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Waste and Cleanup Risk Assessment

Office of Emergency Management

When Congress passed the Clean Air Act Amendments of 1990, it required EPA to publish regulations and guidance for chemical accident prevention at facilities using extremely hazardous substances.


Underground Storage Tanks

Risk-based decision-making (RBDM) is a process in which decisions are made about sites contaminated by releases from underground storage tanks (USTs) according to the actual risk each site poses to human health and the environment

Federal Facilities Management

Federal facilities risk assessments determine the threat levels to human health and the environment at hazardous waste sites that are currently or were previously managed, owned, and/or operated by the Federal government.


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The purpose of this web site is to provide information and related links that: 1) define environmental risk and the EPA concept of a risk assessment process, 2) show how the process is used in the OSWER regulatory programs and 3) provide additional links to EPA's web sites for information on policy, guidance, and research, and specific chemicals relative to risk assessment.

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OSWER Home | Waste and Cleanup Risk Assessment Home


Richard Mattick,
(202) 566-1926
Office of Solid Waste Emergency Response (OSWER)
USEPA Headquarters
Ariel Rios Building
1200 Pennsylvania Ave, N.W.
Mail Code: 5103T
Washington, D.C. 20460

Frequently Occurring Contaminants Related to Risk Assessments

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