I definitely gotta give it a listen. I do know that in the recent past, they still have a morse code indentity "beep" which prooves the repeater was still operational. I'm assuming that every PD in Union County has 460.100 programmed as one of the channels in their radios, just in case a problem occurs, i.e. Scotch Plains. HOwever, all countywide crime alerts (and I believe statewide crime alerts as well) are paged out on SPEN 1 (154.680). Union County mutual aid uses 453.150 (however their signal has become quite weak this past year from where I live).
Now, Union County has another frequency that they are licensed to (453.050) and I never hear a PEEP on that frequency anymore. Maybe someone else has more info on that frequency?? I don't even know if that repeater is still up. Another frequency that's NOT in the radio reference database for Union County is Springfield Twp. OEM, which aside from the county radio sytem, uses their Ham repeater, 147.505 MHz.