Based on the info from this thread:
http://www.radioreference.com/forums...ad.php?t=82540
they are NOT trunked. (Radio Service IG - Industrial/Business Pool,
Conventional) Even if they were, you would still hear 90% of the traffic on any frequency programmed for conventional.
When you hear traffic on 462.3500 , immediately switch to 467.3500. This should be the portable input to the repeater 462.3500. If you don't hear them, you are probably not close enough. As for the other 2 repeaters(station class FB2), they may not be using them yet. You should hear them equally as well if they are, so keep listening...maybe very infrequent use.