In the biography of Gordon Moore, he mentioned that when he was inventing Intel's process chemistry they just routinely poured all their solvents down the same

In the biography of Gordon Moore, he mentioned that when he was inventing Intel's process chemistry they just routinely poured all their solvents down the same drain. The strong acids ate away the concrete (which wasn't noticed until long after), so nearly everything they poured down, went into the ground and hit the water table, then spread out. Moore's excuse was that they didn't really teach chemistry safety when he was in school. Some additional reading here: https://semspub.epa.gov/work/09/100018492.pdf https://semspub.epa.gov/work/09/100018492.pdf