What steps are involved in an emergency shutdown of AFFF transfer operations?

• A. Stop pumps, close discharge valves, isolate power, apply emergency stop if applicable, contain spills, notify supervisor, and begin cleanup.
• B. Speed up the pumps to finish quickly.
• C. Leave the area and wait for instructions.
• D. Transfer to a second line to bypass the problem.

Answer: (A)

Emergency shutdown of AFFF transfer operations focuses on quickly stopping the transfer, containing hazards, and notifying the right people. Start by stopping the pumps to immediately halt foam flow. Then close the discharge valves to isolate the transfer path and prevent further discharge. Next, isolate power to remove electrical hazards, and apply lockout/tagout if the situation requires it. If an emergency stop device is available, activate it to ensure an immediate halt of all equipment. Contain any spills with absorbents and barriers to prevent spread to drains or waterways. Notify the supervisor so the incident response can be activated and proper documentation can begin. Finally, once the area is secured, begin cleanup and decontamination according to SOPs. The other options would worsen the incident: speeding up pumps increases risk, leaving the area delays safety actions, and transferring to a second line bypasses safeguards and can spread the problem.