Lehigh Valley UGI has switched over to Nextel and MDT for communications. Last time we had a truck at our facility the guy was using his nextel the whole time. The MDT had all account information, shut off locations and everything else he needed.
According to a friend in LC, they are on a LTR trunked system. You can hear them on LCN 03 on 463.575 - UGI /PG Energy.
If you don't have a trunking scanner, you can still hear them 95% of the time, but you will also hear others, and may miss some of the conversations. BTW, PG Energy(now UGI Penn Natural Gas) are also on a UHF LTR trunking system in NE PA. UGI Electric is still on low band.