In one of our buildings we have what we call “Chem ical Laboratory Wing”, and access to that roof is controlled by key which only the Facility Maintenance has. I am the contact between the Maintenanc e and our labs. Policy is Maintenance calls me with date and I check wi th Lab Managers to make sure no one will exhaust chemicals that morning or afternoon.
Goddard Space Flight Center
In general, maintenance staff working on rooftop fume hood exhaust equipment h ave indicated their concerns about being on a roof, and possibly being exposed to whatever is being vented.
In a more specific laboratory situation, involving MOCVD (metal organic chemic al vapor deposition), we have a lock-out tag-out policy, due to the severity o f the toxic gases involved.
Thanks for the feedback.
-Stefan Wawzyniecki, CIH, CHMM
University of Connecticut
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