You can have multiple ground points per building as long as the ground points are bonded to each other. You can only have a SINGLE tie between neutral and grou

You can have multiple ground points per building as long as the ground points are bonded to each other. You can only have a SINGLE tie between neutral and ground. What we don't know here is if the piping is tied to a grounding rod, or if there is a grounding rod or if the piping is the ground point.