Hydrogeologic Controls on Leachate Migration

by Alan D. Jones, Prince George's County Dep of, Environmental Resources, Marlboro, MD, USA,
Robert Fletcher, Prince George's County Dep of, Environmental Resources, Marlboro, MD, USA,
Katherine A. Sheedy, Prince George's County Dep of, Environmental Resources, Marlboro, MD, USA,



Document Type: Proceeding Paper

Part of: Environmental Engineering

Abstract: The Brown Station Road Landfill is a municipal solid waste disposal site operated by Prince George's County, Maryland. The work described herein was conducted as part of a redesign of the landfill to increase capacity. The hydrogeologic investigation determined that the unlined landfill is having a local effect on groundwater quality in the shallow underlying aquifer. The contaminant migration potential is limited in the horizontal direction by the presence of a stream which is the discharge area for the shallow aquifer. Impact of this discharge on stream quality is a 4 ppm rise in chloride concentration. Migration is limited in the vertical direction by the presence of a confining bed below the shallow aquifer. As a result of the work, the landfill redesign included steepening final grade of the landfill to increase surface water runoff and reduce leachate generation within the fill. (Author abstract. )

Subject Headings: Landfills | Hydrogeology | Leachates | Aquifers | Waste disposal | Municipal wastes | Solid wastes | Solid mechanics | North America | Maryland | United States

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