question:
hi, and infinite kudos.
the time warner center at columbus circle (nyc) has workers clean the streetlevel stone with organic solvents. i've seen mainly acetone. since i walk past there i get to breath the stuff.
are there any laws concerning pedestrian exposure to toxic cleaners, or is this industry (stone cleaning) unregulated? are there any legal challenges on record? is there a requirement to have an environmental impact assessment on public record?

i'm basically looking for strategies for legal and public relations challenges.

thanks!