Whatever they'll call it, there'll be a dragstrip and motorsports facility there in the same pace Firebird has lived.
The grandstands, timing system, track prep vehicles, pencils, paper, xerox machines, water fountains, etc. that were owned by the previous leaseholder were disposed of and sold by that leaseholder.
That was his property and he can do what he wants with all of it, hence they stayed in the main office until May 15 to recoup his investment and dispose of his property.
Things can get ugly during the times of transition of anything, but disposing of your own stuff is perfectly legal and expected.