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

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

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

Onshore natural gas transmission compression	Emission factor (scf/hour/component)		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—Compressor Components, Gas Service			Valve 1	14.84	9.51	Connector	5.59	3.58	Open-Ended Line	17.27	11.07	Pressure Relief Valve	39.66	25.42	Meter or Instrument	19.33	12.39	Other 2	4.1	2.63	Leaker Emission Factors—Non-Compressor Components, Gas Service			Valve 1	6.42	4.12	Connector	5.71	3.66	Open-Ended Line	11.27	7.22	Pressure Relief Valve	2.01	1.29	Meter or Instrument	2.93	1.88	Other 2	4.1	2.63

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

2 Other includes any potential equipment leak emission point in gas service that is not specifically listed in this table, as specified in § 98.232(e)(8).

[81 FR 86516, Nov. 30, 2016]