Public Health Assessment for New Brighton/Arden Hills (a/k/a U.S. Army Twin Cities Ammunition Plant), New Brighton, Ramsey County, Minnesota, Region 5. CERCLIS No. MN7213820908

摘要

The New Brighton/Arden Hills National Priorities List (NPL) Site in Ramsey County, Minnesota, includes the 4-square-mile Twin Cities Army Ammunition Plant (TCAAP) and portions of seven nearby communities: New Brighton, St. Anthony, Arden Hills, Shoreview, Mounds View, Columbia Heights, and Minneapolis. In June 1981, the Minnesota Pollution Control Agency (MPCA) and the Minnesota Department of Health (MDH) discovered trichloroethylene (TCE) and other volatile organic compounds (VOCs) in municipal, mobile home park, and private well water in the vicinity of TCAAP. Initial analysis of TCAAP water supply wells revealed high concentrations of TCE (720 parts per billion ppb), 1,1,1-trichloroethane (360 ppb), 1,1-dichloroethane (130 ppb), and other VOCs. From its review of available data, ATSDR concludes that hazardous waste sites within TCAAP are public health hazards because people were exposed in the past to groundwater contaminants at concentrations that may cause adverse health effects.