Above ground gasoline storage apparatus

Claim 1

An above ground storage apparatus for a dangerous liquid comprising an inner compartment having impervious top and side wall portions defining a chamber for receiving the dangerous liquid, a layer of closed cell insulation material secured to and covering a surface of said side wall portion of said inner compartment, an outer compartment having top and side wall portions enclosing the respective top and side portions of said inner compartment and spaced therefrom, a body of non flammable aqueous liquid confined in the space between said inner and outer compartments, said body of non flammable aqueous liquid surrounding the side wall portion of said inner compartment and being in heat transfer relationship with said insulation layer covering said surface of said side wall portion of said inner compartment, first vapor vent means provided in the outer compartment and disposed above the body of non flammable liquid for venting vapor from said outer compartment to the atmosphere, second vapor vent means provided in the inner compartment and disposed above the dangerous liquid for venting vapor from said inner compartment to the atmosphere, said body of aqueous liquid being confined as a normally static body in the space between said inner and outer compartments so that the body of aqueous liquid dissipates heat essentially by absorption and evaporation in the space between the outer and inner compartments, said first vapor vent means venting vapors resulting from evaporation of said aqueous non flammable liquid to the atmosphere while said body of non flammable aqueous liquid is evaporating and said second vent means venting any vapor resulting from evaporation of the dangerous liquid in the inner comporatment to the atmosphere, said body of non flammable aqueous liquid limiting the heat transferred to the closed cell insulation on the inner compartment while said body of non flammable aqueous liquid is evaporating, and said closed cell insulation further limiting transfer of heat from said body of non flammable aqueous liquid to said dangerous liquid in said inner compartment.