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Underground Storage Tanks

An underground storage tank (UST) system is a tank and any underground piping connected to the tank that has at least 10 percent of its combined volume underground. The Office of Land Quality (OLQ) does not regulate every type of storage tank. OLQ regulations apply only to UST systems that store petroleum or certain hazardous substances. OLQ helps UST owners and operators understand the regulations in order to encourage and promote compliance.

Notification Requirements

Federal law requires UST owners to register all USTs storing regulated substances that are brought into use after May 8, 1986, or USTs in the ground as of May 8, 1986 that have stored regulated substances at any time since January 1, 1974.

IDEM has updated the forms required for notification. (Forms and instructions are available on the IDEM Forms page.)

  • Initial Registration (State Form 56548):
    • This is the appropriate form to fill out if an UST facility in Indiana is going to register regulated underground storage tanks for the first time. Owners or operators are required to submit this form within 30 days of the date on which an UST system has been brought into service.
  • Notification for Underground Storage Tanks (State Form 45223):
    • Owners or operators of regulated USTs must fully complete and submit this form within 30 days of the date on which an UST system has been brought into service, acquired by a new owner, operator, or property owner, changed financial assurance mechanism, or had a system modification (includes an upgrade, temporary closure, repair and/or replacement). Owners or operators must provide information on the tank's ownership, size, type, location, age, uses, construction, installation, corrosion protection, piping, and release detection methods. Any person who sells a tank intended to be used as a UST must notify the purchaser of these notification obligations.
  • Thirty (30) Day Intent to Close (State Form 56553):
    • Owners or operators of regulated USTs must complete this form for any location prior to permanently closing registered underground storage tank systems.
  • Closure Report (State Form 56554):
    • This form must be completed fully, including necessary attachments, to satisfy the regulatory requirements in 329 IAC 9-6.

For tank installations, upgrades, testing, and permanent closures, a certified contractor must sign the form and provide his or her Indiana State Fire Marshal certification number.

System Closure

An underground storage tank (UST) system closure is an action that results in a tank no longer being regulated by the Office of Land Quality (OLQ). There are three types of closures.

  • Removal: All USTs, piping, and dispensers are physically removed.
  • In-place: A portion or all of the USTs, piping, and dispensers are closed without removal, often due to being inaccessible. This type of closure requires prior approval from OLQ.
  • Change-in-service: A UST system is converted from storing regulated substances to unregulated substances. This change requires prior approval from OLQ.

Fee Billing

As of July 1, 2014, OLQ collects tank fees based on a calendar year of January 1 to December 31. They are $90 per year for each regulated petroleum tank and $245 per year for each hazardous substance tank.

Operator Training

All of Indiana’s UST facilities must designate individuals as Class A, B, or C operators for various responsibilities of system operations. They must be certified in different aspects of system maintenance and operations. OLQ provides the required training and certification program for free through the Regulatory Services Portal. Please review the UST Operator Training Quick Start Guide [PDF] for more information.

Leaking Tanks

When a regulated UST has a leak or spill, OLQ is responsible for ensuring adequate investigation and cleanup of the resulting contamination. To guarantee that that a leaking tank and its affected area are properly addressed, state and federal laws require owners and operators of UST systems to have financial responsibility. The Excess Liability Trust Fund (ELTF) is a dedicated state trust fund that serves as a financial responsibility mechanism for UST owners and operators. It provides their federally mandated financial assurance and a source of money to pay for cleanup or compensate third parties for any injuries or damages associated with releases from regulated USTs. OLQ manages the ELTF in accordance with the rules in 328 Indiana Administrative Code 1 [PDF].

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