There are no federal regulations regards refining. They were all abandoned on Jan 1, 1975.
What you will face is local regulations and EPA. There are countless regulations regarding the disposal of the hazardous wastes that you will generate.
Many of the readers here have spent endless time coming up with great ways to minimize, or safely dispose of wastes. I suggest you do a great deal of reading before making any decisions.
I also recommend you get a copy of Hoke's book, so you will gain a little insight on the refining process. It won't discuss the processing of e scrap, but beyond that, it's pretty much the same game. You'll come to realize that if you know and understand Hoke, you can refine most anything that comes along.
Harold