What is a critical design feature regarding tanks in high groundwater conditions?

In high groundwater conditions, ensuring the non-buoyancy of the tank is critical. When groundwater levels are high, there is an increased risk of tanks floating or being displaced due to hydrostatic pressure. If a tank is buoyant, it can lead to severe issues such as structural damage, improper function, or even complete dislodgement from its installation site. Thus, tanks need to be designed or installed in a manner that prevents buoyancy, which can include using heavier materials, anchoring systems, or ensuring that the tank is installed below the seasonal high water table. This design feature is fundamental to maintaining the integrity and performance of the septic system in challenging groundwater conditions.