Final answer:
The accident scene can be disturbed after authorities have completed their investigations and deemed the scene safe. Disturbance is also dependent on emergency personnel's safety assessments and the removal of hazards like contaminated waste.
Step-by-step explanation:
The accident scene of an incident causing loss of life or a worker seeking medical aid may generally be disturbed only after the proper authorities have conducted their necessary investigations and documentation, and when it is deemed safe to do so by emergency responders or hazardous material teams. Situations that involve contaminated waste and require the establishment of an evacuation zone due to radioactive fallout or similar dangers, as referenced in the accompanying figures, typically involve additional protocols and a careful approach to ensure public safety and the integrity of the investigation.When an accident involves serious potential threats such as explosions or fires, emergency personnel must assess the scene for extreme physical danger before disturbing it. If the scene is unsafe, they must wait until it has been contained or made safe. Only after these steps are taken should personnel begin removing hazardous materials or altering the site in any way.