Low-Level Exposure Concentration

Significant fatalities (this is above low-level range). 

Defines threshold for fatalities (few personnel impacted this severely, immediate effects). High end of low-level range. 

Severe immediate effects (functional decrement, may require medical attention) and/or severe transient effects, and/or probable concern for pernianent/chronic health effects. 

Threshold for which initial cases of severe and/or permanent health effects may occur in exposed population. 

Some immediate/transient effects with mild functional decrement, limited medical attention required, and/or possible concern for permanent/chronic health effects. 

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