Table W-3 of Subpart W of Part 98 - Default Total Hydrocarbon Emission Factors for Onshore Natural Gas Transmission Compression

Latest version.

Link to an amendment published at 81 FR 86515, November 30, 2016.

Onshore natural gas transmission compression	Emission factor (scf/hour/ component)
Leaker Emission Factors—Compressor Components, Gas Service
Valve¹	14.84
Connector	5.59
Open-Ended Line	17.27
Pressure Relief Valve	39.66
Meter	19.33
Leaker Emission Factors—Non-Compressor Components, Gas Service
Valve¹	6.42
Connector	5.71
Open-Ended Line	11.27
Pressure Relief Valve	2.01
Meter	2.93
Population Emission Factors—Gas Service
Low Continuous Bleed Pneumatic Device Vents²	1.37
High Continuous Bleed Pneumatic Device Vents²	18.20
Intermittent Bleed Pneumatic Device Vents²	2.35

¹Valves include control valves, block valves and regulator valves.

²Emission Factor is in units of “scf/hour/device.”

[76 FR 80593, Dec. 23, 2011]

                    
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