EPA Announces Explanation of Significant Differences and Public Availability Session for Parkview Well Superfund Site, Grand Island, Hall County, Nebraska
The U.S. Environmental Protection Agency (EPA) Region 7 has issued an Explanation of Significant Differences (ESD) for the Parkview Well Superfund Site in Grand Island, Nebraska. The ESD presents the reasoning for modifying the selected remedies identified in the Records of Decision (RODs) for Operable Units (OU) 1 and 2, originally published in September 2006 and 2007, respectively.
EXPLANATION OF SIGNIFICANT DIFFERENCES (ESD)
EPA proposes to modify three aspects of the RODs for OUs 1 and 2 under this ESD.
- EPA determined the action level for 1,1-Dichloroethane (1,1-DCA) was no longer protective of human health. Changing the cleanup level for 1,1-DCA in ground water in OUs 1 and 2 to a level that is protective of human health is the modification to the RODs and the primary subject of this ESD.
- The component language of the OU2 remedy will be modified to state that vapor intrusion (VI) from volatile organic compounds will be monitored until cleanup levels have been achieved or there is sufficient evidence to show that VI does not pose a significant health risk.
- The component language of the OU2 remedy will be modified to affirm use of local governmental institutional controls similar to the Grand Island Ground Water Control Area ordinances for the ground water plume area downgradient from the source area property, and similar to that provided for in the Interim OU1 ROD.
EPA plans to host a public availability session in July to inform the community of the ESD and give a general site update. Representatives will be available to listen to the concerns of the community, and answer questions local residents may have about the ESD and remediation process.
The Public Availability session will be held:
Thursday, July 7, 2011
100 East 1st Street
Grand Island, NE
EPA Region 7 is committed to providing reasonable accommodation to individuals with disabilities. If you require a reasonable accommodation to participate in the meeting, please notify the EPA Reasonable Accommodations Coordinator, Jonathan Cooper, 800-223-0425 or at firstname.lastname@example.org. Speech or hearing impaired individuals should email or call using the local relay service.
The Parkview Well Site is located in Grand Island, Nebraska. Two ground water contaminant plumes, the Northern Plume and the Southern Plume, have been identified at the Site.
The Northern Plume is being addressed by a responsible party [Case New Holland America (CNH)] through the Nebraska Remedial Action Plan Monitoring Act (RAPMA) program under the oversight of NDEQ; whereas, the Southern Plume has no viable responsible party and was placed on the National Priority List (NPL).
The NPL portion of the Site has been separated into two OUs: OU 1, the interim remedial action to address ground water contamination within and near the Parkview Subdivision, and to protect private and municipal wells impacted or threatened by the ground water contamination above cleanup levels; and OU 2, the site-wide final remedial action, which includes the Southern Plume source area and remaining ground water contamination.
ADMINISTRATIVE RECORDEPA encourages the community to review the Administrative Record which contains information about past cleanup activities and next steps. The Administrative Record is available during normal business hours at the following locations:
EPA Records Center
901 N. Fifth St.
Kansas City, Kan.
Edith Abbott Memorial Library
211 North Washington Street
Grand Island, NE
Questions or requests for information can be submitted to:
Community Involvement Coordinator
U.S. EPA Region 7
901 N. Fifth St.
Kansas City, KS 66101
Toll free: (800) 223-0425