I was reading an article on how calcium carbonate effects sandy soil in new mexico from a textural point of view. One of the things that jumped out at me was when they were adding clay. Clay acts like a ionizer for the caco3. It could be that the easiest fix for your soil when dealing with higher amounts is to add a scoop or 2 of clay.
Newest organic amendment for high caco3 ppm... cat litter. LOL