1. Regulations
  2. title 40
  3. chapter I-i22
  4. part 98
  5. subpart W
  6. appendix-i 12

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

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

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

Underground natural gas storage Emission factor
(scf/hour/component) 		Population Emission Factors—Storage Wellheads, Gas ServiceConnector0.01 Valve0.1 Pressure Relief Valve0.17 Open-Ended Line0.03 Population Emission Factors—Other Components, Gas ServiceLow Continuous Bleed Pneumatic Device Vents 11.37 High Continuous Bleed Pneumatic Device Vents 118.20 Intermittent Bleed Pneumatic Device Vents 12.35

1 Emission Factor is in units of “scf/hour/device.”

[81 FR 86517, Nov. 30, 2016]

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

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