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Record of Decision System (RODS)



Address:  1MI N OF I-94 W OF CSAH 40 
City & State:  LAGRAND TOWNSHIP  MN  56308
County:  DOUGLAS
EPA ID:  MND981090483
EPA Region:  05
NPL Status:  Deleted from the Final NPL
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R05-92/211
ROD Date:  09/30/1992
Operable Unit(s):  01
Media:  Soil, Debris, Ground Water
Contaminant:  Organics, Metals
Abstract:  SITE HISTORY/DESCRIPTION: The 80-acre La Grande Sanitary Landfill site is located in westcentral Douglas County, Minnesota, 5 miles west of the town of Alexandria and 3 miles south of the town of Garfield. The main fill area occupies 6 acres of a small, north-trending gully, which is surrounded by forest, steep uncultivated hills, and low lying wetlands. A sand and gravel water table exists under a portion of the site, and residents downgradient are using the aquifer for drinking water. From 1974 to 1984, the landfill was in operation and accepted mixed municipal solid waste and nonhazardous industrial wastes. In 1982, a state ground water investigation revealed the presence of low level organic compounds. The landfill was closed in 1984, and a final cover was installed in accordance with state regulations. Sampling during the RI revealed that only one contaminant, manganese, was found in high levels in the Old Shop Well onsite, which required action to reduce the potential risk of exposure. This ROD provides a final remedy for the site and addresses the onsite landfill and ground water. The primary contaminants of concern affecting the soil, debris, and ground water are organics and metals. PERFORMANCE STANDARDS OR GOALS: Chemical-specific ground water clean-up goals were not specified. Because of the low level risks posed by the site, treatment of onsite media is not considered necessary. INSTITUTIONAL CONTROLS: Institutional controls in the form of ground water use restrictions and possibly deed restrictions will be implemented.
Remedy:  SELECTED REMEDIAL ACTION: The selected remedial action for this site includes converting a gas monitoring well to a gas vent to control the accumulation of explosive gases; sealing off and abandoning the onsite Shop Well to ensure that it will not be used as a potable water source; stabilizing the west slope of the landfill, and placing a soil cover over the exposed landfill waste on the northwest corner; sloping and reconstructing the borrow pit area adjacent to the west slope to ensure long -term integrity of the existing cover system; conducting longterm monitoring of ground water and combustible gas; and implementing institutional controls, including deed and ground water use restrictions, and restricting site access. The estimated present worth cost for this remedial action is $501,000, which includes an annual O&M cost of $22,000 for 30 years.
Text:  View full-text ROD [ 37K ]
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