It is sometimes necessary to assess the risk to ecological and natural heritage features on-site. This assessment of ecological features involves identification of key species such as trees, birds, wildlife, and invertebrates that may be associated with a site. Then the possible exposure of the site to these key species is represented in a food web description. Following the analysis of exposure of site features such as soil, water, air, and dust in the food web, it is possible to identify what species may be at risk from the site. The risk of transport of soil, water, air, and dust to adjacent sites is also sometimes included in the analysis. Government guidelines identify what concentrations of soil, water, air, and dust are safe to the key species on site and lands adjacent to a site.
After the risk to the species is known, then remediation efforts and habitat restoration activities can be completed, and these are sometimes called risk management measures.
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