Blowdown Vent Stacks 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 deferred blowdown vent stacks source category reporting requirements.

The blowdown vent stacks source category is applicable to Onshore Natural Gas Processing, Onshore Natural Gas Transmission Compression, and LNG Import and Export Equipment.

Refer to Blowdown Vent Stacks Instructions page for information regarding non-deferred data elements.

Blowdown Vent Stacks: Deferred Reporting Requirements

For all unique volumes that are blown down once during the year, the facility must report:

  • Report only if using Eq. W-14A
    • Total number of blowdowns for each unique physical volume in the calendar year (98.236(c)(7)(A))

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