# Washington — Underground Storage Tank Operator Training Requirements by State

For Washington, implementing agency is Washington State Department of Ecology; class a training format is Combined Class A/B training from an approved vendor (classroom, web-based, independent study, or onsite) with a test to become certified; class b training format is Combined Class A/B training from an approved vendor (classroom, web-based, independent study, or onsite) with a test to become certified; class c training format is Training by the certified Class A/B operator, or through an approved training vendor; epa online training accepted is Not stated on this page; out-of-state training may be accepted if it meets Washington requirements, but in-state-only certifications such as Idaho's are not, recorded from its source on 2026-08-18.

- **jurisdiction:** Washington _(verified: appears in the quote below)_
- **implementing agency:** Washington State Department of Ecology _(verified: appears in the quote below)_
- **class a training format:** Combined Class A/B training from an approved vendor (classroom, web-based, independent study, or onsite) with a test to become certified _(verified: appears in the quote below)_
- **class b training format:** Combined Class A/B training from an approved vendor (classroom, web-based, independent study, or onsite) with a test to become certified _(verified: appears in the quote below)_
- **class c training format:** Training by the certified Class A/B operator, or through an approved training vendor _(verified: appears in the quote below)_
- **epa online training accepted:** Not stated on this page; out-of-state training may be accepted if it meets Washington requirements, but in-state-only certifications such as Idaho's are not _(our reading, not quoted from the source)_
- **exam pass threshold:** Not specified on this page _(verified: appears in the quote below)_
- **renewal interval years:** Not specified on this page; free site-specific online re-training for Class A/B operators is offered through WATOT _(verified: appears in the quote below)_
- **state approved providers:** yes (Ecology-approved training vendor list) _(our reading, not quoted from the source)_
- **regulatory citation:** Chapter 173-360A WAC _(verified: appears in the quote below)_

## What the source says

> Training is available in a variety of formats, including classroom, web-based, independent study, and onsite training. Each class A/B operator will be required to pass a test to become certified. Class C operators may obtain their certification through training by the certified class A/B operator, or through an approved training vendor.

## Source

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

Last verified: 2026-08-18. Review by: 2027-08-18.
Part of [Underground Storage Tank Operator Training Requirements by State](https://referencesource.org/ust-operator-training-requirements/).