초록 ▼

A secondary containment and drainage system for an above-ground storage tank is described, in which small quantities of leaked or overflowing liquid are temporarily stored in a housing above the internal storage tank. This fluid can be easily removed from the housing for re-use or at least removed w

A secondary containment and drainage system for an above-ground storage tank is described, in which small quantities of leaked or overflowing liquid are temporarily stored in a housing above the internal storage tank. This fluid can be easily removed from the housing for re-use or at least removed without the time consuming process of emptying and cleaning the overfill dike that surrounds the tank. When greater quantities of liquid leak from the input port of the storage tank, the overflowing liquid is drained into the dike through a drainage pipe that extends from the housing, through the internal storage tank, and into the dike. The dike is enclosed by a roofing structure that forms a seal to prevent contamination when liquid is drained into the dike.

대표청구항 ▼

[ What is claimed:] [1.]1. An above-ground storage tank apparatus comprising:(a) an internal storage tank for storing liquid received through an input port protruding therefrom;(b) a secondary containment vessel surrounding the internal storage tank;(c) a drain pipe extending through and protruding

[ What is claimed:] [1.]1. An above-ground storage tank apparatus comprising:(a) an internal storage tank for storing liquid received through an input port protruding therefrom;(b) a secondary containment vessel surrounding the internal storage tank;(c) a drain pipe extending through and protruding from the internal storage tank at a first and second location; and(d) a spill box connected to the internal storage tank and surrounding the input port and the drain pipe protruding from the internal storage tank;wherein the spill box stores a first quantity of liquid that is spilled while the internal storage tank is being filled; andamounts of liquid greater than the first quantity of liquid are drained from the spill box through the drain pipe and into a containment area between the secondary containment vessel and the internal storage tank.