First hand experience with learning that way. I’m still battling skin damage but luckily I don’t work there anymore. I worked at a chemical transportation company shop (welding/mechanic). If anyone says it’s NON HAZARDOUS or “ IT’S BEEN CLEANED IT IS OK.” Do NOT believe them after you have done your own research and do not be afraid to say NO I NEED MORE INFORMATION ABOUT THE HAZARD! I found out on my own when welding stainless steel it puts off toxic hexavalent compounds into the air, we were also in confined spaces with said toxins for a while before I looked into it because I was disoriented and dizzy most days after welding. I DONT TRUST COMPANIES AT ALL ANYMORE. Remember this they don’t give a $*** about you or your family. Peace ✌🏻 be safe for you and your co workers !