An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to www.epa.gov. This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Office of Inspector General

Report: Response to EPA Administrator’s Request for Investigation into Allegations of a Cover-up in the Risk Assessment for the Coal Ash Rulemaking

Report #10-N-0019November 2, 2009

What We Found

We closed this investigation because we found no evidence warranting additional inquiry into the rulemaking process for CCW disposal in landfills or surface impoundments.

Report Materials

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.