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Technical Services - Risk Assessment and Hydrology
National Information
Our mission is to provide state-of-the-art
information and
expertise in the areas of human and ecological risk
assessment,
hydrogeology, pollution prevention, and
other technical areas. Our goal
is to provide the site
and facility cleanup staff, other EPA, state, and
public
stakeholders the best available scientific information for
document
development and decision making.
November 2011 Update: EPA has released the updated Regional Screening Table in November of 2010. The Regional Screening Level (RSL) table has replaced the Region 3 RBC table, the Region 6 Screening Level table, and the Region 9 PRG table. Region 4 recommends the use of the Regional Screening Level table for all risk assessment screening on Superfund and/or RCRA projects.
Who We Are and What We Do Information- Cleanup Ecological and Health Risk Assessment Bulletins (RAGS Supplement)
- Field Branches Quality System and Technical Procedures
- Groundwater Reference Sources Bibliography.
- Region 4 Federal and State Risk Assessment and Hydrogeology Contacts
- "Technical Protocol for Natural Attenuation of Chorinated Solvents" (PDF)