Sarah is a safety manager in a chemical manufacturing facility. She's responsible for ensuring the safe handling of hazardous substances in the workplace. During her routine inspection, she encounters various situations related to hazardous substances.

Questions:

6a. While inspecting the chemical storage area, Sarah noticed several containers with different coloured labels. What do these coloured labels typically represent in hazard communication, and why are they important?

6b. Sarah encounters a barrel labelled "Corrosive." What general characteristics of hazardous substances does this label imply, and how should employees handle such substances?

6c. Sarah finds a container without a label in the storage area. What actions should she take, and why is it essential to address this issue promptly?

d. During her inspection, Sarah observed some employees not wearing the required PPE when working with hazardous substances. What steps should she take to ensure compliance with safety regulations, and why is this important?