For moderate risk replacement, which of the following practices must be followed?

The practice of conducting piece by piece replacement is essential for moderate risk replacement because it allows for careful management of lead exposure while maintaining the structural integrity of the building. This method minimizes the amount of dust and debris generated during the replacement process, thereby reducing the risk of lead contamination in the surrounding environment.

By focusing on replacing only the specific components that are necessary, this approach helps to protect both the workers and the occupants from potential lead exposure. This careful, segmented replacement strategy also aligns with regulations and best practices aimed at ensuring safety when handling lead-based materials, particularly in older homes where lead-based paint and materials may be present.

In contrast, demolishing the entire area would create significant exposure risks and is not an appropriate practice for moderate risk situations. Removing all interior fixtures would likely cause unnecessary disruption and hazards. Simply replacing materials without considering the specific needs of the job could lead to inadequate protection against lead exposure. Thus, the piece by piece replacement method is the most suitable and effective strategy for managing moderate risk situations related to lead.