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Table W-1 to Subpart W of Part 98-Default Whole Gas Population Emission Factors
Industry segment Source type/component Emission factor (scf whole gas/ hour/unit)
1 For multi-phase flow that includes gas, use the gas service emission factors.
2 Emission factor is in units of "scf whole gas/hour/device."
3 Emission factor is in units of "scf whole gas/hour/pump."
4 Emission factors are in units of "scf whole gas/hour/mile of pipeline."
Population Emission Factors—Pneumatic Device Vents and Pneumatic Pumps, Gas Service1
• Onshore petroleum and natural gas production Continuous Low Bleed Pneumatic Device Vents 2 6.8
• Onshore petroleum and natural gas gathering and boosting Continuous High Bleed Pneumatic Device Vents 2 21
Intermittent Bleed Pneumatic Device Vents 2 8.8
Pneumatic Pumps 3 13.3
• Onshore natural gas processing Continuous Low Bleed Pneumatic Device Vents 2 6.8
• Onshore natural gas transmission compression Continuous High Bleed Pneumatic Device Vents 2 30
• Underground natural gas storage Intermittent Bleed Pneumatic Device Vents 2 2.3
• Natural gas distribution
Population Emission Factors—Major Equipment, Gas Service1
• Onshore petroleum and natural gas production Wellhead 8.87
• Onshore petroleum and natural gas gathering and boosting Separator 9.65
Meters/Piping 7.04
Compressor 13.8
Dehydrator 8.09
Heater 5.22
Storage Vessel 1.83
Population Emission Factors—Major Equipment, Crude Service
Onshore petroleum and natural gas production Wellhead 4.13
Separator 4.77
Meters/Piping 12.4
Compressor 13.8
Dehydrator 8.09
Heater 3.2
Storage Vessel 1.91
Population Emission Factors—Gathering Pipelines, by Material Type4
Onshore petroleum and natural gas gathering and boosting Protected Steel 0.93
Unprotected Steel 8.2
Plastic/Composite 0.28
Cast Iron 8.4

[89 FR 42323, May 14, 2024]

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