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Underground Storage Tanks 2025

Adopted rule

Administrative Order No.: DEQ-13-2025
Filed: May 9, 2025
Effective: July 1, 2025
See Oregon Bulletin, June 2025

Rulemaking contact: Diana Foss, 503-869-0770

Then Environmental Quality Commission adopted updates to OAR Chapter 340, Division 160, the rules that govern the licensing and work requirements for the contractors who perform services on regulated underground storage tank systems. The adopted rules clarify the language between the Underground Storage Tank contractor rules and the UST equipment rules aligning Oregon's rules with the federal regulations. The adopted rules also increase oversight of the testing, repair and construction work performed by licensed UST contractors to increase compliance with the UST regulations.

Advisory committee

DEQ convened an advisory committee to review the technical issues and fiscal impacts related to the proposed rules. In convening this committee, DEQ has appointed members that reflect the range of entities that are both directly and indirectly affected by proposed changes to the rules.

​​Meeting 3: Dec. 3, 2024

Meeting 2: Oct. 3, 2024

Meeting 1: Aug. 22, 2024


Public involvement

The comment period closed at 4 p.m. on Feb. 24, 2025.

For more information, see the Notice of Proposed Rulemaking, which includes the notice and proposed rules.

Public hearing

A public hearing was held on Friday, Feb. 21, 2025. 

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EQC action

The Environmental Quality Commission adopted these rules at its meeting on May 8, 2025.

Item C: Underground Storage Tanks 2025 (Action)