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Code of Federal Regulations Title 40. Protection of Environment 40 CFR Pt. 98, Subpt. W, Tbl. W-3A Table W–3A to Subpart W of Part 98—Default Total Hydrocarbon Leaker Emission Factors for Onshore Natural Gas Transmission Compression

Current as of January 02, 2025 | Updated by Findlaw Staff

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).

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Cite this article: FindLaw.com - Code of Federal Regulations Title 40. Protection of Environment 40 CFR Pt. 98, Subpt. W, Tbl. W-3A Table W–3A to Subpart W of Part 98—Default Total Hydrocarbon Leaker Emission Factors for Onshore Natural Gas Transmission Compression - last updated January 02, 2025 | https://codes.findlaw.com/cfr/title-40-protection-of-environment/cfr-pt-40-98-subpt-w-tbl-w-3a/

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