Possibly NYS Parks PD. They have been fairly active in the past few days. Listen for the 8Kxx ID's. I know they pop up on DC911 Polling every once in a while to run data.
Also possibly some of the towns/villages that are dispatched by NYSP (Rhinebeck, V/Fishkill, V/Millbrook, etc..) They ocassionally use Polling to run data.
Just some possibilities. It's hard to say for sure without hearing the Unit ID. It really could be any agency.
Hope this helps,
nozzlenut83