Abstract: A water collection system.

Abstract: An attached sump collar for an underground storage tank (UST) provides a flat surface for a connection with a fixture from the UST. Connecting the fixture at a flat surface of the sump collar advantageously improves the efficiency of the seal between the collar and the fixture. The connection may be made at a nearly right angle. In one embodiment, the seal is liquidtight, and the collar is used in combination with a liquidtight riser.

Abstract: A method for constructing a leak resistant concrete septic tank and the associated tank is provided. In one embodiment, the method includes pouring an integral tub having an integral tub cap and an integral tub sidewall. The integral tub may have a base attachment surface. Following pouring, the integral tub is cured. Once cured, the integral tub may be oriented to position the base attachment surface over a gravity base form. A base may be created in the gravity base form. The base attachment surface may be positioned at an integral tub set height from a bottom surface of the gravity base form. The base has a base thickness and a base ledge. The tub set height may be less than the base thickness. When the base is poured, a joint may be formed between the integral tub and the base. The formation of the joint encloses an influent chamber.

Abstract: A catch basin configured to allow selective positioning of the outlet and inlet ports on the side walls of the catch basin's receptacle body. At least one of the receptacle side walls comprise a slide opening having opposing sides. A slide member has a pair of slide edges that slidably engage the sides of the slide opening to substantially close the slide opening. The slide member has a port section and two or more positioning sections, with at least one positioning section located above the port section and one below the port section. The port section has an outlet or inlet port integral therewith or fixedly attached thereto or the port section comprises a mechanism for attaching an outlet or inlet port thereto, such as a port cutout having a removable knockout plate. The slide member has section removal indicators to identify which positioning sections should be removed.

Abstract: A lining system for a fluid containment vessel having an outer section with a floor surface and a vertical surface. The inner section is attached to the outer section so that interstitial space exists between the outer section and the inner section and a continuous negative pressure exists in the interstitial space. The floor surface is formed from a cost saving template. The vessel is divided into at least two independently sealed portions. The inner section includes a shell skirt that reaches a critical height within the vessel to reduce the effects of corrosion and to avoid stresses on the vertical surface. A flushing mechanism allows the area to be purged of any leaked material.

Abstract: A tank has a pair of elongated, generally parallel, and hollow plastic chambers having longitudinally extending side walls and closed ends, and a transverse plastic connector tube having one end connected to and opening into one of the elongated chambers and an opposite end connected to and opening into the other of the elongated chambers.

Abstract: A subterranean tank assembly is provided which broadly includes a vessel, a cover, and a riser which is configured to permit the riser to be adjusted in axial length at the job site. The riser is configured to permit coupling of the cover to the topmost connector portion thereof and to a portal of the vessel. The riser includes a plurality of substantially parallel, axially spaced circumferentially extending flanges which mate with the rim of the portal surrounding the opening, whereby the flanges may be fastened to the vessel in lengths intermediate to the initial length of the riser without the necessity of altering the tank or the cover.

Abstract: A large-volume container for holding liquid media is composed of two shell-like end parts each having a ring-shaped flat contact surface, and at least one sleeve-like middle part composed of two ring segments and provided with two ring-shaped flat contact surfaces and an opening for filling and emptying. The two end parts as well as the ring segments of the middle part are manufactured by blow molding with an inner layer and an outer layer, are provided with external stiffening ribs formed as chambers, and are connected in the areas of their contact surfaces by an inner and outer weld. The two end parts as well as the ring segments have in the areas of their contact surfaces a circumferential chamber, wherein the contact surfaces have at their circumferential boundary edges backwardly extending inclinations for forming welding grooves between the end parts and/or the ring segments.

Abstract: According to the present invention there is provided a storage tank assembly comprising: (i) a storage tank; (ii) support means comprising at least one load bearing reinforcement means extending around and attached to at least a portion of the outer circumference of the storage tank, the support means further incorporating at least one mounting leg to enable the support means to be connected to a canopy.

Abstract: A storage tank includes a dome placed over an open end of a riser and secured to the riser by a fiberglass ring formed over a flanged end of the dome and a portion of the riser that is adjacent to the dome such that the interior of the tank may be pressurized to facilitate leak detection. A fillet of putty or other material that will not adhere or only weakly adhere to the riser and dome is placed over a horizontal surface of the flanged end. This arrangement allows the dome to be removed from the riser by simply grinding away a corner portion of the fiberglass ring at the bottom edge of the dome. The dome may then be reused for other tanks. In another embodiment, a domed cover is formed on an interior of the riser. The domed cover preferably includes a flat outside edge which is permanently attached to the inside wall of the riser. After the tank has been installed and tested, the domed portion is cut away, leaving the flat edge attached to the interior wall of the riser.

Abstract: The invention concerns a tank for a fluid product, having a bottom (4) and a resistant side wall (10) composed of juxtaposed prefabricated panels (1) each comprising a wall element (2) covered, on an internal face (22), with a continuous sealing sheet (3) extended by three sections (33, 33?, 34) which cover respectively the lateral sides (23, 23?) and the lower side (24) of the wall element (2) and overlap on the outside of the wall (10). Said panels are placed on a slab (4) covered with a sealing sheet (42) and the adjacent overlapping sections of the sealing sheets (3, 42) covering the set of the panels (1) and the bottom (4) are connected together in a sealed fashion. Such a tank which is easy to build and to maintain, can contain drinking water or a polluting product.

Abstract: A storage tank leak detection and prevention system that detects a breach or leak in the interstitial space of a double-walled fuel storage tank in a service station environment. The interstitial space is placed under a vacuum using a submersible turbine pump that is also used to pump fuel to the fuel dispensers in the service station and therefore a separate vacuum generating source is not required. A sensing unit and/or tank monitor monitors the vacuum level in the interstitial space over time. If a significant vacuum level change occurs in the interstitial space after the interstitial space is placed under a vacuum level, a catastrophic leak detection alarm is generated. If a minor vacuum level change occurs in the interstitial space after the interstitial space is placed under a vacuum, a precision leak detection alarm is generated. Functional tests also ensure that the leak detection system is functioning properly.

Abstract: A below grade utilities connections vault is disclosed. The vault of the present invention comprises a concrete box with lockable, hinged lid. A floor platform lies at a distance above the bottom of the box such that utilities cables enter the box below the level of the floor. A hinged utilities wiring frame is mounted to the wall opposite the lid hinge such that the frame hinges down into the box when the vault is closed and into a vertical position for making connections. A safety barrier is formed by the lid, the wiring frame, and barrier arms which hinge between them surrounds the vault, when open. A venting system provides egress for gasses and equalization of pressure between the interior and exterior of the vault.

Abstract: A large-volume container for holding liquid media is composed of two shell-like end parts each having a ring-shaped flat contact surface, and at least one sleeve-like middle part composed of two ring segments and provided with two ring-shaped flat contact surfaces and an opening for filling and emptying. The two end parts as well as the ring segments of the middle part are manufactured by blow molding with an inner layer and an outer layer, are provided with external stiffening ribs formed as chambers, and are connected in the areas of their contact surfaces by an inner and outer weld. The two end parts as well as the ring segments have in the areas of their contact surfaces a circumferential chamber, wherein the contact surfaces have at their circumferential boundary edges backwardly extending inclinations for forming welding grooves between the end parts and/or the ring segments.

Abstract: A triple-walled underground storage tank is provided with primary, secondary and tertiary walls. Between each two adjacent walls, an annular space is provided. The annular space is continuous throughout, and permits the flow of liquid therein. Monitors may be provided separately for each annulus, to detect the formation of leaks, or a lack of containment, in either wall defining the annular space. In one embodiment, the tertiary wall is a smooth cylinder formed about the circumferential ribs of the secondary wall. In the alternative embodiment, the rib-bearing wall is the tertiary wall, and the walls and annular materials of the tank are formed within a female mold. In either case, a tank prepared from integral ribs, with superior robustness and strength, is provided with triple containment.

Abstract: A septic system tank vertical wall has vertically overlapping grooved rings having specific diameters for receiving existing sealing couplers for septic system pipe. One wall of the groove has portions at different angles from the wall. The grooves are at the same depth and discontinuous at their intersections.

Abstract: An underground storage tank includes an outer wall having integrally formed ribs, the ribs being closed off by a layer of material applied directly over the space defined created by the ribs and attached to the outer wall, a layer of plastic film or other annular material through which liquid may flow placed over portions of the outer wall between the ribs and extending past the shoulders of the ribs but not extending completely over the material covering the opening of the rib, and an inner wall formed over the annular material and attached to the portion of the material covering the opening provided by the rib that is not covered by the annular material. In this way, the inner wall is tied and preferably chemically and mechanically bonded to the outer wall through the material covering the opening of the rib.

Abstract: A subterranean tank assembly is provided which broadly includes a vessel, a cover, and a riser which is configured to permit the riser to be adjusted in axial length at the job site. The riser is configured to permit coupling of the cover to the topmost connector portion thereof and to a portal of the vessel. The riser includes a plurality of substantially parallel, axially spaced circumferentially extending flanges which mate with the rim of the portal surrounding the opening, whereby the flanges may be fastened to the vessel in lengths intermediate to the initial length of the riser without the necessity of altering the tank or the cover.

Abstract: A double walled storage tank includes an outer wall, an inner wall, a plurality of ribs disposed between the inner and outer walls, and a plurality of annular spaces between the ribs. The annular space between each pair of ribs is connected to other annular spaces only at the top of the tank. When a leak occurs in either the outer or inner wall, the annular space corresponding to the leak will at least partially drain while the other annular spaces will remain full. Thus, the leak location can be determined by simply examining the annular spaces between pairs of ribs.

Abstract: A liquid container for the above-ground storage of flammable fuels is shown having an inner tank with a bottom surface, side surfaces, and a top surface placed within an outer shell having a bottom surface, side surfaces, and an open top. The bottom surfaces of the inner tank and outer shell are spaced apart from each other by first bottom spacers which connect the two bottom surfaces. The side walls of the inner tank and outer shell are also spaced apart from each other by second side spacers which connect the tank and shell. The side spacers for connecting the tank and shell prevent the inner tank from floating within the outer shell when an insulating material, such as concrete, is added therebetween.

Abstract: A triple-walled underground storage tank is provided with primary, secondary and tertiary walls. Between each two adjacent walls, an annular space is provided. The annular space is continuous throughout, and permits the flow of liquid therein. Monitors may be provided separately for each annulus, to detect the formation of leaks, or a lack of containment, in either wall defining the annular space. In one embodiment, the tertiary wall is a smooth cylinder formed about the circumferential ribs of the secondary wall. In the alternative embodiment, the rib-bearing wall is the tertiary wall, and the walls and annular materials of the tank are formed within a female mold. In either case, a tank prepared from integral ribs, with superior robustness and strength, is provided with triple containment.

Abstract: A triple-walled underground storage tank is provided with primary, secondary and tertiary walls. Between each two adjacent walls, an annular space is provided. The annular space is continuous throughout, and permits the flow of liquid therein. Monitors may provided separately for each annulus, to detect the formation of leaks, or a lack of containment, in either wall defining the annular space. In one embodiment, the tertiary wall is a smooth cylinder formed about the circumferential ribs of the secondary wall. In the alternative embodiment, the rib-bearing wall is the tertiary wall, and the walls and annular materials of the tank are formed within a female mold. In either case, a tank prepared from integral ribs, with superior robustness and strength, is provided with triple containment.

Abstract: A wide area water collection type underground water tank compresses: a water tank (11) constituted to be capable of reserving water therein, the water tank (11) being buried underground and having draining structure (14) capable of drawing out the water within the water tank (11) from the aboveground position; an intake pipe (21) having one end communicated with the interior of the water tank (11) from the side portion or upper portion of the water tank (11), and the other end opened into the underground around the water tank (11); a check valve (31) mounted to the intake pipe (21). A water impermeable sheet (19) is buried underground and upwardly and outwardly inclined from the side or bottom of the water tank.

Abstract: An improved double wall tank has two or more threaded fittings, with a steel outer tank and a thermoplastic inner tank. The inner tank is formed within the outer tank by rotational molding. The inner tank is bonded to the outer tank in an area of the fittings, but is otherwise separate and apart from the outer tank. Before carrying out the rotational molding process, bonding material is applied to the outer tank in the area of the fittings. The thermoplastic material is in powder form and includes mold release material. The thermoplastic material is inserted into the outer tank before rotational molding. The degree of shrinkage of the inner tank can be controlled by air pressure including an area between the fittings.

Abstract: A liquid storage tank for holding chemicals and heating oil and water and liquids compatible with high-density polyethylene that is lap welded with a perforation in the lap weld and contains a polyethylene lining inside the tank.

Abstract: The present invention provides visual inspection and physical access into the space of a fluid containment system consisting of an inner storage container or vessel, and an outer, reinforced precast structure, or vault, having a top cover. Visual inspection ports and physical access assemblies, with easily removable covers, are cast into the vault top corners for direct, or remote viewing, such as with a periscope or video camera device, of the exterior surfaces of the inner storage container; the interior surfaces of the outer, vaulted structure; and the space between the two structures. Sufficient physical access and physical maneuverability is provided by the visual inspection port assemblies, and corresponding visual inspection chambers directly below each port assembly, that proactive inspection to verify primary vessel integrity and removal of fluids from the interior space between the two containers can be achieved without personnel entry or removal of the vault top.

Abstract: A sump containment apparatus for a fuel storage tank has a manhole skirt communicating with a sump interior, a bladder seal with a first portion secured in sealing engagement about an opening in the sump, and a second portion disposed about an inner surface of the manhole skirt and urged into sealing engagement with the inner surface by mechanical compression, preferably by an expansion ring. An observation port in a manhole cove is openable for viewing into the sump.

Abstract: A hybrid fiberglass/steel underground storage tank that combines the advantages of a fiberglass tank with those of a steel tank and can be used with various monitoring systems. The tank includes an interior portion made of steel and an exterior portion made of fiberglass. The exterior portion has at least one resin and glass layer, preferably formed of chopped glass mat and 100% solids epoxy resin, coupled to a spacer formed of a three-dimensional woven glass fabric, such as Parabeam®. The interior steel portion and the exterior fiberglass portion are integrally formed to create a single structure. A method of making a hybrid tank is also described.

Abstract: A modular fluid storage tank, intended for underground storage of water, utilizing alternating circular and octagonal ribs in the main body and curved, ribbed, end caps. Interconnection of the tanks uses rigid pipe or semi-flexible hose. The coupling between the pipe and the tank incorporates a fitting, integrally molded into the tank, which extends into the interior of the tank, and a flexible sleeve which fits over, and is clamped to, the fitting and the pipe. The coupling is protected from the environment and is accessible from within the tank after installation for inspection and repair without the need to excavate the tank. The tank preferably has approximately equal length and diameter for improved strength. It is relatively small and lightweight, suitable for transport to and installation at a remote location without heavy equipment.

Abstract: A field applied lining system for the inside surface of fluid containment vessels is described. The lining system includes a lining joined to the inner walls of a fluid containment vessel, defining an interstitial space between the inner wall of the storage tank and the lining. The lining consisting of a plurality of panels of pre-manufactured Fiber Reinforced Plastic joined to each other. A support structure is placed in the interstitial space, the support structure defining avenues for fluid flow through the interstitial space. One or more conduits are provided between the interstitial space and one or more sampling ports placed at the perimeter of the one or more sampling ports placed at the perimeter of the storage tank, permitting access to the interstitial space and the avenues for fluid flow through the interstitial space.

Abstract: The present invention relates to a method of upgrading a tank or a method which involves the assembly of an inner tank within an existing outer tank. In the method of the present invention, rolled panel sections are inserted through a hole of an existing outer tank. The rolled panel sections are adjacently positioned within the existing outer tank and expanded so as to conform to the shape of the existing outer tank. End cap sections either flat or domed depending on the shape of the outer tank are also installed through the hole. All of the seams (axial and transverse) are sealed so as to provide for an inner tank within the outer tank that can rate as a stand-alone tank. Circumferential ribs are installed and attached along a length of the inner tank so as to provide for a structural rigidity of the inner tank.

Abstract: A boltless two-piece rail fastening assembly for securing a railway rail, supported on a conventional tie plate, to a wooden cross tie is comprised of a chair and a rail clip latched thereon. The chair includes a body, having a jaw with a bight configured to receive the clip, and at least one downwardly projecting leg or shank for securing the chair adjacent the base flange of the rail. The rail clip is a torsional spring clip in the general form of an "S" having a rail-bearing leg for proximate engagement with the base flange of the rail and a tie bearing leg for proximate engagement with the tie plate.