wrote in message:
I entered the following frequencies in my scanner but heard
nothing:
Frequency Input License Type Tone CH Description Mode
460.15000 465.15000 KLP745 BMRF 127.3 PL 1 Dispatch FM
460.25000 465.25000 KLP745 BMRF 127.3 PL 2 Secondary FM
460.55000 465.55000 WPKV955 BMRF 127.3 PL 3 Tactical FM
154.71000 155.67000 KMC308 F 123.0 PL CLERS Diablo FM

According to radioreference.com it looks like Contra Costa county sheriff
(on VHF, not UHF) provides services to Baypoint and uses the East dispatch
channel. Try 155.19 with PL of 136.5.

155.19000 155.64000 KMA371 MR 136.5 PL 3 East FM

http://radioreference.com/modules.php?name=RR&aid=707