5 Colo. Code Regs. § 1001-2-I
Emission control regulations adopted by the Air Quality Control Commission apply throughout Colorado unless otherwise stipulated. The Statement of Intent, Definitions, and General Provisions of this regulation apply to all emission control regulations adopted by the Commission unless otherwise stipulated.
Pursuant to Colorado Revised Statutes § 24-4-103 (12.5), copies of materials incorporated by reference are available for public inspection during regular business hours, or copies may be obtained at a reasonable cost from the Technical Secretary of the Air Quality Control Commission (the Commission), located at 4300 Cherry Creek Drive South, Denver, Colorado 80246-1530. Materials incorporated by reference may also be available through the United States Government Printing Office, online at www.govinfo.gov. Materials incorporated by reference are those editions in existence as of the date of this regulation as promulgated or revised by the Commission and references do not include later amendments to or editions of the incorporated materials.
Colorado Revised Statutes § 25-7-109 provides: As promptly as possible, the Commission shall adopt and promulgate, and from time to time modify or repeal emission control regulations which require the use of effective practical air pollution controls. Colorado Revised Statutes §§ 25-7-105 through 25-7-110, § 25-7-114 and § 25-7-117 are the general statutory authority for adoption by the Commission of standards, regulations, and programs.
In order to foster the health, welfare, convenience, and comfort of the inhabitants of the state of Colorado and to facilitate the enjoyment and use of the scenic and natural resources of the state, it is declared to be the policy of this state to achieve the maximum practical degree of air purity in every portion of the state, to attain and maintain the National Ambient Air Quality Standards, and to prevent the significant deterioration of air quality in those portions of the state where the air quality is better than the National Ambient Air Quality Standards.
To that end, it is the purpose of this article to require the use of all available practical methods that are technologically feasible and economically reasonable so as to reduce, prevent, and control air pollution throughout the state of Colorado; to require the development of an air quality control program in which the benefits of the air pollution control measures utilized bear a reasonable relationship to the economic, environmental, and energy impacts and other costs of such measures; and to maintain a cooperative program between the state and local units of government. It is further declared that the prevention, abatement, and control of air pollution in each portion of the state are matters of statewide concern and are affected with a public interest and that the provisions of this article are enacted in the exercise of the police powers of this state for the purpose of protecting the health, peace, safety, and general welfare of the people of this state.
The General Assembly further recognizes that a current and accurate inventory of actual emissions of air pollutants from all sources is essential for the proper identification and designation of attainment and nonattainment areas, the determination of the most cost effective regulatory strategy to reduce pollution, the targeting of regulatory efforts to achieve the greatest health and environmental benefits, and the achievement of a federally approved clean air program. In order to achieve the most accurate inventory of air pollution sources possible, this article specifically provides incentives to achieve the most accurate and complete inventory possible, and to provide for the most accurate enforcement program achievable based upon that inventory.
To implement the legislative declaration and other sections of the Act, the Commission declares that it is the intent and purpose of these regulations is to:
The Commission recognizes that the growth in the amount and complexity of air pollution in Colorado is brought about by, and incident to, population growth, mobility, increased affluence, industrial development and changing social values in said state.
The Commission believes that the air pollution problem is likely to be aggravated and compounded by additional population growth, mobility, affluence, industrial development, and changing social values in the future, that are likely to result in serious potential danger to the public and the environment. Therefore, the Commission intends to pursue solutions, in conjunction with other appropriate agencies and interests that have a direct interest and capability in solving a growing air pollution problem(s) in relation to the broader environmental degradation problem. It is the intent of the Commission to coordinate with industrial, commercial, agricultural, and transportation planning organizations, land use, and other environmental organizations, the public, the legislature, educational organizations, and other major interests in such a manner as to prevent air pollution in Colorado.
Abbreviations used in the Commission's regulations have the following meaning:
ASTM | American Society For Testing And Materials |
APEN | Air Pollutant Emission Notice |
AQCR | Air Quality Control Region |
AQRV | Air Quality Related Value |
BACT | Best Available Control Technology |
BART | Best Available Retrofit Technology |
BTU | British Thermal Unit |
°C | Degree Celsius (Centigrade) |
cal | Calorie |
CAS | Chemical Abstract Service |
CCR | Code Of Colorado Regulations |
CdS | Cadmium Sulfide |
Cfm | Cubic Feet Per Minute |
CFR | Code Of Federal Regulations |
CO | Carbon Monoxide |
CO2 | Carbon Dioxide |
CO2e | Carbon Dioxide Equivalent |
CEM | Continuous Emission Monitoring |
COM | Continuous Opacity Monitoring |
C.R.S. | Colorado Revised Statutes |
dscm | Dry Cubic Meter(s) At Standard Conditions |
dscf | Dry Cubic Feet At Standard Conditions |
U.S. EPA | United States Environmental Protection Agency |
ERC | Emission Reduction Credit |
eq | Equivalence |
°F | Degree Fahrenheit |
FLM | Federal Land Manager |
Fed. Reg. | Federal Register |
FS | Forest Service |
ft | Feet |
g | Gram(s) |
GACT | Generally Available Control Technology |
gal | Gallon(s) |
GHG | Greenhouse Gas |
g eq | Gram Equivalent |
GEP | Good Engineering Practice |
gr | Grain(s) |
hr | Hour(s) |
HAP(s) | Hazardous Air Pollutant(s) |
HC | Hydrocarbons |
HCl | Hydrochloric Acid |
Hg | Mercury |
H2O | Water |
H2S | Hydrogen Sulfide |
H2SO4 | Sulfuric Acid |
hz | Hertz |
in | Inch(s) |
J | Joule |
°K | Degree Kelvin |
kg | Kilogram(s) |
LAER | Lowest Achievable Emission Rate |
l | Liter(s) |
lpm | Liter(s) Per Minute |
lb | Pound(s) |
LTS | Long Term Strategy For Visibility Protection |
m | Meter(s) |
MACT | Maximum Achievable Control Technology |
m eq | Milli Equivalent(s) |
min | Minute(s) |
mg | Milligram(s) |
ml | Milliliter(s) |
mm | Millimeter(s) |
mol | Mole |
mol. wt. | Molecular Weight |
mV | Millivolt |
N | Newton |
NA(s) | Nonattainment Area(s) |
NAAQS | National Ambient Air Quality Standards |
NESHAP | National Emission Standards For Hazardous Air Pollutants |
N2 | Nitrogen |
Ng | Nanogram (10-9 Grams) |
NPS | National Park Service |
NO | Nitric Oxide |
NO2 | Nitrogen Dioxide |
NOx | Nitrogen Oxides |
NRVOC(s) | Negligibly Reactive Volatile Organic Compound(s) |
NSPS | New Source Performance Standards |
NSR | New Source Review |
O | Ohm |
O2 | Oxygen |
Pa | Pascal |
PM | Particulate Matter |
PM10 | Particulate Matter With Diameter Of 10 Microns Or Less |
PM2.5 | Particulate Matter With Diameter Of 2.5 Microns Or Less |
ppb | Parts Per Billion |
ppm | Parts Per Million |
PSD | Prevention Of Significant Deterioration |
psia | Pounds Per Square Inch Absolute |
psig | Pounds Per Square Inch Gauge |
PTE | Potential To Emit |
RACT | Reasonably Available Control Technology |
°R | Degree Rankine |
RFP | Reasonable Further Progress |
Sec | Second |
SIP | State Implementation Plan |
SO2 | Sulfur Dioxide |
SO3 | Sulfur Trioxide |
SOx | Sulfur Oxides |
STP | Standard Temperature And Pressure |
TPY | Tons Per Year |
TSP | Total Suspended Particulates |
Mg | Microgram(s) (10-6 Gram) |
USC | United States Code |
VAC | Volts Alternating Current |
VDC | Volts Direct Current |
V | Volt |
VOC | Volatile Organic Compound |
W | Watt |
The following words and phrases shall have the following meanings unless the context in which they are used requires specific meaning within separate Commission regulations. In those instances, words and phrases shall be defined in the appropriate regulation.
ABSOLUTE VAPOR PRESSURE
The pressure relative to an absolute vacuum that a confined vapor exerts at a given temperature when in equilibrium with its solid or liquid state.
ACT
The "Colorado Air Pollution and Prevention Control Act". Colorado Revised Statutes Title 25, Article 7.
AIR POLLUTANT
Any fume, smoke, particulate matter, vapor, gas, or any combination thereof that is emitted into or otherwise enters the atmosphere, including, but not limited to, any physical, chemical, biological, radioactive (including source material, special nuclear material, and by-product materials) substance or matter, but not including water vapor or steam condensate or any other emission exempted by the Commission consistent with the Federal Act. Such term includes any precursors to the formation of any air pollutant, to the extent the administrator of the U.S. EPA or the Commission has identified such precursor(s) for the particular purpose for which the term "air pollutant" is used.
AIR POLLUTION
Any concentration of one or more air pollutants in the ambient air that has caused, is causing, or if unabated, may cause injury to human, plant, or animal life, or injury to property, or which unreasonably interferes with the comfortable enjoyment of life or property or with the conduct of business.
AIR POLLUTION CONTROL AUTHORITY
The Division or any person or agency given authority by the Division or a local government unit duly authorized with respect to air pollution control.
ALTERNATIVE METHOD
Any method of sampling and analysis for an air pollutant that is not a reference or equivalent method, but has been approved by the Division.
AMBIENT AIR
That portion of the atmosphere, external to the source, to which the general public has access.
AREA CLASSIFICATION
The Commission and the U.S. EPA have designated the entire state into attainment, nonattainment or unclassifiable areas.
ASPHALT CONCRETE PLANT
Any facility used to manufacture asphalt concrete by heating and drying aggregate and mixing with asphalt compounds.
ASPHALT PAVING MATERIAL
A petroleum based asphaltic compound used in the preparation of asphalt concrete for application to roads, highways, and streets.
ATMOSPHERE
The surrounding or outside air i.e. external to buildings. Emissions of air pollutants from a building or structure not specifically designed to control pollutant emissions from sources within such building or structure shall constitute an emission into the ambient air or atmosphere.
ATTAINMENT AREA
Any area within Colorado designated by the Commission and approved by the U.S. EPA in which the ambient air concentrations of any designated pollutants are less than that specified in the National Ambient Air Quality Standards.
BULK PLANT
A petroleum distillate storage and distribution facility that has an average daily throughput of 76,000 liters (20,000 gallons) or less which is loaded directly into delivery vehicles. (As used herein, "bulk plant" does not include service stations or a separate operation within a petroleum distribution facility that pumps only into fuel tanks fueling motor vehicles and trucks.)
CAPACITY FACTOR
The ratio of average load to the capacity rating of the machine or equipment for the specified period of time.
CAPTURE SYSTEM
The equipment, including hoods, ducts, fans, dampers, etc., used to capture or transport air pollutants.
CARBON DIOXIDE EQUIVALENT
A metric used to compare the emissions from various GHGs based upon their global warming potential (GWP). CO2e is determined by multiplying the mass amount of emissions (tons per year), for each GHG constituent by that gas's GWP, and summing the resultant values to determine CO2e (tons per year). The applicable GWPs codified in 40 CFR Part 98, Subpart A, Table A-1 - Global Warming Potentials are hereby incorporated by reference as in effect as of December 11, 2014, but not including later amendments.
CLAUS SULFUR RECOVERY PLANT
A process unit that recovers sulfur from hydrogen sulfide by a vapor-phase catalytic reaction involving sulfur dioxide and hydrogen sulfide.
COAL
All solid fossil fuels classified as anthracite, bituminous, sub-bituminous, or lignite by the appropriate American Society for Testing and Materials method.
COAL PREPARATION PLANT
Any facility (excluding underground mining operations), which prepares coal by one or more of the following processes: breaking, wet or dry cleaning, crushing, screening, and thermal drying.
COAL PROCESSING AND CONVEYING EQUIPMENT
Any machinery used to reduce the size of coal or to separate coal from refuse; the equipment used to convey coal or to remove coal from refuse; the equipment used to convey coal or to remove coal and refuse from the machinery including, but not limited to, breakers, crushers, screens, and conveyor belts.
COAL REFUSE
Waste products of coal mining, cleaning, and preparation.
COAL STORAGE SYSTEM
Any facility used to store coal except for open storage areas.
COMMISSION
The Air Quality Control Commission created by Colorado Revised Statutes § 25-7-104.
CONDENSATE
Hydrocarbon liquids that remain liquid at standard conditions (68 degrees Fahrenheit and 29.92 inches Mercury) and are formed by condensation from, or produced with, natural gas, and which have an American Petroleum Institute gravity ("API gravity") of 40 degrees or greater.
CONSTRUCTION
Except as listed or unless defined differently for a specific regulation, construction means the fabrication, erection, installation, or modification of an air pollution source. For Prevention of Significant Deterioration and New Source Review purposes, construction means any physical change or change in the method of operation (including, but not limited to, fabrication, erection, installation, demolition, or modification of an emissions unit) which would result in a change in actual emissions.
CONTINUOUS MONITORING SYSTEM
A comprehensive term that may include, but is not limited to, continuous emission monitoring systems, continuous opacity monitoring systems, continuous parameter monitoring systems, or other manual or automatic monitoring that is used for demonstrating compliance with an applicable regulation on a continuous basis as defined by the regulation.
CONTROL DEVICE (STATIONARY)
The air pollution control equipment used to remove air pollutants generated by a stationary source.
CONTROL DEVICE (MOBILE)
Air pollution control equipment used to remove air pollutants generated by mobile sources.
CRUDE OIL
Raw petroleum as it comes from the well, as pyrolyzed from kerogen, processed from tires, or recovered from other processes.
CYCLONIC FLOW
Spiraling movements of exhaust gases within a duct or stack.
DAY
A single twenty-four hour period from midnight to midnight or other twenty-four hour period as approved by the Division on a case-by-case basis.
DEPARTMENT
The Colorado Department of Public Health and Environment.
DEPARTMENT OF REVENUE
The Colorado Department of Revenue.
DESIGNATED REPRESENTATIVE
A responsible natural person authorized by the owners and operators of an affected source and of all affected units at the source, as evidenced by a certificate of representation submitted in accordance with Subpart B of Code of Federal Regulations, Title 40, Part 72 (October 19, 2007), to represent and legally bind each owner and operator, as a matter of law, in matters pertaining to the acid rain program. Whenever the term responsible official is used, it shall be deemed to refer to the designated representative with regard to all matters under the acid rain program.
DIRECT PM2.5 EMISSIONS
Solid particles emitted directly from an air emissions source or activity, or gaseous emissions or liquid droplets from an air emissions source or activity which condense to form particulate matter at ambient temperatures. Direct PM2.5 emissions include elemental carbon, directly emitted organic carbon, directly emitted sulfate, directly emitted nitrate, and other inorganic particles (including but not limited to crustal material, metals, and sea salt).
DIVISION
The Air Pollution Control Division of the Colorado Department of Public Health and Environment except where specifically designated as the Division of Administration of the Colorado Department of Public Health and Environment.
DUST HANDLING EQUIPMENT
Any equipment used to transport, convey, or otherwise handle particulate matter that has been collected by an air pollution control device.
EMERGENCY POWER GENERATOR
A generator whose sole function is to provide back-up power when electric power is interrupted. Periodic testing of these generators and associated control and switching systems to insure that they are properly functioning will not prevent such a generator from being designated an emergency power generator.
EMISSION
The discharge or release into the atmosphere (ambient air) of one or more air pollutants.
EMISSION CONTROL REGULATION
Any standard promulgated by regulation that is applicable to all air pollutant sources within a specified area and that prohibits or establishes permissible limits for specific types of emissions in such areas. Also any regulation that by its terms is applicable to a specified type of facility, process, or activity for the purpose of controlling the extent, degree, or nature of pollutants emitted from such type of facility, process, or activity, any regulation adopted for the purpose of minimizing or preventing the emission of any air pollutant in potentially dangerous quantities, and also any regulation that adopts any design, equipment, work practice, or operational standard. Emission control regulations shall not include standards which describe maximum ambient air concentrations of specifically identified pollutants or which describe varying degrees of pollution of ambient air. Emission control regulations pertaining to hazardous air pollutants shall be consistent with the emission standards promulgated under Section 112 of the Federal Act or Colorado Revised Statutes § 25-7-109.3 of the Colorado Act in preventing or reducing emissions of hazardous air pollutants, and may include application of measures, processes, methods, systems, or techniques, including, but not limited to, measures that:
EMISSION STANDARD
See Standard of Performance.
EMISSIONS UNIT
Any part or activity of a stationary source that emits or has the potential to emit any air pollutant regulated under the state or Federal Acts. This term is not meant to alter or affect the definition of the term "unit" for purposes of Title IV (acid deposition control) of the federal act, or of the term "source" for purposes of the Air Pollutant Emission Notice requirements of Regulation Number 3, Part A, Section II.B.3.
ENFORCEABLE
Means all requirements contained in any permit issued in accordance with Regulation Number 3 and all regulatory requirements promulgated by the Commission, the state Act, consent decrees, and any requirements that are federally enforceable.
EQUIVALENT METHOD OF SAMPLING AND ANALYSIS
Any method of sampling and analysis of an air pollutant that has been demonstrated to the Division's satisfaction as having a consistent and quantitatively known relationship to a reference test method.
EXCAVATION
The removal of surface material, that may or may not be replaced, for the purpose of constructing or installing a structure or piece of equipment.
EXCESS EMISSION
Emissions of an air pollutant in excess of a performance standard promulgated by the Commission.
FEDERAL ACT
The Federal "Clean Air Act", 42 U.S.C. Section 7401 et seq.
FEDERALLY ENFORCEABLE
Means all limitations and conditions which are enforceable by the U.S. EPA Administrator, including, but not limited to, those in the most recent edition of:
FIXED CAPITAL COST
The capital needed to provide all the depreciable components.
FOSSIL FUEL
Natural gas, petroleum, coal, and any form of solid, liquid, or gaseous fuel derived from such materials.
FOSSIL FUEL AND/OR WOOD RESIDUE FIRED STEAM GENERATING UNIT
A furnace or boiler burning a fossil fuel and/or wood residue and producing steam by heat transfer.
FOUNDRY
A facility engaged in the melting or casting of metals or alloys.
FUEL BURNING EQUIPMENT
Any furnace, boiler, or other equipment and appurtenances thereto, burning fuel solely for the purpose of producing heat, but not including:
FUGITIVE EMISSIONS
Emissions that could not reasonably pass through a stack, chimney, vent or other functionally equivalent opening.
GREENHOUSE GAS
Means the aggregate group of the following six greenhouse gases: carbon dioxide (CO2), nitrous oxide (N2O), methane (CH4), hydrofluorcarbons (HFCs), perfluorcarbons (PFCs), and sulfur hexafluoride (SF6). These gases are treated in aggregate based on the total carbon dioxide equivalent (CO2e) of each gas as the pollutant GHG. See definition for carbon dioxide equivalent (CO2e).
GRADING
The movement of soil for the purpose of establishing grade and drainage.
HAUL ROADS
Roads that are used for commercial, industrial or governmental hauling of materials and which the general public does not have a right to use.
HAZARDOUS AIR POLLUTANT (HAP)
An air pollutant that presents through inhalation or other routes of exposure, a threat of adverse human health effects (including, but not limited to, substances that are known to be, or may reasonably be anticipated to be carcinogenic, mutagenic, teratogenic, neurotoxic, that cause reproductive dysfunction, or that are acutely or chronically toxic) or adverse environmental effects whether through ambient concentrations, bioaccumulation, deposition, or otherwise and that has been listed pursuant to Section 112 of the Federal Act (1990), or § 25-7-109.3 of the state Act (2022).
HIGHLY VOLATILE ORGANIC COMPOUND
A volatile organic compound or mixture of such compounds with a vapor pressure in excess of 570 torr (11 pounds per square inch absolute (psia)) at 20 degrees Celsius or 68 degrees Fahrenheit.
HIGH TERRAIN
Any area having an elevation of nine hundred feet or more above the base of the stack of the source.
HOURLY PERIOD
Any sixty-minute period.
HYDROCARBON (HC)
An organic compound consisting only of carbon and hydrogen.
INCINERATOR
Any equipment, device, or contrivance used for the destruction of solids, liquids or gaseous wastes by burning. Excludes devices commonly called wigwam waste burners used exclusively to burn wood wastes and incinerating toilet waste. Excludes devices commonly called Air Curtain Destructors used exclusively to burn 100% wood waste, clean lumber, or yard waste generated as a result of projects to reduce the risk of wildfire and is not operated at a commercial or industrial facility. Any Air Curtain Destructor subject to 40 CFR Part 60 (July 1, 2022) incinerator requirements is considered an incinerator.
INDIAN GOVERNING BODY
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
Any federally recognized reservation established by Treaty, Agreement, Executive Order, or Act of Congress.
INTERMITTENT SOURCES
Those stationary sources of air pollution that do not operate on a continuous basis for a period of time sufficient to allow for opacity observations in accordance with U. S. EPA Method 9 (2017).
ISOKINETIC SAMPLING
Sampling in which the linear velocity of the gas entering the sampling nozzle is equal to that of the undisturbed gas stream at the sample point.
LEAD (PB)
Elemental lead, lead containing alloys and compounds of lead.
LOW TERRAIN
Any area other than high terrain.
MACHINE SHOP
A facility performing cutting, grinding, turning, honing, milling, debarring, lapping, electro-chemical machining, etching, or other similar operations.
MALFUNCTION
Any sudden and unavoidable failure of air pollution control equipment or process equipment or unintended failure of a process to operate in a normal or usual manner. Failures that are primarily caused by poor maintenance, careless operation, or any other preventable upset condition or preventable equipment breakdown shall not be considered malfunctions.
MANUFACTURING PROCESS OR PROCESS EQUIPMENT
An action, operation, or treatment involving chemical, industrial, or manufacturing factors, such as heat treating furnaces, or fuel-burning devices that are a part of a manufacturing process where emissions are intermixed with the process emissions, heating and reheating furnaces, sintering trains, electric furnaces, kilns, dryers, roasters, painting ovens, direct fired drying ovens, crushers, and all other methods and forms of manufacturing or processing that emit, or affect the emission of air pollutants, but not including fuel-burning equipment.
MONITORING SYSTEM
The complete set of equipment required under Regulation Number3 that is used to measure and record, if so required, those parameters specified.
MOTOR VEHICLE
Any self-propelled vehicle that is designed primarily for travel on the public highways and that is generally and commonly used to transport persons and property and for which registration in Colorado is required for operation on public roads and highways as defined in Colorado Revised Statute § 42-1-102(58).
MOTOR VEHICLE EXHAUST GAS ANALYZER
Any instrument adopted by the Commission that is used to measure the concentrations or mass of hydrocarbons, carbon monoxide, nitrogen oxides, oxygen and carbon dioxide in motor vehicle exhaust.
NEGLIGIBLY REACTIVE VOLATILE ORGANIC COMPOUNDS (NRVOCs)
The U.S. EPA definition of volatile organic compounds located in the Code of Federal Regulations Title 40, § 51.100 (s) (November 7, 1986), referred to within these regulations as Negligibly Reactive Volatile Organic Compounds is hereby incorporated by reference by the Commission and made a part of the Colorado Air Quality Control Commission Regulations.
The list of Negligibly Reactive Volatile Organic Compounds is included for easier reference:
Methyl Acetate |
Acetone |
Methane |
Ethane |
Methylene Chloride (Dichloromethane) |
1,1,1-Trichloroethane (Methylchloroform) |
1,1,2-Trichloro-1,2,2-Trifluoroethane (CFC-113) |
Trichlorofluoromethane (CFC-11) |
Dichlorodifluoromethane (CFC-12) |
Chlorodifluoromethane (HCFC-22) |
Trifluoromethane (HFC-23) |
1,2-Dichloro 1,1,2,2-Tetrafluoroethane (CFC-114) |
Chloropentafluoroethane (CFC-115) |
1,1,1-Trifluoro 2,2-Dichloroethane (HCFC-123) |
1,1,1,2-Tetrafluoroethane (HCFC-134A) |
1,1-Dichloro 1-Fluoroethane (HCFC 141B) |
1-Chloro 1,1-Difluoroethane (HCFC-142B) |
2-Chloro-1,1,1,2-Tetrafluoroethane (HCFC-124) |
Pentafluoroethane (HFC-125) |
1,1,2,2-Tetrafluoroethane (HFC-134) |
1,1,1-Trifluoroethane (HFC-143A) |
1,1-Difluoroethane (HFC-152A) |
Parachlorobenzotrifluoride (PCBTF) |
Cyclic, Branched, or linear completely methylated siloxanes |
Perchloroethylene (Tetrachloroethylene) |
3,3-dichloro-1,1,1,2,2-pentafluoropropane (HCFC-225ca) |
1,3-dichloro-1.1.2.2.3-pentafluoropropane (HCFC-225cb) |
1,1,1,2,3,4,4,5,5,5-decafluoropentane (HFC 43-10mee) |
Difluoromethane (HFC-32) |
Ethylfluoride (HFC-161) |
1,1,1,3,3,3-hexafluoropropane (HFC-236fa) |
1,1, 2, 2,3-pentafluoropropane (HFC-245ca) |
1,1,2,3,3-pentafluoropropane (HFC-245ea) |
1,1,1,2,3-pentafluoropropane (HFC-245eb) |
1,1,1,3,3-pentafluoropropane (HFC-245fa) |
1,1,1,2,3,3-hexafluoropropane (HFC-236ea) |
1,1,1,3,3-pentafluorobutane (HFC-365mfc) |
Chlorofluoromethane (HCFC-31) |
1 chloro-1-fluoroethane (HCFC-151a) |
1,2-dichloro-1,1,2-trifluoroethane (HCFC-123a) |
1,1,1,2,2,3,3,4,4-nonfluoro-4-methoxy-butane (C4F9OCH3) |
2-(difluoromethoxymethyl)-1,1,1,2,3,3,3-heptafluoropropane ((CF3)2CFCF2OCH3) |
1-ethoxy-1,1,2,2,3,3,4,4,4-nonfluorobutane (C4F9OC2H5) |
2-(ethoxydifluoromethyl)-1,1,1,2,3,3,3-heptafluoropropane ((CF3)2CFCF2OC2H5) |
1,1,1,2,2,3,3,-heptafluoro-3-methoxy-propane (n-C3F7OCH3, HFE-7000) |
3-ethoxy-1,1,1,2,3,4,4,5,5,6,6,6-dodecafluoro-2(trifluoromethyl)hexane (HFE-7500) |
1,1,1,2,3,3,3-heptafluoropropane (HFC 227ea) |
Methyl formate, (HCOOCH3) |
Tertiary Butyl Acetate |
(1)1,1,1,2,2,3,4,5,5,5,-decafluoro-3-methoxy-4-trifluoromethyl-pentane (HFE-7300) |
Propylene carbonate |
Dimethyl carbonate |
Perfluorocarbon Compounds which fall into these classes: --Cyclic Branched or Linear, Completely Fluorinated Alkanes --Cyclic, branched, or linear, completely fluorinated ethers with no unsaturations --Cyclic, Branched, or Linear, Completely Fluorinated Tertiary amines with no unsaturations --Sulfur containing Perfluorocarbons with no Unsaturations and with Sulfur Bonds only to Carbon and Fluorine |
2-amino-2-methyl-1-propanol (also known as AMP; CAS number 124-68-5) |
2, 3, 3, 3-tetrafluoropropene (also known as HFO-1234yf) |
trans 1-chloro-3, 3, 3-trifluoroprop-1-ene (also known as Solstice[TM] 1233zd(E)) |
HCF2OCF2H (also known as HFE-134) |
HCF2OCF2 OCF2H (also known as HFE-236cal2) |
HCF2OCF2 CF2 OCF2H (also known as HFE-338pcc13) |
HCF2OCF2 OCF2 CF2 OCF2H (also known as H-Galden 1040X or H-Galden ZT 130) |
trans-1, 3, 3, 3-tetrafluoropropene (also known as HFO-1234ze) |
NONATTAINMENT AREA
An area within Colorado designated by the Commission and approved by the U.S. EPA under the Code of Federal Regulations Title 40, § 81.306 (November 30, 2021), in which ambient air concentrations of any designated pollutant exceed the National Ambient Air Quality Standards for that pollutant.
OPACITY
The degree to which an air pollutant obscures the view of an observer, expressed in percentage of obscuration or the degree (expressed in percent) to which transmittance of light is reduced by the air pollutant.
OVERLOT GRADING
Earth moving used in land development prior to the construction of structures, utilities, streets, highways or other prepared surfaces.
OWNER OR OPERATOR
Any person, who owns, leases, operates, controls, or supervises a stationary source.
OZONE DEPLETING COMPOUND
Any substance on the list of Class I and Class II ozone depleting compounds as defined by the Administrator of the U.S. EPA in the Code of Federal Regulations, Part 82 (October 28, 2014) and as referenced in Section 602 of the Federal Clean Air Act (1990).
PARTICULATE MATTER
Any airborne finely divided solid or liquid material with an aerodynamic diameter smaller than one hundred micrometers.
PARTICULATE MATTER EMISSIONS
All finely divided solid or liquid material emissions, other than uncombined water, emitted to the ambient air as measured by applicable reference methods or an equivalent or alternative method specified by the U.S. EPA, or by a test method specified in an approved State Implementation Plan.
PERSON
Any individual, public or private corporation, partnership, association, firm, trust estate, the state or any department, institution or agency thereof, any municipal corporation, county, city and county, or other political subdivision of the state, or any other legal entity whatsoever that is recognized by law as the subject of rights and duties.
PETROLEUM
The crude oil removed from the earth and the oils derived from tar sands, shale, and coal.
PETROLEUM DISTILLATE
A volatile organic compound or a mixture including volatile organic compounds obtained from petroleum by a process of vaporization and condensation.
PETROLEUM REFINERY
Any facility engaged in producing gasoline, kerosene, distillate fuel oils, residual fuel oils, lubricants or other products through distillation, cracking, or reforming of unfinished petroleum derivatives.
PILOT PLANT
A small-scale facility first used for experimental purposes to study the feasibility of an operation prior to constructing a full-scale plant.
PM10
Particulate matter with an aerodynamic diameter less than or equal to a nominal ten micrometers (μm) as measured by an U.S. EPA approved reference method.
PM10 EMISSIONS
Finely divided solid or liquid material, with an aerodynamic diameter less than or equal to a nominal ten micrometers (μm) emitted to the ambient air as measured by applicable referenced methods, or an equivalent or alternative method specified by the U.S. EPA, or by a test method specified in an approved State Implementation Plan.
POTENTIAL TO EMIT
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 state enforceable and federally enforceable. Secondary emissions do not count in determining the potential to emit of a stationary source.
PROCESS UNIT
A single process or piece of process equipment.
PROCESS WEIGHT
The total weight of all materials introduced into a source operation, which source causes, any discharge of air pollutants into the atmosphere. Solid fuels introduced into any specific source will be considered as part of the process weight, but liquid and gaseous fuels and combustion air, including required excess air, will not.
PROCESS WEIGHT RATE
A rate established as follows:
PUBLIC ACCESS
A site to which the general public has access because entry onto such site is allowed or not prevented by natural or man-made barriers. A site shall be deemed to not be accessible to the public if entry onto the property:
REASONABLY AVAILABLE CONTROL TECHNOLOGY (RACT)
Technology that will achieve the maximum degree of emission control that a particular source is capable of meeting and that is reasonably available considering technological and economic feasibility. It may require technology that has been applied to similar, but not necessarily identical, source categories. It is not intended that extensive research and development be conducted before a given control technology can be applied to the source. This does not preclude requiring a short-term evaluation program to permit the application of a given technology to a particular type of source.
REASONABLE FURTHER PROGRESS
Annual incremental reductions in emissions of the applicable air pollutant (including substantial reductions in the early years following approval or promulgation of plan provisions under the Federal Act, Section 110(a)(2)(I) (1990), and regular reductions thereafter) that are sufficient in the judgment of the Commission and the U.S. EPA to provide for attainment of the applicable National Ambient Air Quality Standards by the date required in Section 172(a) (1990) of the Federal Act.
RECONSTRUCTION
Will be presumed to have taken place where the fixed capital cost of the new components exceeds fifty percent of the fixed capital cost of an entirely new stationary source. Any final decision as to whether reconstruction has occurred shall be made in accordance with the provisions in Regulation Number 6. In determining lowest achievable emission rate for a reconstructed stationary source, the provisions of Regulation Number 6 shall be taken into account in assessing whether a new source performance standard is applicable to such stationary source.
REFERENCE TEST METHOD
A method for the sampling and analysis of an air pollutant emission as designated by the U.S. EPA in the most recent edition of the Code of Federal Regulations Title 40, Part 60, Chapter 1, Appendix A, and the Code of Federal Regulations Title 40, Parts 51, 52, 61, and 63, for specific source categories and published in the Federal Register or any alternate or equivalent method approved and/or specified by the Commission or the Division and approved by the U.S. EPA.
REFINERY PROCESS UNIT
A segment of the petroleum refinery in which a specific processing operation is conducted.
REFINERY PROCESS UNIT TURNAROUND
Scheduled shutdown of a refinery process unit for the purpose of inspection or maintenance.
REID VAPOR PRESSURE (RVP)
The absolute vapor pressure of volatile crude oil and volatile non-viscous petroleum liquids except liquefied petroleum gases as determined by the appropriate American Society for Testing and Materials method.
RESIDENTIAL STRUCTURES
All buildings or other structures used primarily as a place of residence, and including both single and multi-family residential dwellings.
RESPONSIBLE OFFICIAL
One of the following:
ROADWAYS
Roads, other than haul roads, used for motorized vehicular traffic.
RUN
The net period of time during which an emission sample is collected. Unless otherwise specified, a run may be either intermittent or continuous.
SHUTDOWN
The cessation of operation of an air pollutant source for any purpose.
SOLID WASTE
Any waste classified as Type "zero" through Type "six" as specified by the Incinerator Institute of America.
SOURCE DEFINTIONS
Any source whatsoever at, from, or by reason of which there is emitted or discharged into the atmosphere any air pollutant.
A facility, building, structure, or installation, or any combination thereof, excluding dwellings that can reasonably be expected to cause or induce substantial mobile source activity that results in emissions of air pollutants that might reasonably be expected to interfere with the attainment and maintenance of National Ambient Air Quality Standards.
Motor vehicles and other sources of air pollution that emit pollutants while moving and that are capable of moving, and that commonly do not remain at one site (one or more contiguous or adjacent properties owned or operated by the same person or by persons under common control).
Any building, structure, facility, equipment, or installation, or any combination thereof belonging to the same industrial grouping that emit or may emit any air pollutant subject to regulation under the Federal Act that is located on one or more contiguous or adjacent properties and that is owned or operated by the same person or by persons under common control. Those emissions resulting directly from an internal combustion engine for transportation purposes or from a non-road engine as defined in I.B.40. of this regulation shall not be considered a stationary source. Buildings, structures, facilities, equipment, and installations shall be considered to belong to the same industrial grouping if they belong to the same major groups; i.e., have the same two-digit codes, as described in the Standard Industrial Classification Manual, 1987, but not later amendments.
See National Technical Information Service, Order No. PB 87-100012. The manual is available for examination at the office of the Director of the Air Pollution Control Division, Department of Public Health and Environment, 4300 Cherry Creek Drive South, Denver, Colorado, 80246-1530.
STACK
A flue, conduit, or duct arranged to conduct an air pollutant to the ambient air. For the purposes of stack height requirements, flares will be excluded from the definition of stack.
STANDARD CONDITIONS
A gas temperature of 20 degrees Celsius or 68 degrees Fahrenheit and a gas pressure of one atmosphere (760 torr).
STANDARD OF PERFORMANCE
A regulation that limits the quantity, rate, or concentration of emissions of air pollutants on a continuous basis, including any requirements that limit the level of opacity, prescribe equipment, set fuel specifications, or prescribe operation or maintenance procedures for a source to assure continuous emission reduction.
STARTUP
Any setting in operation of an air pollutant source for any purpose.
STEEL PRODUCTION CYCLE
The operation of a basic oxygen process furnace required to produce each batch of steel and includes the following major functions: scrap charging, preheating (when used), hot metal charging, primary oxygen blowing, additional oxygen blowing (when used), and tapping.
SUBMERGED FILL PIPE
Any gasoline or petroleum distillate tank fill pipe the discharge that is entirely submerged when the liquid level is six inches above the bottom of the tank. "Submerged fill pipe" when applied to a tank that is filled from the side is defined as any fill pipe the discharge opening that is entirely submerged when the liquid level is eighteen inches above the bottom of the tank.
TERMINALS
A petroleum distillate storage and distribution facility that has an average daily throughput of more than 76,000 liters (20,000 gallons) that is loaded directly into transport vehicles.
THERMAL DRYER
A process in which the moisture content of a processed material is reduced by contact with a heated stream of air or other gases that are exhausted to the ambient air.
TOTAL SUSPENDED PARTICULATE (TSP)
Particulate matter as measured by the method described in the Code of Federal Regulations, Title 40, Part 50, Appendix B (Hi-Volume Sampler).
TRANSFER AND LOADING SYSTEM
Any equipment or processes used to transfer or load materials for storage or shipment.
UNCLASSIFIED AREA
An area within Colorado that cannot, based on available information, be classified as attainment or nonattainment.
VAPOR BALANCE SYSTEM
The connecting together of the vapor spaces of two vessels such that when liquid is dispensed from the first vessel into the second vessel, the vapor in the second vessel is displaced by the incoming liquid and forced through the connection into the first vessel. This vapor then occupies the space in the first vessel that is vacated by the dispensed liquid.
VAPOR RECOVERY SYSTEM
A vapor collection system capable of collecting substantially all the volatile vapors and gases discharged from the storage vessel and a vapor disposal system capable of processing such vapors and gases to prevent any substantial emission to the ambient air.
VOLATILE ORGANIC COMPOUND (VOC) (see also Highly Volatile Organic Compound)
Any compound of carbon, excluding carbon monoxide, carbon dioxide, carbonic acid, metallic carbides or carbonates, and ammonium carbonate, that participates in atmospheric photochemical reactions, except those listed in the definition of negligibly reactive volatile organic compounds included in this regulation as having negligible photochemical reactivity. Volatile organic compounds may be measured by test methods specified in Colorado's EPA-approved State Implementation Plan, a Title V Permit, a reference method, an equivalent method, an alternative method or by procedures specified under the Code of Federal Regulations Title 40, Part 60, Title 40 Part 51, Subpart I or Appendix S, or Title 40, Part 52. Prior approval from the U.S. EPA is required in order to use an equivalent or alternative method. A reference method, an equivalent method or an alternative method, however, may also measure nonreactive organic compounds. In such cases, an owner or operator may exclude the compounds listed in the definition of net emission increase when determining compliance with a standard if the amount of such compound is accurately quantified and the Division approves such exclusion. As a precondition to excluding such compounds as volatile organic compounds, or at any time thereafter, the Division may require an owner or operator to provide monitoring or testing methods and results demonstrating, to the satisfaction of the Division, the amount of negligibly reactive compounds in the source's emissions. For the purposes of photochemical dispersion modeling, the non-criteria reportable NRVOC tertiary butyl acetate (also 2-butanone) shall be treated as a VOC.
WELFARE
As used in these regulations, effects on public welfare include, but are not limited to: effects on soils; water; crops; vegetation; manmade materials; animals; wildlife; weather; visibility; climate; damage to and deterioration of property; and hazards to transportation; as well as effects on economic values and on personal comfort and well being.
WOOD RESIDUE
Bark, sawdust, slabs, chips, shavings, mill trim, and other wood products derived from wood processing and forest management operations.
5 CCR 1001-2-I