A School Safety Agent is reviewing a colleague's draft incident report about a fire alarm.
The draft contains the following four sentences: (1) Upon arrival, I observed smoke emanating from the boys' restroom on the second floor. (2) The fire department arrived and took control of the scene at 11:10 AM. (3) At approximately 11:00 AM, the fire alarm was activated throughout the building. (4) I immediately proceeded to the second floor to investigate the source.
Which sentence is out of chronological order and disrupts the logical flow of the report?