UCR

UCR Policies and Procedures

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Campus Policy Number: 425-36

Fume Hoods - Chemical

Policy Owner: Environmental Health & Safety
Effective Date: 1/15/94

  1. REFERENCES
    1. Title 8, California Code of Regulations, Section 5154.1, Section 5209.5142.
    2. Title 24, California Code of Regulations.
    3. Industrial Ventilation Handbook, 19th Edition, ACGIH.
    4. UCR Chemical Hygiene Plan

  2. POLICY
  3. All campus laboratory fume hoods shall be inspected at least annually by the Environmental Health and Safety Office (EH&S). The hoods which do not meet performance standards will be temporarily excluded from use until they are repaired by Physical Plant/contractor and re-inspected by EH&S.

    1. Operational Requirements
    2. Fume hoods will be maintained at an average linear face velocity of at least 100 linear feet per minute (lfm) at a sash height not lower than 18 inches, and with a minimum of 70 lfm at any measured point. Sash height will be marked for safe usage of hazardous materials at the time of inspection. Face velocities greater than 150 lfm will be evaluated for the specific use and may not be appropriate for some applications.

      Fume hoods shall be ducted to the exterior of the building.

      Fume hoods shall have a sash for the purpose of adjusting inlet area in order to vary the face velocity at the inlet unless the average velocity is maintained at 100 lfm when using hazardous materials.

      It is recommended that newly installed fume hoods have an approved flammable liquid storage cabinet at its base.

      Fume hood exhaust stacks shall extend at least 7 feet from the roof line. No weather caps shall be added.

      No fume hood shall be used for a function for which it is not designed.

    3. Inspection
    4. All the fume hoods will be inspected by EH&S. Annual inspection will include:

      1. Air Flow Survey
      2. Face velocity and maximum safe operating sash height. Also, a smoke test may be conducted to determine the direction of air flow and presence of cross-drafts or turbulence.

      3. Physical Inspection
      4. Any conditions which may cause inadequate performance (e.g., hood located opposite air conditioner supply register, gas cylinders stored in front of hood, etc.) will be noted and the users informed about the conditions.

        All inspection/performance information will be documented by EH&S. Maximum sash operating height, average face velocity, date of inspection, and the name of the person performing the survey will be recorded. A yellow certification sticker will be placed on the side of each hood passing inspection with an arrow at the level indicating the maximum safe operating sash height.

        Hoods which do not maintain a minimum face velocity of 100 lfm will not receive a certification sticker and will be labeled "DO NOT USE". These hoods shall be referred to Physical Plant for maintenance.

    5. Follow-up Service
    6. After repairs are completed, fume hoods will be rechecked and approved for use by EH&S.

    7. Miscellaneous
    8. All new installations, or modifications of existing fume hoods are to be reviewed and approved by EH&S before the project commences. After the completion of the project, the hood shall be evaluated, and approved for use by EH&S prior to actual use.

      EH&S will perform air flow measurements on any fume hood upon request.

      EH&S will maintain evaluation records of all fume hoods on the campus.

      All purchase order requests for fume hoods shall be reviewed and approved by EH&S prior to acquisition.