Abstract: An underground storage tank assembly and method for fabricating the same are disclosed. A steel primary fluid storage tank is provided having an outer, peripheral surface. A secondary fluid storage container being formed of curable plastic material and having a substantially smooth inner surface is tightly secured about the outer, peripheral surface of the primary fluid storage tank. The interstitial spaces formed between the outer surface of the primary container and the inner surface of the secondary container permit the desired migration of fluid therethrough to allow the detection of any fluid leaking through the primary tank or secondary tank. Various methods for forming the secondary fluid storage container are disclosed. The outer surface of the primary tank and/or the inner surface of the secondary fluid storage container may be textured for applications requiring enhanced fluid migration.

Abstract: A secondary containment capsule for enclosing primary storage tanks made of one or more standard axial portions and end caps is disclosed. Each of these segments are separately molded from a curable plastic material such as fiberglass reinforced polyester. Axial segments are separately slid over the primary tank and joined together at their mating ends, forming a longitudinal cylinder covering the longitudinal sides of the primary tank. The molded end caps are then placed over the outer ends of the longitudinal cylinder formed by the axial segments to completely enclose the primary tank. The same end caps and axial segments can be used for enclosing primary tanks having the same diameter but different lengths. In another embodiment, the one or more substantially cylindrical sections of the secondary containment capsule are formed on a male mold and split longitudinally for removal from the mold.

Abstract: An underground storage tank assembly and method for fabricating the same are disclosed. A steel primary fluid storage tank is provided having an outer, peripheral surface. A secondary fluid storage container being formed of curable plastic material and having a substantially smooth inner surface is tightly secured about the outer, peripheral surface of the primary fluid storage tank. The interstitial spaces formed between the outer surface of the primary container and the inner surface of the secondary container permit the desired migration of fluid therethrough to allow the detection of any fluid leaking through the primary tank or secondary tank. Various methods for forming the secondary fluid storage container are disclosed. The outer surface of the primary tank and/or the inner surface of the secondary fluid storage container may be textured for applications requiring enhanced fluid migration.

Abstract: A secondary containment capsule for enclosing primary storage tanks made of one or more standard axial portions and end caps is disclosed. Each of these segments are separately molded from a curable plastic material such as fiberglass reinforced polyester. Axial segments are separately slid over the primary tank and joined together at their mating ends, forming a longitudinal cylinder covering the longitudinal sides of the primary tank. The molded end caps are then placed over the outer ends of the longitudinal cylinder formed by the axial segments to completely enclose the primary tank. The same end caps and axial segments can be used for enclosing primary tanks having the same diameter but different lengths. In another embodiment, the one or more substantially cylindrical sections of the secondary containment capsule are formed on a male mold and split longitudinally for removal from the mold.