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.
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
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
Tools for cleaning up contaminated sites
We have online tools and statistical packages to help you clean up contaminated sites.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/contamination-clean-up-tools
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/underground-storage-tank-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/underground-storage-tank-service-providers
Approved sampling and analysis procedures
Approved laboratory analysis methods for cleaning up contaminated sites.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/contamination-clean-up-tools/sampling-and-analysis-procedures
Chapter 173-360A WAC
This is the rulemaking page for Chapter 173-360A WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-360a
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
Model remedies under the Model Toxics Control Act
We've developed model remedies to help you clean up routine, low-risk contaminated sites under MTCA.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/mtca-model-remedies
Technical resources for sediment cleanups
Access our technical resources to help support your sediment cleanup decisions.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/sediment-cleanup-resources
Site Register & contaminated sites lists
Get information on contaminated site cleanups through our newsletter and database.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/site-register-lists-and-data
Terrestrial Ecological Evaluations
Terrestrial Ecological Evaluations (TEEs) identify and protect native plants and animals at sites.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/terrestrial-ecological-evaluation
Successful no further actions
Sites cleaned up using a model remedy might achieve "no further action" status faster.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/mtca-model-remedies/no-further-actions
Eagle US 2, Longview
We regulate water and hazardous waste at the Axiall Corporation's Eagle US 2 plant in Longview.
https://ecology.wa.gov/regulations-permits/permits-certifications/industrial-facilities-permits/eagle-us-2-llc
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