Default Whole Gas Population Emission Factors

Industry segment Source type/component Emission factor (scf whole gas/ hour/unit) Population Emission Factors—Pneumatic Device Vents and Pneumatic Pumps, Gas Service 1 • 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 Service 1 • 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 Type 4 Onshore petroleum and natural gas gathering and boosting Protected Steel 0.93 Unprotected Steel 8.2 Plastic/Composite 0.28 Cast Iron 8.4 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.” [89 FR 42323, May 14, 2024]