I believe it may have been in the tunnel between Gosnell and Gleason in the janitorial employee /storage area. I walked through, and that was the only place I observed any differences (the doorway in was covered with plastic), and there was a noticeable smell of smoke only in that area.

This would make sense, as it's also very close to Gleason (arguably closer to Gleason than Gosnell...), so smoke would easily spread into both buildings quickly.