Proper Underground Storage Tank and Piping Installation, Modification, Repair and Closure Process

new tank install in progress

  1. Obtain the services of a licensed installer, unless the owner/operator will conduct their own installation.
  2. A permit application form must be completed by either the owner/operator or the licensed installer and returned with the appropriate permit review fee, to DEQ at least 30 days before the installation is scheduled to begin. If all of the information requested on the permit application is not provided or the permit fee has not been enclosed with the application, DEQ may return the application or place it on hold until all information is received. A returned or on-hold application will result in a delay in the permitting process.

    The permit fee can be calculated from the following fee schedule. Please enclose the appropriate fee with the application.

    All tanks . . . . . . . . . . . $100/permit + $.02 x total gallons installed and closed
    (Includes all commercial tanks, even if under 1,100 gallons, including used oil tanks)

    Piping only . . . . . . . . $50/50 feet, greater than 50 feet $100.00 unless piping permit is associated with a major permit application

    Minor Permit Applications. . . . . . . .$50 unless associated with a major permit application

    Repairs, modifications, lining, vapor or groundwater monitoring wells at existing installation, cathodic protection at existing installation, leak investigation. . . $100/permit

    Maximum permit fee . . . . . . . . . . . . . . . . . . . . . . . $750

    Please make all checks and money orders payable to the Department of Environmental Quality - UST Section.
  3. Owners/operators who are installing their own tanks and/or piping must arrange for a Department inspector to inspect their work. An inspection fee deposit of $90 must accompany the application and inspection dates must be tentatively scheduled on the application. The fee deposit is for a 2 hour inspection. The actual inspection fee will be the fee deposit plus a $45 per hour fee for all hours over 2 hours, including travel time and inspection time.
  4. After the Department approves the application, the owner/operator will be issued a permit. The permit authorizes the installation of the tank/piping as described in the application; however, the permit may have special conditions written on it that must also be followed. A permit must be issued by the Department before installation begins.
  5. A permit expires six months from its date of issuance.  If the work cannot be completed within that time frame, the department may issue a written extension upon request from the installer/remover.

Other considerations for installation:

  1. The tank and piping system must meet all the design and leak detection requirements of the Montana Underground Storage Tank Rules and Regulations.  A permit application for the modification or installation of a cathodic protection system must be accompanied by designs prepared by a corrosion expert.
  2. The tank and piping system must be tested and installed in accordance with Division VI of the Uniform Fire Code.
  3. Installation procedures must also comply with all local permit requirements and local ordinances. Check with local health and fire departments prior to completing the permit application.
  4. If the proposed installation is in an environmentally sensitive area (in, or close to, groundwater or porous soils, near private or public water wells, etc.), we recommend that the best available leak prevention systems be installed. This will help minimize the potential liability and cost of a leak in the future. These systems could include the use of double walled tanks, vaults or excavation pit liners with monitoring well and leak detectors.

If you need more information concerning the installation or modification of underground storage tanks and piping or have questions regarding the permit application procedure,  email the UST Program, or call the Montana UST Program at (406) 444-5300.