I feel certain this logging is the Duke Power Oconee Nuclear Station. Today (EST) at about 12.04 PM they had a round of radio checks lasting for around 4 minutes. Net lead was "control", tone 156.7, same frequency. They called around12 Sierra units,18 Bravo units, a couple of Charlie units. Signal a bit rough--some of these could have been multiple calls to units that did not initially answer.
They have a really impressive comms /rad monitoring/ meteorology structure made out of large "I" beams, like the exoskeleton of a massive rectangular castle tower. This structure does not taper down, and may well be 24X24 ' square - or perhaps larger. Just my inexpert guess for all that, but the monstrosity is very close to the highway as you drive past the "Station", and it does have antennas and other gear up top.
They had a round of radio checks right after midnight last night too. This seems a bit off for "company" use on a national interop channel, but Duke has Power. I think I may retire this frequency, as this is my "quiet " radio, and radio checks do not interest me.
I used to hear the Oconee site check in many years ago on a vhf low band interop frequency--and when the Channel Master 5094 was up, I heard the Savannah River Site check in a couple of times. Might have been the state Emergency Management Division net. That seems a stretch to me, but I did hear it, the Radio Shack Pro 2006 ruled!