Which of the following should be immediately reported in a laboratory?

Reporting unexplained smells in a laboratory setting is crucial for maintaining safety. Unexplained odors may indicate the presence of hazardous substances, chemical spills, or reactions that could lead to unsafe conditions. Some chemicals can generate harmful gases or fumes that can pose health risks to individuals in the lab, and immediate reporting allows for timely investigation and mitigation of potential hazards.

In laboratories, safety protocols often require that any unusual occurrences, especially those that might indicate a chemical hazard, be reported without delay. This proactive approach helps ensure a safe working environment and allows for swift action to protect personnel and property.

In contrast, while increased workload, new procedures, and updated safety equipment may be important matters for overall lab operations, they do not typically require immediate reporting in the same urgent context as unexplained smells.