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 This website is no longer updated and links to external websites and some internal pages may not work.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

SW-846 Test Method 1315: Mass Transfer Rates of Constituents in Monolithic or Compacted Granular Materials Using a Semi-Dynamic Tank Leaching Procedure

This method is one of four Leaching Environmental Assessment Framework (LEAF) methods. It is designed to provide the mass transfer rates (release rates) of inorganic analytes contained in a monolithic or compacted granular material, under diffusion-controlled release conditions, as a function of leaching time.

More information about the LEAF, including a detailed "How-To" Guide, can be found on the LEAF web page.

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