Underground Storage Tank (UST) Public Record --

(Federal Energy Policy Act of 2005 requirement)

Department of Ecology’s Underground Storage Tank (UST) Program collects data on the Sources and Causes of UST Releases in Washington State.  This is a reporting requirement of the federal Energy Policy Act of 2005.  The data displayed on this page is for Federal Fiscal Year 2016 (October 1, 2015 to September 30, 2016).

General Information as of October 2016:

Total Number of Active UST Sites – 3,365 sites
Total Number of Active USTs – 9,051 tanks

Summary Information for On-Site Inspections for Federal Fiscal Year 2016: 1,624

Total Number of UST Site Compliance Inspections Conducted: 1,388 inspections (1,358 by Ecology inspectors and 30 by EPA inspectors).

Percent of Sites in Compliance with the UST Regulation on the day of inspection:   80% of sites in full compliance (a combined measure of release detection and release prevention requirements).

NOTE: Tank Facility and on-site inspection information is based on USTs regulated under federal Subtitle I that satisfy the definition of UST in 40 CFR 280.12, except for those identified in 40 CFR 280.10(b) and (c) as excluded or deferred USTs. Emergency power generator USTs are included. On-site compliance inspections measure significant operational compliance as defined by the U.S. Environmental Protection Agency.

Summary Information on UST Contamination Found (Releases) for Federal Fiscal Year 2016:

Number of Confirmed Releases: 37 sites with confirmed contamination.

NOTE:  A majority of the 37 releases reported, were found when old tanks were being removed and when the soil was sampled it showed contamination.  These may be termed “legacy releases.”  Legacy or historical releases are ones that may have occurred years ago and contamination was found during this fiscal year.  The release may have been discovered as the result of a site assessment, property redevelopment, or transaction involving tank removals.  This is in contrast to releases discovered due to leak detection, tank gauging systems, UST operator discoveries, unusual operating conditions, etc., as part of ongoing operation of the USTs.  During tank removals and closures, it is difficult to determine the source or cause of the release from the sampling.  The cause of a legacy release is more difficult to determine than a release that occurs and is detected in real time.  Therefore, one will find a large percentage of the Sources and Causes of the releases identified in the chart below as “unknown”.

Confirmed Releases found during Fiscal Year 2016

Sources   Causes  
Corrosion Other Overfill Physical or
Mechanical Damage
Spill Unknown Grand
Delivery Problem     1 2     3
Dispenser   1 1 2   3 7
Piping     1 1   2 4
Tank 2   1 1 2 2 8
Unknown           15 15
TOTALS 2 1 4 6 2 22 37

Information posted February 14, 2017