Regulations last checked for updates: Nov 25, 2024

Title 40 - Protection of Environment last revised: Nov 21, 2024
Appendix - Table O-1 to Subpart O of Part 98—Emission Factors for Equipment Leaks
Equipment type Service Emission factor
(kg/hr/source)
≥10,000 ppmv <10,000 ppmv
ValvesGas0.07820.000131
ValvesLight liquid0.08920.000165
Pump sealsLight liquid0.2430.00187
Compressor sealsGas1.6080.0894
Pressure relief valvesGas1.6910.0447
ConnectorsAll0.1130.0000810
Open-ended linesAll0.011950.00150
source: 74 FR 56374, Oct. 30, 2009, unless otherwise noted.