Final answer:
At the beginning of a restoration or cleanup job, it's crucial to remove charred, unsalvageable materials to prevent the spread of contaminants to clean areas and materials that are either to be restored or remain in use.
Step-by-step explanation:
When starting a job that involves restoration or cleanup work, it is important to remove charred, unsalvageable materials at the beginning of a job to reduce cross-contamination of clean areas and materials that will be restored or remain in use. By doing this at the beginning, you ensure that soot, ash, or other contaminants from the unsalvageable materials do not spread to areas that are not affected. This process aids in maintaining a clean environment and facilitates a more efficient and effective cleanup.