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Operation and maintenance of UST systems
  • UST systems must be designed, constructed, and installed in accordance with industry codes and standards and according to manufacturer’s instructions.
  • Owners and operators must use a UST system made of or lined with materials that are compatible with the substance stored in the system.

Proper underground storage tank (UST) management includes regular performance of operation and maintenance duties. Beyond ensuring proper compatibility and installation, these duties include operation and maintenance of corrosion protection as well as ensuring that correct filling procedures are followed.

UST systems must also be designed, constructed, and installed in accordance with industry codes and standards and according to manufacturer’s instructions. Find a list of industry codes and standards at www.epa.gov/oust/cmplastc/standard.htm.

Compatibility

Owners and operators must use an underground storage tank (UST) system made of or lined with materials that are compatible with the substance stored in the UST system.

Owners and operators must notify the implementing agency at least 30 days prior to switching to a regulated substance containing greater than 10 percent ethanol, greater than 20 percent biodiesel, or any other regulated substance identified by the implementing agency. In addition, owners and operators with UST systems storing these regulated substances must meet one of the following:

  • Demonstrate compatibility of the UST system (including the tank, piping, containment sumps, pumping equipment, release detection equipment, spill equipment, and overfill equipment by using one of the following options:
    • Certification or listing of UST system equipment or components by a nationally recognized, independent testing laboratory for use with the regulated substance stored; or
    • Equipment or component manufacturer approval, which must be in writing, indicate an affirmative statement of compatibility, and specify the range of biofuel blends the equipment or component is compatible with; or
    • Use another option determined by the implementing agency to be no less protective of human health and the environment than the options listed above.
  • Maintain records documenting compliance for as long as the UST system is used to store the regulated substance.