I need to remove a strip of caliche about forty feet long, eight feet wide,
and in thickness from zero to 12 inches. I have some ideas on how to go
about this, but would like to hear from anyone who has worked with caliche
before.

My ideas a jackhammer with a spade bit, or drilling honeycombs with a
star drill on a rotohammer to a standard plane of depth, and then breaking
the honeycombs off. A layer of sand, then a layer of pavers will be put
over the remaining caliche.

I had my brother in law try ripping it with claws on the back of his
backhoe, but the stuff is too tough.

Ideas appreciated.

Steve