EPA’s Test Methods for Evaluating Solid Waste, Physical/Chemical Methods, also known as SW-846, is the Agency’s official compendium of methods for use in complying with Resource Conservation and Recovery Act (RCRA) regulations. SW-846 comprises over 200 analytical methods for sampling and analyzing waste and other matrices. Most methods are intended as guidance (i.e., nonregulatory or validated methods); others are method defined parameters (MDPs), which are required in the RCRA regulations for compliance purposes. (SW-846 currently contains 29 MDPs)
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The EPA says it recognizes that science advances rapidly and that new methods for evaluating solid waste are often faster, less costly, less complicated, and more sensitive than methods that have been in use for many years.