CPM is literally not.
It is counts per minute in an undefined, arbitrary sensor. Which could have a alpha radiation transparent sensor (and hence show alpha particles), or be from a low sensitivity geiger counter which can only detect high energy gamma radiation (for say fallout/emergency use). https://en.wikipedia.org/wiki/Geiger_counter
It could have a small sensor, and hence require high flux for a given CPM, or a physically large one - and catch more disintegrations per minute/CPM for the exact same actual amount of radiation.
As to why it is in a government document is why we’re all wondering what is going on. It certainly isn’t the only WTF thing the government is doing right now, is it?
