e.i. du pont de nemours & co., inc. (newport pigment plant landfill)

JAMES & WATER STS

The E.I DuPont, Newport site encompasses a pigment-manufacturing facility and two industrial landfills. The Christina River flows between the seven-acre North Landfill and the 15-acre South Landfill. From 1902 to 1929, Henrik Krebs built the plant and used it to manufacture a white zinc and barium-based pigment called Lithopone. In 1929, DuPont bought the plant. DuPont phased out Lithopone production and started making organic pigments, inorganic pigments, and other assorted products including chromium dioxide (a synthetic magnetic substance). As part of the plant’s operations, waste was disposed of in landfills which flowed into bordering wetlands and the Christina River. Wastes put in these landfills contained metals such as lead, cadmium, zinc, barium, mercury, and copper. Prior to Superfund laws, the State purchased a section of the South Landfill as part of a highway construction project. In 1984, Ciba-Geigy (now Ciba Specialty Chemicals) bought the pigment plant. DuPont retained the chromium dioxide manufacturing facility, which has since been shut down. There are public water supply wells within a three-mile radius of the site, however they have not been impacted by the site. The river that flows between the landfills is used for recreational purposes.

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