For the past few days I've been picking up some chatter on 154.325 with a PL of 156.7 on my Pro 97. I'm just outside of Philly in Delco so normally I pick up the Upper Darby Fire Department Operations (simulcast of 506.6625 using a PL of 107.2) on this channel. Whatever I'm hearing on this, it is distant. I know Norristown uses this frequency for fire operations but they use a 136.5 PL. Cumberland County, NJ uses it as well but with a PL of 179.9. Any idea what I'm hearing?