40 CFR Appendix Table W-4B to Subpart W of Part 98 - Table W-4B to Subpart W of Part 98—Default Total Hydrocarbon Population Emission Factors for Underground Natural Gas Storage

Link to an amendment published at 89 FR 42325, May 14, 2024.

Table W-4B to Subpart W of Part 98—Default Total Hydrocarbon Population Emission Factors for Underground Natural Gas Storage

Underground natural gas storage	Emission factor (scf/hour/component)
Population Emission Factors—Storage Wellheads, Gas Service
Connector	0.01
Valve	0.1
Pressure Relief Valve	0.17
Open-Ended Line	0.03
Population Emission Factors—Other Components, Gas Service
Low Continuous Bleed Pneumatic Device Vents 1	1.37
High Continuous Bleed Pneumatic Device Vents 1	18.20
Intermittent Bleed Pneumatic Device Vents 1	2.35

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

[81 FR 86517, Nov. 30, 2016]