I'm not sure if I followed you completely, but here's the scoop.
You must bond the grounded conductor to the grounding conductor at the first disco. If that is in the basement(not code, but if so), then that is where the first ground needs to be. You may also need to have a ground rod for the meter base. You really need the disco to be outside the building in this case. I don't know if this answered your question, but maybe it helped.
