What is the minimum spacing allowed between the tank and excavation walls?

The minimum spacing allowed between underground storage tanks (USTs) and excavation walls is established to ensure safety and accessibility for maintenance, monitoring, and potential emergency response activities. Choosing a spacing of 2 feet facilitates these considerations while also allowing adequate room for soil movement, reduction of pressure against the tank, and access for repair and inspection activities.

Space constraints can lead to a greater risk of structural stress on the tank, which may result in leaks or failures over time. Maintaining 2 feet of distance helps to mitigate these risks while still considering the need to maximize space within the excavation site. This requirement reflects industry standards and practices aimed at protecting both the UST infrastructure and the surrounding environment from potential contamination or hazards.

The spacing requirement aligns with regulatory guidelines ensuring that UST installations are carried out safely and responsibly.