55 gal drums at Midwest? Chemical behind the old skyline restaurant. Drive through the loop road until you see big chemical tanks and semi trailers in the parking lot. Get the blue ones and simply wash them thoroughly. If you are going to store water in them for long periods, be sure to treat it properly and keep from direct sunlight. If you want transport tanks, or hot water for a shower get the black ones. I would not drink from those, but properly cleaned they will keep water hot and be more than safe to use.