Hydrogeologic Investigations at a Superfund Site in Wisconsin

by Jey K. Jeyapalan, Univ of Wisconsin, Madison, WI, USA,
Joe Winch, Univ of Wisconsin, Madison, WI, USA,
Wesley S. Ethiyajeevakaruna, Univ of Wisconsin, Madison, WI, USA,

Document Type: Proceeding Paper

Part of: Geotechnical Practice for Waste Disposal '87


An estimated 10,000 drums of volatile organic wastes from a nearby manufacturing plant were dumped at a landfill site in southern Wisconsin. Chemicals released from these drums have contaminated several private wells within a 1500 feet radius. Although the chemicals were dumped two decades ago, they are still found at high concentrations in all water quality testing done at the private wells. A hydrogeologic investigation was carried out to assess the damage to the groundwater supply. The USGS groundwater flow model 'MODFLOW' was used to develop new three-dimensional transient groundwater flow models. These groundwater flow models were then used to develop a contaminant migration model. The computer simulations incorporated data on the hydrogeologic history of the site over the last twenty years, and the results compared well with the field observations of head distribution and contaminant movement. The details of this case history are presented in this paper.

Subject Headings: Site investigation | Three-dimensional flow | Transient flow | Three-dimensional models | Hydrogeology | Waste sites | Groundwater pollution | Hydrologic models | Wisconsin | United States

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