40 CFR Part 98, Table W-5
Industry segment | Source type/component | Emissionfactor(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 Station 2 Components, Gas Service 3
| Natural gas distribution | Below Grade T-D Transfer Station | 0.3 |
|---|---|---|
| Below Grade M&R Station | 0.3 |
Population Emission Factors—Distribution Mains, Gas Service 4
| Natural gas distribution | Unprotected Steel | 5.1 |
|---|---|---|
| Protected Steel | 0.57 | |
| Plastic | 0.17 | |
| Cast Iron | 6.9 |
Population Emission Factors—Distribution Services, Gas Service 5
| 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 Stations 2 3
| 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 Service 4
| 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.”
[89 FR 42326, May 14, 2024]