The space between two tanks of secondary containment is called the interstice.

The space between two tanks of secondary containment is called the interstice.

• A. Gasket
• B. Plenum
• C. Interstice
• D. Cavity

Answer: (C)

Interstice is the precise term for a narrow space between closely spaced surfaces, such as the gap between an inner tank and its outer secondary containment. That small separating space is designed to be monitored for leaks and can hold any leaked liquid or drainage for detection, making interstice the correct descriptor for the space between the two tanks. Gasket refers to the sealing material placed at joints to prevent leaks, not the space itself. Plenum is an air-filled chamber used for flow or distribution, not the containment gap. Cavity is a general hollow space, but interstice is the specific technical term used for the space between containment layers.

Interstice is the precise term for a narrow space between closely spaced surfaces, such as the gap between an inner tank and its outer secondary containment. That small separating space is designed to be monitored for leaks and can hold any leaked liquid or drainage for detection, making interstice the correct descriptor for the space between the two tanks.

Gasket refers to the sealing material placed at joints to prevent leaks, not the space itself. Plenum is an air-filled chamber used for flow or distribution, not the containment gap. Cavity is a general hollow space, but interstice is the specific technical term used for the space between containment layers.