I worked at a site out in the country for years that was mostly chemical labs. Before my time, folks would take their chemical waste and throw it in a pit out back. There must have been 300 labs at least in the facility. They paved that over for manager parking, but the site was/is a Superfund site. When the company shut down serious R&D, they tried to sell the facility (which in fact is very nice) but couldn't because of the dump. I think it still stands there derelict, but maybe they tore it down.
I looked it up, it was torn down in 2016. They had a major expansion in 1988. That part was super nice.
I liked working there mostly.