How deep should sand and backfill be placed into the excavation during tank installation?

The correct depth for placing sand and backfill during tank installation is 12 to 18 inches. This range ensures that there is enough material to provide proper support and cushion for the tank, reducing the risk of movement or damage. Adequate sand and backfill help distribute the weight of the tank evenly, minimizing the potential for settling or shifting.

Additionally, this depth range allows for effective drainage and prevents water accumulation around the tank, which is crucial for maintaining structural integrity and avoiding corrosion. Ensuring that the sand and backfill are within this specified range is vital for creating a stable environment for the buried tank. Proper installation practices are essential for both safety and performance, making it important to follow these guidelines closely.