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 This website is no longer updated and links to external websites and some internal pages may not work.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 »

Chapter Seven of the SW-846 Compendium: Introductory and Regulatory Definitions Pertaining to Hazardous Waste Characteristics

This chapter addresses procedures for required "method-defined parameters" (MDPs), where the analytical result is wholly dependent on the process used to make the measurement. Examples include the use of the toxicity characteristic leaching procedure (TCLP) to prepare a leachate, and the flash point, pH, paint filter liquids, and corrosivity tests. 

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