For steel and fiberglass reinforced plastic tanks, what is the minimum bedding depth of backfill material at the bottom of the excavation?

The minimum bedding depth of backfill material at the bottom of the excavation for steel and fiberglass reinforced plastic tanks is established to ensure these tanks are properly supported and protected from settling or shifting. A depth of 1 foot provides an adequate cushion and support that helps to prevent damage to the tank during installation and throughout its operational lifecycle. This bedding depth also facilitates proper drainage and reduces the likelihood of external pressures that could compromise the structural integrity of the tank. Ensuring the correct bedding depth is crucial for safety and compliance with regulatory standards in tank installation practices.