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Title: The Air Apparent
Author: Peter W. Preuss
Source: American Gas Association 1984
Year Published: 1984
Abstract: The determination of risk from indoor air pollutants is complex and difficult. At the present time there are many gaps in our knowledge about indoor air pollutanis and consequently any risk assessment that we attempt to do is, of necessity, very limited. Nevertheless, there are enough data available to permit us to assess some of the risks, from some of the pollutants, to which some of the population are exposed. For a single pollutant of interest many different lexicological end-points may be of concern. For example, in a healihy population a pollutant may be an irritant at a high concentration, and produce no obvious effects at a low dose. On the other hand, certain populations such as asthmatics or people with hyperreactive airways could be significantly affected at much lower levels of exposure. This is illustrated in Figure 1, which contains a number of curves ihat describe a single toxicological end-point for different populations exposed to the same pollutant.

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