The LCN of 99 indicates that the actual channel number is unknown. From what I've been able to monitor on these two, they appear to be overflow channels. The admin who put them in (I submitted them) decided to list them as LCN 99 instead of unknown LCN for some reason.
the last 2 freqs listed as 99 are not part of that 11ch ltr syst in roxboro
they are a seperate 2 ch syst in center city on which there is a ukn auto parts deliv co and creasant cabs
with the 150 ltr radios they also still have many on the uhf t band freq which the base simicasts on both
systems. if you want the accurate systems and ALL there is on the greater del val freqs and the most
detailed info you will ever find the only place to go is at phillyscanner.com and subscribe to the greater
phila area commuinications guide as it priceless and the editor is one of the best in this hobby !!!!!!!