Abstract: An underground secondary containment system that is preassembled to a large extent at a manufacturing site prior to shipping to the site of installation. In this manner, the time expended at the site of installation in installing the underground secondary containment system is reduced. The underground secondary containment system includes a double walled fuel storage tank having isolated adjoining compartments for storing two different grades of fuel. A pair of dispenser sumps are mounted on the fuel storage tank at opposite ends thereof. A pair of tank sumps are mounted on the fuel storage tanks above the corresponding compartments. Each tank sump is connected to each of the dispenser sumps via flexible piping which extends along the exterior of the fuel storage tank. In this manner, two different grades of gasoline can be provided to each dispenser without utilizing piping disposed internally of the fuel storage tanks.

Abstract: This invention includes repair of an existing underground sump without the need for costly and time consuming excavation. A plurality of liner-forming pieces are placed inside the underground sump to create a liner preferably substantially conforming to the interior dimensions of the sump. The pieces are joined together to form a unitary containment shell by first taping and then using fiberglass cloth and fiberglass resin. A layer of gel-coat is applied to the surface of the shell to create a fluidtight containment chamber within the sump. Some of the liner-forming pieces can have openings formed therein to accommodate the pipe entries corresponding to those in the sump.

Abstract: A sump-riser performing as a collection sump, as a riser for the corresponding tank and as a means for secondary containment for the tank's submersible pump, manway, and fittings. The sump-riser comprises a generally cylindrical sump base with an upright annular lip extending upwardly from an upper support surface; an extension riser including a lower annular riser lip which fits over and round the lip of the sump base; a cover for the extension riser; and an access or observation lid. The riser extension is detachable or removable from the sump base and may be inverted and inserted into the sump base for compact shipping. Score lines may be provided on the riser extension to serve as cutting guides for proper sizing and the sump base may be multi-sided to provide flat walls for accurate hole drilling for pipe and conduit entry.

Abstract: A fluid storage vessel and providing spacing protrusions for creating interstitial spaces to permit fluid flow about the outer wall of the inner tank to a collection zone where leaked fluid may be detected. Leak detection devices are provided to determine if the inner tank is leaking fluid. A sump base is formed during the rotomolding process to create a secondary containment layer including a sump base of one-piece construction. The sump base includes entry ports for facilitating the insertion of conduit to access the fluid stored in the fluid storage vessel. The method used to create the secondarily contained fluid storage vessel includes a rotomolding process which provides a seamless construction and eliminates mechanical connections of either the outer shell or the sump base and the shell.

Abstract: System for vapor recovery without formation of fluid blockages includes a vapor source, a fluid collection tank for collecting vapor, and a vapor recovery pipe extending between and fluidly collecting the vapor source and the fluid collection tank. The vapor recovery pipe slopes vertically downwardly from the vapor source to the fluid collection tank so that vapor flows into the fluid collection tank. The vapor recovery pipe has a main tube and an auxiliary tube disposed adjacent to the main tube. The vapor recovery pipe is engineered and is installed in such a manner that the vapor recovery pipe resists bending in a substantially vertical plane and allows bending in a substantially horizontal plane. Accordingly, the vapor recovery pipe according to the invention can be installed without surveying equipment, overcomes surface irregularities, and by resisting bending in a vertical direction ensures that no fluid blockages are formed along the length thereof.

Abstract: System for vapor recovery without formation of fluid blockages includes a vapor source, a fluid collection tank for collecting vapor, and a vapor recovery pipe extending between and fluidly collecting the vapor source and the fluid collection tank. The vapor recovery pipe slopes vertically downwardly from the vapor source to the fluid collection tank so that vapor flows into the fluid collection tank. The vapor recovery pipe has an elongated cross section, and a direction of elongation of the cross section extends substantially vertically. The vapor recovery pipe is engineered and is installed in such a manner that the vapor recovery pipe resists bending in a substantially vertical plane and allows bending in a substantially horizontal plane. Accordingly, the vapor recovery pipe according to the invention can be installed without surveying equipment, overcomes surface irregularities, and by resisting bending in a vertical direction ensures that no fluid blockages are formed along the length thereof.

Abstract: A pipeline system is provided for a pumping system for fluid products, such as gasoline, diesel fuel and chemicals, and including a pump for pumping such products from a storage tank through through the primary pipeline of the pipeline system to a product dispenser. The pipeline system includes a secondary containment system for the primary pipeline between the tank and dispenser which includes telescoping pipe sections of different diameters. The telescoping piping is installed around the primary pipeline and the pipe sections are, prior to final installation, movable between intermediate and final positions, for enabling completion, testing and inspection of the primary pipeline prior to final completion of the secondary containment system. One section of the telescoping piping is a flexible corrugated pipe which is able to bend around elbows. Compression seals and ring clamps are used to connect the components together.

Abstract: Fluid collection system for installation underground includes a first housing having a top, a wall extending downwardly from the top, and a first pipe-receiving opening in the wall at a predetermined vertical distance from the top. There is a second housing spaced apart from the first housing that has a top, a wall, and a second pipe-receiving opening in the wall. A number of interconnected segments is defined in the wall of the second housing. A pipe extends between the first and second pipe-receiving openings that has a slope great enough to cause fluids to flow along the pipe from the second housing to the first housing. The slope of the pipe is determined by a ratio defined by the length of the pipe and the difference between the predetermined vertical distance of the first housing and the variably fixed vertical distance of the second housing.

Abstract: A reducer seal assembly for providing a fluid-tight through-wall fitting. The seal includes a substantially rigid tubular supporting member having a flange extending radially about one edge. The flange and the interior of the supporting member are covered with resilient material. The supporting member is externally threaded so that a nut may be joined thereto. The resilient member coating the flange of the support member may be curved to conform to a convex wall surface. The resilient member extends beyond the supporting member for connection about a conduit extending through the wall. The assembly is connectable to a wall by first inserting the support member through a wall from the exterior side and then the nut is applied to the threaded portion of the support member to the extent that the resilient coating has compressed to form a fluid-tight seal between the coating and the exterior wall surface.

Abstract: A sump riser apparatus for a pipeline system includes a hollow sump base including a upstanding annular portion disposed on an upward surface thereof in surrounding relation to an opening formed in that surface. A hollow detachable riser extension is mounted on the sump base and is of a size and shape, relative to the sump base, such that, when the riser extension is inverted, the riser extension can be received within the sump base for storage therein during transportation of the parts. The riser extension includes a cover and an annular step portion at the base thereof which fits over and around the upstanding annular portion of the sump base. The step portion is of a size and shape relative to the cover so as to enable receipt of the cover therein when the riser extension is inverted.

Abstract: A secondarily contained piping system has two spaced access chambers interconnected by a secondary containment pipe to provide a sealed housing for a flexible fluid supply pipe, the ends of which are disposed within the access chamber and have a connector element at each end forming a section adaptable to be interconnected to other fluid conduits, the diameter and bending radius of the fluid supply pipe and the size of the access chamber permitting the fluid pipe after uncoupling to readily be removed from the secondary containment pipe through one of the access chambers.