The Departmental Missouri Risk-Based Corrective Action (MRBCA) process provides the framework for the process, methodologies and key elements of risk-based corrective action at all departmental risk-based cleanup sites, except petroleum storage tanks. For information about the MRBCA process the department uses to manage petroleum releases at petroleum storage tank sites, visit Tanks Missouri Risk-Based Corrective Action (MRBCA).
The departmental MRBCA process includes three evaluation tiers, with increasing levels of site-specificity, complexity and cost. The majority of sites are cleaned up under Tier 1. The process includes Risk-Based Target Levels (RBTLs) that are conservative, default cleanup levels. RBTLs are used to guide site investigation, determine whether contaminant levels at a particular site require further action (screening) and determine when sufficient cleanup has occurred.
The department's Environmental Site Tracking and Research Tool (E-Start) interactive map allows users to access information about site investigations and cleanups within a specific community or area. For general information about risk-based corrective action, visit Missouri Risk-Based Corrective Action (MRBCA).