1.1 This Standard covers the minimum general requirements for system design, equipment, material, installation, inspection / testing and commissioning of permanent cathodic protection systems, with a view to minimize corrosion from the external surface of on-grade steel tank bottom in contact with soil, by providing adequate external protection to new steel storage tank bottoms. 1.2 This document does not designate specific system design or practices for every application. Therefore, the CP system designer shall investigate all system requirements and other pre-design requisites such as tank design, tank bottom materials, tank size, etc.