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Source: David R. Patrick, ed, 1994, Toxic air pollution handbook (New York: Van Nostrand Reinhold).

Source: David R. Patrick, ed, 1994, Toxic air pollution handbook (New York: Van Nostrand Reinhold).

in symptoms that could impair the ability to take protective action. Level 3 is the concentration below which most individuals could be exposed for one hour without experiencing or developing life-threatening health effects.

The National Research Council for the Department of Defense has developed EEGLs. These levels may be unhealthy, but the effects are not serious enough to prevent proper response to emergency conditions to prevent greater risks, such as fire or explosion. These peak levels of exposure are considered acceptable in rare situations, but they are not acceptable for constant exposure.

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