What must be visible on an underground container if the original nameplate is obscured?

In the context of NFPA 58, if the original nameplate of an underground container is obscured, it is essential for safety and regulatory compliance that a duplicate nameplate is installed in a manner that is clearly visible and accessible. This requirement ensures that critical information regarding the container is readily available for inspection and emergency response, facilitating proper identification of the tank’s contents, pressure ratings, and other important operational data.

Having a duplicate nameplate that is clearly visible allows personnel, including first responders, to quickly assess the situation in the event of a leak or other emergency involving the underground container. Accessibility is also critical; the nameplate must be placed in a location where it can be easily inspected without the need for specialized tools or lengthy procedures, further enhancing safety and risk management.

The other options do not meet the necessary criteria for visibility and accessibility, thereby failing to adequately ensure the safety of the installation and those who may be working around it.