What is an acceptable minimum burial depth of cover for steel underground tanks in traffic areas as specified in NFPA 30?

The National Fire Protection Association (NFPA) 30 specifies that for steel underground storage tanks located in traffic areas, a minimum burial depth of 3 feet of earth cover is required. This requirement serves several purposes, including providing adequate protection against potential impacts from vehicles and minimizing the risk of damage to the tank itself. The 3-foot cover also helps to manage environmental factors, such as soil temperature and moisture, which can be important for the integrity of the tank over time.

In the context of safety and compliance, adhering to this minimum burial depth is crucial to prevent accidents and leaks that could lead to environmental contamination or safety hazards. Ensuring that the cover is sufficient not only protects the tank but also complies with industry standards, thereby contributing to the overall safety of underground storage tank operations.