1. LawStack
  2. Title 40 - Protection of Environment
  3. Chapter I - ENVIRONMENTAL PROTECTION AGENCY
  4. Subchapter C - AIR PROGRAMS
  5. Part 98 - MANDATORY GREENHOUSE GAS REPORTING
  6. Subpart W - Petroleum and Natural Gas Systems
  7. 40 CFR Table W-4B to Subpart W of Part 98
40 CFR Table W-4B to Subpart W of Part 98
Default Total Hydrocarbon Population Emission Factors for Underground Natural Gas Storage
June 9, 2020
CFR

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

Open Table
Underground natural gas storage Emission factor
(scf/hour/component)
Population Emission Factors—Storage Wellheads, Gas Service
Connector 0.01
Valve 0.1
Pressure Relief Valve 0.17
Open-Ended Line 0.03
Population Emission Factors—Other Components, Gas Service
Low Continuous Bleed Pneumatic Device Vents1 1.37
High Continuous Bleed Pneumatic Device Vents1 18.20
Intermittent Bleed Pneumatic Device Vents1 2.35

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

[81 FR 86517, Nov. 30, 2016]

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Table W-4A to Subpart W of Part 98 Default Total Hydrocarbon Leaker Emission Factors for Underground Natural Gas Storage
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Table W-5A to Subpart W of Part 98 Default Methane Leaker Emission Factors for Liquefied Natural Gas (LNG) Storage

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