Abstract: Split fittings for use in the installation of a semi-rigid secondary pipe over a primary pipe comprise a pair of housing halves which, when mated, form a housing enclosure, sealing means and clamping means capable of holding the secondary pipe and housing halves as a sealed enclosure. A method of fitting a rigid pipeline system with secondary containment system with a secondary semi-rigid pipe uses the split fittings.

Abstract: A method of making a storage tank system comprises forming an inner containment wall comprised of a series of wall sections onto the interior walls of a cylindrical-shaped ribbed storage tank. Each wall section is bonded to the tank's side walls at a distance of less than about four inches in height from the tank wall. Primary containment is provided by a tank formed of the wall sections and inner end caps. A monitored storage tank system with secondary containment is provided by the use of a leak detection means to monitor the space defined by the inner containment wall and the storage tank.

Abstract: A center-point compression sealing lid member for use on containers of all sorts is described. The lid member is completely removable from the container. The lid member comprises a cover with a spacer positioned in its approximate center, a force transfer bar permanently positioned over the spacer and extending across the cover with means on one extremity to engage a retaining means on the container, and a lever bar pivotably mounted on the force transfer bar's second extremity to engage a second retaining means on the container. When the lid member is properly positioned over the container's opening with the means on the first extremity of the force transfer bar and the lever bar aligned with the retaining means found on the container and downward force exerted on the lever bar, the force is transmitted through the spacer to the cover. Substantially equal force is exerted by the cover's peripheral edges onto edges of the container's top opening to form a liquid-tight seal.

Abstract: A method of making a jacketed storage tank comprises applying a layer of wax over a rigid inner storage tank, applying fibrous reinforcing material and resinous material onto the wax, and then curing. The wax is subsequently melted and removed to create a continuous space. The resultant jacket is structurally independent from the storage tank, yet is in such close proximity thereto that the resultant jacketed storage tank has an integral structural strength capable of withstanding external load forces normally encountered by underground storage tanks. Secondary containment is provided by the jacket.

Abstract: A storage tank system especially useful for storing liquid gasoline comprises a rigid inner tank, access lines extending through the tank, a sleeve attached to the rigid inner tank and encompassing the access lines, and a jacket encasing the tank and at least part of the sleeve. A leak detector is associated with the closed space between the inner tank and jacket to detect leaks. The system results in a storage facility which is not likely to lose its stored liquid to the environment due to slow leak or a sudden large leak by providing total containment capability.

Abstract: An assembly for controlling overfill of liquid to an underground storage tank during a filling operation comprises a dump tank, a fill tube positioned within the dump tank, piping with valve and a cover. The fill tube within the dump tank is encased with a shrink-fitting covering which extends from the bottom portion of the dump tank to ensure a liquid tight overfill assembly.

Abstract: A method of making a storage tank comprises forming a cylindrical-shaped inner tank with support ribs and forming an outer wall comprised of a series of sections which are at least partially separated from the inner tank's walls between each set of support ribs. Each outer wall section is bonded to the side walls at a distance of less than about 90% of the height of the support ribs such that the ribs protrude from the outer surface of the storage tank system. The inner and outer walls of the system are both strengthened by the common support ribs. Secondary containment is provided by the outer wall. A monitored storage tank system is provided by the use of the leak detection means to monitor the closed space defined by the rib interiors, the outer wall and the storage tank.

Abstract: A method of making a jacketed storage tank comprises applying an open-cell synthetic foam over a rigid inner storage tank, applying a layer of fibrous reinforcing material on the separating agent, and applying a resinous material. The synthetic foam is at least partly sealed to prevent excessive resinous material penetration so as to maintain the continuous open-cell nature of the foam. The resultant jacket is structurally independent from the storage tank, yet is in such close proximity thereto that the resultant jacketed storage tank has an integral structural strength capable of withstanding external load forces normally encountered by underground storage tanks. Secondary containment with leak detection capability is provided.

Abstract: Split fittings for use in the installation of a semi-rigid secondary pipe over a primary pipe comprise a pair of housing halves which, when mated, form a housing enclosure, sealing means and clamping means capable of holding the secondary pipe and housing halves as a sealed enclosure. A method of fitting a rigid pipeline system with secondary containment system with a secondary semi-rigid pipe uses the split fittings.

Abstract: A method of making a storage tank system comprises forming an outer containment wall comprised of a series of outer wall sections over a cylindrical-shaped inner storage tank. Each outer wall section is bonded to the inner tank's side wall at a distance of less than about four inches in height from the inner tank wall. The inner and outer walls of the system are both strengthened by wall caps which overlap the outer wall sections. Secondary containment is provided by the outer wall sections, wall caps and outer end caps. A monitored storage tank system with secondary containment is provided by the use of a leak detection means to monitor the closed space defined by the outer containment wall and the inner storage tank.

Abstract: A method of making a jacketed storage tank comprises applying a layer of wax over a rigid inner storage tank, applying fibrous reinforcing material and resinous material onto the wax, and then curing. The wax is subsequently melted and removed to create a continuous space. The resultant jacket is structurally independent from the storage tank, yet is in such close proximity thereto that the resultant jacketed storage tank has an integral structural strength capable of withstanding external load forces normally encountered by underground storage tanks. Secondary containment is provided by the jacket.

Abstract: A storage tank having primary and secondary containment means is made from a rigid outer tank shell by forming an inner tank shell of fibrous reinforcing material and resinous material. A gas pervious material is initially positioned on the inside surface of the rigid tank. Leak detection means is used to monitor the closed space between the rigid outer tank and formed inner tank.

Abstract: A cylindrical-shaped rigid inner storage tank with substantially flattened ends is jacketed in a manner which results in storage tank system capable of holding detecting liquid or being placed under non-atmospheric pressure without structural damage. The rigid inner tank initially has end plates mounted on its flattened ends. Thereafter, a separating agent is applied over the side walls of the storage tank, a layer of fibrous reinforcing material applied on the separating agent and the end plates, and a resinous material applied. The resultant jacket is independent from the side walls of the inner tank. True secondary containment is provided by the jacket. A fail safe containment storage tank system is provided by the use of a leak detection means to monitor the closed space between the storage tank and jacket for tank or jacket leakage.

Abstract: An overfill assembly for use with storage tanks, especially underground gasoline storage tanks. The overfill assembly comprises a dump tank with a fill pipe mounted therein. The fill pipe extends through the dump tank's bottom and is in communication with the storage tank. A removable center-point compression sealing lid member for the dump tank allows for ready access to the fill pipe. A valve mechanism in the dump tank allows for controlled emptying of spilled liquid in the dump tank to the storage tank.

Abstract: A method of making a storage tank comprises applying ribs around a inner tank, securing said ribs to the inner tank, applying gas pervious material in the space between the ribs, and applying a layer of fibrous reinforcing material and resinous material over the gas pervious material. The gas pervious material extends to a distance less than about 75% of the height of the ribs. The resultant overlay encases the surface areas between the ribs of the storage tank, and becomes a structural part thereof. Secondary containment is provided by the overlay. A monitored storage tank system is provided by the use of a leak detection means to monitor the closed space defined by the rib interiors the overlay and the storage tank.

Abstract: A storage tank system especially useful for storing liquid gasoline comprises a rigid inner tank encased by a flexible outer jacket to form a closed space, detecting liquid in the closed space and non-visual leak detection means associated with the closed space. The system results in a storage facility which is less likely to lose its stored liquid to the environment due to a slow leak or a sudden large leak such as is possible with an earthquake. The system is monitored for leakage in a reliable yet economical fashion.

Abstract: A storage tank system especially useful for storing liquid gasoline in one aspect comprises a rigid inner tank encased by a flexible outer jacket with a leak detecting means associated with the closed space between the inner tank and jacket. In another aspect, an outer rigid tank contains a bladder within it together with leak detecting means between the tank and bladder. The system results in a storage facility which is less likely to lose its stored liquid to the environment due to a slow leak or a sudden large leak such as is possible with an earthquake.

Abstract: A storage tank system especially useful for storing liquid gasoline comprises a rigid inner tank having a manhead, a dispensing line extending through the manhead, a sleeve encompassing the manhead, and a jacket encasing the tank and at least part of the sleeve. A leak detector is associated with the closed space between the inner tank and jacket to detect leaks. The system results in a storage facility which is less likely to lose its stored liquid to the environment due to a slow leak or sudden large leak such as is possible with an earthquake and provides total containment capability.

Abstract: Split fittings for use in the installation of a flexible jacket over a rigid pipeline comprise a pair of housing halves which, when mated, form a housing enclosure, sealing means and clamping means capable of holding the flexible jacket to the housing enclosure. A method of retrofitting a rigid pipeline system with a flexible jacket uses the split fittings.

Abstract: A method of making a jacketed storage tank comprises applying a separating agent over the storage tank, applying a layer of fibrous reinforcing material on the separating agent, and thereafter applying a resinous material. The resultant jacket, covering at least about 40% of the surface area of the storage tank, is structurally independent therefrom. True secondary containment can be provided by the jacket. A fail safe containment storage tank system is provided by the use of a leak detector to monitor the closed space between the storage tank and jacket for tank or jacket leakage.