For a Hazmat Investigation involving an unknown substance, which staffing combination is used?

• A. Hazmat, 1 Medic, 2 Engines or Aerials, 1 Battalion, PIO, Bureau
• B. Hazmat, 2 Medics, 3 Engines, 1 Battalion, PIO, Bureau
• C. Hazmat, 1 Decon, 1 Engine, 2 Medics, 1 Battalion, Safety, PIO, Bureau
• D. Hazmat, 1 Medic, 1 Engine, 2 Battalions, PIO, Bureau

Answer: (A)

Handling a hazmat investigation with an unknown substance requires a staffing plan that covers hazard assessment and containment, medical readiness, scene control, clear command, and effective communications. The best mix brings together a Hazmat unit to perform the initial assessment and containment planning, a medic ready to monitor and treat potential exposures, two engines or aerials to provide access, water, lighting, and support for decon or entry, a Battalion Chief to command and coordinate safety and operations, plus a Public Information Officer to handle communications and a Bureau liaison to coordinate with the jurisdiction’s agencies.

This combination ensures the scene is properly evaluated for hazards, medical protection is available, adequate resources are on hand to secure the area and support the hazmat team, and information flows are managed with leadership and external coordination. Other staffing mixes either omit the Hazmat resource, over- or under-allocate medical staff, or add roles (like separate decon or safety) in ways that don’t align with the established initial response package for an unknown hazmat investigation.