9VAC5-80-1110. Definitions.

A. For the purpose of applying this article in the context of the Regulations for the Control and Abatement of Air Pollution and related uses, the words or terms shall have the meanings given them in subsection C of this section.

B. As used in this article, all terms not defined herein shall have the meanings given them in 9VAC5-10 (General Definitions), unless otherwise required by context.

C. Terms defined.

"Addition" means the construction of a new emissions unit at or the relocation of an existing emissions unit to a stationary source.

"Affected emissions units" means the following emissions units, as applicable:

1. For a new stationary source, all emissions units.

2. For a project, the added, modified, and replacement emissions units that are part of the project.

"Applicable federal requirement" means all of, but not limited to, the following as they apply to affected emissions units subject to this article (including requirements that have been promulgated or approved by the administrator through rulemaking at the time of permit issuance but have future-effective compliance dates):

1. Any standard or other requirement provided for in an implementation plan established pursuant to § 110, § 111(d), or § 129 of the federal Clean Air Act, including any source-specific provisions such as consent agreements or orders.

2. Any term or condition in any construction permit issued under the new source review program or in any operating permit issued pursuant to the state operating permit program. However, those terms or conditions designated as state-only enforceable pursuant to 9VAC5-80-1120 F or 9VAC5-80-820 G shall not be applicable federal requirements.

3. Any emission standard, alternative emission standard, alternative emissions limitation, equivalent emissions limitation or other requirement established pursuant to § 112 or § 129 of the federal Clean Air Act as amended in 1990.

4. Any new source performance standard or other requirement established pursuant to § 111 of the federal Clean Air Act, and any emission standard or other requirement established pursuant to § 112 of the federal Clean Air Act before it was amended in 1990.

5. Any limitations and conditions or other requirement in a Virginia regulation or program that has been approved by EPA under Subpart E of 40 CFR Part 63 for the purposes of implementing and enforcing § 112 of the federal Clean Air Act.

6. Any requirement concerning accident prevention under § 112(r)(7) of the federal Clean Air Act.

7. Any compliance monitoring requirements established pursuant to either § 504(b) or § 114(a)(3) of the federal Clean Air Act.

8. Any standard or other requirement for consumer and commercial products under § 183(e) of the federal Clean Air Act.

9. Any standard or other requirement for tank vessels under § 183(f) of the federal Clean Air Act.

10. Any standard or other requirement in 40 CFR Part 55 to control air pollution from outer continental shelf sources.

11. Any standard or other requirement of the regulations promulgated to protect stratospheric ozone under Title VI of the federal Clean Air Act, unless the administrator has determined that such requirements need not be contained in a federal operating permit.

12. With regard to temporary sources subject to 9VAC5-80-130, (i) any ambient air quality standard, except applicable state requirements, and (ii) requirements regarding increments or visibility as provided in Article 8 (9VAC5-80-1605 et seq.) of this part.

13. Any standard or other requirement under § 126 (a)(1) and (c) of the federal Clean Air Act.

"Begin actual construction" means initiation of permanent physical on-site construction of an emissions unit. This includes, but is 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 which mark the initiation of the change. With respect to the initial location or relocation of a portable emissions unit, this term refers to the delivery of any portion of the portable emissions unit to the site.

"Clean wood" means uncontaminated natural or untreated wood. Clean wood includes but is not limited to byproducts of harvesting activities conducted for forest management or commercial logging, or mill residues consisting of bark, chips, edgings, sawdust, shavings, or slabs. It does not include wood that has been treated, adulterated, or chemically changed in some way; treated with glues, binders, or resins; or painted, stained, or coated.

"Commence," as applied to the construction of an emissions unit, means that the owner has all necessary preconstruction approvals or permits and has either:

1. Begun, or caused to begin, a continuous program of actual on-site construction of the unit, 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, to undertake a program of actual construction of the unit, to be completed within a reasonable time.

"Complete application" means that the application contains all the information necessary for processing the application and that the provisions of § 10.1-1321.1 of the Virginia Air Pollution Control Law have been met. Designating an application complete for purposes of permit processing does not preclude the board from requesting or accepting additional information.

"Construction" means fabrication, erection, installation, demolition, relocation, addition, replacement, or modification of an emissions unit that would result in a change in the uncontrolled emission rate.

"Construction waste" means solid waste that is produced or generated during construction, remodeling, or repair of pavements, houses, commercial buildings, and other structures. Construction wastes include, but are not limited to, lumber, wire, sheetrock, broken brick, shingles, glass, pipe, concrete, paving materials, and metal and plastics if the metal or plastics are a part of the materials of construction or empty containers for such materials. Paints, coatings, solvents, asbestos, any liquid, compressed gases or semi-liquids, and garbage are not construction wastes.

"Debris waste" means wastes resulting from land clearing operations. Debris wastes include, but are not limited to, stumps, wood, brush, leaves, soil, and road spoils.

"Demolition waste" means that solid waste that is produced by the destruction of structures or their foundations, or both, and includes the same materials as construction wastes.

"Diesel engine" means, for the purposes of 9VAC5-80-1105 A 1 b, any internal combustion engine that burns diesel or #2 fuel oil to provide power to processing equipment for a vegetative waste recycling/mulching operation.

"Emergency" means a condition that arises from sudden and reasonably unforeseeable events where the primary energy or power source is disrupted or disconnected due to conditions beyond the control of an owner or operator of a facility including:

1. A failure of the electrical grid;

2. On-site disaster or equipment failure;

3. Public service emergencies such as flood, fire, natural disaster, or severe weather conditions; or

4. An ISO-declared emergency, where an ISO emergency is:

a. An abnormal system condition requiring manual or automatic action to maintain system frequency, to prevent loss of firm load, equipment damage, or tripping of system elements that could adversely affect the reliability of an electric system or the safety of persons or property;

b. Capacity deficiency or capacity excess conditions;

c. A fuel shortage requiring departure from normal operating procedures in order to minimize the use of such scarce fuel;

d. Abnormal natural events or man-made threats that would require conservative operations to posture the system in a more reliable state; or

e. An abnormal event external to the ISO service territory that may require ISO action.

"Emissions cap" means any limitation on the rate of emissions of any air pollutant from one or more emissions units established and identified as an emissions cap in any permit issued pursuant to the new source review program or operating permit program.

"Emissions limitation" means a requirement established by the board that limits the quantity, rate, or concentration of emissions of air pollutants on a continuous basis, including any requirement relating to the operation or maintenance of a source to assure continuous emissions reduction, and any design standard, equipment standard, work practice, operational standard, or pollution prevention technique.

"Emissions unit" means any part of a stationary source which emits or would have the potential to emit any regulated air pollutant.

"Enforceable as a practical matter" means that the permit contains emissions limitations that are enforceable by the board or the department and meet the following criteria:

1. Are permanent;

2. Contain a legal obligation for the owner to adhere to the terms and conditions;

3. Do not allow a relaxation of a requirement of the implementation plan;

4. Are technically accurate and quantifiable;

5. Include averaging times or other provisions that allow at least monthly (or a shorter period if necessary to be consistent with the implementation plan) checks on compliance. This may include, but not be limited to, the following: compliance with annual limits in a rolling basis, monthly or shorter limits, and other provisions consistent with this article and other regulations of the board; and

6. Require a level of recordkeeping, reporting and monitoring sufficient to demonstrate compliance.

"Existing stationary source" means any stationary source other than a new stationary source.

"Federal hazardous air pollutant new source review program" means a program for the preconstruction review and approval of the construction, reconstruction, or modification of any stationary source in accordance with regulations specified below and promulgated to implement the requirements of § 112 (relating to hazardous air pollutants) of the federal Clean Air Act.

1. The provisions of 40 CFR 61.05, 40 CFR 61.06, 40 CFR 61.07, 40 CFR 61.08 and 40 CFR 61.15 for issuing approvals of the construction of any new source or modification of any existing source subject to the provisions of 40 CFR Part 61.

2. The provisions of 40 CFR 63.5 for issuing approvals to construct a new source or reconstruct a source subject to the provisions of 40 CFR Part 63, except for Subparts B, D and E.

3. The provisions of 40 CFR 63.50 through 40 CFR 63.56 for issuing Notices of MACT Approval prior to the construction of a new emissions unit.

"Federally enforceable" means all limitations and conditions that are enforceable by the administrator and citizens under the federal Clean Air Act or that are enforceable under other statutes administered by the administrator. Federally enforceable limitations and conditions include, but are not limited to, the following:

1. Emission standards, alternative emission standards, alternative emissions limitations, and equivalent emissions limitations established pursuant to § 112 of the federal Clean Air Act, as amended in 1990.

2. New source performance standards established pursuant to § 111 of the federal Clean Air Act, and emission standards established pursuant to § 112 of the federal Clean Air Act before it was amended in 1990.

3. All terms and conditions (unless expressly designated as state-only enforceable) in a federal operating permit, including any provisions that limit a source's potential to emit.

4. Limitations and conditions that are part of an implementation plan established pursuant to § 110, § 111(d) or § 129 of the federal Clean Air Act.

5. Limitations and conditions (unless expressly designated as state-only enforceable) that are part of a federal construction permit issued under 40 CFR 52.21 or any construction permit issued under regulations approved by EPA into the implementation plan.

6. Limitations and conditions (unless expressly designated as state-only enforceable) that are part of a state operating permit where the permit and the permit program pursuant to which it was issued meet all of the following criteria:

a. The operating permit program has been approved by the EPA into the implementation plan under § 110 of the federal Clean Air Act.

b. The operating permit program imposes a legal obligation that operating permit holders adhere to the terms and limitations of such permits and provides that permits that do not conform to the operating permit program requirements and the requirements of EPA's underlying regulations may be deemed not federally enforceable by EPA.

c. The operating permit program requires that all emissions limitations, controls, and other requirements imposed by such permits will be at least as stringent as any other applicable limitations and requirements contained in the implementation plan or enforceable under the implementation plan, and that the program may not issue permits that waive, or make less stringent, any limitations or requirements contained in or issued pursuant to the implementation plan, or that are otherwise federally enforceable.

d. The limitations, controls, and requirements in the permit in question are permanent, quantifiable, and otherwise enforceable as a practical matter.

e. The permit in question was issued only after adequate and timely notice and opportunity for comment by the EPA and the public.

7. Limitations and conditions in a regulation of the board or program that has been approved by EPA under Subpart E of 40 CFR Part 63 for the purposes of implementing and enforcing § 112 of the federal Clean Air Act.

8. Individual consent agreements that EPA has legal authority to create.

"Federal operating permit" means a permit issued under the federal operating permit program.

"Federal operating permit program" means an operating permit system (i) for issuing terms and conditions for major stationary sources, (ii) established to implement the requirements of Title V of the federal Clean Air Act and associated regulations, and (iii) codified in Article 1 (9VAC5-80-50 et seq.), Article 2 (9VAC5-80-310 et seq.), Article 3 (9VAC5-80-360 et seq.), and Article 4 (9VAC5-80-710 et seq.) of this part.

"Fixed capital cost" means the capital needed to provide all the depreciable components.

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

"General permit" means a permit issued under this article that meets the requirements of 9VAC5-80-1250.

"Hazardous air pollutant" means (i) any air pollutant listed in § 112(b) of the federal Clean Air Act, as amended by Subpart C of 40 CFR Part 63, and (ii) incorporated by reference into the regulations of the board at 9VAC5-60-92 B.

"Independent system operator" or "ISO" means a person that may receive or has received by transfer pursuant to § 56-576 of the Code of Virginia any ownership or control of, or any responsibility to operate, all or part of the transmission systems in the Commonwealth.

"Major modification" means any project at a major stationary source that would result in a significant emissions increase in any regulated air pollutant. For projects, the emissions increase may take into consideration any state and federally enforceable permit conditions that will be placed in a permit resulting from a permit application deemed complete under the provisions of 9VAC5-80-1160 B.

"Major new source review (NSR) permit" means a permit issued under the major new source review program.

"Major new source review (major NSR) program" means a preconstruction review and permit program (i) for new major stationary sources or major modifications (physical changes or changes in the method of operation); (ii) established to implement the requirements of §§ 112, 165 and 173 of the federal Clean Air Act and associated regulations; and (iii) codified in Article 7 (9VAC5-80-1400 et seq.), Article 8 (9VAC5-80-1605 et seq.) and Article 9 (9VAC5-80-2000 et seq.) of this part.

"Major stationary source" means any stationary source that emits, or has the potential to emit, 100 tons or more per year of any regulated air pollutant. For new stationary sources, the potential to emit may take into consideration any state and federally enforceable permit conditions that will be placed in a permit resulting from a permit application deemed complete under the provisions of 9VAC5-80-1160 B.

"Minor new source review (NSR) permit" means a permit issued pursuant to this article.

"Minor new source review (minor NSR) program" means a preconstruction review and permit program (i) for regulated air pollutants from new stationary sources or projects that are not subject to review under the major new source review program; (ii) established to implement the requirements of §§ 110(a)(2)(C) and 112 of the federal Clean Air Act and associated regulations; and (iii) codified in this article. The minor NSR program may also be used to implement the terms and conditions described in 9VAC5-80-1120 F 1; however, those terms and conditions shall be state-only enforceable and shall not be applicable federal requirements.

"Modification" means any physical change in, or change in the method of operation of an emissions unit that increases the uncontrolled emission rate of any regulated air pollutant emitted into the atmosphere by the unit or that results in the emission of any regulated air pollutant into the atmosphere not previously emitted. The following shall not be considered physical changes or changes in the method of operation under this definition:

1. Maintenance, repair and replacement of components that the board determines to be routine for a source type and which does not fall within the definition of "replacement";

2. An increase in the throughput or production rate of a unit (unless previously limited by any state enforceable and federally enforceable permit conditions established pursuant to this chapter), if that increase does not exceed the operating design capacity of that unit;

3. An increase in the hours of operation (unless previously limited by any state enforceable and federally enforceable permit conditions established pursuant to this chapter);

4. Use of an alternative fuel or raw material (unless previously limited by any state enforceable and federally enforceable permit conditions established pursuant to this chapter) if, prior to the date any provision of the regulations of the board becomes applicable to the source type, the emissions unit was designed to accommodate that alternative use. A unit shall be considered to be designed to accommodate an alternative fuel or raw material if provisions for that use were included in the final construction specifications;

5. Use of an alternative fuel or raw material that the emissions unit is approved to use under any new source review permit;

6. The addition, replacement or use of any system or device whose primary function is the reduction of air pollutants, except when a system or device that is necessary to comply with applicable air pollution control laws, permit conditions or regulations is replaced by a system or device which the board considers to be less efficient in the control of air pollution emissions;

7. The removal of any system or device whose primary function is the reduction of air pollutants if the system or device is not (i) necessary for the source to comply with any applicable air pollution control laws, permit conditions, or regulations or (ii) used to avoid any applicable new source review program requirement; or

8. A change in ownership at a stationary source.

"Necessary preconstruction approvals or permits" means those permits or approvals required under the NSR program that is part of the implementation plan.

"New source review (NSR) permit" means a permit issued under the new source review program.

"New source review (NSR) program" means a preconstruction review and permit program (i) for regulated air pollutants from new stationary sources or projects (physical changes or changes in the method of operation); (ii) established to implement the requirements of §§ 110(a)(2)(C), 112 (relating to permits for hazardous air pollutants), 165 (relating to permits in prevention of significant deterioration areas), and 173 (relating to permits in nonattainment areas) of the federal Clean Air Act and associated regulations; and (iii) codified in this article, Article 7 (9VAC5-80-1400 et seq.), Article 8 (9VAC5-80-1605 et seq.) and Article 9 (9VAC5-80-2000 et seq.) of this part. The NSR program may also be used to implement the terms and conditions described in 9VAC5-80-1120 F 1; however, those terms and conditions shall be state-only enforceable and shall not be applicable federal requirements.

"New stationary source" means any stationary source to be constructed at or relocated to an undeveloped site.

"Nonroad engine" means any internal combustion engine:

1. In or on a piece of equipment that is self-propelled or serves a dual purpose by both propelling itself and performing another function (such as garden tractors, off-highway mobile cranes and bulldozers); or

2. In or on a piece of equipment that is intended to be propelled while performing its function (such as lawnmowers and string trimmers); or

3. That, by itself or in or on a piece of equipment, is portable or transportable, meaning designed to be capable of being carried or moved from one location to another. Indications of transportability include, but are not limited to, wheels, skids, carrying handles, dollies, trailers, or platforms.

An internal combustion engine is not a nonroad engine if (i) the engine is used to propel a motor vehicle or a vehicle used solely for competition, or is subject to standards promulgated under § 202 of the federal Clean Air Act; or (ii) the engine otherwise included in subdivision 3 of this definition remains or will remain at a location for more than 12 consecutive months or a shorter period of time for an engine located at a seasonal source.

For purposes of this definition, a location is any single site at a building, structure, facility, or installation. Any engine or engines that replaces an engine at a location and that is intended to perform the same or similar function as the engine replaced will be included in calculating the consecutive time period. An engine located at a seasonal source is an engine that remains at a seasonal source during the full annual operating period of the seasonal source. A seasonal source is a stationary source that remains in a single location on a permanent basis (i.e., at least two years) and that operates at the single location approximately three months or more each year. This subdivision does not apply to an engine after the engine is removed from the location.

"Plantwide applicability limitation (PAL)" means an emissions limitation expressed in tons per year, for a pollutant at a major stationary source, that is enforceable as a practical matter and established sourcewide in accordance with 9VAC5-80-1865 or 9VAC5-80-2144.

"PAL permit" means the state operating permit issued by the board that establishes a PAL for a major stationary source.

"Portable," in reference to emissions units, means an emissions unit that is designed to have the capability of being moved from one location to another for the purpose of operating at multiple locations and storage when idle. Indications of portability include, but are not limited to, wheels, skids, carrying handles, dolly, trailer, or platform.

"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 only if the limitation or its effect on emissions is state and federally enforceable. Secondary emissions do not count in determining the potential to emit of a stationary source.

"Precursor pollutant" means the following:

(1) 1. Volatile organic compounds and nitrogen oxides are precursors to ozone.

(2) 2. Sulfur dioxide is a precursor to PM_2.5.

(3) 3. Nitrogen oxides are presumed to be precursors to PM_2.5 in all PM_2.5, unless the board determines that emissions of nitrogen oxides from sources in a specific area are not a significant contributor to that area's ambient PM_2.5 concentrations.

(4) 4. Volatile organic compounds and ammonia are presumed not to be precursors to PM_2.5, unless the board determines that emissions of volatile organic compounds or ammonia from sources in a specific area are a significant contributor to that area's ambient PM_2.5 concentrations.

"Process operation" means any method, form, action, operation, or treatment of manufacturing or processing, including any storage or handling of materials or products before, during, or after manufacturing or processing.

"Project" means any change at an existing stationary source consisting of the addition, replacement, or modification of one or more emissions units.

"Public comment period" means a time during which the public shall have the opportunity to comment on the permit application information (exclusive of confidential information) for a new stationary source or project, the preliminary review and analysis of the effect of the source upon the ambient air quality, and the preliminary decision of the board regarding the permit application.

"Reactivation" means beginning operation of an emissions unit that has been shut down.

"Reconstruction" means, for the sole purposes of 9VAC5-80-1210 A, B, and C, the replacement of an emissions unit or its components to such an extent that:

1. The fixed capital cost of the new components exceeds 50% of the fixed capital cost that would be required to construct a comparable entirely new unit;

2. The replacement significantly extends the life of the emissions unit; and

3. It is technologically and economically feasible to meet the applicable emission standards prescribed under regulations of the board.

Any determination by the board as to whether a proposed replacement constitutes reconstruction shall be based on:

1. The fixed capital cost of the replacements in comparison to the fixed capital cost of the construction of a comparable entirely new unit;

2. The estimated life of the unit after the replacements compared to the life of a comparable entirely new unit;

3. The extent to which the components being replaced cause or contribute to the emissions from the unit; and

4. Any economic or technical limitations on compliance with applicable standards of performance that are inherent in the proposed replacements.

"Regulated air pollutant" means any of the following:

1. Nitrogen oxides or any volatile organic compound.

2. Any pollutant (including any associated precursor pollutant) for which an ambient air quality standard has been promulgated.

3. Any pollutant subject to any standard promulgated under 40 CFR Part 60.

4. Any pollutant subject to a standard promulgated under or other requirements established under 40 CFR Part 61 and any pollutant regulated under 40 CFR Part 63.

5. Any pollutant subject to a regulation adopted by the board.

"Relocation" means a change in physical location of a stationary source or an emissions unit from one stationary source to another stationary source.

"Replacement" means the substitution of an emissions unit for an emissions unit located at a stationary source, which will thereafter perform the same function as the replaced emissions unit.

"Secondary emissions" means emissions which occur or would occur as a result of the construction or operation of a new stationary source or an emissions unit, but do not come from the stationary source itself. For the purpose of this article, secondary emissions must be specific, well-defined, and quantifiable; and must affect the same general areas as the stationary source that causes the secondary emissions. Secondary emissions include emissions from any off site support facility that would not be constructed or increase its emissions except as a result of the construction or operation of the stationary source or emissions unit. Secondary emissions do 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 an emissions increase, an increase in potential to emit that would equal or exceed any of the following rates:

a. In ozone nonattainment areas classified as serious or severe in 9VAC5-20-204:

b. In all other areas:

2. In reference to an emissions increase for a regulated air pollutant not listed in subdivision 1 of this definition, there is no emissions rate that shall be considered significant.

3. If the particulate matter (PM₁₀ or PM_2.5) emissions for a stationary source or emissions unit can be determined in a manner acceptable to the board and the emissions increase is determined to be significant using the emission rate for particulate matter (PM₁₀ or PM_2.5), the stationary source or emissions unit shall be considered to be significant for particulate matter (PM). If the emissions of particulate matter (PM₁₀ or PM_2.5) cannot be determined in a manner acceptable to the board, the emission rate for particulate matter (PM) shall be used to determine whether the emissions increase is significant.

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

"Site" means one or more contiguous or adjacent properties under the control of the same person (or persons under common control).

"Source category schedule for standards" means the schedule (i) issued pursuant to § 112(e) of the federal Clean Air Act for promulgating MACT standards issued pursuant to § 112(d) of the federal Clean Air Act and (ii) incorporated by reference into the regulations of the board in subdivision 2 of 9VAC5-60-92.

"Space heater" means any fixed or portable, liquid or gaseous fuel-fired, combustion unit used to heat air in a space, or used to heat air entering a space, for the purpose of maintaining an air temperature suitable for comfort, storage, or equipment operation. Space heaters do not include combustion units used primarily for the purpose of conditioning or processing raw materials or product, such as driers, kilns, or ovens.

"State enforceable" means all limitations and conditions that are enforceable as a practical matter, including any regulation of the board, those requirements developed pursuant to 9VAC5-170-160, requirements within any applicable order or variance, and any permit requirements established pursuant to this chapter.

"State operating permit" means a permit issued under the state operating permit program.

"State operating permit program" means an operating permit program (i) for issuing limitations and conditions for stationary sources; (ii) promulgated to meet the EPA's minimum criteria for federal enforceability, including adequate notice and opportunity for the EPA and public comment prior to issuance of the final permit, and practicable enforceability; and (iii) codified in Article 5 (9VAC5-80-800 et seq.) of this part.

"Stationary source" means any building, structure, facility or installation that emits or may emit any regulated air pollutant. A stationary source shall include 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 watercraft or any nonroad engine. 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" (see 9VAC5-20-21).

"Synthetic minor source" means a stationary source that otherwise has the potential to emit regulated air pollutants in amounts that are at or above those for major stationary sources, as applicable, but is subject to restrictions such that its potential to emit is less than such amounts for major stationary sources. Such restrictions must be enforceable as a practical matter. The term "synthetic minor source" applies independently for each regulated air pollutant that the source has the potential to emit.

"Temporary facility" means a facility that (i) is operated to achieve a specific objective (such as serving as a pilot test facility, a process feasibility project, or a remediation project) and (ii) does not contribute toward the commercial production of any product or service (including byproduct and intermediate product) during the operational period. Portable emissions units covered by the exemption under 9VAC5-80-1105 A 1 c and facilities used to augment or enable routine production are not considered temporary facilities for the purposes of this definition.

"Toxic pollutant" means any air pollutant (i) listed in § 112(b) of the federal Clean Air Act, as amended by Subpart C of 40 CFR Part 63 and (ii) incorporated by reference into the regulations of the board at subdivision 1 of 9VAC5-60-92, or any other air pollutant that the board determines, through adoption of regulation, to present a significant risk to public health. This term excludes asbestos, fine mineral fibers, radionuclides, and any glycol ether that does not have a TLV®.

"Uncontrolled emission rate" means the emission rate from an emissions unit when operating at maximum capacity without air pollution control equipment. Air pollution control equipment includes control equipment that is not vital to its operation, except that its use enables the owner to conform to applicable air pollution control laws and regulations. Annual uncontrolled emissions shall be based on the maximum annual rated capacity (based on 8,760 hours of operation per year) of the emissions unit, unless the emissions unit or stationary source is subject to state and federally enforceable permit conditions that limit the annual hours of operation. Enforceable permit conditions on the type or amount of material combusted, stored, or processed may be used in determining the uncontrolled emission rate of an emissions unit or stationary source. The uncontrolled emission rate of a stationary source is the sum of the uncontrolled emission rates of the individual emissions units. Secondary emissions do not count in determining the uncontrolled emission rate of a stationary source.

"Undeveloped site" means any site or facility at which no emissions units are located at the time the permit application is deemed complete, or at the time the owner begins actual construction, whichever occurs first. An undeveloped site also includes any site or facility at which all of the emissions units have been determined to be shut down pursuant to the provisions of 9VAC5-20-220.

"Vegetative waste" means decomposable materials generated by land clearing activities and includes shrub, bush and tree prunings, bark, brush, leaves, limbs, roots, and stumps. Vegetative waste does not include construction or demolition waste or any combination of them.

"Vegetative waste recycling/mulching operation" means any activity related to size reduction or separating, or both, of clean wood or vegetative waste, or both, by grinding, shredding, chipping, screening, or any combination of them.