Risk-based site evaluation guidance

The Minnesota Pollution Control Agency has developed guidance outlining a risk-based approach to decision making during site investigation and remedy selection under the state's Superfund and Brownfields Programs. The Risk-Based Site Evaluation (RBSE) Manual provides a tiered process for making decisions based on an evaluation of risks to human health and the environment. MPCA staff with expertise in risk assessment, soil physics, hydrogeology, and remediation technologies have developed the following risk guidance.

The RBSE manual includes individual documents describing the process of site characterization, community involvement, evaluating the risk to human health and the environment posed at a site, and how to address that risk. Working drafts of the manual documents are maintained here.

What's new

This form is applicable to all Remediation Division programs (January 2016)

PDF icon Guidance for estimating the cancer potency of mixtures of polycyclic aromatic hydrocarbon (PAH) mixtures in environmental samples (MDH)

This guidance recommends a revised method to evaluate carcinogenic PAHs (cPAHs) using relative potency factors (RPF) instead of potency equivalence factors (PEF) and an alternative surrogate mixture method using 7X the concentration of benzo[a]pyrene (BaP). Six new cPAHs were added to the list to analyze and ten were removed. (Minnesota Department of Health; February 8, 2016)

MPCA Interim Policy. Although it is MPCA's practice to adopt MDH's guidance, since laboratory analytical methods are not available to analyze the six additional cPAH compounds added to the RPF list, it is not feasible at this time. MPCA and MDH are working together to develop analytical methods for the new cPAH compounds. Once analytical methods have been established MPCA will re-evaluate the feasibility of implementing this guidance. Until then, MPCA will continue to use the PEF method to evaluate human health risks from cPAHs. 

Current RBSE manual documents