What code applies to impressed current cathodic protection of internal submerged steel water storage tanks?

The correct choice pertains to the code that specifically addresses the impressed current cathodic protection system for internal submerged steel water storage tanks. This code establishes standards and guidelines for the design, installation, and maintenance of cathodic protection systems to ensure the effective prevention of corrosion.

In this context, the system relies on impressed current to protect the internal surfaces of steel water tanks, which are particularly vulnerable due to their exposure to water and other environmental factors. Adhering to the specified code ensures that the installation meets safety, reliability, and performance criteria essential for the longevity of such structures.

The other codes listed do not directly apply to this specific application of cathodic protection for submerged steel water storage tanks. Thus, selecting the appropriate code is critical for compliance and successful corrosion prevention in these types of systems.