Dust at workplace

Dust at workplace: Good afternoon Science ASSIST.

There is construction(renovation) going on adjacent to my lab. A hole has been knocked down to create an entrance to the new student's lab and the renovation of two additional classes for the Science area. While the construction is going on, we are still expected to carry out our duties.

My HOD is really good and told us to minimise going into the lab. The whole lab is covered in very fine crystalline silica from the cutting of the bricks and the concrete slab (to put in new wiring). Nothing has been said about the clean up after the work has been completed. We were told the work should only take 2 1/2 weeks. Could you advise on what our rights are with regards to this matter please. Should the lab technicians be responsible for the clean up?

The dust is in every nook and corner of my lab.