NCR Corporation (Millsboro Plant)
EPA ID: DED043958388
Congressional District: 1st
Other Names: M&T Bank
First Freedom Center
Allfirst Financial Cente
Last Updated: December 2012
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On This Page
- EPA completed the third Five Year Review of the Site in 2010 and found that the cleanup is still protective of human health and the environment.
- EPA has been overseeing the cleanup of groundwater contaminated with the solvent trichloroethylene (TCE) at the site. Actions taken to address contaminated groundwater have included 1) groundwater extraction followed by onsite treatment of the recovered groundwater with an air stripper, 2) air sparging/vapor extraction and 3) in situ reductive dechlorination.
- These actions have substantially reduce TCE concentrations in groundwater at the site.
- Sampling has found that downgradient domestic wells and Iron Branch Creek are not adversely impacted by the site.
- The NCR Corporation manufactured cash registers from 1967 to 1975 and electronic equipment from 1975 to 1980 on a portion of this 140-acre site.
- TCE, used for degreasing operations, was stored in a tank outside the manufacturing building. Also, waste suspensions from the plating operation were discharged to on-site lagoons. The chromium-bearing sludge that accumulated in the lagoons was later disposed of in a pit on the property.
- After manufacturing operations were discontinued, First Omni Bank, National Association of Maryland, purchased the operating portion of the property from NCR in 1981.
- In July 2003, First Omni Bank merged with Manufacturers and Traders Trust Company.
- This site was proposed to the National Priorities List in1985 and formally added to the list in1987.
NPL Listing History
- In 1981, NCR excavated chromium-bearing sludge from a bentonite-lined pit. Toxic materials were drained and removed from two concrete-lined storage lagoons and 28 groundwater monitoring wells were installed.
- In 1988, NCR entered into a Consent Order with the State of Delaware which required interim remedial measures to address TCE-contaminated groundwater in the Phase I Area of the site. These measures included installation and operation of a groundwater recovery well and onsite treatment of the recovered groundwater with an air stripper.
- In 1991, EPA issued a Record of Decision (ROD) selecting a remedy which included additional groundwater recovery wells in the Phase I Area, emission controls for the air stripper if necessary, investigation of groundwater in the Phase II Area and groundwater recovery wells in the Phase II Area if necessary. In March of 1992, EPA issued a Unilateral Administrative Order requiring NCR and Allfirst Financial Center to design, construct, operate, and maintain the remedy selected in the 1991 ROD.
- Construction of the remedy selected in the 1991 ROD for the Phase I Area was completed in November 1995 and included an additional recovery well, emission controls for the air stripper and a sub-surface infiltration gallery for treated groundwater.
- The ROD was subsequently modified with two Explanation of Significant Differences (ESD). The first ESD selected air sparging/soil vapor extraction (AS/SVE) as the remedy for groundwater in the Phase II Area of the site. Construction for the Phase II Area remedy was completed in September 1996. The AS/SVE system in the Phase II Area operated until 2001 and substantially reduced contaminant levels in groundwater.
- The second ESD selected AS/SVE to enhance restoration of contaminated groundwater in the Phase I Area. An AS/SVE system subsequently operated in the Phase I Area from 1999 to 2007, further reducing contaminant levels in groundwater in the subject area.
- From 2003 through 2008, in situ reductive dechlorination treatment was also used to further reduced concentrations of groundwater contaminants at the site.
- Groundwater recovery and onsite treatment of recovered groundwater continues in the Phase I Area of the site at this time.
- The groundwater is contaminated with TCE. No contaminants levels of concern have been found in domestic supply wells. People who come into direct contact with or ingest contaminated groundwater may be at risk.
- Contaminant descriptions and risk factors are available from the Agency for Toxic Substances and Disease Registry, an arm of the CDC.
- To search an on-line database of all documents and reports on the NCR Corporation (Millsboro Plant) site, go to EPA’s Administrative Record Database.
- All documents and reports can also be reviewed in person at these locations:
Town Office Building
322 Wilson Highway
Millsboro, DE 19966
U.S. EPA Region 3 NPL Public Docket
c/o U.S. EPA Region 3 Library
1650 Arch Street, 2nd floor (3PM52)
Philadelphia, PA 19103-2029
215-814-5364 or 215-814-5254
- Some of the site’s key documents of interest are accessible below.
Record of Decision
Five Year Review - June 2005 (PDF) (36 pages, 2.09MB)
- Submit a FOIA Request
Get instructions on how to submit a FOIA request. $Fee$ for requests over 100 pages.
- Site Progress Profile — a quick reference sheet, linking to EPA's Headquarters.
- Federal Register
9/23/2009: National Priorities List, Proposed Rule No. 51 (74 FR 48504)
- Press Releases
9/23/2009: Millsboro TCE Site Proposed for Superfund List
9/23/2009: EPA Adds 11 Hazardous Waste Sites to Superfund's National Priorities List / EPA Also Proposes to Add 10 Additional Sites
- This site currently does not meet the criteria for Site-wide Ready for Anticipated Use; however parts of the site may be suitable for reuse.
- Want more information about how to reuse a Superfund site?