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

Latest version.

Link to an amendment published at 81 FR 86517, November 30, 2016.

Underground natural gas storage	Emission factor (scf/hour/ component)
Leaker Emission Factors—Storage Station, Gas Service
Valve¹	14.84
Connector	5.59
Open-Ended Line	17.27
Pressure Relief Valve	39.66
Meter	19.33
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 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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