Which station is part of both Battalion 3 and a unique number?

Station 91 is part of Battalion 3 and holds a unique designation among the stations. In a fire department context, this usually indicates that the station serves a specific geographic area covered by Battalion 3 while also being identified with its unique number, 91. Such dual identification helps in organizing emergency services, ensuring clarity in communication, and facilitating quick response during incidents in that battalion's jurisdiction. Unique station numbers also aid in logistical planning, resource allocation, and maintaining operational efficiency within the fire department's structure.

Other stations mentioned may not have this combination of being a part of Battalion 3 while possessing a unique operational number, which is why they do not fit the criteria specified in the question.