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Record of Decision System (RODS)

WAITE PARK WELLS

Abstract

Site Name:  WAITE PARK WELLS
Address:  253 N 5TH AVE 
City & State:  WAITE PARK  MN  56387
County:  STEARNS
 
EPA ID:  MND981002249
EPA Region:  05
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R05-94/272
ROD Date:  07/14/1994
Operable Unit(s):  02
 
Media:  soil, groundwater
 
Contaminant:  VOCs, polychlorinated biphenols (PCBs), lead, arsenic, Petroleum Products
 
Abstract:  Please note that the text in this document summarizes the Record of Decision for the purposes of facilitating searching and retrieving key text on the ROD. It is not the officially approved abstract drafted by the EPA Regional offices. Once EPA Headquarters receives the official abstract, this text will be replaced.

The Burlington Northern Car Shop is located in Waite Park, Minnesota. The site is bound to the north by the Electric Machinery (EM) site, to the south by Third Street, to the east by residential homes and to the west by the Sauk River. The city of Waite Park's municipal wells are located on the northeastern edge of the Site.

In the early 1880s, the Great Northern Railroad purchased the site in order to begin construction of wooden box cars. A box car construction and repair shop was built in 1894. A paint shop was built on the site in 1896. As time passed, other types of railroad equipment were built and/or repaired on the site. From 1973 to 1982 the steel shop was used to repair freight equipment. From 1950 to 1970, approximately 10,000 gallons of waste oil, paint, waste, and solvents were allegedly disposed of on-site.

In December 1984, volatile organic compounds (VOCs) were found in the City's municipal water supply wells. On January 28, 1985 the Minnesota Department of Health (MDH) informed the Minnesota Pollution Control Agency (MPCA) staff that the city was being advised to discontinue use of its water supply as soon as possible due to unacceptable levels of hazardous substances in its drinking water. In 1985, the MPCA Commissioner determined that an emergency existed with regard to the Waite Park water supply.

The RFRA requested both the BN and EM Responsible Parties to conduct a Remedial Investigation/Feasibility Study (RI/FS) and implement a Remedial Design/Response Action (RD/RA) Plan for a long-term water supply treatment system for the City. The RDFAs also requested BN and EM Responsible Parties to conduct an RI/FS and implement an RD/RA to address the contamination at their respective sites.

In September 1986, the MPCA staff approved the installation of an air stripping unit that would remove the contaminants from the City water supply. BN and EM Responsible Parties jointly implemented a water treatment system and the City wells were placed back into service in February 1988. This is the remedy currently in place, providing an acceptable long-term water supply to the City. The City, MDH, and the MPCA staff regularly monitor the water from the wells before and after treatment to ensure that the treatment system is functioning properly.

The EM site investigation has been completed and a Record of Decision (ROD) was issued on January 5, 1989. The remedy implemented at the EM site included the treatment of the shallow and deep aquifers by installing pump out wells, packed tower aeration treatment, and discharge of the treated water to the Sauk River. The MPCA staff will be conducting a Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) five-year review in 1995 to determine if the implemented remedy is adequately addressing the contamination at the EM site.
 
Remedy:  This ROD presents the selected remedial action for three operable units for the Site. The first operable unit, OU1, addresses the remediation of former lagoons where liquid and solid wastes were disposed of, resulting in soil contamination. The second operable unit, OU2, addresses the remediation of contaminated sandblast sands. The selected remedy for both operable units will be stabilization/solidification and on-site containment.

The third operable Unit, OU3, addresses shallow ground water contamination. No response action will be taken for OU3 at this time. However, a ROD amendment may be necessary for OU3 in the future, if it is determined by groundwater monitoring that groundwater remediation is necessary. Once the material in the lagoons has been removed the threat of additional contaminants to the groundwater will be removed. This may reduce the contaminant concentrations in the groundwater so that groundwater may not be necessary. A groundwater monitoring plan will be implemented after source removal is complete. If the concentrations of contaminants increase, remain the same, or do not meet regulatory levels specified in Table 2 to the ROD as a result of the source removal, the MPCA staff will evaluate whether groundwater remediation is necessary. The MPCA staff will make its determination on groundwater remediation within three years after removal of the source has occurred.
 
Text:  View full-text ROD [ 112K ]
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