Superfund Site: NEW CASTLE SPILL

Superfund Site Profile


The New Castle Spill Site, located in New Castle County, Delaware, is a six-acre site used for many years by the Witco Chemical Company (Witco) to process materials used in the production of plastic foam.. The site is no longer active. Witco stored drums containing pre-polymer feedstocks and spent solvents on the southern boundary of the property adjacent to the New Castle Board of Water and Light (NCBW&L) property. In 1977, employees of NCBW&L noticed dead grass near the drum storage area, apparently the result of chemical spills on the Witco property. DNREC then directed the NCBW&L to pump the shallow contaminated aquifer and to discharge the water to the nearby wetlands. TRIS, tris-chloropropyl phosphate, a flame retardant that can be related back to Witco's activities, was detected in soils near the drum storage area and in the shallow ground water beneath the site. VOCs, polychlorinated biphenyls (PCBs), creosote, and phthalates from plastics production were also found in onsite soils. The area surrounding the site is industrial and residential. Approximately 5,500 people live within three miles of the site. The shallow aquifer used by the NCBW&L to provide a public water supply, was taken out of service in 1978.