http://www.ci.san-luis-obispo.ca.us/...alappendix.pdf
From June 2009 - good info here - includes radio freqs - they want to add multi VHF channels - and move DPW to UHF - DPW might go to digital since they do not need to interoperate with adjacent agencies
This document gives a thorough technical look at a modern conventional (non trunked) public safety radio system