Oh, and in case you're worried about chemicals, don't be. Unfinished hardwood lumber is very rarely treated with anything because it's almost always used indoors and doesn't need to resist rot, insects, etc. Most chemicals produce unwanted color changes that furniture and flooring manufacturers (and homeowners) wouldn't want, and they'd have to provide all sorts of disclosures - floors get sanded, sanding releases dust, dust with chemicals in it produces adverse health effects, and adverse health effects produce the US legal system. And finally, lumber that IS treated with something is almost invariably required to be marked/labeled (CCA, ACQ, etc.)
That's one of the reasons hardwood makes such good flooring. You don't NEED to do anything to it. (Note: I wouldn't burn finished lumber unless I knew for sure what it was - shellac is ok, but some of the UV-cured polymers can release bad things when burned. I also wouldn't burn actual furniture. Flooring scraps are likely to be from local sources - it's so cheap to get red oak in the US, why would you import it? But lots of furniture is made in Asia out of lumber harvested there - and is often fumigated with formaldehyde to kill insects for to meet export requirements.)
