UNDERGROUND STORAGE TANKS (USTs)*
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Overview of Program
Washington State has a federally-approved state Underground Storage Tank (UST) program. This means that state law, not federal law, applies to UST systems in this state.
Under state law, the Department of Ecology (Ecology) currently regulates more than 9,200 tanks at more than 3,400 facilities, including gas stations, industries, commercial properties, and governmental entities. Ecology works to ensure these tanks are installed, managed, and monitored in a manner that prevents releases into the environment. To do so, Ecology conducts compliance inspections at about 1,200 facilities each year, and provides technical assistance to tank owners.
Changes to UST Regulations (click to show/hide)
On August 8, 2012, the Department of Ecology (Ecology) adopted changes to Chapter 173-360 WAC, Underground Storage Tank Regulations. The changes will be published in the Washington State Register on September 5, 2012, and become effective on October 1, 2012. The changes:
To learn more about the changes please visit the adopted rules webpage for details and copies.
Compliance with New Operator Training Requirements
Under the adopted rule amendments, operators must be trained by December 31, 2012. Visit our operator training webpage to learn more about operator training requirements and training opportunities.
Underground Storage Tank Compliance Act of 2005
In 2005, Congress passed the Energy Policy Act. Title XV, Subtitle B of this act (titled the Underground Storage Tank Compliance Act) contains amendments to Subtitle I of the Solid Waste Disposal Act, the original legislation that created the federal UST program. The Act requires state UST programs receiving federal funding to comply with new federal requirements, including:
To learn more about the federal requirements, see
* Always check with your local environmental authority as they may have regulations for activities regarding USTs, Oil Water Separator Maintenance and Rules.
Page last revised May 6, 2015
Copyright © Washington State Department of Ecology. See http://www.ecy.wa.gov/copyright.htm