40 C.F.R. § Table W-4A to Subpart W of Part 98
Current through October 31, 2024
| Underground natural gas storage | Emission factor (scf/hour/component) | |
| If you survey using any of the methods in § 98.234(a)(1) through (6) | If you survey using Method 21 as specified in § 98.234(a)(7) | |
| Leaker Emission Factors-Storage Station, Gas Service | ||
| Valve1 | 14.84 | 9.51 |
| Connector (other) | 5.59 | 3.58 |
| Open-Ended Line | 17.27 | 11.07 |
| Pressure Relief Valve | 39.66 | 25.42 |
| Meter and Instrument | 19.33 | 12.39 |
| Other2 | 4.1 | 2.63 |
| Leaker Emission Factors-Storage Wellheads, Gas Service | ||
| Valve1 | 4.5 | 3.2 |
| Connector (other than flanges) | 1.2 | 0.7 |
| Flange | 3.8 | 2.0 |
| Open-Ended Line | 2.5 | 1.7 |
| Pressure Relief Valve | 4.1 | 2.5 |
| Other2 | 4.1 | 2.5 |
1 Valves include control valves, block valves and regulator valves.
2 Other includes any potential equipment leak emission point in gas service that is not specifically listed in this table, as specified in § 98.232(f)(6) and (8) .
40 C.F.R. §Table W-4A to Subpart W of Part 98