Accession Number:

ADA610694

Title:

Acute Exposure Guideline Levels (AEGLs) for Time Varying Toxic Plumes

Descriptive Note:

Memorandum rept.

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC LAB FOR COMPUTATIONAL PHYSICS AND FLUID DYNAMICS

Personal Author(s):

Report Date:

2014-09-12

Pagination or Media Count:

30.0

Abstract:

Toxic airborne contaminants, when inhaled, can cause adverse health effects. The U.S. EPA tabulates three Acute Exposure Guideline Levels AEGLs for predicting the onset of these adverse effects from specific length exposures to specific concentrations of toxic chemicals for a general population. Inhalation exposures in the real world, however, vary strongly in space and time and thus do not correspond to the specific durations and exposure levels tabulated by the EPA-a complication that EPA does not resolve. This report gives an accurate, science-based algorithm with fast, easy-to-use software to fill this gap. The software package, called EAGLE, predicts the onset of AEGL 1, 2 and 3 conditions for an arbitrary airborne agent time history supplied by the user. EAGLE can be used with field data, sensor data, wind tunnel measurements, Computational Fluid Dynamics models and rapid-response plume prediction software to convert agent time histories into meaningful actionable health effect predictions. It can also be used to predict the strong effects of realistic concentration fluctuations and to compare plume prediction models in a meaningful way.

Subject Categories:

  • Anatomy and Physiology
  • Inorganic Chemistry
  • Computer Programming and Software
  • Fluid Mechanics
  • Environmental Health and Safety

Distribution Statement:

APPROVED FOR PUBLIC RELEASE