What should a security guard do first upon encountering a dangerous substance?

Upon encountering a dangerous substance, the priority for a security guard is to ensure the safety of individuals in the vicinity. Evacuating the area and contacting emergency services is crucial because it minimizes exposure to potential hazards and allows trained professionals to handle the situation safely.

By evacuating the area, the guard reduces the risk of harm to themselves and others, preventing possible injury or health issues from the substance. Following this step, contacting emergency services ensures that proper protocols are followed, and experts are dispatched who have the training and equipment necessary to manage hazardous situations effectively.

While alerting other guards and attempting to contain the substance may seem like proactive measures, they come after ensuring that everyone is safely out of harm's way. Similarly, trying to neutralize a dangerous substance can pose substantial risks, especially without the right protective gear or knowledge of how to handle that particular substance. Therefore, prioritizing safety through evacuation and alerting professionals is the correct approach in this scenario.