Hazard Communication Standard.

29 CFR 1910.1200 is what an employer owes an operator, and it is four concrete things: a written hazard communication program, a list of the hazardous chemicals actually present, a label on every container in the work area, and safety data sheets readily accessible during each work shift. Training is owed at initial assignment and again whenever a new chemical hazard enters the work area, not once a year as a slide deck. Shops treat all of it as filing, and it fails on the floor in the same three places every time: the SDS binder lives in the office, the decanted pretreat bottle carries a marker scrawl instead of a product identifier, and the temp who started Tuesday was never walked through either. Electronic access counts, as long as nothing stands between the operator and the sheet. Every one of those gaps is a document the employer was already supposed to have, which is why they are cheap for an inspector to find and expensive to explain.