For safety in refrigerant management, what is required when concentrations exceed TLV-TWA?

When concentrations of refrigerants exceed the TLV-TWA (Threshold Limit Value - Time Weighted Average), it indicates that the exposure limit for workers is surpassed, which can pose a health risk. The correct answer involves taking immediate safety measures to protect individuals in the environment.

Activating alarms and ensuring adequate ventilation is crucial because it addresses the need to alert personnel to the hazardous conditions and mitigate the buildup of harmful refrigerant gases. Alarms serve as a warning system to vacate the area or take corrective actions, while increased ventilation can help reduce the concentration of the refrigerant in the air, making it safer for workers.

This response is aligned with safety protocols that prioritize health and well-being in environments where refrigerants are handled. It focuses on active management of the situation while allowing for a controlled response to the raised levels of exposure, rather than immediately shutting down systems or evacuating without addressing the cause of the problem.