Above Ground Storage Tank or AST

Above Ground Storage Tank or AST Common Questions

 

Above Ground Storage Tank or AST, like an Underground Storage Tank (UST), contain heating oil for the purpose of heating homes and buildings. There are specific differences between the two tanks and these are some of the most common questions we are asked regarding ASTs.

What is an above ground storage tank or AST?

Homes, apartments, farms and some businesses that are currently or were heated using diesel heating oil, used an above ground storage tank (AST) to store the heating oil. ASTs are most commonly mounted on a stand or a ground pad either outside or in a basement. ASTs can also be partially buried in the ground, usually in a basement or crawlspace.

Since it isn’t underground, do I really need to be worried about an AST?

Yes, even above ground tanks can leak, resulting in contamination of soil and drinking water supplies. Any oil spill can pose a serious threat to human health and the environment, regardless of where the tank is located.

What is the difference between an AST and a UST?

The distinct difference between the two tanks is this:

  • If the tank and its piping is located 10% BELOW ground surface it is considered a UST, anything ABOVE 10% ground surface is considered an AST.
  • Another exception is that, ASTs are not regulated by the DEQ, therefore not governed the same way as a UST.

For example, if a UST is leaking above 50 PPM (parts per million) the contractor is required to report this to the DEQ and is subject to remediation, based on the level of contamination. After the clean-up has been completed, the UST is then decommissioned and registered with the DEQ. This scenario can also be compared for an out of service underground storage tank, once the tank has been decommissioned it can then be registered with the DEQ.

The circumstances for an AST are different. When an AST is or has leaked, is no longer in-service, or the homeowner is switching to a new heat source, the tank can simply be removed, no decommissioning or registration with the DEQ is required. However, like decommissioning an underground storage tank, each AST removal can bring about a different set of considerations.

What to do with an Above Ground Storage Tank AST when decommissioning is not an option

If you don’t decommission and register the AST with the DEQ, what do you do?

First, we would need to determine where is the tank located?

  • Outside the home
Above Ground Storage Tank or AST

Above Ground Storage Tank or AST – Exterior AST secured to concrete pad foundation.

  • In a basement or crawlspace, with a separate exterior access
Above Ground Storage Tank or AST

Above Ground Storage Tank or AST – AST located in basement with exterior access.

  • In a basement or crawlspace, with access through the home only
Above Ground Storage Tank or AST

Above Ground Storage Tank or AST – AST located within a crawlspace, no exterior access. For this AST to be removed, it will need to be cut into pieces.

Regardless of where the above ground storage tank or AST is located on your property, it is very important to have it removed by a licensed contractor with pollution insurance. If the AST is removed by a general contractor, and they usually DO NOT have pollution insurance, and heating oil is spilled in the house or the yard, the homeowner will be left with the clean-up, not the contractor.

Once the location has been determined:

  • All heating oil and sludge are pumped out, the tank removed and disposed of via recycling.
  • Depending if the tank is on the exterior or interior of the home determines if the tank can be removed as one piece or if it will need to be cut into portions and carried out of the home.
  • If applicable, the fill and vent are removed and holes would be patched.
    • Removing or concreting over the fill eliminates the possibility of an accidental fuel re-fill.
Above Ground Storage Tank or AST

Above Ground Storage Tank or AST – AST Vent (the larger pipe) and fill pipe.

When an Above Ground Storage Tank (AST) Leaks

What would cause an AST leak?

There are numerous reasons an AST can leak; improperly secured tanks, tank corrosion, equipment or support failure, overfilling the tank, or it could be as simple as human error.

Above Ground Storage Tank or AST

Above Ground Storage Tank or AST – Tank that has fallen down, if the contents are not pumped out, diesel fuel would be leaked into the yard.

My AST is leaking, what should I do?

  • Place a bucket underneath the tank to catch the release
    • If the AST is within the home, block all floor drains to prevent discharge into a drywell or sewer
  • Call a qualified heating oil tank provider that can respond to and clean-up a leaking tank
    • The AST would be pumped of all residual liquids
    • Clean-up would be performed to remove any heating oil contamination
Above Ground Storage Tank or AST

Above Ground Storage Tank or AST – Leaking AST, small bowl has been placed underneath the leak to catch the heating oil.

PLIA in Washington State

PLIA Insurance Coverage

In 1995 the Washington Legislature added pollution liability coverage for heating oil tanks to PLIAs responsibilities. PLIA in Washington State assists owners of underground storage tanks to provide available and affordable insurance through a state administered reinsurance program. The program was created in response to the rising number of heating oil tank releases and the significant impact contamination had on property values, as well as the environment. When a clean-up has been completed, PLIA will provide homeowners with a Letter of Finding which states that the site has met the clean-up standards defined in the Model Toxics Control Act.

PLIA can also assist homeowners with the following information:

  • Verifying the validity of required declarations of financial responsibility
  • Provide advice and technical assistance regarding liability and clean-up requirements

What is covered when insured through PLIA?

  • Up to $60,000 to clean-up contamination, not covered by other insurance, on your property and/or a neighboring property
  • The contamination must come from a leak that starts after a heating oil tank is registered with PLIA. The tank may be a UST or an AST
  • The tank must be registered in the current owners name
  • Reimbursement up to $1500 to repair damages on neighboring property (third party coverage) such as landscaping, flooring, painting, etc.

What is NOT covered through PLIA?

  • Leaks from abandoned or previously decommissioned tanks
  • Leaks that start before registering with PLIA
  • Property restoration on your property (first party coverage)
  • Removal/repair/replacement of the tank/lines/furnace
  • Emergency heat restoration
  • Heating oil lost in the release

How do you apply for insurance through PLIA?

  • No cost to register
  • Must complete and submit to PLIA the PLIA registration form
  • You must be registered with PLIA prior to the start of any accidental release in order for the clean-up to be covered
  • When PLIA receives the completed registration form, you will be mailed a confirmation. If confirmation is not received within 14 days, contact PLIA at 1-800-822-3905 or 360-407-0520

How to file a claim through PLIA

  • If a release is suspected or confirmed from your registered heating oil tank, PLIA must be contacted at 1-800-822-3905 or 360-407-0520 within 30 calendar days from the date the tank is disconnected from the furnace.
  • PLIA will investigate the claim, which may include taking photos of your property and the failed tank
  • Owner will hire an approved contractor to do the clean-up
  • All work must be approved by PLIA before the work starts

Who is the Policy through?

  • The Pollution Liability Insurance is covered through The Colony Insurance Company, please click the link to read about the WA Pollution Liability Policy

PLIA Insurance Coverage and Soil Sampling

How to get started, obtaining soil samples through a site assessment

  • The heating oil tank owner must select a service provider to perform the site assessment and is responsible for payment of all costs associated with soil sampling.
  • PLIA will interpret and provide a report to the owner with the results of the soil testing. Each report will provide the following information:
    • No apparent contamination that poses a threat to human health and the environment, no further action is required.
    • Minor contamination is present at the site and further site assessment or clean-up may be required.
    • Serious contamination is present, appears to pose a threat to human health and the environment, immediate corrective action is required.

What are the costs associated with the insurance through PLIA?

  • PLIA in Washington State insurance coverage is required to collect from the tank owner, requesting technical assistance, the costs incurred in providing assistance.
  • Costs incurred may include travel costs and expenses associated with monitoring site assessments, review of reports and analyses and preparation of written opinions and conclusions.
  • The Technical Assistance cost is $350.00 and must be paid in full prior to PLIA issuing its report of review and assessment of data.

Additional PLIA informational websites:

Heating Oil Technical Assistance Program (HOTAP) through PLIA Insurance Coverage

If a tank owner DOES NOT have insurance through PLIA, and it is determined that their tank is leaking, is there anything that PLIA can assist with?

Yes, even if the leaking tank is not covered by the Heating Oil Insurance Program through PLIA, a homeowner can request assistance on tank removal and environmental clean-up under the Heating Oil Technical Assistance Program (HOTAP).

How can HOTAP help my uninsured leaking UST?

Through HOTAP, PLIA can provide advice and technical assistance to owners of active or abandoned heating oil tanks if contamination resulting from a release is suspect. Advice and assistance may include:

  • Review of clean-up plans and reports
  • Interpretation of results from soil sampling through a site assessment or site check
  • An opinion letter from PLIA to the owner regarding the results of the testing

How does HOTAP work?

  • The owner of the UST will perform soil sampling, through a site check or site assessment. The owner of the tank may chose a service provider of their choice to perform any and all site work at the property. The tank owner is responsible for payment of all costs associated with soil sampling, site assessment and remediation.
  • Once sampling has been completed, the results of all testing must be forwarded to PLIA for review and evaluation. A copy of the service provider’s field notes must also be forwarded to PLIA.
  • If testing and remediation has been completed prior to PLIAs review, PLIA will consider providing a review and evaluation of the data. PLIA considers how recently the testing and remediation was completed and will consider the methods of the assessment prior to agreeing to review and evaluate the results.
  • Upon completion of review and evaluation, PLIA will provide an opinion letter informing the owner of the review and assessment of the data. The opinion letter from PLIA will provide the following opinions:
    • Property Further Action Opinion Letter– further remedial action is necessary at the property to clean-up contamination and remediation action is also necessary elsewhere at the site
    • Property No Further Action Opinion Letter – no further remedial action is necessary at the property to clean-up contamination at the site and that further remedial action is still necessary elsewhere at the site
    • Site Further Action Opinion Letter – further remedial action is necessary to clean-up contamination at the site
    • Site No Further Action Opinion Letter – no further remedial action is necessary to clean-up contamination at the site

What is the cost for HOTAP?

The fee for the Heating Oil Technical Assistance Program is $350.00. This fee covers the cost incurred in providing advice and assistance, expenses, review of reports and analysis, and preparation of written opinions and conclusions. The fee must be paid in full prior to PLIA issuing its report of review and assessment of data.

As a homeowner, I’ve discovered my tank has leaked but I’m not registered with PLIA.  I can now register in the HOTAP program to receive a review of the testing results and a letter from PLIA “closing the site”?  This is at a cost of $350?  All other out-of-pocket expenses; sampling, remediation, etc. come out of my pocket?

Yes, to all three questions.

My leaking tank is not registered with PLIA and I opt NOT to join HOTAP, as long as I’ve registered with Ecology I’m fine, correct?

No, the site still needs to be addressed and remediation is required. If a homeowner would like a letter stating the site has been closed through PLIA, they would need to enter into the HOTAP program.

I’m selling my home and the buyer has performed a tank search, and a tank has been found. Can I now register the abandoned tank with PLIA?

No, abandoned tanks CANNOT be registered with PLIA  in Washington State. Only active tanks are eligible for the program.