40 CFR Table W-4A to Subpart W of Part 98
Default Total Hydrocarbon Leaker Emission Factors for Underground Natural Gas Storage
June 9, 2020
Open Table
| 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 |
1Valves include control valves, block valves and regulator valves.
2Other 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).
[81 FR 86517, Nov. 30, 2016]
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