A risk-based corrective action (RBCA) process provides a framework for remediation decisions at contaminated sites. It protects human health and the environment while allowing constructive current and future site use.
Using a risk-based process, site remediation is based on site-specific human health and environmental risk from exposure to contamination. Safe levels of contaminants of concern are based on land use (residential or non-residential) an the analysis of exposure pathways such as direct exposure to surface soil, groundwater use, vapor intrusion into buildings, and others.
In some cases contamination may be left in place with appropriate controls, whether engineering or institutional controls or both, to ensure long-term protection.
A risk-based framework can streamline the process of site cleanup and closure, streamline decision-making, clearly define endpoints and focus finite resources (both private and public) on sites with the highest current or potential risks. By adopting a risk-based process that applies to most contaminated sites, the department can provide greater consistency in its decision-making.