Toxicity of Military Smokes and Obscurants Volume 2 (1999) / Chapter Skim
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1 Introduction
1 Introduction
Pages 9-17
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From page 9... ...
THE SUBCOMMITTEE'S TASK To ensure that exposure to smokes and obscurants during combat training wait not have adverse health effects on military personnel, the Office of the Army Surgeon General requested the National Research Council (NRC) to review the data on the toxicity of military smokes and obscurants and recommend exposure guidance levels for military personnel during combat training and for the general public residing or working near milita~y-training facilities.
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for possible repeated exposures of the public residing or working near military-training facilities (referred to as permissible public exposure guidance level in Volume 11. All four guidance levels should take into account embryo and fetal development and reproductive toxicity in men and women.
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. For example, in normal work situations, a degree of upperrespiratory-tract irritation or eye irritation causing discomfort would not be considered acceptable; during an emergency, it would be acceptable if it did not cause irreversible harm or seriously affect judgment or performance.
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For purposes of assessing military smokes and other obscurants for the Army, the subcommittee developed two additional guidance levels, REGLs and RPEGLs. The subcommittee defines a REGL as the concentration of a substance in air to which healthy military personnel can be exposed repeatedly, up to a specified total exposure on a weekly basis (usually ~ hr per day, 5 days per week)
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For purposes of assessing military smokes and other obscurants, the subcommittee developed comparable procedures for developing REGEs and RPEGEs. The steps in developing exposure guidance levels are similar for EEGEs, SPEGEs, REGEs, and RPEGEs; the differences reflect attributes of the exposed populations and the duration and frequency of exposure.
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From page 14... ...
~ times the REGLs to protect more susceptible subpopulations in the general public. CONFIDENCE LEVEE IN USING THE PRODUCT OF UNCERTAINTY FACTORS In recommending exposure guidance levels for the various obscurants, the subcommittee has had to rely on the use of uncertainty factors in an
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Thus, the recommended guidance levels developed are not precise, because the exact magnitude of the uncertainties is unknown. The product of the uncertainty factors results in high confidence that the overall factor is large enough to protect susceptible subpopulations adequately from long-term exposures.
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1996. Evolution of science-based uncertainty factors in noncom cer risk assessment.
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From page 17... ...
Washington, D.C.: National Academy Press. NRC (National Research Council)
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