You should routinely inspect your tank visually every time you fill it for potential leaks or damage that may have developed from external unknown factors or normal wear. A thorough visual test should be conducted at least annually, which includes checking all fittings for visual damage or leakage, inspecting the tank wall for small stress cracks or potential damage caused from stresses of loading from piping or valves, mechanical wear from mixers or pumps or exposed edges where the tank may be hanging over a ledge or corner. Liquid found around the base of a tank does not necessarily mean your tank is leaking. Most of our vertical tanks have a convex (dished) bottom that pops up in the center of the tank floor. If condensation forms on the tank, it tends to migrate to the bottom and underneath the tank. When the tank is filled, the bottom flattens out and forces trapped moisture out the sides, appearing to be a leak. Likewise, if a tank is overfilled or you have a loose or leaking tank fitting or piping connection on the top or side of the tank, the liquid will also migrate underneath the tank and appear somewhere else on the tank. Careful inspection of these possibilities is important to consider before assuming your tank is actually leaking. If you are not sure, give us a call and we will do our best to help you determine if your tank is leaking and if so, if it can be repaired.

Source: FAQs - Peabody