Thesis: Exposure Assessment Elements

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Exposure Assessment: Approximating Rates of Exposure

For the purposes of an exposure assessment, a point of contact of exposure is defined as the exposure of an individual to an outside agent, at a specific concentration of the agent, over a particular interval of time (t-e) upon contact of the barrier of the individual's body and the environment (Prezant et. al. 2002). Lung, skin, and gastrointestinal exposure must all be subjected to analysis -- exposure can occur through multiple pathways. However, according to Prezant (et al. 2002), when conducting an exposure assessment of a particular area, such as the remains of the World Trade Towers, it is not always desirable or possible to directly measure the concentration of the substance in question at the moment of contact with the individual in question.

Point-of-contact measurements, after the fact, can provide a reasonable approximation of exposure, particularly if accompanied with time-activity pattern data from existing case studies or simulations. The scenario, the duration, the individuals involved, frequency, and intensity of the exposure must all be taken into consideration. And even under the best of circumstances, some guesswork is always required as "an investigator often does not have data for all aspects of the exposure assessment and the available… [END OF PREVIEW]

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APA Format

Exposure Assessment Elements.  (2009, September 17).  Retrieved December 9, 2019, from https://www.essaytown.com/subjects/paper/exposure-assessment-elements/251947

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"Exposure Assessment Elements."  17 September 2009.  Web.  9 December 2019. <https://www.essaytown.com/subjects/paper/exposure-assessment-elements/251947>.

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"Exposure Assessment Elements."  Essaytown.com.  September 17, 2009.  Accessed December 9, 2019.
https://www.essaytown.com/subjects/paper/exposure-assessment-elements/251947.