Waste Management System; Testing and Monitoring Activities; Notice of Availability of Draft Update IVB of SW-846

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The Environmental Protection Agency (EPA or Agency) is providing notice of the availability of, and requests comment on, "Draft Update IVB" to the Third Edition of the methods manual, "Test Methods for Evaluating Solid Waste, Physical/Chemical Methods," EPA publication SW-846. SW-846 contains EPA-approved sampling and analysis methods for use under the Resource Conservation and Recovery Act (RCRA) Program. Draft Update IVB contains new and revised SW-846 methods. As part of Draft Update IVB, we are also providing references in SW-846 to four air methods that are, or may be in the future, used in the RCRA regulations.