Deepwater, New Jersey
The DuPont site is a Formerly Utilized Sites Remedial Action Program (FUSRAP) site that was used from 1942 to 1947 to process and refine uranium for the Manhattan Engineering District project. The site is currently home to an operational chemical facility owned by The Chemours Company. FUSRAP contaminants of concern (COCs) include U-234, U-235, U-238, Th-230, Ra-226; however, those COCs are comingled materials with chemicals, including tetraethyl lead, BTEX, VOCs, SVOCs, heavy metals, and pesticides.
As the self-performing prime contractor, Sevenson’s scope of work includes the handling and excavation of radiologically contaminated soil and debris; sheet pile installation; T&D of contaminated soils and debris via railcar; and operation of an on-site rad lab. Sevenson identified and rectified deficiencies of the on-site 85-GPM CWTP (broken piping, spent vessel media, and rusted vessel coatings). Corrective actions included installing heat tracing/insulation to protect components during winter season operations; replacing pumps, flow meters, and chemical metering pumps; and updating PLC logic and software. With the upgraded 120-GPM CWTP, staffed by an N-4-licensed plant operator, Sevenson has processed >22.2M gallons of wastewater while collecting 724 CWTP samples.