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NOTE: Air quality in Rio Blanco County currently meets all NAAQS & CAAQS.
<br />Emissions, Source Classifications, & Regulatory Authority
<br />Emissions sources are generally regulated according to their type and classification. Essentially
<br />all emissions sources fall into three broad categories, stationary, mobile, and potable.
<br />Stationary sources are generally non - moving, fixed -site producers of pollution such as power
<br />plants, chemical plants, oil refineries, manufacturing facilities, and other industrial facilities.
<br />This source class can also cover certain types of portable sources (based on regulatory
<br />technicalities). Stationary facilities emit air pollutants via process vents or stacks (point sources)
<br />or by fugitive releases (emissions that do not pass through a process vent or stack), such as
<br />reserve pits, or equipment leaks. Stationary sources are also classified as major and minor. A
<br />major source is one that emits, or has the potential to emit, a regulated air pollutant in quantities
<br />above a defined threshold. Stationary sources that are not major are considered minor or area
<br />sources. Stationary sources that take federally enforceable limits on production, consumption
<br />rates, or emissions to avoid major source status are called synthetic minors. The Colorado
<br />Department of Public Health and Environment ( CDPHE), Air Pollution Control Division
<br />(APCD) has authority under their approved SIP, or by EPA delegation, to regulate and issue Air
<br />Permits for stationary sources of pollution in Colorado.
<br />Mobile sources of air pollution include motor vehicles and equipment that can be moved from
<br />one location to another (typically under their own power). Due to the large number of these
<br />sources, which includes cars, trucks, buses, locomotives, construction equipment, lawn and
<br />garden equipment, aircraft, watercraft, motorcycles, etc..., and their ability to move from one
<br />location to another, mobile sources are regulated differently than stationary sources. In general
<br />EPA and other federal entities retain authority to set emissions standards for these sources
<br />depending on their type (on -road or off -road) and class (light duty, heavy duty, horse power
<br />rating, weight, fuel types, etc.). Mobile sources are not regulated by the state unless they are
<br />covered under an applicable SIP specific to a nonattainment or maintenance area requirement.
<br />Portable sources are represented by equipment such as concrete and asphalt hatching plants, and
<br />potentially frac engines and drill rigs in the technical sense. These sources are relocated from
<br />place to place periodically and generally do remain in a single location long enough to be
<br />classified as a stationary source. Some portable sources equipment is regulated by CDPHE
<br />permitting.
<br />DOI- BLM -CO- 110 - 2012 - 0023 -EA 16
<br />years
<br />Sulfur Dioxide
<br />primary
<br />1 -hour
<br />75 ppb
<br />99th percentile of 1-
<br />[75 FR 35520 Jun 22
<br />hour daily maximum
<br />2010]
<br />concentrations,
<br />[38 FR 25678, Sept 14,
<br />averaged over 3 years
<br />primary
<br />Annual (State Only)
<br />0.03 ppm
<br />Arithmetic Average
<br />1973]
<br />secondary
<br />3 -hour
<br />0.5 ppm
<br />Not to be exceeded
<br />more than once per
<br />year
<br />NOTE: Air quality in Rio Blanco County currently meets all NAAQS & CAAQS.
<br />Emissions, Source Classifications, & Regulatory Authority
<br />Emissions sources are generally regulated according to their type and classification. Essentially
<br />all emissions sources fall into three broad categories, stationary, mobile, and potable.
<br />Stationary sources are generally non - moving, fixed -site producers of pollution such as power
<br />plants, chemical plants, oil refineries, manufacturing facilities, and other industrial facilities.
<br />This source class can also cover certain types of portable sources (based on regulatory
<br />technicalities). Stationary facilities emit air pollutants via process vents or stacks (point sources)
<br />or by fugitive releases (emissions that do not pass through a process vent or stack), such as
<br />reserve pits, or equipment leaks. Stationary sources are also classified as major and minor. A
<br />major source is one that emits, or has the potential to emit, a regulated air pollutant in quantities
<br />above a defined threshold. Stationary sources that are not major are considered minor or area
<br />sources. Stationary sources that take federally enforceable limits on production, consumption
<br />rates, or emissions to avoid major source status are called synthetic minors. The Colorado
<br />Department of Public Health and Environment ( CDPHE), Air Pollution Control Division
<br />(APCD) has authority under their approved SIP, or by EPA delegation, to regulate and issue Air
<br />Permits for stationary sources of pollution in Colorado.
<br />Mobile sources of air pollution include motor vehicles and equipment that can be moved from
<br />one location to another (typically under their own power). Due to the large number of these
<br />sources, which includes cars, trucks, buses, locomotives, construction equipment, lawn and
<br />garden equipment, aircraft, watercraft, motorcycles, etc..., and their ability to move from one
<br />location to another, mobile sources are regulated differently than stationary sources. In general
<br />EPA and other federal entities retain authority to set emissions standards for these sources
<br />depending on their type (on -road or off -road) and class (light duty, heavy duty, horse power
<br />rating, weight, fuel types, etc.). Mobile sources are not regulated by the state unless they are
<br />covered under an applicable SIP specific to a nonattainment or maintenance area requirement.
<br />Portable sources are represented by equipment such as concrete and asphalt hatching plants, and
<br />potentially frac engines and drill rigs in the technical sense. These sources are relocated from
<br />place to place periodically and generally do remain in a single location long enough to be
<br />classified as a stationary source. Some portable sources equipment is regulated by CDPHE
<br />permitting.
<br />DOI- BLM -CO- 110 - 2012 - 0023 -EA 16
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