Some of these aspects are considered here. The hazards are determined from a wide range of information sources relevant to what is planned - a matrix approach is to be recommended. You might wish to access information on occupational hazard identification and risk assessment . Note that once a hazard matrix is constructed it does not necessarily follow that a detailed assessment of all the conceivable hazards must be undertaken. Usually common sense and a preliminary review of available data by a competent professional will indicate which exposures to hazards are likely to be trivial and need be taken no further, and which ones will need a formal assessment of likely exposure.
Young children ingest much more soil, earth, dust and paint than adults.
In other words, after assessing exposures, the exposure-response relationship is the means of translating estimates of exposure into risks to health. It will need an input of the exposure estimates. Other data which may be needed includes information about the characteristics of the population likely to be exposed, and whether some are potentially more susceptible than the general population. Babies are particularly susceptible to nitrates in drinking water. Atopic asthmatics may be more sensitive to respiratory irritants.