(a) Any portion of a tank or its piping system that is in contact with the soil must be protected from corrosion by a properly engineered, installed and maintained cathodic protection system in accordance with recognized standards of design, such as:
- (1) American Petroleum Institute Publication 1632-2002, Cathodic Protection of Underground Petroleum Storage Tanks and Piping Systems;
- (2) National Association of Corrosion Engineers Standard RP0193-2001, Recommended Practice of External Cathodic Protection of On-Grade Metallic Storage Tank Bottoms;
- (3) National Association of Corrosion Engineers Standard SP0169-2013, Control of External Corrosion of Underground or Submerged Metallic Piping Systems;
- (4) National Association of Corrosion Engineers Standard SP0285-2011, Control of External Corrosion on Metallic Buried, Partially Buried, or Submerged Liquid Storage Systems; and
- (b) Approved or listed corrosion-resistant materials or systems include special alloys, fiberglass reinforced plastic, or fiberglass reinforced plastic coatings.
- (c) Piping systems for liquids, both aboveground and underground, that are subject to external corrosion must be protected.
Renumbered from 165:26-3-80 at 23 Ok Reg 2297, eff 7-1-06
Amended at 25 Ok Reg 2187, eff 7-11-08
Amended at 33 Ok Reg 615, eff 8-25-16
Amended at 34 Ok Reg 958, eff 9-11-17