From what part of an underground container is the required distance to a building measured?

The required distance to a building from an underground container is measured from the container surface. This is important for safety and regulatory compliance, as it takes into account the actual position of the container relative to potential hazards.

Measuring from the container surface ensures that any potential physical impacts or heat effects from the container are appropriately accounted for when determining the safe distance to structures. This approach aligns with safety regulations outlined in NFPA 58, which seek to mitigate risks associated with the installation and operation of liquefied petroleum gas systems.

By focusing on the surface of the container, rather than the top, bottom, or ground level, the measurement remains consistent with how the gas is stored and the engineering tolerances that ensure safety during operation.