Just don't rinse it down the road.
Some may always end up there but if you do it well, not much.
Just sweep this up on your sanding visit.
A good wet vac is a help, but can be a pain in the arse, especially if no power and you need a gennt too.
Plastic shover, large bucket and hessian type sack, simple and does the job on most. Bad drainage, again, wet vac with pump.