I don't think it's a problem. The clean rooms I have seen have all workers wearing protective clothing (jumpsuits, hairnets, hats, goggles, gloves, etc.). Also it's the dust they are trying to keep out. You should be fine as long as you take care to keep yourself clean and protected.
dx proctitis in 1987
dx UC in 1991, was stable until 1998
1998 started prednisone, asacol, pentasa, nortriptylene, ativan, 6MP, rowasa enemas and suppositories, hydrocortisone enemas, tried the SCD diet, being a vegetarian, omega 3s, flax, pranic healing, yoga, acupuncture, probiotics
2000 lost all my B-12 stores and became anemic
2001 opted for j-pouch surgery- now living life med-free