Resources for underground storage tank owners & operators
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Proper underground storage tank (UST) operation & maintenance can help prevent leaks, which protects the environment and the value of your property. Operators must be certified through an Ecology-approved training program. Ecology inspects tank systems at least every three years.
Be sure to check with the city and county authorities where your tank is located to find out if there are other requirements for your USTs.
Forms to submit to Ecology
- Alternative Fuel Installation or Conversion Checklist
- Galvanic Cathodic Protection Evaluation Checklist
- Impressed Current Cathodic Protection Evaluation Checklist
- Leak Testing Checklist
- Retrofit/Repair Checklist
- Site Check/Site Assessment Checklist
- 30-Day Notice
- Fuel Requests for USTs
- Operational Status Notice
- Permanent Closure Notice
- Temporary Closure Notice
Forms and checklists to keep on site
- Automatic Tank Gauges
- Biodiesel in USTs
- Check your Farm Tank… It may be Regulated
- Delivery Prohibition or “Red Tagging”
- Emergency Signage Required for UST Sites
- Focus on UST Rule Changes
- Financial Responsibility for USTs
- Flooding: Evaluating Your Underground Storage Tank System Before Restart
- Operator Training
- Preparing for an UST Inspection
- Temporary Closure of USTs
- Secondary Containment Requirements
- Site Assessments guidance for Underground Storage Tank Systems
- Spent Antifreeze
- Storage Tanks and Climate Change
- UST Spills and Releases
- UST Technical Assistance Program (Managing your UST System)
- Waste Oil Tanks
- What To Do if You Find a Leak or Spill from Your Underground Storage Tank
Did your tank leak or spill?
Tell the Ecology office in your region within 24 hours. Then follow the instructions in What to do if you find a leak or spill from your underground storage tank.
Annual tank fees
Tank fees are paid to Department of Revenue as an endorsement on the business license fee. The fee for each tank is:
- $243.21 beginning July 1, 2025
2025 fee increase focus sheet - $273.43 beginning July 1, 2026
2026 fee increase focus sheet
Related links
Contact information
Kris Grinnell
Kris.Grinnell@ecy.wa.gov
360-870-8459