Dave Lemper wrote:
The soil in central Texas is called Caliche with a lot of clay,
CaCO3 & shale. Attempting to drive in a ground rod
yielded only a mushroom on top & blisters on me.
[...]
Any suggestions appreciated.
Dave WB3DWE

I'm having thoughts of steel pipes filled with
muriatic (swimming-pool) acid eating through
the caliche chemically. Usual acid-handling
precautions would definitely apply.

Jim, K7JEB