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MIRBCA

Leaking underground storage tank
Environment, Great Lakes, and Energy

MIRBCA

Part 213 requires corrective actions to be implemented according to ASTM International's (ASTM) risk-based corrective action (RBCA) process.  The ASTM Standard Guide for Risk-Based Corrective Action Applied at Petroleum Release Sites (E1739) provides an overall framework for a tiered approach to corrective action.  This framework is intended to be customized by agencies that implement RBCA.  RRD has developed a MIRBCA Technical Guidance Document that customizes the ASTM RBCA process for implementation in Michigan pursuant to Part 213.   RRD has also developed MIRBCA report forms and instructions to assist in the reporting requirements provided in Part 213 and to provide an RRD-approved approach for implementing the ASTM International RBCA process.  All reports submitted to RRD under Part 213 are required to be developed using the MIRBCA report forms pursuant to Section 21316 of Part 213.  MIRBCA documents, including MIRBCA Technical Guidance, MIRBCA Forms and Instructions, and FAQs, are provided below.

EGLE Logo preceding MIRBCA Technical Guidance
Cover page of MIRBCA Form

Introduction and main concepts

This module introduces the Michigan risk-based corrective action (MIRBCA) process and provides an overview of major concepts and terminology. 

The training provides an overview of site assessment (characterizing geology, receptors, NAPL, soil, and groundwater contamination), risk assessment (determining if the risk is acceptable or unacceptable for current use and future use), and risk management (options to eliminate exposure or reduce concentrations if the risk is unacceptable).  The training provides an overview of an exposure model that is developed for each site, including the differences between a generic exposure model and a site-specific exposure model, and discusses the concepts of exposure domain and representative concentration. 

Groundwater protection and surface water protection exposure pathways

This module describes a Tier 1 and Tier 2 evaluation for the groundwater protection exposure pathway and the surface water protection exposure pathway.

Topics include: the Tier 1 and Tier 2 exposure model for each pathway, including source area, point of exposure, and point of compliance; evaluation of pathway completeness for current use and future use; development, use, and applicability of risk-based target levels (RBTLs), and risk management options.

Volatilization to indoor air exposure pathway

This module describes a Tier 1 and Tier 2 evaluation for the groundwater protection exposure pathway and the surface water protection exposure pathway.

Topics include: the Tier 1 and Tier 2 exposure model for each pathway, including source area, point of exposure, and point of compliance; evaluation of pathway completeness for current use and future use; development, use, and applicability of risk-based target levels (RBTLs), and risk management options.

Surficial soil pathways, right-of-way evaluations, and plume stability

This module describes a Tier 1 and Tier 2 evaluation for the surficial soil exposure pathways, which includes direct contact, volatilization to ambient air inhalation, and soil particulate inhalation. 

The training also provides an overview of the evaluation required in highway and road rights-of-way, and methods of evaluating groundwater data to determine dissolved plume stability.

Contact Information

Remediation and Redevelopment Division
Steve Beukema, Part 213 Coordinator
BeukemaS@Michigan.gov or 269-547-0125