The 28-acre Hagen Farm site is located in Dane County, Wisconsin. A sand and gravel pit operated on site prior to the late 1950s. The gravel pit was then used for the disposal of waste materials from the late 1950s to 1966. Waste solvents and various organic materials, in addition to municipal wastes, were disposed of at the site. Facility operations contaminated groundwater with hazardous chemicals. Following construction of the site�s remedy, operation and maintenance activities and groundwater treatment and monitoring are ongoing.