Reciprocating Compressors Deferred
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Please see Reporting Form 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 reciprocating compressors source category e-GGRT reporting requirements.

The reciprocating compressors 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, and LNG Import and Export Equipment.

Refer to Reciprocating Compressors Instructions page for information regarding non-deferred data elements.

Reciprocating Compressor Reporting (Onshore Petroleum and Natural Gas Production)

The reporting requirements for Onshore Petroleum and Natural Gas Production differ from the rest of the industry segments for this source type. Facilities in the Onshore Petroleum and Natural Gas Production industry segment, are required to report:

  • Count of compressors (98.236(c)(14)(v)(A))

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Reciprocating Compressor Reporting (Onshore Natural Gas Processing, Onshore Natural Gas Transmission Compression, Underground Natural Gas Storage, Liquefied Natural Gas (LNG) Storage, and LNG Import and Export Equipment)

All applicable industry segments other than Onshore Petroleum and Natural Gas Production must report emissions individually for each reciprocating compressor.

The exact reporting requirements are described below:

  • For Reciprocating Compressors in OPERATING MODE (required if compressor was ever in that operating mode at any point during the year)
    • Total time in operating mode (hours) (98.236(c)(14)(i)(B))
  • For Reciprocating Compressors in OPERATING AND STANDBY, PRESSURIZED MODE
    • Total time in standby, pressurized mode (hours) (98.236(c)(14)(ii)(B))
    • Reporter emission factor for blowdown vents (standard cubic feet per hour) (98.236(c)(14)(ii)(B))
  • For Reciprocating Compressors in NOT OPERATING, DEPRESSURIZED MODE
    • Total time the compressor is in not operating, depressurized mode (hours) (98.236(c)(14)(iii)(A))
    • Reporter emission factor for isolation valve emissions (standard cubic feet per hour) (98.236(c)(14)(iii)(B))

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