Okay....the nice lady that answered the phone up Rose Fire Company actually had said Ops 4, but her function was (I believe) EMS, so maybe fire uses 5 and EMS 4? Either way, the question is answered--the individual volly companies apparently don't get a dedicated TG...
No, there isn't a private talk group for each fire department with the exception of York City - they have a handful for their non-emergency operations. There is, however, a dedicated talk group for each police department (go figure, the director of the 911 center and chairperson of the radio committee is an ex-police chief). There are also 21 tactical talk groups for law enforcment. There are 11 for fire. A bit lopsided? Yeah.
The person you talked to at Rose Fire Company is actually correct. DCR_inc was wrong (as was I). Calls in station 58's area (fire and EMS) originate on OPS4. A general rule for the south end of the county (south of the Route 30 corridor) is that departments located east of I-83 are on OPS5 (east fire/EMS ops) and departments located west of I-83 are on OPS4 (west fire/EMS ops).