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


Latest version.
  • Link to an amendment published at 81 FR 86517, November 30, 2016.

    Underground natural gas storageEmission factor (scf/hour/
    component)
    Leaker Emission Factors—Storage Station, Gas Service
    Valve114.84
    Connector5.59
    Open-Ended Line17.27
    Pressure Relief Valve39.66
    Meter19.33
    Population Emission Factors—Storage Wellheads, Gas Service
    Connector0.01
    Valve0.1
    Pressure Relief Valve0.17
    Open Ended Line0.03
    Population Emission Factors—Other Components, Gas Service
    Low Continuous Bleed Pneumatic Device Vents21.37
    High Continuous Bleed Pneumatic Device Vents218.20
    Intermittent Bleed Pneumatic Device Vents22.35

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

    2Emission Factor is in units of “scf/hour/device.”

    [76 FR 80593, Dec. 23, 2011]