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

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.

Dependencies are inferred from the claim text.