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IDEM Plans Technical Workgroup Meetings for RISC Technical Guide Revisions


In cooperation with the Midwestern States Environmental Consultants Association, the Indiana Department of Environmental Management (“IDEM”) announced its intention to form focused technical workgroups to address various topics related to revisions of the IDEM’s Risk Integrated System of Closure (“RISC”) Technical Guide. The IDEM is seeking to identify subject matter experts to provide input and information in developing the technical basis for RISC policy and guidance on the following issues: contaminant plume stability, background constituent levels, closure levels, and site characterization. The IDEM seeks two to three external subject matter experts on each topic who will participate in the technical workgroups along with IDEM subject matter experts, representatives of the IDEM’s RISC policy decision-making group (Bruce Oertel – Remediation Services Branch Chief; Laura Steadham – Science Services Branch Chief; Michael Anderson – Senior Risk Assessor and RISC policy expert; and Jeff Sewell – Risk Services Section Chief), and IDEM’s Risk Assessor and lead RISC Technical Guide editor, Mike Habeck. According to the IDEM, the work groups are intended to provide stakeholder input prior to the IDEM drafting guidance that will be released for comment by RISC stakeholders at large.

If you are interested in participating as a subject matter expert in a technical workgroup, or would like to recommend a subject matter expert to the IDEM, contact Jeff Sewell at

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