Frequent Questions

What are the critical changes between the 1992 and 2017 version of the PAG Manual?

Since 1992, the PAGs have been updated three times; the following major changes have been made and are incorporated in the 2017 PAGs:

  • Clarifying planning considerations related to the lower FDA Potassium Iodide (KI) guidance
  • Deleting the thyroid-based evacuation threshold
  • Providing additional language on using the Federal Radiological Monitoring and Assessment Center (FRMAC) derived value tables
  • Adding information from the appendices of the 1992 PAG Manual on how the PAG levels were set
  • Providing explanation about the removal of the Relocation PAG of 5rem over 50 years to avoid confusion with long-term cleanup goals
  • Applying the PAG Manual to incidents other than just nuclear power plant accidents
  • Referring users to current food guidance from the Food and Drug Administration (FDA)
  • Providing basic planning guidance on reentry, cleanup and waste disposal
  • Incorporating late phase (cleanup) guidance from the Department of Homeland Security’s Radiological Dispersal Device/Improvised Nuclear Device Planning Guidance
  • Adding a two-tiered drinking water guidance addressing both people at the most sensitive life stages and also the general population

 

For more information about the PAG Manual, visit the PAGs page on EPA.gov.

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