What must embalmers do if TWA sampling exceeds the STEL or the PEL?

When TWA (Time-Weighted Average) sampling indicates that exposure levels exceed the STEL (Short-Term Exposure Limit) or the PEL (Permissible Exposure Limit), embalmers are required to take immediate action to ensure the safety of all personnel in the prep room. Shutting down the prep room is a necessary step to protect workers from harmful exposure to potentially hazardous substances. This action minimizes further risk and allows for an assessment of the situation, as well as the implementation of corrective measures to reduce exposure levels.

Furthermore, while notifying the family, changing personal protective equipment, or conducting an evacuation may be important in various circumstances, they do not address the immediate requirement to ensure a safe working environment when exposure limits have been exceeded. Shutting down the prep room prevents ongoing exposure and is a crucial first step before any further action can be taken.