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Chapter 173-360 WAC, Chapter 173-360A WAC

Ecology proposes to repeal existing Chapter 173-360 WAC and adopt new Chapter 173-360A WAC, Underground Storage Tank (UST) Regulations.  The new chapter would replace the repealed chapter and change the existing regulations.  As part of the rulemaking, Ecology propose to:

  1. Incorporate federal rule changes needed to maintain state program approval, as specified in 40 C.F.R. Parts 280 and 281 and adopted in June 2015.

  2. Incorporate changes to the state’s UST program specified in the authorizing state statute, Chapter 90.76 RCW.

  3. Make other selective changes to the requirements governing the state’s UST program (such as updating UST service provider requirements).

  4. Streamline rule requirements, improve rule clarity, and improve consistency within the rule and with other state and federal laws and rules.

Rulemaking Timeline


Announcement Phase (CR-101)

Filing date:
Mar. 23, 2016

Announcement documents

Rule Development Phase

March 23, 2016 - December 2017

Public input & involvement

Preliminary Draft - July 10, 2017

Documents: Comment Period:      
Comments were accepted on the Preliminary Draft through August 18, 2017, via eComments. A stakeholder meeting was held on August 16, 2017, to discuss the Preliminary Draft. This comment period is now closed.  

Rule Proposal Phase (CR-102)

Filing date:
Jan. 24, 2018

Rule proposal documents:
Additional Documents:

The following additional documents are available to help in your review of the rule proposal:

Comment period

Comments due March 16, 2018.  Ecology will review all comments received and plans for adoption June 2018. 

  • View comments at: http://cs.ecology.commentinput.com/?id=usNx2

  • By mail to: Kristopher Grinnell
                        Department of Ecology
                        P.O. Box 47600
                        Olympia, WA 98504-7600            

  • At a public hearings (described below)

Public Hearings:

Ecology will hold two public hearings on this rule proposal.  The hearings will begin with a short presentation and question and answer session, followed by the opportunity to provide testimony.  For assistance with disabilities, please contact Hanna Waterstrat by February 21, 2018. 

1.     Wednesday, February 28, 2018, at 1:00 pm.  You can attend this hearing in person or by webinar.


Hampton Inn and Suites
4301 Martin Way E
Olympia, WA 98516


This is an online meeting forum that you can attend from any computer using internet access.  To join the webinar, click on the following link for more information and instructions: https://watech.webex.com/watech/j.php?MTID=m340722cfb126efcee19fdb77e001afc4.  For audio only, call US toll number +1-240-454-0887 and enter access code 803 394 380.  Or to receive a free call back, provide your phone number when you join the event.

2.     Friday, March 2, 2018, at 1:00 pm.  This hearing will be a video conference.  You can attend the video conference in person at one of the following three locations:

Ecology Eastern Regional Office
4601 N Monroe Street
Spokane, WA

Ecology Northwest Regional Office
3190 160th Ave. SE
Bellevue, WA

Ecology Central Regional Office
1250 West Alder Street
Union Gap, WA 98903

Additional Languages

Español (Spanish) 中文 (Chinese) Tiếng Việt (Vietnamese) 한국어 (Korean)


To request ADA accommodation for disabilities, or printed materials in a format for the visually impaired, call Hanna Waterstrat at 360-407-7668 or email hanna.waterstrat@ecy.wa.gov. Persons with impaired hearing may call Washington Relay Service at 711. Persons with speech disability may call TTY at 877-833-6341.