Which of the following statements about confined space entry training is true?

The statement regarding retraining workers when confined-space hazards change is true because it emphasizes the importance of adapting safety protocols to new conditions. Confined spaces can present a variety of hazards, which might not always be present or could evolve over time, such as changes in air quality, the presence of toxic materials, or shifting structural integrity. If there's a change in any of these factors, it's crucial for workers to be made aware of the new risks and to receive appropriate training to ensure their safety during entry. This approach aligns with the overarching goal of effective safety practices in hazardous environments—preventing accidents and ensuring that all workers are equipped to handle the specific hazards they may encounter.

In contrast, suggesting that entry supervisors are the only ones who need training fails to recognize that all personnel involved, including workers and attendants, require training tailored to their specific roles. The notion of training workers only within a month after an entry is insufficient, as ongoing training should coincide with changes in hazards to maintain safety. Lastly, stating that attendants are responsible for training workers immediately before entry mischaracterizes the role of the attendant, who is typically responsible for monitoring and maintaining communication but not for delivering training at that moment.