Record Display for the EPA National Library Catalog
RECORD NUMBER: 847 OF 1029
|OLS Field Name||OLS Field Data|
|Main Title||Superfund record of decision : New Brighton/Arden Hills, MN : eigth remedial action - subsequent to follow.|
|CORP Author||United States. Environmental Protection Agency.|
|Publisher||U.S. Environmental Protection Agency, Office of Emergency and Remedial Response,|
|Subjects||Hazardous waste sites--Minnesota.|
|Additional Subjects||Superfund ; Hazardous materials ; Waste disposal ; Pollution control ; Ground water ; Industrial wastes ; Ammunition ; Volatile organic compounds ; Heavy metals ; Explosives ; Water wells ; Organic compounds ; Benzene ; Soils properties ; Xylenes ; Waste treatment ; Activated carbon process ; Precipitation(Chemistry) ; Filtration ; Pumping ; Monitoring ; Record of Decision ; Eighth remedial action ; Ramsey County(Minnesota) ; New Brighton(Minnesota) ; Vapor extraction|
|Collation||144 pages ; 28 cm|
The 25-square-mile New Brighton/Arden Hills site includes the 4-square-mile. Twin Cities Army Ammunition Plant (TCAAP) in Ramsey County, Minnesota. Land use in the area is predominantly residential with commercial and industrial sectors. In 1981, state investigations of municipal and private drinking water wells in and around TCAAP identified contamination of ground water, onsite soil, sediment, and surface water by VOCs, other organics, and metals. Past removal actions and seven previous RODs, signed from 1983 to 1989, addressed interim remedial actions conducted by the Army and Alliant Techsystems and provided for the establishment of alternate drinking water supplies. The ROD addresses remediation of the south plume of offsite contaminated ground water, as OU3. The primary contaminants of concern affecting the ground water are VOCs, including benzene, TCE, and xylenes; other organics, including phenols; and metals, including chromium and lead. The selected remedial action for the site includes pumping and offsite treatment of contaminated ground water at the leading edge of the south plume using precipitation and filtration to remove inorganic solids and a pressurized granular activated carbon system to remove VOCs; and discharging the treated ground water offsite to the potable water supply.
"09/30/92." "PB93-964131." "EPA/ROD/R05-92/210." "Office of Emergency and Remedial Response." Microfiche.