The Leaching Environmental Assessment Framework (LEAF) "How-To" Guide is a technical implementation guide that provides background on the LEAF methods, how to perform the methods, how to understand the test results and how the test results can be used to develop screening level assessments of constituent release or to develop more refined and accurate estimates of release when material is placed in a defined use or disposal scenario. The LEAF "How-To" Guide Appendices contain a comparison table of leaching methods used in the United States and the European Union, as well as full graphical and tabular leaching data for the case study.
The public comment period for the LEAF methods and "How-To" Guide closed on January 31, 2018. Although submissions will no longer be accepted, the EPA Docket can be viewed by searching for ID# EPA-HQ-OLEM-2017-0210. EPA reviewed all comments and published a Response to Comments document along with the final versions of the methods and “How-To” Guide.You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.