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IV. FACILITY AND OPERATIONAL SAFETY RULES

A.  Laboratory Fume Hoods

The best method to prevent the release of hazardous chemicals into the laboratory is to conduct all work inside a properly functioning fume hood.  The following rule should be followed:

  1. Airflow on all working fume hoods should be between 60 to 100-lfm minimum with the sash at 14”-20” above fully closed position.
  2. Never store chemicals or other items in a fume hood that is also used for laboratory work.
  3. Fume hoods that are not being used for laboratory work should have the sash fully closed.
  4. All fume hoods should be equipped with a device to enable user to determine that the hood is properly functioning.
  5. Equipment and chemicals should be placed as far from the hood face as practical to prevent emission from escaping.
  6. Work should be performed with the hood sash in the lowest practical position.
  7. Procedures involving highly toxic substances should be performed in a glove box-equipped hood.
  8. Check inspection and restriction labels on hoods before using.
  9. Never block the fume hood vents.
  10. Do not alter any fume hood ventilation system.
  11. Contact maintenance and Operations for repair or with alteration questions.
  12. Always clean the hood when a procedure is completed.
  13. DO NOT use PERCHLORIC ACID in ANY FUME HOOD unless it is a designated “perchloric acid use” hood.
  14. Keep laboratory doors closed.  This will minimize crosscurrents, enhance hood performance, and keep odors from spreading throughout the building.

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