An official website of the United States government.

We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Risk Assessment

Role of Background in the CERCLA Cleanup Program

This document clarifies the U.S. Environmental Protection Agency (EPA) preferred approach for the consideration of background constituent concentrations of hazardous substances, pollutants, and contaminants in certain steps of the remedy selection process

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.
  • Role of Background in the CERCLA Cleanup Program (PDF)(10 pp, 148 K)
    This document clarifies the U.S. Environmental Protection Agency (EPA) preferred approach for the consideration of background constituent concentrations of hazardous substances, pollutants, and contaminants in certain steps of the remedy selection process