Over regulated as in EPA, OSHA etc on condition, material processing, waste etc. For a quick eye opening, talk to your local 'chrome plating' guys, or stainless steel fabricators.
I know a major catalytic converter manufacturer that was shut down for a month because one day OSHA decided that the whole ventilation system is not sufficient after passing them just few weeks before hence.
Look at what EPA is doing at the moment. All promised and brought to you by....
https://www.youtube.com/watch?featur...NUZVv0A0#t=62s