When can cleanup work at a trauma scene begin?

Cleanup work at a trauma scene can only commence once police actions are finalized, and the site has been formally released. This is crucial because the primary responsibility of law enforcement is to secure the scene for evidence collection and investigation. Until they deem the area safe and accessible, any cleanup efforts could potentially compromise vital evidence or interfere with ongoing investigations. Thus, the clearance from law enforcement signifies that the scene is no longer considered a crime scene and is ready for cleanup operations to begin.

The other options do not provide the proper conditions required for initiating cleanup work. Mood assessments or customer approvals do not take precedence over legal and investigative protocols, and hazard warnings typically relate to safety concerns that do not supersede the requirement for police clearance.