Cheap way to keep the asbestos under control. Unless they classified it as the lowest rating, they would had to bring in someone to take care of it. I'm not sure if they put asbestos in concrete or the coating over the steel (to prevent rust and whatnot). If so, then yeah I could see them spray while they're tearing it down because of that, but it's mainly to knock down the dust so it's not all over the neighborhood. What kind of machinery have they been using? I've only seen the claw looking one. Are they using a big saw to cut the concrete/steel? If so, they would spray on that so it won't overheat as it's cutting. A-jersey was joking B-a saw like that will have it's own water supply and won't need an external hose.