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PCB transport and fate modeling at New Bedford Harbor, MA
Hayter, E., L. Burkhard, K. Gustavson, J. Smith, J. Gailani, Elainet Stanley, D. Lederer, AND E. Iorio. PCB transport and fate modeling at New Bedford Harbor, MA. U.S. Environmental Protection Agency, Washington, DC, 2017.
The U.S. Army Engineer New England District (NAE) and the U.S. Environmental Protection Agency (USEPA) Region 1 requested that the U.S. Army Engineer Research and Development Center (ERDC), Environmental Laboratory (EL) perform a numerical modeling study for the purpose of developing a PCB transport and fate model that will allow multi-decade evaluation of the selected post-remediation scenario in New Bedford Harbor (NBH). A detailed description of the modeling study (including a description of the numerical models used in this study) that was performed to accomplish these two tasks is given in this report.
The post-remediation scenario selected by USEPA was constructed in the LTFATE modeling system that was used to perform this modeling study as follows: a) The bathymetry in the NBH portion of the model domain was updated using the latest bathymetric survey provided by EPA; b) In the Upper harbor, the concentration of total PCBs in the bottom sediment in the subtidal and mudflat areas was set equal to 10 ppm; c) In the Outer harbor, the concentration of total PCBs in the bottom sediment was set equal to 1 ppm; d) The sediment PCB initial concentrations in the nonremediated areas of NBH was re-interpreted using the 2014 LTM PCB data provided by EPA; e) In the Lower Harbor, the PCB bed concentrations was set to 15 ppm in the areas where dredging has been performed and 8 ppm everywhere else; f) The concentration of total PCBs in the lower harbor CAD cell (LHCC) capping material was set equal to 1 ppm.
Record Details:Record Type: DOCUMENT (PUBLISHED REPORT/REPORT)
Organization:U.S. ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL HEALTH AND ENVIRONMENTAL EFFECTS RESEARCH LABORATORY
MID-CONTINENT ECOLOGY DIVISION