Decontamination stations can be arranged in any order.

The arrangement of decontamination stations must follow a specific order to ensure effective and safe decontamination processes. This order typically consists of different zones, such as a "hot zone" where contamination occurs, a "warm zone" for transition and initial decontamination, and a "cold zone" where decontaminated personnel and materials are considered safe.

Having a structured arrangement allows for effective contamination control, minimizes the risk of spreading hazardous substances, and helps ensure that personnel are properly decontaminated before leaving the contaminated area. Improper sequencing could lead to reinfection of cleaned personnel or contamination of safe areas, which could jeopardize health and safety protocols on site.

The other options (that the order can be situational, that it can change during training, or that it could be true) imply flexibility or variability that is not appropriate when it comes to the critical safety measures related to decontamination procedures. The correct answer underscores the necessity of adhering to these established protocols to maintain a safe working environment during hazardous waste operations and emergency response activities.