Abstract: An underground storage tank with backfill deflectors is provided to permit installation of the storage tank underground without requiring any workers to enter the excavation. The backfill deflectors are preferably elongate, and generally the same length as or longer than the storage tanks with which they are used and are installed on the bottom of the excavation on either side of the tank. The deflectors have walls which are sloped or inclined in a direction which tends to direct backfill dumped thereon underneath the storage tank. Desirably, the deflectors direct the backfill under the tank without requiring any of the workers to enter the excavation to shovel the backfill underneath the lower portion or haunches of the tank. After a sufficient level of backfill is introduced into the excavation and directed under the tank by the deflectors, the backfill is vibrated to achieve a compacted backfill under the tank which is sufficient to support the tank.

Abstract: An above ground storage container assembly comprises a steel tank for volatile liquid housed within a concrete vault. The walls of the vault are spaced from the tank to provide an air envelop around the tank. The air envelop is vented to prevent the tank from rusting or corroding. Lifting bars are anchored in the vault so that the entire assembly may be raised. A spill trap surrounds the fill opening from the tank and also surrounds a drain hole with removable plug.

Abstract: A pressure relief venting lid for sealing an opening and providing pressure regulation of a container. The lid has a support plate attached by four angularly spaced spring assemblies to a port cover for sealing a filler opening in a manway cover for the container. The support plate overlies the port cover for fixedly supporting the spring assemblies and cover while protecting the springs and cover from impact or shock. The spring assemblies are disposed between the support plate and port cover for sealing the cover against the opening and allowing the cover to unseat from the opening to regulate the pressure within the container. The spring assemblies are offset equal distances from the center of the port cover to minimize bending moments that the cover may be subjected to. The generally circular port cover has a convex dished portion for strengthening the port cover to maintain the seal with the opening while under load.

Abstract: A peninsula which extends outwardly from a wall of a container for receiving and supporting a fluid-dispensing pump thereon for dispensing liquid in the container. The peninsula has a pump mounting platform surface that is elevated above ground level and set back from an outer edge of the peninsula for preventing another object from colliding with the pump. An upraised curb, which includes a pair of outwardly extending walls and an interconnecting rear wall, borders the sides and rear of the platform surface to shield and support the pump. The peninsula has a sump basin in the platform surface that is positioned underneath the pump for collecting leaking fluid from the pump and associated piping and containing the fluid in an environmentally safe manner.

Abstract: A storage container unit comprises an inner tank for containing a hazardous liquid disposed within an outer tank. The side wall of the inner tank is spaced radially inwardly of the side wall of the outer tank to provide an annular air chamber. The top wall of the inner tank has a radially outwardly extending annular lip which overlaps an annular flange on the upper edge of the said wall of the outer tank to close the air chamber. The outer tank and air chamber provide a secondary dike against the escape of hazardous liquid, and also prevents accidental contamination of the annular space.

Abstract: A dual compartment liquid storage tank has a bottom wall, an annular side wall extending upwardly from the bottom wall and a top cover, to define an interior space. A bulkhead extends across the interior space to divide it into two separate compartments completely isolated from one another. The bulkhead is arcuately curved about a vertical axis and is marginally sealed to the bottom and side walls and top cover to prevent transmission of liquid from one compartment to the other. The curved configuration of the bulkhead withstands pressure differentials due to unequally filled compartments without buckling or distortion or failure of the seals, more effectively than a flat bulkhead.

Abstract: An above ground storage facility for volatile and inflammable liquids which includes a concrete vault formed as a base and cylindrical upstanding walls on or integral with said base. An inner liquid container formed of metal has a metal base resting on ribs of the vault base to space the metal container from the vault base. Cylindrical walls of the liquid container are sealed to and rise from said metal base. The walls of the metal container are spaced inwardly from the inner surface of the vault walls to leave an annular envelope of air around the metal container. A conical roof is secured and sealed to the upper edges of the metal cylindrical walls and the roof has peripheral edges which overlie and are spaced from the upper edges of the concrete wall and the annular air envelope around the steel container.

Abstract: A bottom configuration for large liquid storage bins and drums which facilitates bottom draining and full recovery of contents including tributory passages leading to a central sump and a deeper clearing passage leading from the sump to a drain outlet.