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It is important to promptly clean up spills, remembering to always wear your PPE. The supplies for cleaning up spills and any associated paperwork should be located in the immediate vicinity of the laboratory. Every lab should have eye washing stations that are maintained properly in case of chemical ocular exposure. Know What You're Working With Always know the hazards for each material that is being used; if you are unsure check the Safety Data Sheet. When working with aerosols or volatile chemicals, use a fume hood. Fume hood sashes should be kept closed as much as possible, and do not store chemicals in fume hoods. Remember, it is better to be safe than sorry: treat every chemical as if it were hazardous. Use the Smallest Possible Amount Use the smallest amount of chemicals possible, but never return chemicals to the reagent bottles. Never mouth pipette, always use a bulb. Be aware of the various chemical exposure routes: dermal contact, inhalation, ingestion, ocular exposure, and injection. Follow all Safety Procedures Wear proper PPE and follow personal safety practices at all times when working in a labora- tory. Lab coats, gloves, and safety glasses should be worn as appropriate. Shorts, sandals, or open-toed shoes should not be worn in the laboratory. It is best to secure any jewelry, loose clothing, or long hair before working to prevent any entanglement from occurring. Always wear proper eye protection when using chemicals. If you Don't Know . . . Ask! In all situations, ask if you are unsure of ■ Emergency procedures ■ Laboratory rules ■ Safety information ■ Chemical locations ■ Proper disposal of chemicals ■ How to complete a task With any concern that you are not properly trained in or confused about, always ask! For more information go to OHSKs guidance on the topic: https://www.osha.gov/ Publications/laboratory/OSHA34041aboratory-safety-guidance.pdf. 58