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.
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 173-340 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
Overview of compliance & enforcement at Ecology
View the compliance and enforcement authority we have, and what actions we have recently taken.
https://ecology.wa.gov/regulations-permits/compliance-enforcement/overview-of-compliance-enforcement
Rulemaking Adoption Notice (WAC 173-187) 6/14/24
This is a rulemaking adoption (CR-103) for WAC 173-187 Financial Responsibility
https://ecology.wa.gov/rulemaking-adoption-notice-wac-173-187-6-14-24
3 Year Worst Case Drill Outlook
A list, by year, of the plan holders that are expected to hold a worst-case drill.
https://ecology.wa.gov/3-year-worst-case-drill-outlook
Rulemaking Announcement (Tug Escort Rulemaking - Chapter 363-116 WAC) 02/22/23
This is a rulemaking announcement (CR-101) for Tug Escort Rulemaking (Chapter 363-116 WAC)
https://ecology.wa.gov/rulemaking-announcement-tug-escort-rulemaking-chap
EIS Scoping Presentation Slides
Slides from the EIS Scoping Presentation
https://ecology.wa.gov/eis-scoping-presentation-slides
Workshop #1 Slides_May 24, 2024
Workshop #1 Slides for May 24, 2024
https://ecology.wa.gov/workshop-1-slides_may-24-2024
117 results
21 - 40 of 117