The floor of a steel aboveground storage tank must be protected from corrosion using one of the following methods:
the tank is elevated so that the underside of the tank floor is not in contact with any surface other than the tank supports;
the tank rests on a continuous concrete slab that is designed to prevent water from accumulating under the tank floor;
A steel line must be protected from external corrosion using one of the following methods:
Cathodic protection of new steel tanks and lines must meet the following design criteria:
the cathodic protection system must be designed by a corrosion expert in accordance with American Petroleum Institute Standards 651 and 1632, as applicable; and
underground lines and the underside of the floor of a shop-fabricated steel tank must be coated with dielectric material in accordance with Steel Tank Institute Recommended Practice R893-89.
MS s 115.03
23 SR 883; 25 SR 556
October 2, 2007
Official Publication of the State of Minnesota
Revisor of Statutes