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.

Hazardous Waste

The Technical Support Document for the Hazardous Waste Delisting Risk Assessment Software (DRAS)

The Delisting Technical Support Document presents extensive information delineating all chemical release, exposure and risk assessment algorithms employed by the DRAS program.

The document consists of six chapters -- Introduction, Estimation of Chemical Releases and Media Concentrations, Exposure Scenario Selection, Quantitative Estimation of Risk, Uncertainty and References -- and an appendix, which is broken up into six parts --A-1, A-1b, A-2, A-3. A-4 and A-5.

You may need Adobe Reader to view files on this page. See EPA’s About PDF page to learn more.