Superfund Site Profile
The 120-acre E.I. DuPont De Nemours & Co., Inc. (a.k.a. Newport Landfill) Site consists of:
- a paint pigment product facility (the BASF plant),
- a groundwater treatment plant,
- two capped, former industrial landfills separated by the Christina (known locally by some as the Christiana River),
- a solar array,
- a recreational park, and
- wetland areas and portions of the Christina River where Site-related contaminants migrated.
One part of the Site is in the town of Newport and another part is in unincorporated New Castle County, Delaware.
The Christina River, which is used for recreational purposes, flows between the seven-acre North Landfill and the 15-acre South Landfill.
From 1902 to 1929, the plant manufactured a white, zinc- and barium-based pigment called Lithopone.
In 1929, DuPont bought the plant. DuPont phased out Lithopone production and started making both organic and inorganic pigments and other assorted products, including chromium dioxide, a synthetic magnetic substance.
In 1984, Ciba-Geigy (now Ciba Specialty Chemicals) bought the pigment plant. DuPont retained the on-site chromium dioxide manufacturing facility, which has since been shut down.
in 2009, BASF Corporation bought and continues to operate the paint pigment manufacturing facility.
Decades of industrial waste disposal and plant operations resulted in contaminated soils, sediment, surface water and groundwater at the Site. Contaminants of concern (COCs) include chlorinated volatile organics and heavy metals, such as lead, cadmium, zinc, barium, mercury and copper.
To manage the cleanup, EPA divided the Site into seven separate areas called Operable Units (OUs).
- OU-1 addresses the ballpark, water line, phase I groundwater monitoring and includes the Ciba-Geigy Health & Safety Plan.
- OU-3 addresses the North Wetlands.
- OU-4 addresses the North Landfill, including the groundwater extraction and treatment.
- OU-5 addresses the South Wetlands.
- OU-6 addresses the South Landfill.
- OU-7 addresses portions of the Christina River.
- OU-8 addresses the DuPont (Holly Run) and Ciba-Geigy (now BASF Corporation) plants, phase II groundwater monitoring and groundwater extraction and treatment.
Note: OU-2 no longer exists. During the Remedial Investigation / Feasibility Study (RI/FS) phase of the cleanup, the Site was split into two operable units, and later recombined.