R307. Environmental Quality,Air Quality. R307-101. General Requirements. R307-101-2. Definitions. Except where specified in individual rules, definitions in R307-101-2 are applicable to all rules adopted by theAirQuality Board. "Actual Emissions" means the actual rate of emissions ofa pollutant from an emissions unit determined as follows: (1) 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 two-year period which precedes the particular date and which is representative ofnormal source operations. The director shall allowthe 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 ofmaterials processed, stored, or combusted duringthe selectedtimeperiod. (2) The director may presume that source-specific allowable emissions for the unit are equivalent to the actual emissions ofthe unit. (3) For any emission unit, other than an electric utility steam generating unit specified in ( 4), which has not begun normal operations on the particular date, actual emissions shall equal the potential to emit ofthe unit on that date. (4) For an electric utility steam generating unit (other than a new unit or the replacement ofan existing unit) actual emissions of the unit following the physical or operational change shall equal the representative actual annual emissions ofthe unit, provided the source owner or operator maintains and submits to the director, on an annual basis for a period of 

### 5 years from the date the unit resumes regular operation, information demonstrating that the physical or operational change did not result in an emissions increase. A longer period, not to exceed I0 years, may be required by the director ifthe director determines such a period to be more representative ofnormal sourcepost-change operations. "Acute Hazardous Air Pollutant" means any noncarcinogenic hazardous air pollutant for which a threshold limit value

- ceiling (TLV-C) has been adopted by the American Conference of Governmental Industrial Hygienists (ACGIH) in its "Threshold Limit Values for Chemical Substances and Physical Agents and Biological Exposure Indices, (2009)." "Air Contaminant" means any particulate matter or any gas, vapor, suspended solid or any combination ofthem, excluding steam and water vapors (Section 19-2-102(1)). "Air Contaminant Source" means any and all sources ofemission ofair contaminants whether privately or publicly owned oroperated (Section 19-2-102(2)). "AirPollution" means the presence in the ambient air ofone ormore air contaminants in such quantities and duration and under conditions and circumstances, as is or tends to be injurious to human health or welfare, animal or plant life, or property, or would unreasonably interfere with the enjoyment oflife or use ofproperty as determined by the standards, rules and regulations adopted by the Air Quality Board (Section 19- 2-104). "Allowable Emissions" means the emission rate ofa

source calculated using the maximum rated capacity of the

source (unless the source is subject to enforceable limits which restrict the operating rate, or hours ofoperation, or both) and the emission limitation established pursuantto R307-401-8. "Ambient Air" means the surrounding or outside air (Section 19-2-102(4)). "Appropriate Authority" means the governing body ofany city, town orcounty. "Atmosphere" means the air that envelops or surrounds the earth and includes all space outside ofbuildings, stacks orexteriorducts. "Authorized Local Authority" means a city, county, city-county or district health department; a city, county or combination fire department; or other local agency duly designated by appropriate authority, with approval ofthe state Department ofHealth; and other lawfully adopted ordinances, codes orregulations not in conflicttherewith. "Board" meansAir QualityBoard. See Section 19-2- 102(8)(a)."Breakdown" means any malfunction or procedural
error, to include but not limited to any malfunction or procedural error during start-up and shutdown, which will result in the inoperability or sudden loss ofperformance ofthe control equipment or process equipment causing emissions in

excess ofthose allowed byapproval orderorTitle R307. "BTU" means British Thermal Unit, the quantity of heat necessary to raise the temperature ofone pound ofwater

one degree Fahrenheit. "Calibration Drift" means the change in the instrument meterreadout over a stated period oftime ofnormal continuous operation when the 

## voe concentration at the time ofmeasurement is the same known upscale value. "Carbon Adsorption System" means a device containing adsorbent material (e.g., activated carbon, aluminum, silica gel), an inlet and outlet for exhaust gases, and

a systemforthe proper disposal orreuse ofall

## voe adsorbed. "Carcinogenic Hazardous Air Pollutant" means any hazardous air pollutant that is classified as a known human carcinogen (Al) or suspected human carcinogen (A2) by the American Conference of Governmental Industrial Hygienists (ACGIH) in its "Threshold Limit Values for Chemical Substances and Physical Agents and Biological Exposure Indices, (2009)." "Chargeable Pollutant" means any regulated air pollutantexceptthe following: (1) Carbon monoxide; (2) Any pollutant that is a regulated air pollutant solely because it is a Class I or II substance subject to a standard promulgated or established by Title VI of the Act, Stratospheric Ozone Protection; (3) Any pollutant that is a regulated air pollutant solely because it is subject to a standard or regulation under Section 112(r) ofthe Act, Prevention ofAccidental Releases. "Chronic Hazardous Air Pollutant" means any noncarcinogenic hazardous air pollutant for which a threshold limit value

- time weighted average (TLV-TWA) having nothreshold limit value

- ceiling (TLV-C) hasbeen adopted by the American Conference of Governmental Industrial Hygienists (ACGIH) in its "Threshold Limit Values for Chemical Substances and Physical Agents and Biological Exposure Indices, (2009)." "Clean Air Act" means federal Clean Air Act as amended in 1990. "Clean Coal Technology" means any technology, including technologies applied at the precombustion, combustion, or post combustion stage, at a new or existing facility which will achieve significant reductions in air emissions of sulfur dioxide or oxides of nitrogen associated with the utilization ofcoal in the generation ofelectricity, or process steam which was not in widespread use as of November 15, 1990. "Clean Coal Technology Demonstration Project"

means a project using funds appropriated under the heading "Department ofEnergy-Clean Coal Technology," up to a total
amount of $2,500,000,000 for commercial demonstration of clean coal technology, or similar projects funded through appropriations for the Environmental Protection Agency. The Federal contribution for a qualifying project shall be at least 20 percent ofthetotal costofthe demonstration project. "Clearing Index" means an indicator ofthe predicted
rate ofclearance ofground level pollutants from a given area Thisnumber is provided by theNational Weather Service. "Commence" as applied to construction of a major

source or major modification means that the owner or operator has all necessary pre-construction approvals or permits and eitherhas:(1) Begun, or caused to begin, a continuousprogram of actual on-site construction ofthe source, to be completed within areasonabletime; 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 ofactual construction ofthe source to be completed within areasonabletime. "Condensable PM2.5" means material that is vapor phase at stack conditions, but which condenses and/or reacts upon cooling and dilution in the ambient air to form solid or liquid particulate matter immediately after discharge from the stack. "Compliance Schedule" means a schedule ofevents, by date, which will result in compliancewiththese regulations. "Construction" means any physical change or change in the method of operation including fabrication, erection, installation, demolition, or modification of a source which would result in achange in actual emissions. "Control Apparatus" means any device which prevents or controls the emission of any air contaminant directly orindirectly intothe outdooratmosphere. "Department" means Utah State Department of Environmental Quality. See Section 19-1-103(1 ). "Director" means the Director ofthe Division ofAir Quality. See Section 19-1-103(1). "Division" meansthe Division ofAir Quality. "Electric Utility Steam Generating Unit" means any steam electric generatingunitthat is constructedforthe purpose ofsupplying more than one-third ofits 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 ofproviding steamto

a steam-electric generator that would produce electrical energy for sale is also considered in determining the electrical energy output capacity ofthe affected facility. "Emission" means the act of discharge into the atmosphere ofan air contaminant or an effluent which contains

ormay contain an aircontaminant; orthe effluent so discharged into the atmosphere. "Emissions Information" means, with reference to any source operation, equipmentor control apparatus: (1) Information necessary to determine the identity, amount, frequency, concentration, or other characteristics related to air quality of any air contaminant which has been emitted by the source operation, equipment, or control apparatus;(2) Information necessary to determine the identity, amount, frequency, concentration, or other characteristics (to the extent related to air quality) ofany air contaminant which, under an applicable standard or limitation, the source operation

was authorized to emit (including, to the extent necessary for such purposes, a description ofthe manner orrate ofoperation ofthe source operation), or any combination ofthe foregoing; and (3) A general description of the location and/or
nature of the source operation to the extent necessary to identify the source operation and to distinguish it from other

source operations (including, to the extent necessary for such purposes, a description ofthe device, installation, or operation constitutingthe source operation). "Emission Limitation" means a requirement established by the Board, the director or the Administrator, EPA, which limits the quantity, rate or concentration of emission ofair pollutants on a continuous emission reduction including any requirement relating to the operation or maintenance of a source to assure continuous emission reduction (Section 302(k)). "Emissions Unit" means any part of a stationary

source which emits or would have the potential to emit any pollutant subjectto regulation underthe CleanAirAct. "Enforceable" means all limitations and conditions which are enforceable by the Administrator, including those requirements developed pursuant to 40 CFR Parts 60 and 61, requirements within the State Implementation Plan and R307, any permit requirements established pursuant to 40 CFR 52.21

orR307-401. "EPA" means Environmental Protection Agency. "EPA Method 9" means 40 CFR Part 60, Appendix A, Method 9, "Visual Determination ofOpacity ofEmissions from Stationary Sources," and Alternate 1, "Determination of the opacity ofemissions from stationary sources remotely by LIDAR." "Executive Director" means the Executive Director ofthe Utah Department ofEnvironmental Quality. See Section 19-1-103(2)."Existing Installation" means an installation, construction ofwhich began prior to the effective date ofany regulation having application to it. "Facility" means machinery, equipment, structures of
any part or accessories thereof, installed or acquired for the primary purpose ofcontrolling or disposing ofairpollution. It does not include an air conditioner, fan or other similar device forthe comfort ofpersonnel. "Filterable PM2.5" means particles with an aerodynamic diameter equal to or less than 2.5 micrometers that are directly emitted by a source as a solid orliquid at stack

orrelease conditions and canbe captured onthe filter ofa stack
testtrain. "Fireplace" means all devices both masonry or factory built units (free standing fireplaces) with a hearth, fire chamber or similarly prepared device connected to a chimney which provides the operator with little control ofcombustion air, leavingits fire chamberfully orat leastpartially opentothe

room. Fireplaces include those devices with circulating systems, heat exchangers, or draft reducing doors with a net thermal efficiency of no greater than twenty percent and are used for aestheticpurposes. "Fugitive Dust" means particulate, composed ofsoil and/or industrial particulates such as ash, coal, minerals, etc., which becomes airborne because of wind or mechanical disturbance of surfaces. Natural sources ofdust and fugitive emissions are not fugitive dust within the meaning of this definition."Fugitive Emissions" means emissions from an installation or facility which are neither passed through an air cleaning device nor vented through a stack or could not reasonably pass through a stack, chimney, vent, or other functionally equivalent opening. "Garbage" means all putrescible animal and vegetable matter resulting from the handling, preparation, cooking and consumption offood, including wastes attendant thereto. "Gasoline" means any petroleum distillate, used as a fuel for internal combustion engines, having a Reid vapor pressureof4 poundsorgreater. "Hazardous Air Pollutant (HAP)" means any pollutant listed by the EPA as a hazardous air pollutant in conformance with Section 112(b) ofthe Clean Air Act. A list ofthese pollutantsis available atthe Division ofAirQuality. "Household Waste" means any solid or liquid material normally generated bythe family in a residence in the

course ofordinary day-to-day living, including but not limited
to garbage, paperproducts, rags, leaves and garden trash. "Incinerator" means a combustion apparatus designed for high temperature operation in which solid, semisolid, liquid, or gaseous combustible wastes are ignited and burned efficiently and from which the solid and gaseous residues contain little ornocombustiblematerial. "Installation" means a discrete process with identifiable emissions which may be part ofa larger industrial plant. Pollution equipment shall not be considered a separate installation orinstallations. "LPG" means liquified petroleum gas such as propaneorbutane. "Maintenance Area" means an area that is subject to the provisions of a maintenance plan that is included in the Utah state implementation plan, and that has been redesignated by EPA from nonattainment to attainment of any National AmbientAirQuality Standard. (a) The following areas are considered maintenance

areas for ozone: (i) SaltLake County, effective August 18, 1997; and (ii) DavisCounty, effective August 18, 1997. (b) The following areas are considered maintenance

areasfor carbonmonoxide: (i) SaltLake City, effective March22, 1999; (ii) OgdenCity, effective May 8, 2001; and (iii) ProvoCity, effectiveJanuary 3, 2006. (c) The following areas are considered maintenance

areasforPMIO: (i) Salt Lake County, effective onthe date that EPA
approves the maintenance plan that was adopted bythe Board

onJuly 6, 2005; and (ii) Utah County, effective on the date that EPA
approves the maintenance plan that was adopted by the Board

onJuly6, 2005; and (iii) Ogden City, effective on the date that EPA
approves the maintenance plan that was adopted by the Board

onJuly 6, 2005. (d) The following area is considered a maintenance

areafor sulfur dioxide: all ofSaltLake County andthe eastern portion ofTooeleCountyabove 5600 feet, effective onthe date that EPA approves the maintenance plan that was adopted by the BoardonJanuary 5, 2005. "Major Modification" means any physical change in

or change in the method ofoperation of a major source that would result in a significant net emissions increase of any pollutant. A net emissions increase that is significant for volatile organic compounds shall be considered significant for

ozone. Within Salt Lake and Davis Counties or any nonattainment area for ozone, a net emissions increase that is significant for nitrogen oxides shall be considered significant for ozone. Within areas of nonattainment for PMIO, a significant net emission increase for any PMIO precursor is also a significant net emission increase for PMIO. A physical changeorchange inthe method ofoperation shall notinclude: (1) routine maintenance, repairandreplacement; (2) use of an alternative fuel or raw material by

reason of an order under section 2(a) and (b) ofthe Energy Supply and Environmental Coordination Act of 1974, or by

reason ofa natural gas curtailment plan pursuant to the Federal PowerAct; (3) use ofan alternative fuel byreason ofan orderor rule undersection 125 ofthefederal CleanAirAct; (4) use of an alternative fuel at a steam generating unit tothe extentthat thefuel is generated from municipal solid waste; (5) use of an alternative fuel or raw material by a

source: (a) which the source was capable ofaccommodating before January 6, 1975, unless such change would be prohibited underany enforceablepermitcondition; or (b) whichthe source is otherwise approvedtouse;(6) an increase in the hours ofoperation or in the production rate unless such change would be prohibited under any enforceablepermitcondition; (7) anychange in ownership at a source (8) the addition, replacement or use ofa pollution control project at an existing electric utility steam generating unit, unless the director determines that such addition, replacement, or use renders the unit less environmentally beneficial, orexcept: (a) when the director has reason to believe that the pollution control project would result in a significant net increase in representative actual annual emissions of any criteria pollutant over levels used for that source in the most recent air quality impact analysis in the area conducted for the purpose ofTitleIofthe Clean AirAct, ifany, and (b) the director determines that the increase will

cause or contribute to a violation ofany national ambient air quality standard orPSD increment, orvisibility limitation. (9) the installation, operation, cessation, or removal of a temporary clean coal technology demonstration project, providedthattheprojectcomplies with: (a) the Utah State ImplementationPlan; and (b) other requirements necessary to attain and maintain the national ambient air quality standards during the projectand after itisterminated. "Major Source" means, to the extent provided by the federal CleanAirActas applicableto R307: (I) any stationary source of air pollutants which emits, orhas the potential to emit, one hundred tons peryear or

more ofany pollutant subjectto regulation under the Clean Air Act; or (a) any source located in a nonattainment area for carbon monoxide which emits, or has the potential to emit, carbon monoxide in the amounts outlined in Section 187 ofthe federal Clean Air Act with respect to the severity of the nonattainment area as outlined in Section 187 ofthe federal Clean AirAct; or (b) any source located in Salt Lake or Davis Counties or in a nonattainment area for ozone which emits, or has the potential to emit, 

## voe or nitrogen oxides in the
amounts outlined in Section 182 ofthe federal Clean Air Act with respect to the severity of the nonattainment area as outlined in Section 182 ofthe federal Clean AirAct; or (c) any source located in a nonattainment area for PMIO which emits, or has the potential to emit, PMIO or any PMIO precursor in the amounts outlined in Section 189 ofthe federal Clean Air Act with respect to the severity of the nonattainment area as outlined in Section 189 of the federal Clean AirAct. (2) any physical change that would occur at a source not qualifying under subpart I as a major source, ifthe change would constitute amajor source by itself; (3) the fugitive emissions and fugitive dust of a stationary source shall not be included in determining for any of the purposes of these R307 rules whether it is a major stationary source, unless the source belongs to one of the following categories ofstationary sources: (a) Coal cleaning plants (with thermal dryers); (b) Kraftpulp mills; (c) Portland cementplants; (d) Primary zinc smelters; (e) Iron and steel mills; (t) Primary aluminum orreduction plants; (g) Primary copper smelters; (h) Municipal incinerators capable ofcharging more than 250 tons ofrefuse perday; (i) Hydrofluoric, sulfuric, ornitric acid plants; G) Petroleumrefineries; (k) Lime plants; (1) Phosphaterockprocessingplants; (m) Coke oven batteries; (n) Sulfurrecoveryplants; (o) Carbon blackplants (furnace process); (p) Primary lead smelters; (q) Fuel conversion plants; (r) Sinteringplants; (s) Secondarymetal productionplants; (t) Chemical processplants; (u) Fossil-fuel boilers (or combination thereof) totaling more than 250 million British Thermal Units per hour heat input; (v) Petroleum storage and transfer units with a total storage capacityexceeding300,000barrels; (w) Taconite ore processing plants; (x) Glass fiberprocessingplants; (y) Charcoalproduction plants; (z) Fossil fuel-fired steam electric plants of more than 250 million BritishThermal Units perhourheat input; (aa) Any other stationary source category which, as ofAugust 7, 1980, is being regulated under section 111 or 112 ofthefederal CleanAirAct. "Modification" means any planned change in a

source which results in apotential increase ofemission. "National Ambient Air Quality Standards (NAAQS)"

means the allowable concentrations of air pollutants in the ambient air specified by the Federal Government (Title 40, Code ofFederal Regulations, Part 50). "Net Emissions Increase" means the amount by which the sum ofthe following exceedszero: (I) any increase in actual emissions from aparticular physical change or change in method ofoperation at a source; and (2) any other increases and decreases in actual emissions at the source that are contemporaneous with the particularchange and are otherwise creditable. Forpurposes of determining a "netemissions increase": (a) An increase or decrease in actual emissions is contemporaneous with the increase from the particular change only ifit occursbetween the date five years before construction

on the particular change commences; and the date that the increase fromthe particularchange occurs. (b) An increase or decrease in actual emissions is creditable only if it has not been relied on in issuing a prior approval for the source which approval is in effect when the increase in actual emissions for theparticularchange occurs. (c) An increase or decrease in actual emission of sulfur dioxide, nitrogen oxides or particulate matter which

occurs before an applicable minor source baseline date iscreditable only ifit is required to be considered in calculating the amount of maximum allowable increases remaining available. With respect to particulate matter, only PMlO emissionswill be usedto evaluatethis increase ordecrease. (d) An increase in actual emissions is creditable only
to the extent that the new level ofactual emissions exceeds the old level. (e) A decrease in actual emissions is creditable only
to the extentthat: (i) The old level ofactual emissions or the old level of allowable emissions, whichever is lower, exceeds the new level ofactual emissions; (ii) It is enforceable at and after the time that actual construction onthe particularchange begins; and (iii) It has approximately the same qualitative significance for public health and welfare as that attributed to the increasefrom theparticularchange. (iv) Ithas not been relied on in issuing any permit under R307-401 nor has it been relied on in demonstrating attainment orreasonablefurther progress. (t) 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,
notto exceed 180 days. ''New Installation" means an installation, construction of which began after the effective date of any regulation having application to it. ''Nonattainment Area" means an area designated by the Environmental Protection Agency as nonattainment under Section 107, Clean Air Act for any National Ambient Air Quality Standard. The designations for 

### Utah are listed in 40 CFR81.345. "Offset" means an amount ofemission reduction, by

a source, greater than the emission limitation imposed on such

source by these regulations and/or the State Implementation Plan. "Opacity" means the capacity to obstruct the transmission oflight, expressed as percent. "Open Burning" means any burning ofcombustible materials resulting in emission ofproducts ofcombustion into ambient airwithoutpassagethrough achimney or stack. "Owner or Operator" means any person who owns, leases, controls, operates or supervises a facility, an emission
source, or airpollution control equipment. "PSD" Area means an area designated as attainment

or unclassifiable under section 107(d)(l)(D) or (E) of the federal Clean AirAct. "PM2.5" means particulate matter with an aerodynamic diameter less than or equal to a nominal 2.5 micrometers as measured by an EPA reference or equivalent method. "PM2.5 Precursor" means any chemical compound

or substance which, after it has been emitted into the atmosphere, undergoes chemical or physical changes that
convert it into particulate matter, specifically PM2.5, and has been identified in the applicable implementation plan for PM2.5 as significant for the purpose of developing control measures. Specifically, PM2.5 precursors include S02, NOx, and

### voe."PMlO" means particulate matter with an aerodynamic diameter less than or equal to a nominal 10 micrometers as measured by an EPA reference or equivalent method. "PM10 Precursor" means any chemical compound or substance which, after it has been emitted into the atmosphere, undergoes chemical or physical changes that convert it into particulate matter, specificallyPMlO. "Part 70 Source" means any source subject to the permittingrequirements ofR307-415. "Person" means an individual, trust, firm, estate, company, corporation, partnership, association, state, state or federal agency orentity, municipality, commission, or political subdivision ofa state. (Subsection 19-2-103(4)). "Pollution Control Project" means any activity or project at an existing electric utility steam generating unit for purposes ofreducing emissions from such unit. Such activities

orprojects are limited to: (1) The installation of conventional or innovative pollution control technology, including but not limited to advanced flue gas desulfurization, sorbent injection for sulfur dioxide and nitrogen oxides controls and electrostatic precipitators; (2) An activity orproject to accommodate switching
to a fuel which is less polluting than the fuel used prior to the activity or project, including, but not limited to natural gas or coal reburning, orthe cofiring ofnatural gas and otherfuels for the purpose ofcontrolling emissions; (3) A permanent clean coal technology demonstration project conducted under Title II, sec. lOl(d) of the Further Continuing Appropriations Act of 1985 (sec. 5903(d) oftitle 42 ofthe United States Code), or subsequent appropriations, up to a total amount of $2,500,000,000 for commercial demonstration ofclean coal technology, or similar projects funded through appropriations for the Environmental ProtectionAgency; or (4) A permanent clean coal technology demonstrationprojectthatconstitutes arepoweringproject. "Potential to Emit" meansthemaximum capacity ofa

source to emit a pollutant under its physical and operational design. Any physical or operational limitation on the capacity ofthe source to emit a pollutant including air pollution control equipment and restrictions on hours ofoperation oron the type

or amount ofmaterial combusted, stored, or processed shall be treated as part of its design if the limitation or the effect it would have on emissions is enforceable. Secondary emissions do not count in determining the potential to emit ofa stationary

source. "Primary PM2.5" means the sum offilterable PM2.5 and condensable PM2.5. "Process Level" means the operation of a source, specific to the kind or type offuel, input material, or mode of operation."Process Rate" means the quantity perunit oftime of any raw material or process intermediate consumed, orproduct generated, through the use ofany equipment, source operation,

orcontrol apparatus. For a stationary internal combustion unit

### .-----------------------------------------------

or any other fuel burning equipment, this term may be expressed asthequantityoffuel burnedperunitoftime. "Reactivation of a Very Clean Coal-Fired Electric Utility Steam Generating Unit" means any physical change or change in the method of operation associated with the
commencementofcommercial operationsby a coal-fired utility unit aftera period ofdiscontinued operation wherethe unit: (I) Has notbeen in operation forthe two-yearperiod prior to the enactment ofthe Clean Air Act Amendments of 1990, and the emissions from such unit continue to be carried inthe emission inventory atthetime ofenactment; (2) Was equipped prior to shutdown with a continuous system ofemissions control that achieves a removal efficiency for sulfur dioxide ofno less than 85 percent and a removal efficiency for particulates ofno lessthan 98 percent; (3) Is equipped with low-NOx burners prior to the time of commencement of operations following reactivation; and (4) Is otherwise in compliancewith therequirements ofthe CleanAirAct. "Reasonable Further Progress" means annual incremental reductions in emission ofan airpollutant which are sufficient to provide for attainment ofthe NAAQS by the date identified in the StateImplementationPlan. "Refuse" means solid wastes, such as garbage and trash. "Regulated airpollutant" means any ofthe following: (a) Nitrogen oxides or any volatile organic compound; (b) Any pollutant for which a national ambient air quality standardhas beenpromulgated; (c) Any pollutant that is subject to any standard promulgated under Section 111 of the Act, Standards of PerformanceforNew Stationary Sources; (d) Any Class I orII substance subject to a standard promulgated under or established by Title VI of the Act, Stratospheric OzoneProtection; (e) Any pollutant subject to a standard promulgated under Section 112, Hazardous Air Pollutants, or other requirements established under Section 112 of the Act, including Sections l 12(g), 

### G), and (r) ofthe Act, including any ofthe following: (i) Any pollutant subject to requirements under Section l 12(j) ofthe Act, Equivalent Emission Limitation by Permit. Ifthe Administrator fails to promulgate a standard by the date established pursuantto Section 112(e) ofthe Act, any pollutant for which a subject source would be major shall be considered to be regulated on the date 18 months after the applicable date established pursuant to Section l 12(e) ofthe Act; (ii) Any pollutant for which the requirements of Section l 12(g)(2) ofthe Act (Construction, Reconstruction and Modification) have been met, but only with respect to the individual source subjectto Section l 12(g)(2)requirement. "Repowering" means replacement of an existing coal-fired boiler with one of the following clean coal technologies: atmospheric or pressurized fluidized bed combustion, integrated gasification combined cycle, magnetohydrodynamics, direct and indirect coal-fired turbines, integrated gasification fuel cells, or as determined by the Administrator, in consultation with the Secretary ofEnergy, a derivative ofone or more ofthese technologies, and any other technology capable of controlling multiple combustion emissions simultaneously with improved boiler or generation efficiency and with significantly greater waste reduction relative to the performance of technology in widespread commercialuse as ofNovember 15, 1990. (I) Repowering shall also include any oil and/orgasfired unit which has been awarded clean coal technology demonstration funding as of January l, 1991, by the DepartmentofEnergy. (2) The director shall give expedited consideration
to permit applications for any source that satisfies the requirements of this definition and is granted an extension undersection409 ofthe CleanAirAct. "RepresentativeActual AnnualEmissions" meansthe average rate, in tons per year, at which the source is projected
to emit a pollutant for the two-year period after a physical change or change in the method of operation of unit, (or a different consecutive two-yearperiod within IO years afterthat change, where the director determines that such period is more representative ofsource operations), considering the effect any such change will have on increasing or decreasing the hourly emissions rate and on projected capacity utilization. In projectingfuture emissionsthe director shall: (l) Consider all relevant information, including but
not limited to, historical operational data, the company's own representations, filings with the State of Federal regulatory authorities, and compliance plans under title IV ofthe Clean AirAct; and (2) Exclude, in calculating any increase in emissions thatresults from the particularphysical change orchange in the method ofoperation at an electric utility steam generating unit, that portion ofthe unit's emissions following the change that could have been accommodated during the representative baseline period and is attributable to an increase in projected capacity utilization at the unit that is unrelated to the particular change, including any increased utilization due to the rate of electricitydemand growth forthe utility system as a whole. "Residence" means a dwelling in which people live, including all ancillarybuildings. "Residential Solid Fuel Burning" device means any residential burning device except a fireplace connected to a chimney that bums solid fuel and is capable of, and intended for use as a space heater, domestic water heater, or indoor cooking appliance, and has an air-to-fuel ratio less than 35-to-l

as determined by the test procedures prescribed in 40 CFR 60.534. Itmust also have a useable firebox volume oflessthan 6.10 cubic meters or 20 cubic feet, a minimum bum rate less than 5 kilograms per houror 11 poundsperhour as determined bytest proceduresprescribed in 40 CFR60.534, and weigh less than 800 kilograms or 362.9 pounds. Appliances that are described as prefabricated fireplaces and are designed to accommodate doors or other accessories that would create the air starved operating conditions of a residential solid fuel burning device shall be considered as such. Fireplaces are not includedin this definition for solidfuel burning devices. "Road" means any public orprivateroad."Salvage Operation" means any business, trade or industry engaged 

### in whole or in part in salvaging orreclaiming any product or material, including but not limited to metals, chemicals, shipping containers ordrums. "Secondary Emissions" means emissions which would occur as a result ofthe construction or operation ofa major source or major modification, but do not come from the major source ormajormodification itself. Secondary emissions must be specific, well defined, quantifiable, and impactthe same general area as the source or modification which causesthe secondary emissions. Secondary emissions include emissions from any off-site support facility which would not be constructed or increase its emissions except as a result ofthe construction or operation ofthe major

source or major modification. Secondary emissions do not include any emissions which come directly from a mobile

source such as emissions from the tailpipe ofa motor vehicle, from atrain, orfrom avessel. Fugitive emissions and fugitive dust from the source

ormodification are not considered secondaryemissions. "Secondary PM2.5" means particles that form or grow in mass through chemical reactions in the ambient air well after dilution and condensation have occurred. Secondary PM2.5 is usually formed at some distance downwind from the

source. "Significant" means: (1) In reference to a net emissions increase or the potential ofa source to emit any ofthe following pollutants, a rate of emissions that would equal or exceed any of the following rates: Carbon monoxide: 100ton peryear (tpy); Nitrogen oxides: 40 tpy; Sulfurdioxide: 40 tpy; PMlO: 15 tpy; PM2.5: 10tpy; Particulate matter: 25 tpy; Ozone: 40 tpy ofvolatile organic compounds; Lead: 0.6 tpy. "Solid Fuel" means wood, coal, and other similar organic material orcombination ofthese materials. "Solvent" means organic materials which are liquid
at standard conditions (Standard Temperature and Pressure) and which are used as dissolvers, viscosity reducers, or cleaning agents. "Source" means any structure, building, facility, or installation which emits ormay emit any airpollutant subjectto regulation underthe Clean AirAct and which is located on one

or more continuous or adjacent properties and which is under the control of the same person or persons under common control. A building, structure, facility, or installation means all ofthe pollutant-emitting activities which belong to the same industrial grouping. Pollutant-emitting activities shall be considered as part of the same industrial grouping if they belong to the same "Major Group" (i.e. which have the same two-digit code) as described in the Standard Industrial Classification Manual, 1972, as amended by the 1977 Supplement (US Government Printing Office stock numbers 4101-0065 and 003-005-00176-0, respectively). "Stack" means any point in a source designed to emit solids, liquids, or gases into the air, including apipe orduct but
not including flares. "Standards of Performance for New Stationary Sources" means the Federally established requirements for performance and record keeping (Title 40 Code of Federal Regulations, Part 60). "State" means Utah State. "Temporary" means not more than 180 calendar days. "Temporary Clean Coal Technology Demonstration Project" means a clean coal technology demonstration project that is operated for a period of 5 years or less, and which complies with the Utah State Implementation Plan and other requirements necessary to attain and maintain the national ambient air quality standards during the project and after it is terminated. "Threshold Limit Value

- Ceiling (TLV-C)" means the airborne concentration of a substance which may not be exceeded, as adopted by the American Conference of Governmental Industrial Hygienists in its "Threshold Limit Values for Chemical Substances and Physical Agents and Biological Exposure Indices, (2009)." "Threshold Limit Value

- Time Weighted Average (TLV-TWA)" means the time-weighted airborne concentration of a substance adopted by the American Conference of Governmental Industrial Hygienists in its "Threshold Limit Values for Chemical Substances and Physical Agents and Biological Exposure Indices, (2009)." "Total Suspended Particulate (TSP)" means minute separateparticles ofmatter, collectedbyhigh volume sampler. "Toxic Screening Level" means an ambient concentration ofan air contaminant equal to a threshold limit value

- ceiling (TLV- C) or threshold limit value -time weighted average (TLV-TWA) divided by a safetyfactor. "Trash" means solids not considered to be highly flammable or explosive including, but not limited to clothing, rags, leather, plastic, rubber, floor coverings, excelsior, tree leaves, yard trimmings and othersimilarmaterials. "Volatile Organic Compound (VOC)" means VOC

as defined in 40 CFR 51.IOO(s), effective as of the date referenced in R307-101-3, is hereby adopted and incorporated byreference. "Waste" means all solid, liquid or gaseous material, including, but not limited to, garbage, trash, household refuse, construction or demolition debris, or otherrefuse including that resulting from the prosecution of any business, trade or industry. "Zero Drift" means the change in the instrument
meterreadout overa stated period oftime ofnormal continuous operation when the 

## voe concentration at the time of
measurement is zero.



### KEY: airpollution, definitions Date of Enactment or Last Substantive Amendment: February 1, 2013 Notice ofContinuation: July2, 2009 Authorizing, and Implemented or Interpreted Law: 19-2- 104(1)(a)