What is the minimum clearance from an underground tank to the nearest wall of a basement, pit, or property line?

The minimum clearance from an underground tank to the nearest wall of a basement, pit, or property line is specified in the mechanical code to ensure safety and facilitate maintenance or emergency access. A clearance of 1 foot is established as sufficient distance to minimize risks associated with tank failure or leakage and to ensure compliance with ventilation requirements. This distance allows for the necessary access to the tank for inspections and maintenance while maintaining a safe separation from nearby structures.

Understanding this clearance is crucial for ensuring that underground installations do not pose hazards to structural integrity, human safety, or environmental conditions. In practice, increasing the distance further, as suggested by the other options, is not mandated since 1 foot is deemed adequate for these considerations.