First Exposure Time

Definition - What does First Exposure Time mean?

First exposure time is the length of time that a worker is initially exposed to a hazard, such as excessive noise, harmful chemicals or gases, and asbestos.

In many cases, the first exposure to the hazard will not result in any detectable signs of contamination.

In the United States, workplaces must adhere to permissible exposure limits (PEL) and ensure that their workers are not exposed to hazards in a greater amount or severity than dictated by the PEL.



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Safeopedia explains First Exposure Time

Initial exposure to harmful chemicals requires immediate treatment and response. Washing chemicals off the body and clothing or flushing out the eyes should occur within the first 10 to 15 seconds of exposure.

Emergency showers and eyewash stations allow affected workers to treat themselves immediately, keeping the first exposure time to a minimum.

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