eCFR.io
Daily eCFR

Table W-3 to Subpart W of Part 98—Default Total Hydrocarbon Population Emission Factors

Default Total Hydrocarbon Population Emission Factors

  1. CFR
  2. ›
  3. Title 40
  4. ›
  5. Chapter I
  6. ›
  7. Part 98
  8. ›
  9. Subpart W
  10. ›
  11. Appendix Table W-3 to Subpart W of Part 98
CorpusDaily eCFR
Displayed edition2026-04-15
Last updated2026-04-15

Table W-3 to Subpart W of Part 98—Default Total Hydrocarbon Population Emission Factors

Industry segmentSource type/componentEmission factor

(scf total hydrocarbon/

hour/component)
Population Emission Factors—Storage Wellheads, Gas Service
Underground natural gas storageConnector0.01
Valve0.1
Pressure Relief Valve0.17
Open-Ended Line0.03

[89 FR 42325, May 14, 2024]