I have known a couple of people that have used a dry well to install a sink and/or urinal in the garage or shop. For those not familiar with a dry well think of a buried 55 gallon barrel full of pea gravel with the bottom open to drain. Fancy ones are an open bottomed concrete box. They only work if the land perks well enough that the water drains out faster than you feed it enough water to fill the remaining space.
Old farm house down the road from us found their entire septic field was two 55 gallon barrels of pea stone in a sand vein. Been like that probably since they got indoor plumbing in that house. Three teenagers in the house and septic never backed up.
One fellow was in the city but the rest have been pole barns etc. in rural locations. I'm pretty sure none got permits ;-)