My Employer Seems To Disregard The Fact That We Work In An Enclosed Space Cutting Tile All Day.

I work at a tile company in Tennessee and upon hiring in and working 2-3 days we had a meeting with HR about silica dust. Apparently it drops into a hopper in the saw room and it needs to be turned on and off by the forklift operators. They admitted that they are retraining the drivers and that they are offering N95 safety masks for the people working in the saw room but we got a single box and it’s optional to wear it and I am the only one that keeps it on. They said that tests were ran as-well and that they came back that our silica levels were fine but our technician spoke up and said that those tests were ran on a day in which they knew there would be 2-3 people in there and the dust would be little to non existent. I’m just wondering if there’s anything legally I could do to give them another kick in the ass without worrying about termination? They keep having the same meeting where they say that it’s still being fixed but it’s been about a year and a half without any kind of solution being found. I’m 18 and see this place as a decent place to work and would like to live to see a career here.