At an under river rail operation, which assignment does not require SOC units and/or SOC Support Ladder Companies?

In the context of an under river rail operation, the assignment of traffic control does not necessitate the involvement of Special Operations Command (SOC) units or SOC Support Ladder Companies. Traffic control typically involves managing and directing vehicular and pedestrian movement around the incident site to ensure safety and facilitate the operation's progress. This task can be effectively carried out by regular fire personnel or other first responders without the need for specialized training or equipment associated with SOC units.

In contrast, the other assignments—atmospheric monitoring, structural assessment, and shoring—require specific expertise and equipment that SOC units are specifically trained and equipped to handle. Atmospheric monitoring is critical for assessing the air quality and potential hazardous gas presence in confined spaces. Structural assessment is essential to evaluate the integrity of structures involved in the incident, and shoring is necessary to provide stabilization to any compromised structures to prevent collapses. These tasks inherently involve a level of risk and specialized knowledge that SOC personnel are specifically trained to manage effectively.