40 CFR Part 98, Table W-6
| Equipment components | Emissionfactor (scf methane/hour/component) |
|---|---|
| If you survey using Method 21 as specified in § 98.234(a)(2)(i) | If you survey using Method 21 as specified in § 98.234(a)(2)(ii) | If you survey using any of the methods in § 98.234(a)(1), (3), or (5) |
Leaker Emission Factors—LNG Storage and LNG Import and Export Equipment—Storage Components and Terminals Components, LNG Service
| Valve | 1.19 | 0.23 | 1.94 |
|---|---|---|---|
| Pump Seal | 4 | 0.73 | 6.54 |
| Connector | 0.34 | 0.11 | 0.56 |
| Other 1 | 1.77 | 0.99 | 2.9 |
Leaker Emission Factors—LNG Storage and LNG Import and Export Equipment—Storage Components and Terminals Components, Gas Service
| Valve 2 | 14.84 | 9.51 | 24.2 |
|---|---|---|---|
| Connector | 5.59 | 3.58 | 9.13 |
| Open-Ended Line | 17.27 | 11.07 | 28.2 |
| Pressure Relief Valve | 39.66 | 25.42 | 64.8 |
| Meter and Instrument | 19.33 | 12.39 | 31.6 |
| Other 3 | 4.1 | 2.63 | 6.7 |
Leaker Emission Factors—Natural Gas Distribution—Transmission-Distribution Transfer Station 4 Components, Gas Service
| Connector | 1.69 | | 2.76 |
|---|---|---|
| Block Valve | 0.557 | | 0.91 |
| Control Valve | 9.34 | | 15.3 |
| Pressure Relief Valve | 0.27 | | 0.44 |
| Orifice Meter | 0.212 | | 0.35 |
| Regulator | 0.772 | | 1.26 |
| Open-ended Line | 26.131 | | 42.7 |
1 “Other” equipment type for components in LNG service should be applied for any equipment type other than connectors, pumps, or valves.
2 Valves include control valves, block valves and regulator valves.
3 “Other” equipment type for components in gas service should be applied for any equipment type other than valves, connectors, flanges, open-ended lines, pressure relief valves, and meters and instruments, as specified in § 98.232(g)(6) and (7) and § 98.232(h)(7) and (8).
4 Excluding customer meters.
[89 FR 42327, May 14, 2024]