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| September 1, 2025 | ||
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This webinar will discuss the following guidance and tools:
- Groundwater Beneficial Use Designation Flowchart: In September 2024, the OSRTI groundwater team in the Science Policy Branch released the Beneficial Use Designation for Groundwater at Superfund Sites, which includes a flowchart for use in groundwater classification. The purpose of this document is to facilitate the evaluation and selection of beneficial use designations for groundwater at Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) National Priorities List and Superfund Alternative (SA) approach sites.
- Monitored Natural Attenuation Checklist: In April 2025, the OSRTI groundwater team in the Science Policy Branch released the Recommended Summary Checklist for a Superfund Monitored Natural Attenuation Evaluation for Groundwater. This checklist identifies criteria to assist in the potential selection and subsequent performance evaluation of a monitored natural attenuation (MNA) remedy for groundwater CERCLA National Priorities List sites and Superfund Alternative (SA) approach sites. It covers a broad spectrum of contaminant classes including organics, inorganics, and radionuclides.
- Technical Impracticability (TI) Waiver Mapping Tool: In July 2025, the OSRTI groundwater team in the Science Policy Branch released the TI Waiver Mapping Tool which provides an interactive map to explore and visualize the relationship between TI Waiver zones and Superfund Site boundaries for groundwater and surface water at CERCLA National Priorities List and Superfund Alternative (SA) approach sites. In addition to the mapping tool, updated TI Decision Fact Sheets have been developed to provide a summary of the site-specific TI profile.
For general information contact CEC Registrar via e-mail at cec-registrar@emsus.com
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