Abstract: A leak detection system having a tank with a tank bottom and a containment baffle disposed above the tank bottom defining a containment space therebetween. The containment baffle supports a stored material within the tank. An inert gas supply is connected to the containment space for passing an inert gas into the containment space. An inert gas flow sensor is interactive with the inert gas supply so as to sense the flow of inert gas into the containment space. An alarm is connected to the inert gas flow sensor so as to produce a humanly perceivable signal in relation to gas flow above a predetermined limit. A leak detector is also provided interactive with the containment space for detecting and sending signals in relation to the presence of materials within the containment space. A pressure regulator is interactive with the inert gas supply so as to limit the pressure of inert gas within the containment space.

Abstract: An apparatus for holding stored material and for containing and detecting leaks of the stored material from the apparatus having a tank, a containment baffle, and a leak detection system. The tank includes a tank bottom having a continuous surface for supporting the stored material. A shell surrounds such stored material. The shell is disposed above the continuous surface of the tank bottom in continuous sealing contact therewith. The containment baffle is a baffle plate having a continuous surface for supporting the stored material. The baffle plate is disposed above the tank bottom and within the shell. The baffle plate is in continuous sealing contact with the shell so as to form a containment space between the baffle plate and the tank bottom. The baffle plate is rigidly supported above the tank bottom. A fill of aggregate material is interposed between the baffle plate and the tank bottom for structural support of the baffle plate.

Abstract: A double containment and leak detection apparatus and method including a tank having a bottom and a surrounding shell, with a containment baffle above the bottom and a leak detector in a containment space between the containment baffle and the tank bottom. The containment baffle includes a baffle plate sealingly joined to the interior of the shell to form a sealed containment space between the containment baffle and the bottom. The leak detector is installed in the containment space to detect the presence of stored material held in the tank in the event such material leaks into the containment space. The leak detection means is connected, through a leak-proof access, to means external to the tank for responding to such leaks of stored material so detected inside the containment space. The invention further includes a primary containment, made of liner material, located inside the tank above the containment baffle and within the shell, capable of containing such stored material.

Abstract: A double containment and leak detection apparatus including a tank, having a bottom and a surrounding shell, with a containment baffle means above the bottom and a leak detection means in a containment space between the containment baffle means and the tank bottom. The containment baffle means includes a baffle plate sealingly joined to the interior of the shell to form a sealed containment space between the containment baffle and the bottom. The leak detection means is installed in the containment space to detect the presence of stored material held in the tank in the event such material leaks into the containment space. The leak detection means is connected, through a leak-proof access, to means external to the tank for responding to such leaks of stored material so detected inside the containment space.