To start, I placed five kilos of the barley in a bucket and filled it with water, agitating the grain as I filled. I discovered the grain was very dirty as evidenced by the grey water. With the bucket full to the rim I skimmed off about half a pound of loose, floating material to discard. I repeated this process several times until all of the waste material was gone, the water ran clear and the viable barley was setting nicely at the bottom of the water filled bucket.
I have placed the bucket in a cool closet and will drain the water in about eight hours. The drained grain will set for eight hours and then the process will repeat for a couple days. At that point there should be evidence of growth in the form of chits (root growth).