EPA Science Inventory

ENVIRONMENTAL MONITORING OF REMEDIAL DREDGING AT THE NEW BEDFORD HARBOR, MA, SUPERFUND SITE

Citation:

Bergen, B J., W G. Nelson, J. Mackay, D. Dickerson, AND S. JAYARAMAN. ENVIRONMENTAL MONITORING OF REMEDIAL DREDGING AT THE NEW BEDFORD HARBOR, MA, SUPERFUND SITE. ENVIRONMENTAL MONITORING AND ASSESSMENT. Springer, New York, NY, 111:257-275, (2005).

Description:

New Bedford Harbor (NBH), MA, is a Superfund site because of high polychlorinated biphenyl (PCB) concentrations in the sediment. From April 1994 to September 1995, a remedial dredging operation (termed the 'Hot Spot') removed the most contaminated sediments (PCB concentrations greater than 4000?g/g) from the upper harbor. During remediation, a monitoring program assessed the potential environmental impacts to NBH and adjacent Buzzards Bay. The monitoring program was developed with input from federal, state, and local authorities. Site-specific decision criteria were established to assess net PCB transport, water column toxicity, and PCB bioaccumulation in blue and ribbed mussels (Mytilus edulis and Geukensia demissa, respectively). The remediation was completed without exceeding PCB net transport or acute toxicity effects specified in the decision criteria. In addition, PCB bioaccumulation in mussels during this time period was not significantly greater than pre- or post-operational measurements. The results indicated that approximately 14000 cubic yards of highly PCB contaminated sediment were permanently removed with minimal environmental effects. The lessons learned during this operation, as well as previous pilot studies at the site, will be used to make full-scale remedial efforts in NBH more efficient and environmentally protective.

Purpose/Objective:

To assess the potential environmental impacts to New Bedford Harbor and adjacent Buzzards Bay from remedial dredging

Record Details:

Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Start Date: 12/01/2005
Completion Date: 12/01/2005
Record Last Revised: 08/07/2006
Record Created: 12/08/2004
Record Released: 12/08/2004
OMB Category: Other
Record ID: 111623

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL HEALTH AND ENVIRONMENTAL EFFECTS RESEARCH LAB

ATLANTIC ECOLOGY DIVISION

ECOSYSTEM ANALYSIS AND SIMULATION BRANCH