40 CFR Appendix Table W-4A to Subpart W of Part 98 - Default Total Hydrocarbon Leaker Emission Factors for Underground Natural Gas Storage
|Underground natural gas storage||Emission factor
|If you survey using any of the methods in § 98.234(a)(1)
|If you survey using Method 21 as
|Pressure Relief Valve||39.66||25.42|
|Meter and Instrument||19.33||12.39|
|Connector (other than flanges)||1.2||0.7|
|Pressure Relief Valve||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).
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