We have a new project where we are replacing four smaller buildings with one large factory. The slabs for the existing buildings each had a counterpoise installed. The foundation for the new building will be elevated by a few inches on one side, up to a couple feet on the other, and a new slab poured on top of the old ones. We are talking about installing a new counterpoise around the new foundation for lightning protection. Any reason we can’t also bond to the existing ones?