for a construction permit for that unit within 90 days after receiving a letter of notice from the department. The emission unit and control equipment may continue operation during this period and the associated initial application review period. 3. If the notification of nonqualification as a small unit is made by the department following the process described above, the owner or operator will be deemed to have constructed an emission unit without the required permit and may be subject to applicable penalties. (5) Required notice for construction or modification of a substantial small unit. The owner or operator shall notify the department in writing at least ten days prior to commencing construction of any new or modified "substantial small unit" as defined in 22.1(2)"w"(6). The owner or operator shall notify the department within 30 days after determining an existing small unit meets the criteria of the "substantial small unit" as defined in 22.1(2)"w"(6). Notification shall include the name of the business, the location where the unit will be installed, and information describing the unit and quantifying its emissions. The owner or operator shall notify the department within 90 days of the end of the calendar year for which the aggregate emissions from substantial small units at the facility have reached any of the cumulative notice thresholds listed below. (6) For the purposes of this paragraph, "substantial small unit" means a small unit that emits more than the following amounts, as documented in the exemption justification document: 1. 2 pounds per year of lead and lead compounds expressed as lead (30 pounds per year of lead or lead compounds for equipment for which initiation of construction, installation, reconstruction, or alteration (as defined in 567-22.1 (455B)) occurred on or before October 23, 2013); 2. 3.75 tons per year of sulfur dioxide; 3. 3.75 tons per year of nitrogen oxides; 4. 3.75 tons per year of volatile organic compounds; 5. 3.75 tons per year of carbon monoxide; 6. 3.75 tons per year of particulate matter (particulate matter as defined in 40 CFR 51.100(pp), as amended through November 7, 1986); 7. 1.875 tons per year of PM10; 8. 0.4 tons per year of PM2.5 (does not apply to equipment for which initiation of construction, installation, reconstruction, or alteration (as defined in 567-22.1 (455B)) occurred on or before October 23, 2013); or 9. 3.75 tons per year of any hazardous air pollutant or 3.75 tons per year of any combination of hazardous air pollutants. An emission unit is a "substantial small unit" only for those substances for which annual emissions exceed the above-indicated amounts.(7) Required notice that a cumulative notice threshold has been reached. Once a "cumulative notice threshold," as defined in 22.1(2)"w"(8), has been reached for any of the listed pollutants, the owner or operator at the facility must apply for air construction permits for all substantial small units for which the cumulative notice threshold for the pollutant(s) in question has been reached. The owner or operator shall have 90 days from the date it determines that the cumulative notice threshold has been reached in which to apply for construction permit(s). The owner or operator shall submit a letter to the department, within five working days of making this determination, establishing the date the owner or operator determined that the cumulative notice threshold had been reached. (8) "Cumulative notice threshold" means the total combined emissions from all substantial small units using the small unit exemption that emit at the facility the following amounts, as documented in the exemption justification document: 1. 0.6 tons per year of lead and lead compounds expressed as lead; 2. 40 tons per year of sulfur dioxide; 3. 40 tons per year of nitrogen oxides; 4. 40 tons per year of volatile organic compounds; 5. 100 tons per year of carbon monoxide; 6. 25 tons per year of particulate matter (particulate matter as defined in 40 CFR 51.100(pp), as amended through November 7, 1986); 7. 15 tons per year of PM10; 8. 10 tons per year of PM2.5 (does not apply to equipment for which initiation of construction, installation, reconstruction, or alteration (as defined in 567-22.1 (455B)) occurred on or before October 23, 2013); or 9. 10 tons per year of any hazardous air pollutant or 25 tons per year of any combination of hazardous air pollutants. x. The following equipment, processes, and activities: (1) Cafeterias, kitchens, and other facilities used for preparing food or beverages primarily for consumption at the source. (2) Consumer use of office equipment and products, not including printers or businesses primarily involved in photographic reproduction. (3) Janitorial services and consumer use of janitorial products. (4) Internal combustion engines used for lawn care, landscaping, and groundskeeping purposes. (5) Laundry activities located at a stationary source that uses washers and dryers to clean, with water solutions of bleach or detergents, or to dry clothing, bedding, and other fabric items used on site. This exemption does not include laundry activities that use dry cleaning equipment or steam boilers. (6) Bathroom vent emissions, including toilet vent emissions. (7) Blacksmith forges. (8) Plant maintenance and upkeep activities and repair or maintenance shop activities (e.g., groundskeeping, general repairs, cleaning, painting, welding, plumbing, retarring roofs, installing insulation, and paving parking lots), provided that these activities are not conducted as part of manufacturing process, are not related to the source's primary business activity, and do not otherwise trigger a permit modification. Cleaning and painting activities qualify if they are not subject to control requirements for volatile organic compounds or hazardous air pollutants as defined in 567-24.100 (455B). (9) Air compressors and vacuum pumps, including hand tools. (10) Batteries and battery charging stations, except at battery manufacturing plants. (11) Equipment used to store, mix, pump, handle or package soaps, detergents, surfactants, waxes, glycerin, vegetable oils, greases, animal fats, sweetener, corn syrup, and aqueous salt or caustic solutions, provided that appropriate lids and covers are utilized and that no organic solvent has been mixed with such materials. (12) Equipment used exclusively to slaughter animals, but not including other equipment at slaughterhouses, such as rendering cookers, boilers, heating plants, incinerators, and electrical power generating equipment. (13) Vents from continuous emissions monitors and other analyzers. (14) Natural gas pressure regulator vents, excluding venting at oil and gas production facilities. (15) Equipment used by surface coating operations that apply the coating by brush, roller, or dipping, except equipment that emits volatile organic compounds or hazardous air pollutants as defined in 567-24.100 (455B). (16) Hydraulic and hydrostatic testing equipment. (17) Environmental chambers not using gases that are hazardous air pollutants as defined in 567-24.100 (455B). (18) Shock chambers, humidity chambers, and solar simulators. (19) Fugitive dust emissions related to movement of passenger vehicles on unpaved road surfaces, provided that the emissions are not counted for applicability purposes and that any fugitive dust control plan or its equivalent is submitted as required by the department. (20) Process water filtration systems and demineralizers, demineralized water tanks, and demineralizer vents. (21) Boiler water treatment operations, not including cooling towers or lime silos. (22) Oxygen scavenging (deaeration) of water. (23) Fire suppression systems. (24) Emergency road flares. (25) Steam vents, safety relief valves, and steam leaks. (26) Steam sterilizers. (27) Application of hot melt adhesives from closed-pot systems using polyolefin compounds, polyamides, acrylics, ethylene vinyl acetate and urethane material when stored and applied at the manufacturer's recommended temperatures. Equipment used to apply hot melt adhesives shall have a safety device that automatically shuts down the equipment if the hot melt temperature exceeds the manufacturer's recommended application temperature. y. Direct-fired equipment burning natural gas, propane, or liquefied propane with a capacity of less than 10 million Btu per hour input, and direct-fired equipment burning fuel oil with a capacity of less than 1 million Btu per hour input, with emissions that are attributable only to the products of combustion. Emissions other than those attributable to the products of combustion shall be accounted for in an enforceable permit condition or shall otherwise be exempt under this subrule. z. Closed refrigeration systems, including storage tanks used in refrigeration systems but excluding any combustion equipment associated with such systems. aa. Pretreatment application processes that use aqueous-based chemistries designed to clean a substrate, provided that the chemical concentrate contains no more than 5 percent organic solvents by weight. This exemption includes pretreatment processes that use aqueous-based cleaners, cleaner-phosphatizers, and phosphate conversion coating chemistries. bb. Indoor-vented powder coating operations with filters or powder recovery systems. cc. Electric curing ovens or curing ovens that run on natural gas or propane with a maximum heat input of less than 10 million Btu per hour and that are used for powder coating operations, provided that the total cured powder usage is less than 75 tons of powder per year at the stationary source. Records shall be maintained on site by the owner or operator for a period of at least two calendar years to demonstrate that cured powder usage is less than the exemption threshold. dd. Each production painting, adhesive or coating unit using an application method other than a spray system and associated cleaning operations that use 1,000 gallons or less of coating and solvents annually, unless the production painting, adhesive or coating unit and associated cleaning operations are subject to work practice, process limits, emissions limits, stack testing, recordkeeping or reporting requirements under 567-subrule 23.1(2), 23.1(3) or 23.1(4). Records shall be maintained on site by the owner or operator for a period of at least two calendar years to demonstrate that paint, adhesive, or solvent usage is at or below the exemption threshold. ee. Any production surface coating activity that uses only nonrefillable handheld aerosol cans, where the total volatile organic compound emissions from all these activities at a stationary source do not exceed 5.0 tons per year. ff. Production welding. (1) Consumable electrode. 1. Welding operations for which initiation of construction, installation, reconstruction, or alteration (as defined in 567-22.1 (455B)) occurred on or before October 23, 2013, using a consumable electrode, provided that the consumable electrode used falls within American Welding Society specification A5.18/A5.18M for Gas Metal Arc Welding (GMAW), A5.1 or A5.5 for Shielded Metal Arc Welding (SMAW), and A5.20 for Flux Core Arc Welding (FCAW), and provided that the quantity of all electrodes used at the stationary source of the acceptable specifications is below 200,000 pounds per year for GMAW and 28,000 pounds per year for SMAW or FCAW. Records that identify the type and annual amount of welding electrode used shall be maintained on site by the owner or operator for a period of at least two calendar years. For stationary sources where electrode usage exceeds these levels, the welding activity at the stationary source may be exempted if the amount of electrode used (Y) is less than: Y = the greater of 1380x - 19,200 or 200,000 for GMAW, or Y = the greater of 187x - 2,600 or 28,000 for SMAW or FCAW Where "x" is the minimum distance to the property line in feet and "Y" is the annual electrode usage in pounds per year. If the stationary source has welding processes that fit into both of the specified exemptions, the most stringent limits must be applied. 2. Welding operations for which initiation of construction, installation, reconstruction, or alteration (as defined in 567-22.1 (455B)) occurred after October 23, 2013, using a consumable electrode, provided that the consumable electrode used falls within American Welding Society specification A5.18/A5.18M for Gas Metal Arc Welding (GMAW), A5.1 or A5.5 for Shielded Metal Arc Welding (SMAW), and A5.20 for Flux Core Arc Welding (FCAW), and provided that the quantity of all electrodes used at the stationary source of the acceptable specifications is below 12,500 pounds per year for GMAW and 1,600 pounds per year for SMAW or FCAW. Records that identify the type and annual amount of welding electrode used shall be maintained on site by the owner or operator for a period of at least two calendar years. For stationary sources where electrode usage exceeds these levels, the welding activity at the stationary source may be exempted if the amount of electrode used (Y) is less than: Y = the greater of 84x - 1,200 or 12,500 for GMAW, or Y = the greater of 11x - 160 or 1,600 for SMAW or FCAW Where "x" is the minimum distance to the property line in feet and "Y" is the annual electrode usage in pounds per year. If the stationary source has welding processes that fit into both of the specified exemptions, the most stringent limits must be applied. (2) Resistance welding, submerged arc welding, or arc welding that does not use a consumable electrode, provided that the base metals do not include stainless steel, alloys of lead, alloys of arsenic, or alloys of beryllium and provided that the base metals are uncoated, excluding manufacturing process lubricants. gg. Electric hand soldering, wave soldering, and electric solder paste reflow ovens for which initiation of construction, installation, reconstruction, or alteration (as defined in 567-22.1 (455B)) occurred on or before October 23, 2013. Electric hand soldering, wave soldering, and electric solder paste reflow ovens for which initiation of construction, installation, reconstruction, or alteration (as defined in 567-2.1 (455B)) occurred after October 23, 2013, shall be limited to 37,000 pounds or less per year of lead-containing solder. Records shall be maintained on site by the owner or operator for at least two calendar years to demonstrate that use of lead-containing solder is less than the exemption thresholds. hh. Pressurized piping and storage systems for natural gas, propane, liquefied petroleum gas (LPG), and refrigerants, where emissions could only result from an upset condition. ii. Emissions from the storage and mixing of paints and solvents associated with the painting operations, provided that the emissions from the storage and mixing are accounted for in an enforceable permit condition or are otherwise exempt. jj. Product labeling using laser and ink-jet printers with target distances less than or equal to six inches and an annual material throughput of less than 1,000 gallons per year as calculated on a stationary sourcewide basis. kk. Equipment related to research and development activities at a stationary source, provided that: (1) Actual emissions from all research and development activities at the stationary source based on a 12-month rolling total are less than the following levels: 1. 2 pounds per year of lead and lead compounds expressed as lead (40 pounds per year for research and development activities that commenced on or before October 23, 2013); 2. 5 tons per year of sulfur dioxide; 3. 5 tons per year of nitrogen oxides; 4. 5 tons per year of volatile organic compounds; 5. 5 tons per year of carbon monoxide; 6. 5 tons per year of particulate matter (particulate matter as defined in 40 CFR 51.100(pp) as amended through November 7, 1986); 7. 2.5 tons per year of PM10; 8. 0.52 tons per year of PM2.5 (does not apply to research and development activities that commenced on or before October 23, 2013); and 9. 5 tons per year of hazardous pollutants (as defined in 567-24.100 (455B)); and (2) The owner or operator maintains records of actual operations demonstrating that the annual emissions from all research and development activities conducted under this exemption are below the levels listed in 22.1(2)"kk"(1). These records shall: 1. Include a list of equipment that is included under the exemption; 2. Include records of actual operation and detailed calculations of actual annual emissions, reflecting the use of any control equipment and demonstrating that the emissions are below the levels specified in the exemption; 3. Include, if air pollution equipment is used in the calculation of emissions, a copy of any report of manufacturer's testing, if available. The department may require a test if it believes that a test is necessary for the exemption claim; and 4. Be maintained on site for a minimum of two years, be made available for review during normal business hours and for state and EPA on-site inspections, and be provided to the director or the director's designee upon request. Facilities designated as major sources pursuant to 567-22.4 (455B) and 567-24.101 (455B), or subject to any applicable federal requirements, shall retain all records demonstrating compliance with this exemption for five years. (3) An owner or operator using this exemption obtains a construction permit or ceases operation of equipment if operation of the equipment would cause the emission levels listed in this exemption to be exceeded. For the purposes of this exemption, "research and development activities" shall be defined as activities: 1. That are operated under the close supervision of technically trained personnel; 2. That are conducted for the primary purpose of theoretical research or research and development into new or improved processes and products; 3. That do not manufacture more than de minimus amounts of commercial products; and 4. That do not contribute to the manufacture of commercial products by collocated sources in more than a de minimus manner. ll. A regional collection center (RCC), as defined in 567-Chapter 211, involved in the processing of permitted hazardous materials from households and conditionally exempt small quantity generators (CESQG), not to exceed 1,200,000 pounds of VOC-containing material in a 12-month rolling period. Latex paint drying may not exceed 120,000 pounds per year on a 12-month rolling total. Other nonprocessing emission units (e.g., standby generators and waste oil heaters) shall not be eligible to use this exemption. mm. Cold solvent cleaning machines that are not in-line cleaning machines, where the maximum vapor pressure of the solvents used shall not exceed 0.7 kPa (5 mmHg or 0.1 psi) at 20°C (68°F). The machine must be equipped with a tightly fitted cover or lid that shall be closed at all times except during parts entry and removal. This exemption cannot be used for cold solvent cleaning machines that use solvent containing methylene chloride (CAS # 75-09-2), perchloroethylene (CAS # 127-18-4), trichloroethylene (CAS # 79-01-6), 1,1,1-trichloroethane (CAS # 71-55-6), carbon tetrachloride (CAS # 56-23-5) or chloroform (CAS # 67-66-3), or any combination of these halogenated HAP solvents in a total concentration greater than 5 percent by weight. nn. Emissions from mobile over-the-road trucks, and mobile agricultural and construction internal combustion engines that are operated only for repair or maintenance purposes at equipment repair shops or equipment dealerships, and only when the repair shops or equipment dealerships are not major sources as defined in 567-24.100 (455B). oo. A nonroad diesel fueled engine, as "nonroad engine" is defined in 40 CFR Section 1068.30 as amended through January 24, 2023, with a brake horsepower rating of less than 1,100 at full load measured at the shaft, used to conduct periodic testing and maintenance on natural gas pipelines. For the purposes of this exemption, the manufacturer's nameplate rating shall be defined as the brake horsepower output at the shaft at full load. (1) To qualify for the exemption, the engine must:1. Be used for periodic testing and maintenance on natural gas pipelines outside the compressor station, which shall not exceed 330 hours in any 12-month consecutive period at a single location; or 2. Be used for periodic testing and maintenance on natural gas pipelines within the compressor station, which shall not exceed 330 hours in any 12-month consecutive period. (2) The owner or operator shall maintain a monthly record of the number of hours the engine operated and a record of the rolling 12-month total of the number of hours the engine operated for each location outside the compressor station and within the compressor station. These records shall be maintained for two years. Records shall be made available to the department upon request. (3) This exemption shall not apply to the replacement or substitution of engines for backup power generation at a pipeline compressor station. (3) Construction permits. The owner or operator of a new or modified stationary source shall apply for a construction permit. Construction permit applications, including the information referenced above and in 567-22.1 (455B) through 567-22.10 (455B), shall be submitted in the electronic format specified by the department, if electronic submittal is provided. The owner or operator of any new or modified industrial anaerobic lagoon shall apply for a construction permit as specified in this subrule and as provided in 567-Chapter 22. The owner or operator of a new or modified anaerobic lagoon for an animal feeding operation shall apply for a construction permit as provided in 567-Chapter 65. a. Regulatory applicability determinations. If requested in writing, the director will review the design concepts of equipment and associated control equipment prior to application for a construction permit. The purpose of the review would be to determine the acceptability of the location of the equipment. If the review is requested, the requester shall supply the following information and submit a fee as required in 567-Chapter 30:(1) Preliminary plans and specifications of equipment and related control equipment. (2) The exact site location and a plot plan of the immediate area, including the distance to and height of nearby buildings and the estimated location and elevation of the emission points. (3) The estimated emission rates of any air contaminants that are to be considered. (4) The estimated exhaust gas temperature, velocity at the point of discharge, and stack diameter at the point of discharge. (5) An estimate of when construction would begin and when construction would be completed. b. Construction permit applications. Each application for a construction permit shall be submitted to the department. Final plans and specifications for the proposed equipment or related control equipment shall be submitted with the application for a permit and shall be prepared by or under the direct supervision of a professional engineer licensed in the state of Iowa in conformance with Iowa Code section 542B.1, or consistent with the provisions of Iowa Code section 542B.26 for any full-time employee of any corporation while the employee is doing work for that corporation. The application for a permit to construct shall include the following information: (1) A description of the equipment or control equipment covered by the application; (2) A scaled plot plan, including the distance and height of nearby buildings, and the location and elevation of existing and proposed emission points; (3) The composition of the effluent stream, both before and after any control equipment with estimates of emission rates, concentration, volume and temperature; (4) The physical and chemical characteristics of the air contaminants; (5) The proposed dates and description of any tests to be made by the owner or operator of the completed installation to verify compliance with applicable emission limits or standards of performance; (6) Information pertaining to sampling port locations, scaffolding, power sources for operation of appropriate sampling instruments, and pertinent allied facilities for making tests to ascertain compliance; (7) Any additional information deemed necessary by the department to determine compliance with or applicability of 567-22.4 (455B), 567-22.5 (455B), 567-31.3 (455B) and 567-33.3 (455B); (8) Reserved. (9) A signed statement that ensures the applicant's legal entitlement to install and operate equipment covered by the permit application on the property identified in the permit application. A signed statement shall not be required for rock crushers, portable concrete or asphalt equipment used in conjunction with specific identified construction projects that are intended to be located at a site only for the duration of the specific, identified construction project; and (10) Application fee. 1. The owner or operator shall submit a fee as required in 567-Chapter 30 to obtain a permit under 22.1(1), 567-22.4 (455B), 567-22.5 (455B), 567-22.8 (455B), 567-22.10 (455B), 567-Chapter 31 or 567-Chapter 33; 2. For application submittals from a minor source as defined in 567-Chapter 30, the department shall not initiate review and processing of a permit application submittal until all required application fees have been paid to the department; and (11) Quantity of greenhouse gas emissions for all applications for projects that will or do have greenhouse gas emissions. For all applications for projects that will not or do not have greenhouse gas emissions, the applicant shall indicate in the application that no greenhouse gases will be emitted and the applicant will not be required to file an inventory of greenhouse gases with that application, unless requested by the department. c. Application requirements for anaerobic lagoons. The application for a permit to construct an anaerobic lagoon shall include the following information: (1) The source of the water being discharged to the lagoon; (2) A plot plan, including distances to nearby residences or occupied buildings, local land use zoning maps of the vicinity, and a general description of the topography in the vicinity of the lagoon; (3) In the case of an animal feeding operation, the information required in 567-Chapter 65; (4) In the case of an industrial source, a chemical description of the waste being discharged to the lagoon; (5) A report of sulfate analyses conducted on the water to be used for any purpose in a livestock operation proposing to use an anaerobic lagoon. The report shall be prepared by using standard methods as defined in 567-60.2 (455B); (6) A description of available water supplies to prove that adequate water is available for dilution; (7) In the case of an animal feeding operation, a waste management plan describing the method of waste collection and disposal and the land to be used for disposal. Evidence that the waste disposal equipment is of sufficient size to dispose of the wastes within a 20-day period per year shall also be provided; (8) Any additional information needed by the department to determine compliance with these rules." scope="agency:567:title:II">exemptions from certain requirements for PSD-subject sources as specified in 40 CFR 52.21(i) are adopted by reference.
(10) Control technology review. The provisions for control technology review as specified in 40 CFR 52.21(j) are adopted by reference.
(11) Source impact analysis. The provisions for a source impact analysis as specified in 40 CFR 52.21(k) are adopted by reference.
(12) Air quality models. The provisions for air quality models as specified in 40 CFR 52.21(l) are adopted by reference.
(13) Air quality analysis. The provisions for an air quality analysis as specified in 40 CFR 52.21(m) are adopted by reference.
(14) Source information. The provisions for providing source information as specified in 40 CFR 52.21(n) are adopted by reference.
(15) Additional impact analyses. The provisions for an additional impact analysis as specified in 40 CFR 52.21(o) are adopted by reference.
(16) Sources impacting federal Class I areas-additional requirements. The provisions for sources impacting federal Class I areas as specified in 40 CFR 51.166(p) are adopted by reference.
(17) Public participation.
a. The department shall notify all applicants within 30 days as to the completeness of the application or any deficiency in the application or information submitted. In the event of such a deficiency, the date of receipt of the application shall be the date on which the department received all required information.
b. Within one year after receipt of a complete application, the department shall:
(1) Make a preliminary determination whether construction should be approved, approved with conditions, or disapproved.
(2) Make available in at least one location in each region in which the proposed source would be constructed a copy of all materials the applicant submitted, a copy of the preliminary determination, and a copy or summary of other materials, if any, considered in making the preliminary determination.
(3) Notify the public, by posting on a publicly available website identified by the department, of the application, of the preliminary determination, of the degree of increment consumption that is expected from the source or modification, and of the opportunity for comment at a public hearing as well as written public comment. The electronic notice shall be available for the duration of the public comment period and shall include the notice of public comment, the draft permit(s), information on how to access the administrative record for the draft permit(s) and how to request or attend a public hearing on the draft permit(s). The department may use other means if necessary to ensure adequate notice to the affected public. At least 30 days shall be provided for public comment and for notification of any public hearing.
(4) Send a copy of the notice of public comment to the applicant, to the Administrator and to officials and agencies having cognizance over the location where the proposed construction would occur as follows: any other state or local air pollution control agencies; the chief executives of the city and county where the source would be located; any comprehensive regional land use planning agency; and any state, federal land manager, or Indian governing body whose lands may be affected by emissions from the source or modification.
(5) Provide opportunity for a public hearing for interested persons to appear and submit written or oral comments on the air quality impact of the source, alternatives to the proposed source or modification, the control technology required, and other appropriate considerations. At least 30 days' notice shall be provided for any public hearing.
(6) Consider all written comments submitted within a time specified in the notice of public comment and all comments received at any public hearing(s) in making a final decision on the approvability of the application. The department shall make all comments available for public inspection at the same locations where the department made available preconstruction information relating to the proposed source or modification.
(7) Make a final determination whether construction should be approved, approved with conditions, or disapproved.
(8) Notify the applicant in writing of the final determination and make such notification available for public inspection at the same locations where the department made available preconstruction information and public comments relating to the proposed source or modification.
c. Reopening of the public comment period.
(1) If comments submitted during the public comment period raise substantial new issues concerning the permit, the department may, at its discretion, take one or more of the following actions:
1. Prepare a new draft permit, appropriately modified;
2. Prepare a revised fact sheet;
3. Prepare a revised fact sheet and reopen the public comment period; or
4. Reopen or extend the public comment period to provide interested persons an opportunity to comment on the comments submitted.
(2) The public notice provided by the department pursuant to this rule shall define the scope of the reopening. Department review of any comments filed during a reopened comment period shall be limited to comments pertaining to the substantial new issues causing the reopening.
(18) Source obligation.
a. Approval to construct shall not relieve any owner or operator of the responsibility to comply fully with applicable provisions of the plan and any other requirements under local, state or federal law.
b. 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 that was established after August 7, 1980, on the capacity of the source or modification otherwise to emit a pollutant, such as a restriction on hours of operation, the requirements of 33.3(10) through 33.3(19) shall apply to the source or modification as though construction had not yet commenced on the source or modification.
c. Any owner or operator who constructs or operates a source or modification not in accordance with the application pursuant to the provisions in 567-33.3 (455B) or with the terms of any approval to construct, or any owner or operator of a source or modification subject to the provisions in 567-33.3 (455B) who commences construction after April 15, 1987 (the effective date of Iowa's PSD program), without applying for and receiving department approval, shall be subject to appropriate enforcement action.
d. Approval to construct shall become invalid if construction is not commenced within 18 months after receipt of such approval, if construction is discontinued for a period of 18 months or more, or if construction is not completed within a reasonable time. The department may extend the 18-month period upon a satisfactory showing that an extension is justified. These provisions do not apply to the time between construction of the approved phases of a phased construction project; each phase must commence construction within 18 months of the projected and approved commencement date.
e. Reserved.
f. Except as otherwise provided in subparagraph (8), the following specific provisions shall apply with respect to any regulated NSR pollutant emitted from projects at existing emissions units at a major stationary source, other than projects at a source with a PAL, in circumstances where there is a "reasonable possibility," within the meaning of subparagraph (8), that a project that is not part of a major modification may result in a significant emissions increase of such pollutant, and the owner or operator elects to use the method for calculating projected actual emissions as specified in 33.3(1), paragraphs "1" through "3" of the definition of "projected actual emissions."
(1) Before beginning actual construction of the project, the owner or operator shall document and maintain a record of the following information:
1. A description of the project;
2. Identification of the emissions unit(s) whose emissions of a regulated NSR pollutant could be affected by the project; and
3. A description of the applicability test used to determine that the project is not a major modification for any regulated NSR pollutant, including the baseline actual emissions, the projected actual emissions, the amount of emissions excluded under paragraph "3" of the definition of "projected actual emissions" in 33.3(1), an explanation describing why such amount was excluded, and any netting calculations, if applicable.
(2) No less than 30 days before beginning actual construction, the owner or operator shall meet with the department to discuss the owner's or operator's determination of projected actual emissions for the project and shall provide to the department a copy of the information specified in 33.3(18)"f." The owner or operator is not required to obtain a determination from the department regarding the project's projected actual emissions prior to beginning actual construction.
(3) If the emissions unit is an existing electric utility steam generating unit, before beginning actual construction, the owner or operator shall provide a copy of the information set out in subparagraph (1) to the department. The requirements in subparagraphs (1), (2) and (3) shall not be construed to require the owner or operator of such a unit to obtain any determination from the department before beginning actual construction.
(4) The owner or operator shall:
1. Monitor the emissions of any regulated NSR pollutant that could increase as a result of the project and that is emitted by any emissions unit identified in subparagraph (1);
2. Calculate the annual emissions, in tons per year on a calendar-year basis, for a period of five years following resumption of regular operations and maintain a record of regular operations after the change, or for a period of ten years following resumption of regular operations after the change if the project increases the design capacity or potential to emit of that regulated NSR pollutant at such emissions unit (for purposes of this requirement, "regular" shall be determined by the department on a case-by-case basis); and
3. Maintain a written record containing the information required in this subparagraph.
(5) The written record containing the information required in subparagraph (4) shall be retained by the owner or operator for a period of ten years after the project is completed.
(6) If the unit is an existing electric utility steam generating unit, the owner or operator shall submit a report to the department within 60 days after the end of each year during which records must be generated under subparagraph (4) setting out the unit's annual emissions during the calendar year that preceded submission of the report.
(7) If the unit is an existing unit other than an electric utility steam generating unit, the owner or operator shall submit a report to the department if the annual emissions, in tons per year, from the project identified in subparagraph (1), exceed the baseline actual emissions, as documented and maintained pursuant to subparagraph (4), by an amount that is "significant" as defined in 33.3(1) for that regulated NSR pollutant, and if such emissions differ from the preconstruction projection as documented and maintained pursuant to subparagraph (4). Such report shall be submitted to the department within 60 days after the end of such year. The report shall contain the following:
1. The name, address and telephone number of the major stationary source;
2. The annual emissions as calculated pursuant to subparagraph (4); and
3. Any other information that the owner or operator wishes to include in the report (e.g., an explanation as to why the emissions differ from the preconstruction projection).
(8) A "reasonable possibility" under this paragraph (33.3(18)"f") occurs when the owner or operator calculates the project to result in either:
1. A projected actual emissions increase of at least 50 percent of the amount that is a "significant emissions increase," as defined under 33.3(1) (without reference to the amount that is a significant net emissions increase), for the regulated NSR pollutant; or
2. A projected actual emissions increase that, when added to the amount of emissions excluded under 33.3(1), paragraph "3" of the definition of "projected actual emissions," equals at least 50 percent of the amount that is a "significant emissions increase," as defined under 33.3(1) (without reference to the amount that is a significant net emissions increase), for the regulated NSR pollutant. For a project for which a reasonable possibility occurs only within the meaning of this numbered paragraph, and not also within the meaning of numbered paragraph "1" of this subparagraph (subparagraph (8)), then the provisions of subparagraphs (3) through (7) do not apply to the project.
g. The owner or operator of the source shall make the information required to be documented and maintained pursuant to paragraph 33.3(18)"f" available for review upon request for inspection by the department or the general public pursuant to the requirements for Title V operating permits contained in 567-subrule 22.107(6).
(19) Innovative control technology. The provisions for innovative control technology as specified in 40 CFR 51.166(s) are adopted by reference.
(20) Conditions for permit issuance. Except as explained below, a permit may not be issued to any new "major stationary source" or "major modification" as defined in 33.3(1) that would locate in any area designated as attainment or unclassifiable for any national ambient air quality standard pursuant to Section 107 of the Act, when the source or modification would cause or contribute to a violation of any national ambient air quality standard. A major stationary source or major modification will be considered to cause or contribute to a violation of a national ambient air quality standard when such source or modification would, at a minimum, exceed the following significance levels at any locality that does not or would not meet the applicable national standard:

Averaging Time

Annual

24 hrs.

8 hrs.

3 hrs.

1 hr.

Pollutant

(µg/m3)

(µg/m3)

(µg/m3)

(µg/m3)

(µg/m3)

SO2

1.0

5

____

25

____

PM10

1.0

5

____

____

____

PM2.5

0.3

1.2

____

____

____

NO2

1.0

____

____

____

____

CO

____

____

500

____

2,000

A permit may be granted to a major stationary source or major modification as identified above if the major stationary source or major modification reduces the impact of its emissions upon air quality by obtaining sufficient emissions reductions to compensate for its adverse ambient air impact where the major stationary source or major modification would otherwise contribute to a violation of any national ambient air quality standard. This subrule shall not apply to a major stationary source or major modification with respect to a particular pollutant if the owner or operator demonstrates that the source is located in an area designated under Section 107 of the Act as nonattainment for that pollutant.

(21) Administrative amendments.
a. Upon request for an administrative amendment, the department may take final action on any such request and may incorporate the requested changes without providing notice to the public or to affected states, provided that the department designates any such permit revisions as having been made pursuant to 33.3(21).
b. An administrative amendment is a permit revision that does any of the following:
(1) Corrects typographical errors;
(2) Corrects word processing errors;
(3) Identifies a change in name, address or telephone number of any person identified in the permit or provides a similar minor administrative change at the source; or
(4) Allows for a change in ownership or operational control of a source where the department determines that no other change in the permit is necessary, provided that a written agreement that contains a specific date for transfer of permit responsibility, coverage, and liability between the current permittee and the new permittee has been submitted to the department.
(22) Permit rescission. Any permit issued under 40 CFR 52.21 or this chapter or any permit issued under 567-22.4 (455B) shall remain in effect unless and until it expires or is rescinded under 40 CFR 52.21(w) or this chapter. The provisions for permit rescission as set forth in 40 CFR 52.21(w) are adopted by reference. The department will consider requests for rescission that meet the conditions specified in this subrule. If the department rescinds a permit or a condition in a permit issued under 40 CFR 52.21, this chapter, or 567-22.4 (455B), the public shall be given adequate notice of the proposed rescission. Posting of an announcement of rescission on a publicly available website identified by the department 60 days prior to the proposed date for rescission shall be considered adequate notice.

Notes

Iowa Admin. Code r. 567-33.3
ARC 8215B, IAB 10/7/09, effective 11/11/09; ARC 9224B, IAB 11/17/10, effective 12/22/10; ARC 9906B, IAB 12/14/11, effective 11/16/11; ARC 0260C, IAB 8/8/12, effective 9/12/12; ARC 0783C, IAB 6/12/2013, effective 7/17/2013 Amended by IAB March 18, 2015/Volume XXXVII, Number 19, effective 4/22/2015 Amended by IAB February 15, 2017/Volume XXXIX, Number 17, effective 3/22/2017 Amended by IAB March 14, 2018/Volume XL, Number 19, effective 4/18/2018 Amended by IAB June 17, 2020/Volume XLII, Number 26, effective 7/22/2020 Adopted by IAB May 15, 2024/Volume XLVI, Number 24, effective 6/19/2024

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