scope:

This standard is intended to serve as a guide for establishing minimum requirements for the control of external corrosion on UST systems that are buried, partially buried, or in contact with the soil.

This standard does not designate specific practices for every situation because the complexity of some environmental conditions in which systems are buried precludes standardization of corrosion control practices.

This standard does not include corrosion control methods based on chemical control of the environment, internal linings, or the use of tank construction materials other than mild steel.

This standard does not override applicable safety codes and should not be used to infringe on the primary requirement of protecting personnel, the environment, and equipment. In any situation, the corrosion protection design for underground structures should incorporate all requirements of any applicable codes, standards, and regulations as determined by authorities having jurisdiction.

The provisions of this standard shall be applied under the responsible direction of competent individuals. Such individuals must either be registered professional engineers, NACE International Certified Corrosion Specialists or CP Specialists, or individuals qualified by professional education and related practical experience. All of the above individuals must be able to demonstrate suitable experience in corrosion control of UST systems.

Deviation from this standard may be warranted in specific situations provided the objectives expressed in this standard have been achieved.