[ke0me]

in traditional telecom offices, the ground system was "star", i.e. all grounds ran separately to a single point ground, and the ground field was installed and tested to meet a required standard with a ground resistance test unit by Megger (current price $843). Never did the test myself, but saw it performed several times.

However, if it was considered a "radio site", then it had a ground halo ring around the ceiling of the radio area, with multiple grounds fields outside.

If I recall, the instructions for grounding were probably about 200 pages long of how to perform all the required work.

I don't plan to go to the same extent as that (and I can't afford it either).

My feeling is that you need to be consistent in the method you apply, and test the result one change at a time (as noted earlier).