What is the first step in planning a CBRN sampling mission?

• A. Review site survey information
• B. Gather PPE
• C. Select laboratory
• D. Train team

Answer: (A)

Understanding the actual conditions and context of the environment is the first step because it sets the foundation for every other decision in a CBRN sampling mission. A site survey brings in real-world information about what contaminants or hazards might be present, where they’re located, how access is controlled, and what environmental factors (like wind, terrain, or water flow) could affect sampling. This initial picture defines the scope of the mission—which samples are needed, where they should be collected, and what safety boundaries and procedures must be in place.

With that context, you can design a safe and effective plan. The information from the site survey guides what level of protective equipment is appropriate, what sampling methods are feasible, what analyses are required, and how the logistics will be managed. It also shapes the training that the team will need, ensuring they’re prepared for the specific hazards and steps they'll perform. If you skip this step, you risk misjudging hazards, choosing unsuitable methods, or over- or under-preparing, and you might run into regulatory or access issues later.

So, reviewing site survey information first is the best starting point because it directly informs PPE decisions, laboratory needs, and training—all of which hinge on the actual conditions and constraints of the site.