I've picked up this frequency often and it sounds like some kind of construction crews or something but I'm not sure. So if anyone knows what it is please tell me.
Could this be what you are looking for? It is an expired license but it is not uncommon
for some entities to still be operating on an expired license.
PS - google is your friend
Wilmington Country Club Rt 52, Call Sign: WXF414, Licensee ID: L00017100
Assigned Frequencies : 461.600 MHz
Grant Date: 03/17/2000, Expiration Date: 04/26/2005, Cancelation Date: 07/02/2005
Registrant: Guardian Construction Co, 1280 Porter Rd, Bear, DE 19701
http://wireless2.fcc.gov/UlsApp/UlsSearch/license.jsp?licKey=1764143