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.
This form is applicable to all Remediation Division programs (January 2016)
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
- Air Impacts Evaluation
- Community Involvement in Risk-Based Decision Making
- Groundwater Guidance
- Natural Attenuation of Chlorinated Solvents in Groundwater
- Remedy Selection
- Sediments - Human Health and Ecological Evaluation
- Risk-Based Site Characterization and Sampling Guidance
- Guidance on Incorporation of Planned Property Use into Site Decisions
- Risk-Based Guidance for the Soil-Human Health Pathway User's Guide
- Surface Water Pathway Evaluation
- Best Management Practices for the Off-Site Reuse of Excess Fill from Development Sites (c-rem1-01)
- Working draft: Surface Water Pathway Evaluation User's Guide (c-s4-01)
- Appendices (file size = 2.6 MB) (c-s4-01a)
- Surface Water Toxics Impact Assessment Request form (c-rem4-44)
- Table 8: Tier 1 Surface Water Screening Numbers for all Non-ORVW or OIRW Waters (c-s4-01b)
- Table 9: Tier 2 Surface Water Standards and Criteria for Classes 1B, 2A, 3A or 3B, 3C, 4A, 4B, and 5 Waters (c-s4-01c)
- Table 10: Tier 2 Surface Water Standards and Criteria for Classes 1B or 1C, 2Bd, 3A or 3B, 3C, 4A, and 5 Waters )c-s4-01d)
- Table 11: Tier 2 Surface Water Standards and Criteria for Classes 2B or 2C, or 2D, 3A or 3B or 3C or 3D, 4A or 4B or 4C, and 5 Waters (c-s4-01e)
- Table 12: Tier 2 Surface Water Standards and Criteria for Classes 7, 3C, 4A, 4B, and 5 Waters (c-s4-01f)
- DRAFT - Ground water policy document (1998)
- Executive Summary of the draft ground water policy document (1998)
- Please access current drinking water criteria on MDH and EPA’s websites.
- Guidelines for natural attenuation of chlorinated solvents in ground water (May 2000, Revised June 2006) (c-s4-05)