(a) Corrosion protection for AST bottoms that were installed on or after April 25, 1997 and are in contact with the soil shall:
- (1) Consist of a sacrificial anode system or an impressed current system designed, fabricated, and installed in accordance with API 651 or NACE SP-0285;
- (2) Be designed and installed with oversight by a corrosion expert;
- (3) Be designed to provide corrosion protection for the expected active life of the AST system or to allow for the periodic rehabilitation of the anode system; and
- (4) Have a test station or other method of monitoring that enables the owner to confirm that the cathodic protection system is operating properly.
- (b) Corrosion protection for piping systems shall be designed and constructed in accordance with NFPA 30, API 1615, API 1632, or NACE SP-0169, as applicable.
- (c) With the exception of insulated tanks and insulated piping addressed as specified in Env-Or 306.07, 306.08, and 306.10, the exterior surfaces of all tanks and exposed piping shall be painted or coated to prevent corrosion or other deterioration.
Source. (See Revision Note at chapter heading for Env-Or 300) #10487, eff 2-7-14; ss by #14094, eff 10-4-24