40 C.F.R. § Table W-5 to Subpart W of Part 98
Current through September 30, 2024
| Industry segment | Source type/component | Emission factor (scf methane/hour/ component) |
| Population Emission Factors-LNG Storage Compressor, Gas Service | ||
| LNG storage | Vapor Recovery Compressor 1 | 4.17 |
| LNG import and export equipment | ||
| Population Emission Factors-Below Grade Transmission-Distribution Transfer Station Components and Below Grade Metering-Regulating Station2Components, Gas Service3 | ||
| Natural gas distribution | Below Grade T-D Transfer Station | 0.30 |
| Below Grade M&R Station | 0.30 | |
| Population Emission Factors-Distribution Mains, Gas Service4 | ||
| Natural gas distribution | Unprotected Steel | 5.1 |
| Protected Steel | 0.57 | |
| Plastic | 0.17 | |
| Cast Iron | 6.9 | |
| Population Emission Factors-Distribution Services, Gas Service5 | ||
| Natural gas distribution | Unprotected Steel | 0.086 |
| Protected Steel | 0.0077 | |
| Plastic | 0.0016 | |
| Copper | 0.03 | |
| Population Emission Factors-Interconnect, Direct Sale, or Farm Tap Stations23 | ||
| Onshore natural gas transmission pipeline | Transmission Company Interconnect M&R Station | 166 |
| Direct Sale or Farm Tap Station | 1.3 | |
| Population Emission Factors-Transmission Pipelines, Gas Service4 | ||
| Onshore natural gas transmission pipeline | Unprotected Steel | 0.74 |
| Protected Steel | 0.041 | |
| Plastic | 0.061 | |
| Cast Iron | 27 | |
1 Emission Factor is in units of "scf methane/hour/compressor."
2 Excluding customer meters.
3 Emission Factor is in units of "scf methane/hour/station."
4 Emission Factor is in units of "scf methane/hour/mile."
5 Emission Factor is in units of "scf methane/hour/number of services."
40 C.F.R. §Table W-5 to Subpart W of Part 98