Underground Storage Tanks (2024)

Underground Storage Tanks (USTs)

Revised UST regulations, Effective December 1, 2021DEEP has made revisions to Connecticut’s Underground Storage Tank (“UST”) regulations section 22a-449(d)-101 to 113, inclusive of the Regulations of Connecticut State Agencies. These revisions are in response to the U.S. Environmental Protection Agency’s (“USEPA”) rule change to the federal underground storage tank regulations, published on July 15, 2015. DEEP’s revisions to the UST regulations ensures that the UST Program is no less stringent than the federal program and that the UST Program can maintain state program approval from USEPA. Maintaining state program approval from USEPA ensures that the UST Program will continue to receive federal grant funding to continue implementing Connecticut’s robust UST inspection and enforcement program.

COVID-19 UST Questions and Answers

Planning a UST Removal?

Please use the fillable form,Notification of Scheduled Permanent Closure of USTsand send toDEEP.30DayUST@ct.gov.Reminder: Notice is required 30 daysPRIOR toremoval.

Review DEEP Fact Sheet on Sampling and Analytical Methods for Underground Storage Tank Closureprior to removal of the USTs.

Also please be aware that Notification usingUnderground Storage Tanks (1)is still required no later than30 days after removal of the USTis complete.

Note: The owner of a site, where a UST System was last used by a prior owner or operator, may request an exception to the use of ezFile fornotification of UST closure provided the following terms and conditions are met:

Eligibility Criteria

The UST System must:

  1. have been used for the storage of heating oil for on-site consumption only;
  2. not have been used to power an emergency generator;
  3. have been permanently closed by a prior owner or operator;
  4. have been removed from the ground or permanently closed in-place in accordance with R.C.S.A 22a-449(d)-1(k).

If the eligibility criteria has been met, please complete and submit the Heating Oil UST Reporting Exemption Request Formandattach any supporting documentation that demonstrates the UST System was permanently closed.

Alternate Life Expectancy for Certain Underground Storage Tanks

FOR PETROLEUM USTS WHICHAREUSED FOR HEATING OIL FOR ON-SITE CONSUMPTION

On May 24, 2017, pursuant to section 22a-449(d)-1(h)(3) of the Regulations of Connecticut State Agencies (RCSA), the Commissioner of Energy and Environmental Protection issued anApproval of an Alternative Life Expectancy for Underground Storage Tanks Used Solely for Storage of Heating Oil for On-Site Consumption(Second Approval). For underground storage tanks (USTs) subject to RSCA section 22a-22a-449(d)-1, that satisfy eligibility criteria and certain terms and conditions, this Second Approval extends the life expectancy of a tank to forty (40) years from the date of installation. Prior to this second approval most USTs had a life expectancy of 30 years.

Notification to the department isnotrequired at this time.

---------------------------------------------

FOR PETROLEUM USTSNOTUSED FOR HEATING OIL FOR ON-SITE CONSUMPTIONOn June 22, 2016, pursuant to section 22a-449(d)-111(d) of the Regulations of Connecticut State Agencies (RCSA), the Commissioner of Energy and Environmental Protection issued anApproval of an Alternative Life Expectancy For Certain Underground Storage Tanks(Approval). For underground storage tanks (USTs) subject to RSCA section 22a-22a-449(d)-101 et seq., that satisfy eligibility criteria and certain terms and conditions, this Approval extends the life expectancy of a tank to forty (40) years from the date of installation. Prior to this approval most USTs had a life expectancy of 30 years.

Notification to the department is required.Eligible USTs that meet the terms and conditions of the Approval must send aNotice of Alternate Life Expectancy for USTsto the department. Also available inPDF.

If you need assistance in determining if your UST’s are eligible for this extension, or it is in your interest to meet and maintain the terms and conditions to maintain eligibility, it is recommended you consult with your UST equipment service provider, fuel supplier, or industry group.

(NEW)Alternate Life Expectancy Frequently Asked Questions -FAQ

Paperless Forms are Required with DEEP's ezFile!

Underground Storage Tanks (2)

(https://www.ct.gov/deep/ezFile)

Need help with ezFile?Click here:List of Companies and Individuals Providing EZFile Services

First Time Users:

  • Set up User Accounts with usernames and passwords
    (Creating your ezFile Acct Tutorial) for

    • Owner/Operator

    • Subscribers

    • Class A and Class B Operators

    • Tank Installers.

  • Create a Subscriber Agreement (SA)electronically in ezFile. (SA Tutorial)

  • Print Subscriber Agreement (SA).

  • Get "wet" signatures on Subscriber Agreement. (Owner/Operator and any Subscribers)

  • Mail Subscriber Agreement to DEEP and wait for email approval.

  • Complete your Notifications and have them ready to file beginning August 1st.

Returning Users:

  • Log into ezFile with your username and password.

  • Select approved facility filings and renew, making any required changes.

  • Create new filings for facilities not previously submitted through ezFile.

  • Submit Notification and Fee Payment between August 1st and October 10th.

For questions or assistance regardingezFile, please contact the Licensing and Enforcement Unit at 860-424-3374 or e-mail deep.USTEnforcement@ct.gov

Public Act No. 15-1 requires all communication with the DEEP to be electronic. An exception must be granted by DEEP for any paper notification. This exception must be requested by completing the Hardship Request form, DEEP-UST-Paper Filing-Hardship Request Form.

UST Notification, Compliance and Release Prevention

The Connecticut Department of Energy and Environmental Protection is an Affirmative Action/Equal Opportunity Employer that is committed to complying with the requirements of the Americans with Disabilities Act. If you are seeking a communication aid or service, have limited proficiency in English, wish to file an ADA or Title VI discrimination complaint, or require some other accommodation, including equipment to facilitate virtual participation, please contact the DEEP Office of Diversity and Equity at 860-418-5910 or by email at deep.accommodations@ct.gov. Any person needing an accommodation for hearing impairment may call the State of Connecticut relay number - 711. In order to facilitate efforts to provide an accommodation, please request all accommodations as soon as possible following notice of any agency hearing, meeting, program or event.

Content last updated April 2024

Underground Storage Tanks (2024)

FAQs

How many underground storage tanks are there? ›

There are more than 553,000 USTs nationwide storing petroleum and other hazardous substances.

How deep are underground storage tanks buried? ›

The depths to the top of an underground storage tank can vary depending on its type and purpose. However, average top-of-tank depths are roughly 2 feet to 3 feet below the ground surface. Regardless, modern fuel tanks are stronger and have depth ratings up to 5 feet below the ground surface.

What do you do if you identify an underground storage tank? ›

If you do discover a UST on your land, stop your work immediately and assess the situation. If you determine that there is any chance whatsoever of a leak, here are a few steps to take, as recommended by the EPA: Try to stop and contain the leak as quickly as possible. Call your local or state regulatory agency.

What percentage of underground storage tanks leak? ›

It is a massive problem. About 60 percent of all underground storage tanks (USTs) have experienced at least one leak and that remediation of the approximately 528,000 total leaks costs over $1 billion a year in state and federal funds.

How long do underground storage tanks last? ›

Just like vehicles and pieces of equipment, underground storage tanks (USTs) have a lifespan of their own and eventually need to be replaced. On average, tanks can last around 25 years. That said, if tanks are close to “retirement age” and show signs of corrosion and rust, then it's probably time to purchase new tanks.

Can underground storage tanks contaminate soil? ›

A typical leaking underground storage tank scenario involves the release of a fuel product from an underground storage tank that can contaminate surrounding soil, groundwater, or surface waters, or affect indoor air spaces.

How do you remove water from an underground storage tank? ›

The most effective way of removing water is to sweep the entire tank floor from multiple access points, not just a single point, and pump it into a holding tank to settle.

Why do underground storage tanks leak? ›

Corrosion of underground fuel systems is a major source of leaks. Old single-walled steel tanks without cathodic protection and steel pipelines are particularly susceptible. The risk of leaks due to corrosion depends on the: Age of the tank.

What is a common environmental problem with underground storage tanks? ›

The greatest potential hazard from a leaking UST is that its contents (petroleum or other hazardous substances) can seep into the soil and contaminate ground water, the source of drinking water for nearly half of all Americans.

What are the hazards of underground storage tanks? ›

The greatest potential hazard from a leaking UST is that the petroleum or other hazardous substance can seep into the soil and contaminate groundwater, the source of drinking water for nearly half of all Americans.

Where do storage tanks usually leak from? ›

One of the most common sources of leak, the inlet and the outlet are the openings where pipes connect to your tank. In cases like this, double check the intake and output connections to make sure it is the cause of leak. Once confirmed, a simple tightening by a pipe wrench will do the trick.

What is the life expectancy of a storage tank? ›

The Environmental Protection Agency (EPA) estimates that the average historical UST lifespan is close to 20 years based on the age at removal 1. Despite this, forty percent of operating USTs in the United States are more than 30 years old, which makes them susceptible to corrosion or possible leaks.

What is the primary environment hazard of underground storage tanks? ›

The greatest potential threat from a leaking UST is contamination of groundwater, the source of drinking water for nearly half of all Americans. EPA, states, territories, and tribes work in partnership with industry to protect the environment and human health from potential releases.

Where are underground storage tanks primarily found? ›

FedCenter - Underground Storage Tanks (USTs) USTs are primarily used for the storage of petroleum products. They are found at service stations, connected to boilers/steam generators, or connected to emergency generators.

How many types of storage tanks are there? ›

According to the material, storage tanks can be divided into metal tank and nonmetallic tank. Steel container for storing liquid or gas is called steel storage tank.

Do underground storage tanks contaminate groundwater? ›

Approximately 542,000 underground storage tanks (USTs) nationwide store petroleum or hazardous substances. The greatest potential threat from a leaking UST is contamination of groundwater, the source of drinking water for nearly half of all Americans.

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