Superfund Information Systems: Site Profile

Superfund Site:

NCR CORP. (MILLSBORO PLANT)
MILLSBORO, DE

Cleanup Progress

On this page:

Cleaning up Superfund sites is a complex, multi-phase process. Learn more:

Site Milestones

Milestone Date(s)
Initial Assessment Completed 09/01/1984
Proposed to the National Priorities List 04/10/1985
Finalized on the National Priorities List 07/22/1987
Remedial Investigation Started 03/10/1988
Final Remedy Selected 08/12/1991
Final Remedial Action Started 09/16/1994
Construction Completed 09/27/1996
Deleted from National Priorities List Not Yet Achieved
Most Recent Five-Year Review 06/25/2020
Site Ready for Reuse and Redevelopment 06/26/2006

Top of Page


Cleanup Schedule by Operable Unit

During cleanup, a site can be divided into a number of distinct areas depending on its complexity. These areas, called operable units (OUs), may address geographic areas, specific problems, or areas where a specific action is required. Examples of typical operable units include construction of a groundwater pump and treatment system or construction of a cap over a landfill.

Milestone OU Start Date Completion Date OU ID
Consent Decree (EPA Performed) OU 00 - SITEWIDE 02/28/2002 00
Consent Decree (EPA Performed) OU 00 - SITEWIDE 05/06/2008 00
Unilateral Administrative Order (EPA Performed) OU 00 - SITEWIDE 03/31/1992 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 03/31/2000 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 06/28/2005 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 07/01/2010 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 06/30/2015 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 06/25/2020 00
Combined Remedial Investigation/Feasibility Study (State Oversight) OU 01 - OU01 03/10/1988 08/12/1991 01
Record of Decision (EPA Performed) OU 01 - OU01 08/12/1991 01
Explanation of Significant Differences (EPA Performed) OU 01 - OU01 03/27/1996 01
Explanation of Significant Differences (EPA Performed) OU 01 - OU01 09/29/1998 01
Explanation of Significant Differences (EPA Performed) OU 01 - OU01 09/27/2016 01
Remedial Design (PRP Performed, EPA Oversight) OU 01 - OU01 08/04/1992 09/16/1994* 01
Remedial Design (PRP Performed, EPA Oversight) OU 01 - OU01 07/26/1994* 04/10/1996 01
Remedial Action (PRP Performed, EPA Oversight) OU 01 - OU01 09/16/1994 09/21/1995* 01
Remedial Action (PRP Performed, EPA Oversight) OU 01 - OU01 04/10/1996* 09/10/1997 01
Long-Term Response Action (PRP Performed, EPA Oversight) OU 01 - OU01 09/10/1997 Estimated Aug - Oct 2020 01

*NOTE: This date may not reflect the actual start or actual completion of the milestone. Either the lead for this activity changed, the project was phased, or the project did not fit the normal definitions of activities tracked in this table.

NOTE: Dates and estimated dates will not display for all milestones. Estimated dates only display for milestones planned within the next three fiscal years. Estimated dates and start dates will not display for the following enforcement milestones: Administrative Order of Consent, Consent Decree and Unilateral Administrative Order. Start dates will not display for the following document milestones: Five-Year Review, Record of Decision, Record of Decision Amendment, Explanation of Significant Differences and Partial NPL Deletion.

DISCLAIMER: The data on this page are derived from the Superfund Enterprise Management System and are solely for informational purposes. The data cannot be relied upon to create any substantive or procedural rights or requirements enforceable by any party in litigation with any member of the public, states, tribes, the United States or any federal agency. EPA reserves the right to change these data at any time without public notice.

Top of Page