I just had to do a project on this for work and almost if not all of those numbers most likely came from the EPA's site from the studies they reference. Other sources, including international sources are similar, I have no reason to doubt the veracity or the figures.

When rereading your comment I get the impression you think I am saying only 10% of industrial waste is recycled. That is not that statement, the statement is simply 90% of waste in landfill is industrial.