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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Boeing Auburn Site Map Plain Text

Plain text description of the Boeing Auburn groundwater contamination site map.

https://ecology.wa.gov/boeing-auburn-site-map-plain-text

MNA Plain Text

Monitored natural attenuation (MNA) process at the Boeing Auburn site

https://ecology.wa.gov/mna-plaintext

Draft UST Service Provider list

This is a draft list of certified underground service tanks service providers.

https://ecology.wa.gov/ust-service-provider-list-10-01-17

Summary of Ecology Listening Session December 2018. Feedback on Draft Implementation Memo No. 22: Vapor Intrusion (VI) Investigations and Short-term Trichloroethene (TCE) Toxicity

This summary of the December 2018 Ecology Listening Session provides feedback on participant questions regarding Draft Implementation Memo No. 22.

https://ecology.wa.gov/summary-of-ecology-listening-session-december-2018

MTCASGL12.0: Excel workbook for individual hazardous substances

Statistical workbook for calculating cleanup levels for individual hazardous substances for sites being cleaned up under the Model Toxics Control Act.

https://ecology.wa.gov/workbook-for-calculating-cleanup-levels-for-indivi

July 28, 2021 Agenda - Accident Probabilities

Agenda for July 28, 2021, meeting on Accident Probabilities

https://ecology.wa.gov/july-28-2021-agenda-accident-probabilities

Brownfields funding opportunities in Washington State

Download a comprehensive list of federal and state funding and technical assistance opportunities for redeveloping brownfields in Washington.

https://ecology.wa.gov/brownfieldsfundingoverview

Online tool: Cleanup and Tank Search

Find information on contamination cleanup sites and underground storage tanks.

https://ecology.wa.gov/online-tool-cleanup-and-tank-search

Email list: Brownfields

Brownfields are abandoned or underutilized properties that may have environmental contamination. Join our email list to learn more about funding and educational opportunities to help redevelop brownfields into community assets.

https://ecology.wa.gov/email-list-brownfields

Requirements for submitting cleanup site data

You must submit your lab data electronically through EIM.

https://ecology.wa.gov/regulations-permits/reporting-requirements/data-submittal-requirements-for-cleanup-sites

Checklists and templates for site investigation reports and cleanup plans

Get help preparing remedial investigations, feasibility studies, and cleanup action plans.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/cleanup-report-checklists-and-templates

Empirical demonstrations under MTCA

Empirical demonstrations can show that applicable groundwater cleanup levels aren’t being exceeded.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/empirical-demonstrations-mtca

Online cleanup guide for homeowners and small businesses

An online cleanup guide for homes and small business properties that might be contaminated.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/guidance-for-residential-cleanups

Acronyms & glossary for the Toxics Cleanup Program

We have a list of acronyms and terms commonly used in contaminated site cleanup work.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/toxic-cleanup-acronyms

Vapor intrusion

We have guidance that helps you evaluate and respond to vapor intrusion at your MTCA cleanup site.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/vapor-intrusion-overview

Underground Storage Tank information for new owners and new installations

Information for new Underground Storage Tank (UST) owners and installation of new tanks.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/ust-owner-and-operator-resources/new-owner-new-tank

Underground storage tank service providers

Information for underground storage tank (UST) service providers and for those looking to find one.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/ust-owner-and-operator-resources/service-providers

Chapter 173-340 WAC

This is the rulemaking page for Chapter 173-340 WAC, Model Toxics Control Act Cleanup Regulations.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-340

Using the EIM Data Analysis Tool

The EIM Data Analysis Tool (EDAT) compares data from Ecology's EIM database to cleanup criteria.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/contamination-cleanup-tools/eim-data-analysis-tool

Approved sampling and analysis procedures

Approved laboratory analysis methods for cleaning up contaminated sites.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/contamination-cleanup-tools/sampling-and-analysis-procedures