STP886

    Model Assumptions and Rationale Behind the Development of EP-III

    Published: Jan 1985


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    Abstract

    As part of the efforts of the U.S. Environmental Protection Agency (EPA) to expand the Extraction Procedure (EP) Toxicity Characteristic (40 CFR 261.24) to include additional organic toxicants, the Oak Ridge National Laboratory (ORNL) is developing for EPA a leaching procedure, known as EP-III, for use in determining the leaching potential of organic constituents from solid wastes. The intent is to develop a test method that would accurately and reproducibly model leachate production from industrial waste's codisposed with municipal refuse.

    In addition to accurately modeling the mobility of organic constituents, other objectives of the test are that it be relatively inexpensive to conduct in terms of time, equipment, and personnel; that it be compatible with biological toxicity tests; and that it also model the mobility of inorganic species.

    This paper discusses in detail the model, assumptions, and rationale used in developing the EP-III. Emphasis is placed on a discussion of the possible shortcomings of the protocol outlined in the current EP and the approach taken to develop a second generation mobility procedure that eliminates the short-comings. The data generated by ORNL in support of this program are discussed to illustrate the rationale behind selection of a draft leaching procedure. Conclusions are drawn as to which laboratory extraction procedure appears to best approximate the lysimeter leachate values. In light of these conclusions, selection of a draft EP-III is described.

    Keywords:

    leaching, mobility, landfill, sanitary landfill, RCRA, leaching methods, hazardous wastes


    Author Information:

    Kimmell, TA
    Environmental scientist and manager, Methods Program, Office of Solid Waste, U.S. Environmental Protection Agency, Washington, DC

    Friedman, D
    Environmental scientist and manager, Methods Program, Office of Solid Waste, U.S. Environmental Protection Agency, Washington, DC


    Paper ID: STP36362S

    Committee/Subcommittee: D34.07

    DOI: 10.1520/STP36362S


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