Now that I'm working from home and have my scanner by my side all day, I've taken on a bit of a project. The RR database shows only one low band freq in use by the County of Sonoma, for animal control dispatch. I have noticed that vehicles used by park rangers, the water agency, and county DOT all have low band antennas. County facility operations staff also have radios they use. A license search shows 16 low band freq's licensed to the county that are not identified in the database. I've put those freq's into a folder on my HP-1. Sometime this week I hope to run the scanner all day and record whatever I can pick up and hopefully identify. So far I've heard traffic on 47.9400 that sounds like road construction flaggers. I'll post updates of my search here.