Hi,
Is one sure they know if there lab is safe?  Sure hoods are 
checked but what is safe??  I had a lab partner that became 
chemicial sencitive and had to quiet her job.  If you can smell it, it 
must be bad, xylene, hemo de, etoh's, if they don't smell thats 
even worse.  I try and work with a window open all year long, just to 
give myself peace of mind. 
sheila.cleveland@orst.edu