Superfund Record of Decision (EPA Region 5): New Brighton/Arden Hills, Ramsey County, MN. (Eighth remedial action), September 1992

Technical Report · Wed Sep 30 04:00:00 EDT 1992

OSTI ID:5776692

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.

• Research Organization: Environmental Protection Agency, Washington, DC (United States). Office of Emergency and Remedial Response
• OSTI ID: 5776692
• Report Number(s): PB-93-964131/XAB; EPA/ROD/R--05-92/210
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540250* -- Environment
Terrestrial-- Site Resource & Use Studies-- (1990-)
ACTIVATED CARBON
ADMINISTRATIVE PROCEDURES
ADSORBENTS
ALKYLATED AROMATICS
AROMATICS
BENZENE
CARBON
CHROMIUM
COMMERCIAL SECTOR
CONTROL
DECISIONS AND ORDERS
DEVELOPED COUNTRIES
DRINKING WATER
ELEMENTS
EXTRACTION
FILTRATION
GROUND WATER
HAZARDOUS MATERIALS
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INDUSTRIAL WASTES
LAND USE
LAWS
MANAGEMENT
MATERIALS
METALS
MINNESOTA
NATIONAL ORGANIZATIONS
NONMETALS
NORTH AMERICA
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHENOLS
POLLUTION CONTROL
POLLUTION LAWS
PROCESSING
PUMPING
REMEDIAL ACTION
RESIDENTIAL SECTOR
SEDIMENTS
SEPARATION PROCESSES
SOILS
TRACE AMOUNTS
TRANSITION ELEMENTS
US DOD
US EPA
US ORGANIZATIONS
US SUPERFUND
USA
WASTE DISPOSAL
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
WATER
WATER SUPPLY
WATER WELLS
WELLS
XYLENES