40 C.F.R. § Table W-1E to Subpart W of Part 98
Current through May 31, 2024
| Equipment components | 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-All Components, Gas Service1 | ||
| Valve | 4.9 | 3.5 |
| Flange | 4.1 | 2.2 |
| Connector (other) | 1.3 | 0.8 |
| Open-Ended Line2 | 2.8 | 1.9 |
| Pressure Relief Valve | 4.5 | 2.8 |
| Pump Seal | 3.7 | 1.4 |
| Other3 | 4.5 | 2.8 |
| Leaker Emission Factors-All Components, Light Crude Service1 | ||
| Valve | 3.2 | 2.2 |
| Flange | 2.7 | 1.4 |
| Connector (other) | 1.0 | 0.6 |
| Open-Ended Line | 1.6 | 1.1 |
| Pump | 3.7 | 2.6 |
| Agitator Seal | 3.7 | 2.6 |
| Other3 | 3.1 | 2.0 |
| Leaker Emission Factors-All Components, Heavy Crude Service1 | ||
| Valve | 3.2 | 2.2 |
| Flange | 2.7 | 1.4 |
| Connector (other) | 1.0 | 0.6 |
| Open-Ended Line | 1.6 | 1.1 |
| Pump | 3.7 | 2.6 |
| Agitator Seal | 3.7 | 2.6 |
| Other3 | 3.1 | 2.0 |
1 For multi-phase flow that includes gas, use the gas service emission factors.
2 The open-ended lines component type includes blowdown valve and isolation valve leaks emitted through the blowdown vent stack for centrifugal and reciprocating compressors.
3 "Others" category includes any equipment leak emission point not specifically listed in this table, as specified in § 98.232(c)(21) and (j)(10) .
4 Hydrocarbon liquids greater than or equal to 20°API are considered "light crude."
5 Hydrocarbon liquids less than 20°API are considered "heavy crude."
40 C.F.R. §Table W-1E to Subpart W of Part 98