Nothing but your immediate experiment.
Use secondary containment.
Waste to be removed at end of day!
Right Way:
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Wrong Way:
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ALSO:
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DO NOT STORE WASTE IN THE FUME HOOD. If volatile, use a tight fitting lid. You can use the hood for transferring waste to the container, just don't keep the container in the hood overnight.
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DO NOT STORE CHEMICALS in the fume hood unless they are for a current experiment in progress that needs the fume hood.
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It is illegal to intentionally evaporate a solvent from a material for purposes of waste disposal. Just give EH&S the entire package with the solvent for waste disposal.
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The drains have been plugged for a reason. NOTHING is to go down the fume hood drains.
REMEMBER: fume hoods are intended for use when you are doing something with a volitile hazard.
A good example is formaldehyde solutions. Formaldehyde is a strong smelling carcinogenic fixative. It should only be handled in a fume hood and the handler should wear gloves and work carefully to minimize exposure. Perfect use for a fume hood. However, if the hood is not free of clutter you will not be able to work safely.