Regulation 7
I.C.1.
General Requirements
PART B — Oil and Natural Gas Operations › I. Volatile Organic Compound Emissions from Oil and Gas Operations › I.C. General Provisions
I.C.1.a. All air pollution control equipment used to demonstrate compliance with this Section I. must be operated and maintained consistent with manufacturer specifications and good engineering and maintenance practices. The owner or operator must keep manufacturer specifications and documentation of compliance with maintenance practices on file. In addition, all such air pollution control equipment must be adequately designed and sized to achieve the control efficiency rates required by this Section I. and to handle reasonably foreseeable fluctuations in emissions of volatile organic compounds. Fluctuations in emissions that occur when the separator dumps into the tank are reasonably foreseeable.
Plain-English summary
AI-generated · automated check against source text · Oct 4, 2026
This provision applies to owners or operators of oil and gas operations using air pollution control equipment to comply with Section I (VOC emissions requirements). It requires that all such control equipment be operated and maintained per manufacturer specifications and good engineering practices, with those specifications and maintenance documentation kept on file. The equipment must be adequately designed and sized to achieve required control efficiency rates and handle reasonably foreseeable VOC emission fluctuations, including those occurring when the separator dumps into the tank.
I.C.1.b. All hydrocarbon liquids and produced water collection, storage, processing, and handling operations, regardless of size, must be designed, operated, and maintained so as to minimize emission of volatile organic compounds to the atmosphere to the maximum extent practicable.
Plain-English summary
AI-generated · automated check against source text · Oct 4, 2026
This provision applies to all hydrocarbon liquids and produced water collection, storage, processing, and handling operations, regardless of size. It requires that such operations be designed, operated, and maintained to minimize volatile organic compound (VOC) emissions to the atmosphere to the maximum extent practicable. The requirement is performance-based and applies regardless of the scale of operations.
I.C.1.c. All air pollution control equipment used to demonstrate compliance with Sections I.D., I.J., and I.K. must meet a control efficiency of at least 95%. Failure to properly install, operate, and maintain air pollution control equipment is a violation of this regulation,
Plain-English summary
AI-generated · automated check against source text · Oct 4, 2026
This provision applies to operators using air pollution control equipment to comply with specified sections of Regulation 7 (Sections I.D., I.J., and I.K.) covering oil and gas operations. It requires that all such control equipment achieve a minimum control efficiency of 95% and be properly installed, operated, and maintained. Failure to meet these installation, operation, or maintenance requirements constitutes a violation of the regulation.
I.C.1.d. If a flare or other combustion device is used to control emissions of volatile organic compounds to comply with Sections I.D., I.J., and I.K. it must be enclosed, have no visible emissions, and be designed so that an observer can, by means of visual observation from the outside of the enclosed flare or combustion device, or by other convenient means, such as a continuous monitoring device, approved by the Division, determine whether it is operating properly.
Plain-English summary
AI-generated · automated check against source text · Oct 4, 2026
This provision applies to operators using flares or other combustion devices to control VOC emissions under Sections I.D., I.J., and I.K. It requires such devices to be enclosed, produce no visible emissions, and be designed to allow an observer to verify proper operation through external visual observation or other convenient means (such as a continuous monitoring device) approved by the Division.
I.C.1.e. All combustion devices used to control emissions of volatile organic compounds to comply with Sections I.D., I.J., and I.K. must be equipped with and operate an auto-igniter as follows:
Plain-English summary
AI-generated · automated check against source text · Oct 4, 2026
Any combustion device you use to control VOC emissions to comply with Sections I.D., I.J., and I.K. must have an auto-igniter installed and working.
Show full summary
The specific deadline depends on the equipment and when it was built: for condensate storage tanks controlled by a combustion device that were constructed or modified after May 1, 2009 and before January 1, 2017, the auto-igniter must be installed and operational beginning the date of first production after any new tank installation or modification (State Only); for existing condensate tanks controlled by a combustion device to comply with Section I.D.1., the deadline was May 1, 2009 (if actual uncontrolled emissions were 50 tons per year or more) or May 1, 2010 (for all other such tanks), or within 180 days from first having installed the combustion device, whichever was later (State Only); all combustion devices installed on or after January 1, 2017 must be equipped with an operational auto-igniter upon installation, and so must those installed on or after January 1, 2018 and used to comply with Sections I.J. or I.K.
- I.C.1.e.(i). (State Only) For condensate storage tanks that are construct…
- I.C.1.e.(ii). (State Only) For all existing condensate storage tanks contr…
- I.C.1.e.(iii). All combustion devices installed on or after January 1, 2017…
- I.C.1.e.(iv). All combustion devices installed on or after January 1, 2018…
I.C.1.e.(i). (State Only) For condensate storage tanks that are constructed or modified after May 1, 2009, and before January 1, 2017, and controlled by a combustion device, auto-igniters must be installed and operational, beginning the date of first production after any new tank installation or tank modification.
Plain-English summary
AI-generated · automated check against source text · Oct 4, 2026
This provision applies to operators of condensate storage tanks constructed or modified between May 1, 2009, and January 1, 2017, that use combustion devices for control. It requires auto-igniters to be installed and operational starting from the date of first production following any new tank installation or tank modification. This is a state-only requirement.
I.C.1.e.(ii). (State Only) For all existing condensate storage tanks controlled by a combustion device in order to comply with the emissions control requirements of Section I.D.1., auto- igniters must be installed and operational beginning May 1, 2009, for condensate storage tanks with actual uncontrolled emissions of greater than or equal to 50 tons per year, and beginning May 1, 2010, for all other existing condensate storage tanks controlled by a combustion device, or within 180 days from first having installed the combustion device, whichever date comes later.
Plain-English summary
AI-generated · automated check against source text · Oct 4, 2026
This state-only provision applies to operators of existing condensate storage tanks that use combustion devices to meet Section I.D.1 emissions control requirements. It requires auto-igniters to be installed and operational beginning May 1, 2009, for tanks with actual uncontrolled emissions of 50 tons per year or greater, and beginning May 1, 2010, for all other existing tanks controlled by combustion devices, or within 180 days from first having installed the combustion device, whichever date comes later. The requirement references the emissions control requirements in Section I.D.1.
I.C.1.e.(iii). All combustion devices installed on or after January 1, 2017, must be equipped with an operational auto-igniter upon installation of the combustion device.
I.C.1.e.(iv). All combustion devices installed on or after January 1, 2018, and used to comply with Sections I.J. or I.K. must be equipped with an operational auto-igniter upon installation of the combustion device.
Plain-English summary
AI-generated · automated check against source text · Oct 4, 2026
This provision applies to operators who install combustion devices on or after January 1, 2018, to comply with the requirements in Sections I.J. or I.K. of this regulation. It requires that such combustion devices must be equipped with an operational auto-igniter at the time of installation. The auto-igniter must be operational.
I.C.1.f. (State Only)If a combustion device is used to control emissions of volatile organic compounds, surveillance systems must be employed and operational as follows:
I.C.1.f.(i). (State Only) Beginning May 1, 2010, for all existing condensate storage tanks with uncontrolled actual emissions of 100 tons per year or more based on data from the previous twelve consecutive months.
Plain-English summary
AI-generated · automated check against source text · Oct 4, 2026
This provision applies to existing condensate storage tanks with uncontrolled actual emissions of 100 tons per year or more (based on data from the previous twelve consecutive months). Beginning May 1, 2010, if a combustion device is used to control volatile organic compound emissions from such tanks, surveillance systems must be employed and operational as set out in section I.C.1.f (the parent provision). This is a state-only requirement establishing an applicability threshold and compliance date for high-emitting existing condensate storage tanks.
I.C.1.f.(ii). (State Only) For all new and modified condensate storage tanks controlled by a combustion device for the first 90 days surveillance systems must be employed and operational beginning 180 days from commencement of operation after the tank was newly installed, or after the well was newly drilled, re-completed, re-fractured or otherwise stimulated, if uncontrolled actual emissions projected for the first twelve months based on data from the first 90 days of operation from the condensate storage tank are 100 tons or more of uncontrolled VOCs.
Plain-English summary
AI-generated · automated check against source text · Oct 4, 2026
This state-only provision applies to operators of new and modified condensate storage tanks controlled by a combustion device. It requires surveillance systems to be employed and operational beginning 180 days from commencement of operation (after tank installation or well drilling, re-completion, re-fracturing, or other stimulation) if uncontrolled actual emissions projected for the first twelve months, based on the first 90 days of data, are 100 tons or more of uncontrolled VOCs. The surveillance system requirement is triggered by this 100-ton VOC threshold based on projected annual emissions.
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Regulation 7
CONTROL OF EMISSIONS FROM OIL AND GAS EMISSIONS OPERATIONS 5 CCR 1001-9
View official source ↗A preview of Regulation 7 — its structure, and a few AI-generated plain-English summaries. The full cross-referenced text is available to subscribers.
What's inside
- PART AApplicability and General Provisions
- Appendix AColorado Ozone Nonattainment or Attainment Maintenance Areas
- PART BOil and Natural Gas Operations
- PART CStatements of Basis, Specific Statutory Authority and Purpose
Plain-English summaries
Regulation 7
CONTROL OF EMISSIONS FROM OIL AND GAS EMISSIONS OPERATIONS 5 CCR 1001-9
Regulation 7 controls air emissions from oil and gas operations in Colorado. The regulation includes applicability and general provisions, requirements for oil and natural gas operations, and statements of basis and authority, along with an appendix covering Colorado's ozone nonattainment and attainment-maintenance areas, including a chronology of attainment status designations and maps.
I.A.1.a.
This provision applies to operators in the Denver 1-hour ozone attainment/maintenance area, any 1-hour ozone nonattainment area, the 8-hour Ozone Control Area, and northern Weld County. It establishes that all requirements of Regulation 7 apply within these geographic areas.
I.A.1.b.
This provision applies to any ozone nonattainment area in Colorado (areas designated nonattainment for either the 1-hour or 8-hour ozone standard). It states that all provisions of Regulation 7 apply to such areas unless otherwise specified in Section I.A.1.c. Maps and chronologies of Colorado's ozone nonattainment or attainment maintenance areas are provided in Appendix A of the regulation.
I.A.1.c.
This provision specifies that certain sections of Regulation 7 Part B (Sections II, III, IV, V, VI except VI.E., VII and VIII) apply statewide. Sections II through VIII and any other sections marked (State Only) are not federally enforceable, unless otherwise identified.
II.A.1.
The 8-Hour Ozone Control Area includes all of Adams, Arapahoe, Boulder, Douglas, Jefferson, Denver, and Broomfield counties, plus the southern portion of Larimer County (south of a line that starts at 40°42'47.1" north latitude on the Larimer-Weld boundary, runs west to 105°29'40.0" west longitude, south to 40°33'17.4" north latitude, then west to the Grand County boundary) and the southern portion of Weld County (below a line at 40°42'47.1" north latitude). The exact boundaries for the Larimer and Weld portions are defined by specific latitude and longitude coordinates.
Read the full text of Regulation 7
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