Remedial Design Completed for Parkview Well OU1, Parkview Well Superfund Site, Grand Island, Nebraska
The U.S. Environmental Protection Agency (EPA) has completed a Remedial Design for Parkview Well Operable Unit 1 (OU1). The Remedial Design further refines the work outlined in the Record of Decision for OU1 that is needed to implement the Remedial Action. The Remedial Action is necessary to address ground water contaminated by hazardous substances in the aquifer migrating from the property at 3304 Engleman Road South (Source Area) in Grand Island, Nebraska. The plume contains chlorinated solvents exceeding Safe Drinking Water Act maximum contaminant levels (MCL) and extends into the Parkview subdivision.
The Remedial Action will help to restore contaminated ground water at OU1 to its beneficial uses by treating the water. OU1 addresses private and municipal wells within the ground water plume and the eastern portion of the ground water plume near the Parkview subdivision.
The Parkview Well site (Site) consists of an aquifer contaminated with industrial chemicals, primarily chlorinated volatile organics. Two ground water contaminant plumes, the Northern Plume with a
source area on the CNH America facility, and the Southern Plume with a source area at the Source Area, have been identified in the southwestern portion of Grand Island. CNH America, with oversight by the Nebraska Department of Environmental Quality, is addressing onsite soil and ground water contamination of the Northern Plume. Ground water migrating east from the property boundary of the CNH America facility does not exceed cleanup levels.
Contamination at the Site was discovered in 1999 during routine public water supply sampling by the Nebraska Department of Health. Contamination was present in Parkview Well #3, one of Grand Island's water supply wells. This well has since been taken out of service. The ground water contamination extends approximately 3.5 miles from the southern plume Source Area into and beyond the Parkview subdivision.
The Site has been separated into two Operable Units (OUs). OU1 is the Interim Remedial Action that addresses ground water contamination within and near the Parkview Subdivision, and protects private and municipal wells impacted or threatened by the ground water contamination above cleanup levels. OU2 is the site-wide final Remedial Action that includes the southern plume Source Area and remaining ground water contamination.
The highest soil contamination at the Source Area has already been excavated during a removal action for OU2. The remaining soils and ground water near and downgradient of the Source Area will be addressed by a Remedial Design and Remedial Action for OU2.
In July 2006, EPA presented a Proposed Plan for OU1 and held a public comment period for the plan. EPA prepared a Responsiveness Summary to respond to public comments.
In September 2006, EPA prepared a Record of Decision for OU1. A brief summary of information contained in the Record of Decision is presented below.
REMEDIAL ACTION BASED ON THE RECORD OF DECISION
Cleanup/construction activities outlined in the Remedial Design and the Record of Decision include the following actions:
- Contaminated ground water will be treated through extraction, air stripping, and discharge of treated water to the storm sewer system and beneficially reused in lake level stabilization.
- Monitoring will be conducted to evaluate the performance of the remedy.
- Alternate water supplies such as whole-house treatment will be provided to those with an existing domestic well used as a primary drinking water source with tetrachloroethylene (PCE) above the MCL. A connection to an existing water main will be provided to (1) those currently on whole-house treatment within the plume and with access to an existing water main or (2) any homes newly identified with PCE above the MCL with access to an existing water main. Note - Although EPA will provide alternate water supplies (whole-house treatment or water main connection), water district assessment fees will not be reimbursed for connections made to the existing water mains.
- Institutional controls, such as ground water-use controls, will be placed within and/or near the area of ground water contamination.
The Record of Decision and other site-related documents provide details of the nature and extent of contamination and the work that has been completed at the Site. These documents are part of the Administrative Record and are available at the following locations during regular business hours:
Edith Abbott Memorial Library
211 N. Washington
Grand Island, Nebraska
EPA Region 7
901 N. 5th Street
Kansas City, Kansas
If you have questions or need additional information, please contact:
Community Involvement Coordinator
EPA, Region 7
Office of Public Affairs
901 North 5th Street
Kansas City, KS 66101