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TLV®/BEI® Resources


Physical Agents Under Study (TLV®-PA Committee)

ACGIH® has a procedure that provides the public with an indication of where those chemical substances and physical agents under study fall in the development process. Tier 1 entries indicate which chemical substances and physical agents may move forward as an NIC or NIE in the upcoming year, based on their status in the development process. Tier 2 consists of those chemical substances and physical agents that will not move forward, but will either remain on or be removed from the Under Study list for the next year. For more information, please see the ACGIH® TLV®/BEI® Development Process.

Tier 1 (may move forward with an NIC proposal in 2014)

  1. Acoustic
    • Noise/Impulse noise

  2. Electromagnetic Radiation and Fields
    • Light and near-infrared radiation
    • Static magnetic fields
    • Sub-radiofrequency and magnetic fields

  3. Ergonomics
    • Hand activity level (added 6/12/13)
    • Hand-arm vibration
    • Localized fatigue
    • Whole body fatigue (Central body fatigue)
    • Whole body vibration (added 6/12/13)

  4. Thermal Stress
    • Cold stress
    • Heat stress

Other Issues Under Study

  1. Hypobaric pressure
  2. Neuroendocrine effects of light

Last update on 07/23/2013. Questions or problems? Please contact us. © 2013 American Conference of Governmental Industrial Hygienists, 1330 Kemper Meadow Drive, Cincinnati, Ohio 45240, 513-742-2020. ACGIH® and related marks are marks of the American Conference of Governmental Industrial Hygienists. All Rights Reserved. Terms of Access. ACGIH® Privacy Policy. Site Map.