Stuyvesant Environmental Contracting Inc. (SECI) has been supporting our client, ARCADIS U.S. Inc. (Prime Contractor), with an extensive amount of engineering and construction planning work for the contaminated sediment processing to be conducted under the Phase I Removal Action for the Lower Passaic River Study Area in Newark, New Jersey. SECI is an affiliated North American company of Boskalis Dolman, based in the Netherlands. Phase I is targeting approximately 40,000 cubic yards (cy) with the main objective of this work to remove sediments impacted with 2,3,7,8-tetrachlorodibenzo-p-dioxin (2,3,7,8-TCDD), PCBs, mercury, PAH and other chemicals.

As part of this project, mechanical dredging will be conducted by a third party within a sheet pile wall enclosure to prevent downstream migration of resuspended sediments to the maximum extent practicable. A hydraulic pipeline will transport sediment slurry from the enclosure across to the north side of the river (submerged), then continuing to float along the shoreline for approximately one mile to the upland processing facility. After screening, sand separation, and thickening in the sediment processing facility SECI is designing, membrane filter presses will provide effective dewatering of the sediment slurry. Removed materials (debris, coarse solids, and filter cake) will then be transloaded in lined containers by truck to railcars for offsite transportation to either landfill for disposal or to an incinerator, according to the specific waste category.