JT - With regard to your Squad assignment question:
From the FDNY Operational Reference Eighth Edition - pages 84 and 85
"Unlike other special units which are dispatched to battalion areas, squads are assigned to first-due engine company response areas, shown below"
Squad 18: 1, 3, 4, 5, 6, 7, 8, 9, 10, 14, 15, 16, 18, 21, 23, 24, 26, 28, 33, 34 39, 40, 44, 54, 55, 65, 74, (27 total)
I believe there maybe a map showing all of this - I can't recall off the top of my head.
There is a listing of all the Squads and their associated Engine Companies in the Operational reference