Which piece of equipment is essential for safely transporting hazardous materials?

The sealed container is essential for safely transporting hazardous materials because it is specifically designed to prevent leaks and contain any potentially harmful substances. These containers are built to withstand various conditions and are often made from materials that resist corrosion and degradation from the chemicals being transported. The primary function of a sealed container is to provide a secure environment that minimizes the risk of exposure to harmful substances for both the transport personnel and the environment.

In contrast, a standard cart does not provide any specific safety features to handle hazardous materials. Similarly, while a ventilated cart may offer airflow, it can inadvertently expose personnel to hazardous fumes or pollutants rather than contain them. A cooler box, although useful for temperature-sensitive items, lacks the crucial sealing necessary to prevent spills or leaks, making it unsuitable for hazardous materials transportation. Thus, the sealed container stands out as the most appropriate choice for safely managing such materials.