Resources for underground storage tank owners & operators
Updated Underground Storage Tank rule takes effect Nov. 24, 2023
The legislature recently passed a law directing the Pollution Liability Insurance Agency (PLIA) to establish and run a new state financial assurance program for UST owners and operators. Ecology updated our underground storage tank regulations to allow for this new program. The changes take effect Nov. 24, 2023.
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.