Containment of a Diesel Tank

Containment of a Diesel Tank

Containment refers to the safety systems put in place to prevent diesel spills or leaks from contaminating the surrounding environment. This is especially important for above-ground (OTG) diesel storage tanks.

There are typically two types of containment systems:

1. Primary Containment

This is the tank itself — made of steel or other materials — that holds the diesel.

2. Secondary Containment

This is the backup system that catches leaks or spills if the primary tank fails. Common types include:

Bund walls or bunded areas: A wall or enclosure (usually concrete or steel) built around the tank to catch spills.

Typically designed to hold 110% to 120% of the tank’s volume.

Double-walled tanks: Tanks with an outer shell to contain any leakage from the inner tank.

Spill containment pallets: For smaller portable tanks.

Why Containment is Important

Environmental protection: Prevents soil and water contamination.

Fire safety: Diesel is flammable — spills increase fire risk.

Regulatory compliance: Required by environmental and fire safety regulations.