Office of Research and Development Publications

PCB transport and fate modeling at New Bedford Harbor, MA

Citation:

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.

Impact/Purpose:

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.

Description:

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.

URLs/Downloads:

https://semspub.epa.gov/work/01/599091.pdf

Record Details:

Record Type: DOCUMENT (PUBLISHED REPORT/REPORT)
Product Published Date: 06/01/2017
Record Last Revised: 11/30/2018
OMB Category: Other
Record ID: 343474

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL HEALTH AND ENVIRONMENTAL EFFECTS RESEARCH LABORATORY

MID-CONTINENT ECOLOGY DIVISION