You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.


    Design of Fate and Transport Modeling for US EPA Risk Assessments

    Published: 0

      Format Pages Price  
    PDF (512K) 18 $25   ADD TO CART
    Complete Source PDF (8.0M) 415 $112   ADD TO CART


    This paper outlines the design of a comprehensive 3-dimensional ground water fate and transport model for US EPA risk assessments of a major federal facility. This fate and transport modeling and risk assessment effort has saved the U.S. taxpayer $250M in remediation costs. The model estimates the concentrations of key constituents at human receptors to evaluate the human health risks associated with site wide remedial designs of various operable units (OUs). This model accounts for the infiltration and mixing of contaminated surface runoff in a seasonal stream and subsequent infiltration into the regional aquifer, transport through an unsaturated glacial till and aquifer zones, movement of contaminants released by perched water and residual (remediated) areas, and transport through the saturated zone. The model identifies the OUs that contribute the greatest risk to a receptor, directs data collection and analysis efforts for other OUs, and establishes preliminary remediation goals (PRGs) and waste acceptance criteria (WACs) for various engineered barriers. The associated carcinogenic and noncarcinogenic risks to human health at the 10-6 incremental lifetime cancer risk determine these PRGs and WACs.


    Fate and transport, radionuclides, remediation goals, waste acceptance criteria, risk assessments, unsaturated and saturated zones, ground water modeling, engineered barriers, and disposal cells

    Author Information:

    McNulty, EG
    Manager, IT Corporation, Cincinnati, Ohio

    Mossbarger, WA
    President, FMSM Engineers, Inc., Lexington, Kentucky

    Versluis, WS
    Manager, Cincinnati, Ohio

    Committee/Subcommittee: D18.21

    DOI: 10.1520/STP38390S