System and method for repair of breach in exterior secondary containment wall of double wall underground storage tank without excavation

Inventor: Anthony James Rieck (Colorado Springs, CO)

Assignee: Poly Lining Systems, Inc.

B23P6/04 B65D88/76 B65D90/028 B65D2590/0075

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Quick Facts

Patent No.: US 12686085
App. No.: 19/369,617
Granted: Jul 21, 2026
Kind: B1

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Abstract

This invention provides a system and method for the repair of breaches in an exterior secondary containment wall of double wall underground storage tank, including accessing an interstitial space between the exterior secondary containment wall and an inner primary containment wall with a fluid source input assembly. A flowable material is then injected through the fluid source input assembly so that it substantially fills the interstitial space of the tank and solidifies, forming a substantially impermeable barrier to movement of material through the exterior secondary containment wall and an exterior environment. The inner primary containment tank is made of metal or a fibrous resinous material and/or the exterior secondary containment wall is made of metal, a fibrous resinous material, or a polymer material. An injection port is provided, defining a passage through the inner primary wall for the injection of the flowable material into the interstitial space.

Claims (20)

1 . A method for the repair of breaches in an exterior secondary containment wall of a double wall underground storage tank comprising the steps of:

accessing an interstitial space between the exterior secondary containment wall and an inner primary containment wall with a fluid source input assembly; and

injecting a flowable material through the fluid source input assembly that substantially fills the interstitial space of the tank and solidifies to form a substantially impermeable barrier to movement of material through the exterior secondary containment wall and an exterior environment,

wherein the steps of accessing and injecting include providing an injection port that defines a passage through the inner primary containment wall for the injection of the flowable material into the interstitial space.

2 . The method as set forth in claim 1 , wherein the inner primary containment wall is made of metal or a fibrous resinous material.

3 . The method as set forth in claim 2 , wherein the exterior secondary containment wall is made of metal, a fibrous resinous material, or a polymer material.

4 . The method as set forth in claim 3 , wherein the exterior secondary containment wall defines a 360-degree secondary containment wall, and further comprising, applying a relief port adjacent to a top of the exterior secondary containment wall to vent the flowable material so as to substantially fully fill the interstitial space.

5 . The method as set forth in claim 3 , wherein the exterior secondary containment wall defines a 320-degree secondary containment wall, and further comprising, applying relief ports adjacent to locations at a top of the interstitial space, on the exterior secondary containment wall, to vent the flowable material so as to substantially fully fill the interstitial space.

6 . The method as set forth in claim 1 , wherein the exterior secondary containment wall is made of metal, a fibrous resinous material, or a polymer material.

7 . The method as set forth in claim 1 , wherein the exterior secondary containment wall defines a 360-degree secondary containment wall, and further comprising, applying a relief port adjacent to a top of the exterior secondary containment wall to vent the flowable material so as to substantially fully fill the interstitial space.

8 . The method as set forth in claim 1 , wherein the exterior secondary containment wall defines a 320-degree secondary containment wall, and further comprising, applying relief ports adjacent to locations at a top of the interstitial space, on the exterior secondary containment wall, to vent the flowable material so as to substantially fully fill the interstitial space.

9 . A method for the repair of breaches in an exterior secondary containment wall of a double wall underground storage tank comprising the steps of:

accessing an interstitial space between the exterior secondary containment wall and an inner primary containment wall with a fluid source input assembly;

directing a first component of the flowable material from a first source along a first hose and a second component of the flowable material from a second source along a second hose both into an interior volume of the underground storage tank to a mixer that is coupled to the injection port.

10 . The method as set forth in claim 9 , wherein the steps of accessing and injecting include providing an injection port that defines a passage through the inner primary containment wall for the injection of the flowable material into the interstitial space.

11 . The method as set forth in claim 9 , wherein the step of providing the injection port includes drilling a hole in the inner primary containment wall, and sealably securing a flanged threaded coupling nut into the hole, the flanged threaded coupling being connected to the mixer.

12 . The method as set forth in claim 9 , wherein the step of directing includes providing the first component consisting of acrylamide grout mix and the second component consisting of acrylamide activation mix.

13 . The method as set forth in claim 9 , wherein the exterior secondary containment wall defines a 360-degree secondary containment wall, and further comprising, applying a relief port adjacent to a top of the exterior secondary containment wall to vent the flowable material so as to substantially fully fill the interstitial space.

14 . The method as set forth in claim 9 , wherein the exterior secondary containment wall defines a 320-degree secondary containment wall, and further comprising, applying relief ports adjacent to locations at a top of the interstitial space, on the exterior secondary containment wall, to vent the flowable material so as to substantially fully fill the interstitial space.