Public Comment Form

Commenting open: April 18, 2024 08:00AM PT - May 31, 2024 11:59PM PT.

Rulemaking - WAC 173-400/401 and Source Test Manual

Ecology is seeking informal public comments on the following actions:

  • Draft amendments to two air quality rules

  • Chapter 173-400 WAC, General Regulations for Air Pollution Sources
  • Chapter 173-401 WAC, Operating Permit Regulation

  • Draft updates to Ecology's 2004 Source Test Manual - Procedures for Compliance Testing

Amendments to Chapter 173-400 WAC will incorporate an updated version of the Source Test Manual and update the rule's adoption date to adopt by reference applicable federal rules in effect at that time.

Amendments to Chapter 173-401 WAC will repeal the affirmative defense provisions to align with EPA's July 2023 rule that repealed those provisions in Title V of the federal Clean Air Act.

Updates to the 2004 Source Test Manual will update dates and remove outdated source testing methods.

Contact Information

*Indicates Required Fields

Submitted by Value

First Name

Last Name






Your Comment

Send us informal comments

The informal comments you provide will inform our rule language and updates to the Source Test Manual. We will propose the amended rules and open up a formal public comment in Fall 2024.

Ecology will consider all informal comments received, but only responds to formal comments submitted during the formal public comment period.

To make a comment, enter comment(s) in the text area. To submit an attachment, use the "Upload File" button below. Then click "Continue" to review your comment(s).

Information (e.g., personal or contact) you provide on this comment form or in an attachment may be publicly disclosed and posted on the internet.

*Uploading a file is optional*

You may attach up to five 20 MB files to accompany your submission. Allowed formats are pdf, jpg, jpeg, png, txt, gif, doc, docx, xlsx, xls. If you experience technical difficulties submitting your comment please contact the person listed at the bottom of this page.

Thank you for subscribing to the Rulemaking - WAC 173-400/401 and Source Test Manual mailing list.