Secondary containment and dual leak detection system

A dual leak detection system comprising:

• a tank having a tank bottom and a containment baffle disposed above the tank bottom, said tank bottom and said containment baffle defining a containment space therebetween, said containment baffle supporting a stored material within said tank, said containment space filled with an inert gas;
• an inert gas pressure sensor means interconnected with said containment space for sensing changes of inert gas pressure within said containment space, said inert gas pressure sensor means comprising:
• an inert gas supply connected to said containment space for passing an inert gas into said containment space;
• a pressure regulator interactive with said inert gas supply for limiting the pressure of the inert gas within said containment space;
• and
• an inert gas flow sensor connected between said inert gas supply and said containment space for sensing a flow of inert gas from said supply to said containment space;
• a leak detection means connected to said containment space for detecting and sending signals in relation to the presence of a liquid within said containment space;
• and
• monitor means connected to said inert gas pressure sensor means so as to produce a humanly perceivable signal in relation to changes in inert gas pressure within said containment space.

A system for detecting a leak in a containment space. comprising:

• a conduit having one end suitable for connection to an inert gas supply, said conduit including means for connecting another end to the containment space;
• a pressure regulator connected along said conduit, said pressure regulator for limiting a pressure of said inert gas as passing to the containment space;
• an inert gas flow sensor connected within said conduit for sensing a flow of inert gas through said conduit;
• and
• a monitor connected to said inert gas flow sensor for producing a humanly perceivable signal in relation to a sensing of a flow of inert gas through said conduit.