Regulations for USTs

Note - The regulations shown here apply to underground storage tanks (USTs) that are greater than 1100 gallons, and are recommended for smaller tanks as well. Check for additional requirements in your state.

REGULATIONS FOR EXISTING USTs: By 22 December 1998, all existing underground storage facilities must comply with one of the following requirements:

  1. REPLACE the existing system with a new system that meets the performance standards,

  2. CLOSE the existing system, making sure to follow regulations for permanent closure, or

  3. UPGRADE the existing system to meet requirements for tanks, pipes, and spill and overfill prevention equipment.

Steel tanks must be upgraded with corrosion protection by one of the following methods in accordance with codes developed by a nationally recognized association or independent testing laboratory:

  1. Interior lining may be installed. Within 10 years of the initial lining and every 5 years thereafter, the upgraded internal lining must be inspected and found structurally sound and performing up to original design specifications.

  2. Cathodic protection may be used if the protection system meets the required regulations.

  3. Internal lining and cathodic protection can be combined if both methods are installed according to the proper regulations.

Metal piping that regularly contains product and is in contact with the ground must be cathodically protected according to approved regulations.

All existing underground storage facilities must comply with the new system spill and overfill prevention equipment requirements

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