In what scenario might an employee be exposed to hazardous gas from a pressure relief valve?

An employee might be exposed to hazardous gas from a pressure relief valve when working from a scaffold outside a building because this scenario involves being in close proximity to industrial or mechanical systems that utilize pressure relief valves. These valves are designed to release pressure from equipment, such as boilers or chemical tanks, to prevent explosions or leaks.

When this pressure is released, it may discharge gases that could be hazardous. Working on a scaffold often occurs in locations where such equipment is operated or maintained, increasing the likelihood of exposure to these gases. Safety protocols dictate that employees in these situations must use personal protective equipment (PPE) and follow safety guidelines to minimize risk.

In contrast, the other scenarios—working in an office building, participating in a training session indoors, and taking inventory at a warehouse—are typically less likely to involve direct exposure to such hazardous gases, as they do not generally occur near equipment that utilizes pressure relief systems. This reinforces the importance of understanding specific workplace environments and the associated risks when it comes to health and safety.