You have to look out for yourself - if you can smell the formalin, it's probably too much. Keep the vents clear, keep containers covered, gross fresh as much as possible, and use formalin-neutralizing pads when working with things already in formalin (biopsies) or rinse the beejeezus out of things fixed overnight. High formalin exposure carries a risk of miscarriage; the scientific evidence is on PubMed although it is not overwhelming and not well controlled.
Your program probably won't make any accommodations, but don't be afraid to ask for neutralizing pads if you don't have them.