Please see Reporting Form Instructions instructions on downloading the blank reporting form and uploading the completed reporting form.
You may also refer to Optional Calculation Spreadsheet Instructions to download the Subpart W calculation spreadsheet.

This page provides an overview of the Subpart W other emissions from equipment leaks estimated using emission factors source category e-GGRT reporting requirements.

The other emissions from equipment leaks estimated using emission factors source category is applicable to Onshore Petroleum and Natural Gas Production, Onshore Natural Gas Processing, Onshore Natural Gas Transmission Compression, Underground Natural Gas Storage, Liquefied Natural Gas (LNG) Storage, LNG Import and Export Equipment, and Natural Gas Distribution.

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• If the source type is present you must report required emissionselements.

If the facility has the source type, the Best Available Monitoring Methods and Missing Data table must be completed.

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• Component Type (98.236(c)(15))
  • Compressor Components, Gas Service - Valve
  • Compressor Components, Gas Service - Connector
  • Compressor Components, Gas Service - Open-Ended Line
  • Compressor Components, Gas Service - Pressure Relief Valve
  • Compressor Components, Gas Service - Meter
  • Non-compressor Components, Gas Service - Valve
  • Non-compressor Components, Gas Service - Connector
  • Non-compressor Components, Gas Service - Open-Ended Line
  • Non-compressor Components, Gas Service - Pressure Relief Valve
  • Non-compressor Components, Gas Service - Meter
  • Storage Station, Gas Service - Valve
  • Storage Station, Gas Service - Connector
  • Storage Station, Gas Service - Open-Ended Line
  • Storage Station, Gas Service - Pressure Relief Valve
  • Storage Station, Gas Service - Meter
  • LNG Storage, LNG Service - Valve
  • LNG Storage, LNG Service - Pump Seal
  • LNG Storage, LNG Service - Connector
  • LNG Storage, LNG Service - Other
  • LNG Storage, LNG Terminal - Valve
  • LNG Storage, LNG Terminal - Pump Seal
  • LNG Storage, LNG Terminal - Connector
  • LNG Storage, LNG Terminal – Other
  • LDC, T-D Stations - Connector
  • LDC, T-D Stations - Block Valve
  • LDC, T-D Stations - Control Valve
  • LDC, T-D Stations - Pressure Relief Valve
  • LDC, T-D Stations - Orifice Meter
  • LDC, T-D Stations - Regulator
  • LDC, T-D Stations - Open-ended Line
• Date of first complete survey (98.236(c)(15)(i)(A))
• Total count of leaks in the first survey (98.236(c)(15)(i)(A))
• Dates of further complete surveys (98.236(c)(15)(i)(A))
• Total count of leaks in further surveys (98.236(c)(15)(i)(A))
• For Onshore Natural Gas Processing facilities only
  • Minimum concentration of CO2 CO₂ (98.236(c)(15)(i)(B)) - this is a volumetric concentration expressed as a fraction.
  • Maximum concentration of CO2 CO₂ (98.236(c)(15)(i)(B)) - this is a volumetric concentration expressed as a fraction.
  • Minimum concentration of CH4 CH₄ (98.236(c)(15)(i)(B)) - this is a volumetric concentration expressed as a fraction.
  • Maximum concentration of CH4 CH₄ (98.236(c)(15)(i)(B)) - this is a volumetric concentration expressed as a fraction.
  • If only one concentration observation is available it is acceptable to use that concentration as both the minimum and maximum.
• Annual CO2 CO₂ emissions (98.236(c)(15)(i)(C))
• Annual CH4 CH₄ emissions (98.236(c)(15)(i)(C))

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• Component Type (98.236(c)(15))
  • Storage wellheads, Gas Service - Connector
  • Storage wellheads, Gas Service - Valve
  • Storage wellheads, Gas Service - Pressure Relief Valve
  • Storage wellheads, Gas Service - Open Ended Line
  • LNG Compressor - Vapor Recovery Compressor
  • Onshore, gas service - valve
  • Onshore, gas service - connector
  • Onshore, gas service - open-ended line
  • Onshore, gas service - pressure relief valve
  • Onshore, light crude service - valve
  • Onshore, light crude service - flange
  • Onshore, light crude service - connector
  • Onshore, light crude service - open-ended lineOnshore, light crude service - pump
  • Onshore, light crude service - other
  • Onshore, heavy crude service - valve
  • Onshore, heavy crude service - flange
  • Onshore, heavy crude service - connector
  • Onshore, heavy crude service - open-ended line
  • Onshore, heavy crude service - other
• Annual CO2 CO₂ Emissions (98.236(c)(15)(ii)(C))
• Annual CH4 CH₄ Emissions (98.236(c)(15)(ii)(C))
• Total count for each type of leak source (98.236(c)(15)(ii)(A))

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Onshore Production facilities that use Component Count Methodology 1 complete the following table:

• Major Equipment Type (98.236(c)(15)(ii)(B))
  • Wellheads
  • Separators
  • Meters/piping
  • Compressors
  • In-line heaters
  • Dehydrators
  • Heat-treater
  • Header
• Total count for each type of Major Equipment (98.236(c)(15)(ii)(B))

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