Which of the following actions should be taken if an exit portal contamination monitor alarms?

When an exit portal contamination monitor alarms, the appropriate action is to stay in the area and notify the appropriate personnel. This response is crucial because it ensures that trained experts can assess the situation and take necessary actions to mitigate any potential hazards. Staying in the area allows for a quick response from personnel who are equipped to handle contamination situations, maintaining safety for everyone involved.

Taking the action of leaving the area might lead to spreading contamination or could interfere with emergency procedures. Ignoring the alarm can pose significant risks; even if you believe you are not carrying any contaminated items, it’s essential to treat all alarms seriously until confirmed safe. Similarly, proceeding to a bathroom does not address the immediate concern of contamination, potentially allowing hazards to remain unchecked. Therefore, remaining in the area and notifying personnel is the correct response, as it prioritizes safety and ensures proper protocols are followed.