Science & Technology
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Southern Company Gas Methane Challenge Partner Profile
Partner profile that provides an overview of the company and summary information about its involvement in EPA's voluntary methane programs.
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TC Energy US Gas Operations Methane Challenge Partner Profile
Partner profile that provides an overview of the company and summary information about its involvement in EPA's voluntary methane programs.
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Iroquois Gas Transmission Methane Challenge Partner Profile
Partner profile that provides an overview of the company and summary information about its involvement in EPA's voluntary methane programs.
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City of Tallahassee Gas Utility Methane Challenge Partner Profile
Partner profile that provides an overview of the company and summary information about its involvement in EPA's voluntary methane programs.
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Diversified Energy Company Methane Challenge Partner Profile
Partner profile that provides an overview of the company and summary information about its involvement in EPA's voluntary methane programs.
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City of Ellensburg Methane Challenge Partner Profile
Partner profile that provides an overview of the company and summary information about its involvement in EPA's voluntary methane programs.
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Southwest Gas Corporation Methane Challenge Partner Profile
Partner profile that provides an overview of the company and summary information about its involvement in EPA's voluntary methane programs.
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Vapor Recovery Units
Vapor recovery units (VRUs) are commonly used to capture methane emissions from storage tanks and a variety of other low pressure sources such as pipeline pigging operations, compressors, and dehydrators.
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Engine Exhaust
Natural gas-fired engines and turbines are used to run compressors throughout the natural gas value chain. In many operations, the natural gas stream is used to power these engines and turbines. Methane emissions result from incomplete combustion.
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Glycol Dehydrators
Glycol dehydrators are used to remove water from gas. The glycol absorbs water and methane when contacted with the wet gas. Glycol is then regenerated, where absorbed methane is vented to the atmosphere along with the water vapor.
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Equipment Leaks
Equipment leaks, commonly referred to as fugitive emissions, are characterized as unintentional emissions. Leaks occur from equipment components such as connectors, valves, open-ended lines, pressure relief valves, and storage tank thief hatches.
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Methanol Injection
Replacing a glycol dehydrator with methanol injection inhibits hydrate formation and eliminates dehydrator emissions.
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Storage Tanks
Storage tanks are used to hold oil and gas condensate and operate near atmospheric pressure. Gases dissolved in the oil and condensate 'flash' out of the liquid phase. These vapors, rich in methane, may be vented to the atmosphere.
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Optimize Glycol Circulation
During the glycol regeneration process, absorbed methane is vented at a rate directly proportional to the glycol circulation. Optimization of glycol circulation rates can reduce methane emissions at negligible cost.
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Pipeline Pig Launching and Receiving
Pipeline pigging is the practice of cleaning and/or inspecting pipelines. During pigging operations, the pig is inserted into the pipeline and is forced through by pipeline pressure or by using compressed gas.
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Reciprocating Compressors
A reciprocating compressor is used to increase the pressure of natural gas in pipelines. Reciprocating compressors vent natural gas from piston rod packing systems during normal operation.
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How to Activate
The Advisory Team provides guidance on protection actions during an radiological emergency. The A-Team is activated through the EPA Emergency Operations Center.
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Managing the Quality of Environmental Data at EPA Region 7
Information from Region 7 about managing the quality of environmental information
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Managing the Quality of Environmental Data at EPA Region 5
Information from Region 5 about managing the quality of environmental information
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Methane Challenge Continuous Improvement - Equipment Leaks
Presentation from the April 2020 Methane Challenge webinar.