if you want to "wash" sand get a large container and put in the sand put a hose all the way to the bottom and let it run the organic crap will float to the top as the sand fluidizes. stir is alot to release all the organic matter you can. you will lose some sand but its important to get as much of the organic crap out as possible so dont worry about the sand loss too much. then let it dry on a tarp or something. if you leave it in the bucket it could tank weeks or longer to dry.