Bill, as you already seem to understand, since sand is primarily silicon it's essentially a non-conductive material. When cutting PVC (trim and pipe) with a power saw, to prevent the shavings from sticking to everything, I've had success spraying Static Guard on tools and materials to minimize this. Static Guard essentially creates a conductive layer on the outside of otherwise non-conductive materials.
Here's a link to a basic explanation of how it works: https://www.techwalla.com/arti...w-static-guard-works
Maybe worth a try.
