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U.S. EPA REGION 5
DAKOTA COUNTY
ROSEMOUNT

Congressional District # 02

UNIVERSITY OF MINNESOTA (ROSEMOUNT RESEARCH CENTER)

EPA ID# MND980613780
Last Updated: November, 2011

Site Description

The University of Minnesota Rosemount Research Center site is located in the city of Rosemount, in Dakota County, Minnesota, approximately 15 miles southeast of the Minneapolis/St. Paul metropolitan area.  The site covers approximately five-square miles and is owned by the university. The property is used primarily as an agricultural research station, although some light manufacturing and service companies are also present.  The site includes a burn pit area operated by the university and three disposal areas resulting from the operations of tenants, including: George's Used Equipment, Porter Electric and Machine Company, and U.S. Transformer.  Approximately 9,600 people use wells within three miles as a source of drinking water. 

Site Responsibility

This site is being addressed through state and potentially responsible parties' (PRP) actions.  The site is part of the United States Environmental Protection Agency's (EPA's) Enforcement Deferral Pilot Agreement with the Minnesota Pollution Control Agency (MPCA) and MPCA is the lead agency overseeing cleanup at the site. 

Threats and Contaminants

Soils were contaminated with polychlorinated biphenyls (PCBs), lead, and copper.  Groundwater was contaminated with volatile organic compounds (VOCs), primarily chloroform. 

Cleanup Progress

The University of Minnesota and the MPCA signed a response order by consent on May 30, 1985, under the Minnesota Superfund law. The record of decision (ROD), dated June 29, 1990, documents the selection of a groundwater pump and treatment system as the remedy for contaminated groundwater; offsite disposal of lead, copper, and PCB-contaminated soil that could not be economically separated from lead and copper contaminated soil; and onsite thermal desorption with fume incineration of other PCB-contaminated soil. 

In 1988, based on new toxicological information, the health-based drinking water guideline for chloroform was raised from 1.9 to 57 parts per billion (ppb). Since the concentration of chloroform in all residential wells was below 57 ppb, the drinking water advisories issued to 27 Rosemount residences were not necessary; however, the university chose to provide a community water supply with distribution lines to these residences. Construction began in 1989 and was completed in 1991. MPCA approved pump and treatment system shutdown in October 1991. 

In July and August 1990, the university disposed of 4,384 tons of lead/PCB-contaminated soil in Resource Conservation and Recovery Act (RCRA) and/or Toxic Substance Control Act (TSCA) landfills. Removal of high levels of copper was associated with the removal of this lead-contaminated soil. An additional 100 cubic yards of lead-contaminated soil was removed to an approved landfill in 1993. A total of approximately 7,000 cubic yards of PCB-contaminated soil was burned in the thermal destruction unit. Soil containing low levels of PCBs and ash from the incinerator were placed in an onsite landfill, which was capped and vegetated. All construction was completed in June 1996.   A second Five-Year Review was completed on June 21, 2002.  The second review stated the remedy remains protective of human health and the environment.  

A third Five-Year Review was completed in June 2007.  The third five-year review concluded that the remedy remains protective in the short-term, however in order for the remedy to be protective in the long-term, additional actions were needed.   In response, the University of Minnesota undertook a number of actions.  It conducted an evaluation of the site institutional controls (ICs).  Institutional controls are non-engineered instruments such as legal or administrative controls that help minimize the potential for exposure to contamination.  The university also established the boundaries of known disposal areas and completed a file search for potential additional disposal areas, completed a well survey of the site, and undertook several maintenance actions recommended by the five year review.

The next five-year review is scheduled to be completed in 2012.

Contacts

Remedial Project Manager, U.S. EPA
leah evison (evison.leah@epa.gov)
(312) 886-2064

Community Involvement Coordinator, U.S. EPA
dave novak
(312) 886-7478

Aliases

UNIVERSITY MINNESOTA (ROSEMOUNT RES CEN)
ROSEMOUNT RESEARCH CTR
UNIVERSITY OF MINNESOTA

 

Site Profile Information

This profile provides you with information on EPA's cleanup progress at this Superfund site.

 


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