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Superfund Innovative Technology Evaluation (SITE)

Abstract

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Dredged Material Reclamation at the Jones Island Confined Disposal Facility
October 2003
Capsule

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The Jones Island Confined Disposal Facility (JICDF) located in Milwaukee Harbor Wisconsin, receives dredged materials from normal maintenance of Milwaukee´┐Żs waterways, and has done so for many years. Like many CDFs across the country, Jones Island faces the dilemma of steady inputs and no feasible alternative for expansion. The U.S. Army Corps of Engineers (USACE) in partnership with the Milwaukee Port Authority is exploring a large range of beneficial reuse options for the dredged material, from building and road fill, to landscape material.

Aged dredged material at Jones Island is heterogeneous in composition because it comes from waterway sources over a wide area over many years. Some dredged materials contain EPA listed wastes from industrial discharge, spills, and urban run-off in varying concentrations. Natural attenuation processes occur at differing rates due to random placement in the CDF and fluctuating oxygen and moisture levels and weathering impacts.

The first step taken on this project toward determining appropriate end use of the stored material was a detailed characterization across the CDF with samples taken at three depths and analyzed for PAHs, PCBs, DRO, and metals. The resultant map showed areas of high and low concentrations, and pinpointed areas of opportunity for testing. Concurrent treatability studies conducted by the USACE using crops and grasses determined that plants would survive in the material and degrade the contaminants. A corn hybrid had the highest degradation effect over the short test period.

Field plots were established on the CDF by excavating, mixing, and depositing soil in test cells. The test plots closely follow established protocols for plot size, sampling, and statistical design. The field demonstration involved four different treatment plots: hybrid corn, an indigenous willow, local grasses, and an unplanted control. The EPA Superfund Innovative Technology Evaluation Program (SITE) and USACE evaluated the demonstration for a two-year period (2001-2002). The effectiveness of the various plantings was monitored directly through soil sampling and indirectly with a variety of plant assessments.

This Innovative Technology Evaluation Report presents the results from sampling, monitoring, and modeling efforts to date.

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Steven Rock

Risk Mangement Research | Air and Climate Change Research | Water Research | Ecosystems Restoration Research | Land Risk Management Research | Technology: Sustainable Technologies Research, Environmental Technology Verification Program (ETV), and Technology Assessments

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