Regulations & Permits

Use this portal to filter and search for all of our regulatory information.

We oversee many state and federal laws designed to protect Washington's land, air, and water. See our laws, rules, & rulemaking page for more information about our current rules and rulemaking.

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Policies and guidance for site cleanups

Policies and guidance interpret the MTCA cleanup law and help you clean up contaminated sites.

https://ecology.wa.gov/Regulations-Permits/Plans-policies/Toxics-cleanup-policies

What to do if you spill oil or hazardous substances

Spills to water must be reported immediately to help reduce impacts to the environment.

https://ecology.wa.gov/Regulations-Permits/Reporting-requirements/Spills-If-you-spill

Preproposal Statement of Inquiry (CR-101) (WAC 173-360; WAC 173-360A) 03/23/2016

This is a rulemaking announcement (CR-101) for WAC 173-360 Underground Storage Tank (UST) Regulations.

https://ecology.wa.gov/Asset-Collections/Doc-Assets/Rulemaking/TCP/WAC173-360A_-16-02/Pre-proposal-statement-of-inquiry-(CR-101)-(WAC-17

Preliminary Draft - Overview of Changes (WAC 173-360; WAC 173-360A) 07/10/17

This document provides a summary of the proposed changes to WAC 173-360, Underground Storage Tank (UST) Regulations, included in the preliminary draft rule.

https://ecology.wa.gov/Asset-Collections/Doc-Assets/Rulemaking/TCP/WAC173-360A_-16-02/Preliminary-draft-Overview-of-changes-(WAC-173-3

Preliminary Draft - Parts 1-9 (WAC 173-360; WAC 173-360A) 07/10/17

This document includes Parts 1 through 9 of the preliminary draft of WAC 173-360A, Underground Storage Tank (UST) Regulations.

https://ecology.wa.gov/Asset-Collections/Doc-Assets/Rulemaking/TCP/WAC173-360A_-16-02/Preliminary-Draft-Parts-1-9-(WAC-173-360;-WAC-17

Preliminary Draft - Part 10 (Financial Responsibility) (WAC 173-360; WAC 173-360A) 07/10/17

This document includes Part 10 (financial responsibility) of the preliminary draft of WAC 173-360A, Underground Storage Tank (UST) Regulations.

https://ecology.wa.gov/Asset-Collections/Doc-Assets/Rulemaking/TCP/WAC173-360A_-16-02/Preliminary-Draft-Part-10-(Financial-Responsibil

Preliminary Draft - Summary - Deferred UST Compliance Dates (WAC 173-360; WAC 173-360A) 07/10/17

This table summarizes the dates by which owners and operators of previously deferred underground storage tank (UST) systems installed on or before the effective date of the UST rule would need to comply with the requirements of the preliminary draft of WAC 173-360A, Underground Storage Tank (UST) Regulations.

https://ecology.wa.gov/Asset-Collections/Doc-Assets/Rulemaking/TCP/WAC173-360A_-16-02/Preliminary-Draft-Summary-Prev-deferred-compli

Preliminary Draft - Summary - O&M Compliance Dates (WAC 173-360; WAC 173-360A) 07/10/17

This table summarizes operation and maintenance compliance dates under the preliminary draft of WAC 173-360A, Underground Storage Tank (UST) Regulations.

https://ecology.wa.gov/Asset-Collections/Doc-Assets/Rulemaking/TCP/WAC173-360A_-16-02/Preliminary-Draft-Summary-O-M-Compliance-Dates

Preliminary Draft - Summary - UST Record Retention Periods (WAC 173-360; WAC 170-360A) 07/10/17

This table summarizes how long owners and operators of underground storage tank systems would need to retain records of various regulated activities under the preliminary draft of WAC 173-360A, Underground Storage Tank (UST) Regulations.

https://ecology.wa.gov/Asset-Collections/Doc-Assets/Rulemaking/TCP/WAC173-360A_-16-02/hold

Preliminary Draft - Summary - Certification for UST Services (WAC 173-360; WAC 173-360A) 07/10/17

This table identifies the underground storage tank system services requiring the use of a service provider and the certification that a service provider must have to perform those services under the preliminary draft of WAC 173-360A, Underground Storage Tank (UST) Regulations.

https://ecology.wa.gov/Asset-Collections/Doc-Assets/Rulemaking/TCP/WAC173-360A_-16-02/Preliminary-Draft-Summary-Cert-to-Perform-UST

Ecology's contained-in determination policy memo

Ecology's policy about contained-in determinations.

https://ecology.wa.gov/Asset-Collections/Doc-Assets/Regulations-Permits/Guidance-technical-assistance/Contained-in-Determinations/Contained-in-determination-memo

Rulemaking Proposal (WAC 173-360; WAC 170-360A) 01/24/18

This is a rulemaking proposal (CR-102) for WAC 173-360; WAC 173-360A, Underground Storage Tank (UST) Regulations.

https://ecology.wa.gov/Asset-Collections/Doc-Assets/Rulemaking/TCP/WAC173-360A_-16-02/Rulemaking-Proposal-(WAC-173-360;-WAC-170-360A)-01

Proposed repeal of existing rule, Chapter 173-360 WAC, UST Regulations 01/24/18

This document lists the chapters of the Washington Administrative Code that are proposed to be repealed.

https://ecology.wa.gov/Asset-Collections/Doc-Assets/Rulemaking/TCP/WAC173-360A_-16-02/Rulemaking-proposed-language-(WAC-173-360A)-01-24

Proposed language for new rule, Chapter 173-360A WAC, UST Regulations 01/24/18

This document contains proposed language for the new Underground Storage Tank Regulations, WAC 173-360A.

https://ecology.wa.gov/Asset-Collections/Doc-Assets/Rulemaking/TCP/WAC173-360A_-16-02/Proposed-language-for-new-rule,-Chapter-173-360A-W

Overview of Changes to Current Rule (WAC 173-360; WAC 173-360A) 01/24/18

This document provides a summary of the proposed changes to Chapter 173-360 WAC included in Chapter 173-360A WAC, Underground Storage Tank (UST) Regulations.

https://ecology.wa.gov/Asset-Collections/Doc-Assets/Rulemaking/TCP/WAC173-360A_-16-02/Overview-of-Changes-to-Current-Rule-(WAC-173-360;

Text with Identified Changes to Current Rule (WAC 173-360; WAC 173-360A) 01/24/18

This document identifies changes to the current rule, WAC 173-360, Underground Storage Tank (UST) Regulations, that are included in WAC 173-360A.

https://ecology.wa.gov/Asset-Collections/Doc-Assets/Rulemaking/TCP/WAC173-360A_-16-02/Text-with-Identified-(Tracked)-Changes-to-Prelimin

Summary Table: Previously Deferred UST System Compliance Dates (WAC 173-360; WAC 173-360A) 01/24/18

This table summarizes the dates by which owners and operators of previously deferred underground storage tank (UST) systems installed on or before the effective date of the proposed rule, Chapter 173-360A WAC, would need to comply with the requirements of the rule.

https://ecology.wa.gov/Asset-Collections/Doc-Assets/Rulemaking/TCP/WAC173-360A_-16-02/Summary-Table-Previously-Deferred-UST-System-Comp

Text with Tracked Changes to Preliminary Draft (WAC 173-360; WAC 173-360A) 01/24/18

This document tracks changes between the preliminary draft of WAC 173-360A and the proposed rule of WAC 173-360A, Underground Storage Tank (UST) Regulations.

https://ecology.wa.gov/Asset-Collections/Doc-Assets/Rulemaking/TCP/WAC173-360A_-16-02/Text-with-Tracked-Changes-to-Preliminary-Draft-(WA

Summary Table: Operation and Maintenance Compliance Dates (WAC 173-360; WAC 173-360A) 01/24/18

This table summarizes the dates by which owners and operators of underground storage tanks (UST) systems installed on or before the effective date of the proposed rule, Chapter 173-360A WAC, would need to comply with the new operation and maintenance requirements specified in Part 4 of the rule.

https://ecology.wa.gov/Asset-Collections/Doc-Assets/Rulemaking/TCP/WAC173-360A_-16-02/Summary-Table-Operation-and-Maintenance-Complianc

Summary Table: Certification to Perform UST System Services (WAC 173-360; WAC 173-360A) 01/24/18

This table identifies the underground storage tank (UST) system services requiring use of a service provider and the certification that a service provider must have to perform those services under the proposed rule, Chapter 173-360A WAC.

https://ecology.wa.gov/Asset-Collections/Doc-Assets/Rulemaking/TCP/WAC173-360A_-16-02/Summary-Table-Certification-to-Perform-UST-System

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