Risk Assessment
The current regulations in Ontario provide generic standards for soil and groundwater that are to be used in determining whether a site is contaminated and for determining levels that sites should be cleaned up to. However, the conservative assumptions used in determining these generic standards may overstate the risks/hazards a particular chemical may pose to human health or the environment for many sites. In these cases, a risk assessment may be a cost effective option.
A risk assessment involves determining site specific standards that still protect human health and the environment but are based on actual site conditions and land-use characteristics to determine relevant exposure pathways for the contaminants of concern.