Code of Federal Regulations > Title 40 > Chapter I > Part 98 > Subpart W > Appendix - Table W-5A to Subpart W of Part 98—Default Methane Leaker Emission Factors for Liquefied Natural Gas (LNG) Storage

Regulations last checked for updates: Nov 25, 2024

Title 40 - Protection of Environment last revised: Nov 21, 2024

Appendix - Table W-5A to Subpart W of Part 98—Default Methane Leaker Emission Factors for Liquefied Natural Gas (LNG) Storage

Link to an amendment published at 89 FR 42326, May 14, 2024.

LNG storage	Emission factor (scf/hour/component)
LNG storage	If you survey using any of the methods in § 98.234(a)(1) through (6)	If you survey using Method 21 as specified in § 98.234(a)(7)
Leaker Emission Factors—LNG Storage Components, LNG Service
Valve	1.19	0.23
Pump Seal	4.00	0.73
Connector	0.34	0.11
Other ¹	1.77	0.99
Leaker Emission Factors—LNG Storage Components, Gas Service
Valve ²	14.84	9.51
Connector	5.59	3.58
Open-Ended Line	17.27	11.07
Pressure Relief Valve	39.66	25.42
Meter and Instrument	19.33	12.39
Other ³	4.1	2.63

¹ “Other” equipment type for components in LNG service should be applied for any equipment type other than connectors, pumps, or valves.

² Valves include control valves, block valves and regulator valves.

³ “Other” equipment type for components in gas service should be applied for any equipment type other than valves, connectors, flanges, open-ended lines, pressure relief valves, and meters and instruments, as specified in § 98.232(g)(6) and (7).

[81 FR 86518, Nov. 30, 2016]

authority: 42 U.S.C. 7401-7671q.

source: 74 FR 56374, Oct. 30, 2009, unless otherwise noted.