What observation might indicate damage to containers holding hazardous materials?

Damage to containers holding hazardous materials can manifest in various physical changes, with container bulging being a significant indicator. When a container bulges, it suggests that there is either an increase in pressure within the container or a reaction occurring inside. This can result from chemical reactions, temperature changes, or a build-up of gases, all of which may compromise the integrity of the container.

The other observations do not indicate damage. Containers remaining in perfect condition, being freshly painted, or having a consistent shape do not exhibit signs of stress or deterioration, which are critical in assessing the safety and stability of hazardous materials. Fresh paint might even be misleading, as it could be used to cover up damage rather than indicate container health. Thus, noticing bulging serves as a clear warning sign that immediate attention is required to prevent potential leaks or spills of hazardous materials.