Laboratory Fume Hoods

1. Laboratory Fume Hoods California State University Fresno In accordance with Title 8 CCR Section 5154.1, Ventilation Requirements for Laboratory-Type Hood Operations. CSU Fresno, Environmental Health & Safety (559) 278 - 7422

2. IntroductionPurpose of a Laboratory Fume Hood • Laboratory Fume Hoods help prevent exposure to fumes, vapors and particulate matter from hazardous substances.

3. IntroductionFunctions of a Laboratory Fume Hood • Fume hoods draw airflow inward, away from the worker.

4. Operator QualificationsTraining Requirements • To operate a fume hood, one must be trained to: • Use the hood properly and safely. • Determine last performance test, and if requirements are met. • Understand the general hood purpose, airflow characteristics, and potential for turbulent airflow and escape of hazardous substances from the hood. • Know where the quantitative airflow monitor or alarm system is located on the hood and how it is used to indicate an inward airflow during hood operation 8 CCR 5154.1(f)(3)

5. Pre-Use InspectionOverview • Check for last inspection date by EHS. • Postings or signs should be present when a fume hood is out of order and EHS is aware. If you suspect your hood is not working contact EHS immediately at 278-7422. • Check quantitative airflow monitoring device to ensure hood is working properly. • Use qualitative methods to ensure air is flowing in the proper direction.

6. Pre-Use InspectionDetermining last inspection • Each fume hood must have inspection record indicating: • Last date of inspection. • Initials of the last inspector of the device. • Whether the device passed or failed inspection. • This data sheet is normally attached to the fume hood. • Units that fail an inspection are tagged with a “Do Not Use” sign with a date the unit was taken out of service. • Units must be re-inspected: • Annually. • After any repair. • Following any addition of large equipment to the unit.

7. Pre-Use InspectionQuantitative Monitoring Devices • A hood user must quantitatively identify whether their fume hood is working properly. The method must measure an exact or approximate rate of inward airflow. • Acceptable devices to determine quantitative airflow include: • Inclined Manometers • Diaphragm Pressure Gauges • Vane Gauges • An Airflow Alarm System is also acceptable, granted thatthe “system provides an audible or visual alarm when the airflow decreases to less than 80% of the airflow required by subsection” 8 CCR 5154.1(e)(3)(A) • All values indicated on the device should be no less then those indicated on the certified“safe level” indicated by the label on the fumehood.

8. Pre-Use InspectionExamples of Quantitative Monitoring Devices • Vaneometer • Rare on campus, but acceptable. • Inclined Manometer • This device is very common on campus. • Diaphragm Pressure Gauge • Rare on campus, but acceptable.

9. Pre-Use InspectionExamples of Quantitative Monitoring Devices Fume Hood Alarm Device • Alerts the user if there is inadequate inward airflow • Visually • Audibly • These units should have a visual aid of some sort indicating that the unit is functioning and is safe to use.

10. Pre-Use InspectionExamples of Quantitative Monitoring Devices • If you do not have a working qualitative method to assess if the fume hood is functioning properly, contact EHS at 278-7422.

11. Pre-Use InspectionQualitative Inspection Methods • Examples of Qualitative Devices include: • Kimwipes / Delicate Wipes • Tape • Mylar Strips • The device used must demonstrate airflow is flowing inward.

12. Pre-Use InspectionQualitative Inspection Methods • The material used (kimwipe, mylar or tape) should be pulled in by the fume hood to indicate there is inward airflow. • The material must be tested in multiple areas where the hood is open. • If you are having trouble or do not note the inward movement of air, make sure you have remembered to turn the unit on.

13. Using the Fume HoodWork Practices • The sash of the fume hood may be raised completely during usage, unless marked otherwise. • If markedthe hood shall be opened no further then the safe operating level, indicated by the arrows, when in use.

14. Using the Fume HoodWork Practices • Store non-essential chemicals and other equipment outside of the fume hood. • Keep the hood free from obstruction of large equipment whenever possible. • Storage of hazardous waste containers not related to the wastes being generated within the hood is not advised. • Incompatible wastes are required to be separated and closed during storage, except when it is necessary to add waste • Do not put your face inside the fume hood when hazardous substances are present. • Always keep your face and body outside the unit when in use.

15. Have Concerns?When should you contact EHS with any concerns? • Annual Inspection • If you note that an inspection was not completed within one year. • Maintenance • Repairs • Addition of Large Equipment • Newly Installed Hoods • You suspect your fume hood is not protecting you adequately for any reason.

16. Training Completion Acknowledgement form • Please either print out a copy of this slide or request a hard copy from your Department Safety Coordinator or Supervisor. Please sign/date in the spaces provided, and then forward it to your Department Safety Coordinator or Supervisor. I have read the slides presented in the Laboratory Fume Hoods Power Point presentation and have reviewed the associated department-specific plans. Name (Print)_________________________________________________ Signature ___________________________________________________ Department _________________________________________________ Date _____________________________

17. Contacting Campus Environmental Health and Safety For questions and concerns, please call California State University Fresno Environmental Health and Safety Department at: (559) 278 - 7422