Can UST Systems Be Repaired?
In 2015, EPA revised the underground storage tank (UST) regulations. Below you will find requirements for tanks and piping, and spill, overfill, and containment sumps.
You can repair UST systems if the person who does the repair carefully follows industry codes and standards that establish the correct way to conduct repairs.
Tanks And Piping
Within 30 days of the repair, you must prove that the tank repair has worked by doing one of the following:
- Have the tank inspected internally or tightness tested following standard industry codes; or
- Use one of the monthly leak detection monitoring methods; or
- Use other methods approved by the regulatory authority.
Metal pipe sections and fittings that have released product as a result of corrosion or other damage must be replaced. Loose fittings can be tightened, and in some cases that may solve the problem.
Piping made of fiberglass-reinforced plastic can be repaired, but only in accordance with the manufacturer's instructions or national codes of practice. Within 30 days of the repair, piping must be tested in the same ways noted above for testing tank repairs (except for internal inspection).
Within 6 months of repair, USTs with cathodic protection must be tested to show that the cathodic protection is working properly.
2015 Requirement: Beginning on [effective date of regulation], within 30 days of repairs to secondary containment areas of tanks and piping where the secondary containment area is used for interstitial monitoring, you must test the secondary containment for tightness. The test must be according to manufacturer’s instructions, a code of practice developed by a nationally recognized association or independent testing laboratory, or according to requirements established by the implementing agency.
2015 Requirement For Spill, Overfill, And Containment Sumps (beginning on [effective date if regulation])
Within 30 days of repairing any spill or overfill prevention equipment, owners and operators must test or inspect the equipment according to the operation and maintenance requirements, as appropriate, to make sure it is operating properly.
Within 30 days of repairing any containment sumps used for interstitial monitoring of piping, owners and operators must test the containment sump to make sure it is tight. The test must be according to manufacturer’s instructions, a code of practice developed by a nationally recognized association or independent testing laboratory, or according to requirements established by the implementing agency.
You must keep records for each repair until the UST system is permanently closed or undergoes a change-in-service.