In a two-person sample collection R&S element, which role is the one primarily responsible for collecting the sample?

• A. Observer
• B. Supervisor
• C. Sampler
• D. Technician

Answer: (C)

The main idea is that one team member is designated to perform the actual act of taking the sample, while the other provides safety, verification, and documentation. In a two-person sampling setup, the Sampler is the person who carries out the collection—following the prescribed procedure, choosing the correct location or depth, using the appropriate collection device, and immediately sealing and labeling the container to preserve sample integrity and establish chain-of-custody. The Observer supports safety and procedure verification, records what happens, and helps ensure the process is unbiased and contamination-free. While Supervisors and Technicians have important oversight and equipment roles, the act of collecting the sample is the responsibility of the Sampler.