Return chemicals to their storage location and clean chemically contaminated surfaces after every workday.
  Leaving the Laboratory

After completing your work for the day, or anytime you leave the laboratory, remember to take the following actions:
Stabilize your experiment, equipment, or process
Decontaminate working surfaces and equipment as necessary
Return chemical containers to proper storage locations
Make sure chemicals in beakers, flasks, etc. are labeled
Make sure all chemical hazardous wastes are placed in labeled containers in the satellite storage area of your laboratory
Dispose of PPE and wash thoroughly
You can get more information on managing chemical hazardous waste by taking the Chemical Hazardous Waste Management Training Program linked from the Yale University OEHS web site.