Liners
Brownfield Redevelopment
The scientists and engineers of Najarian Associates were retained by a major residential developer to conduct environmental studies in support of the redevelopment of a former brownfield site in Jersey City, New Jersey. Initially, these studies consisted of a comprehensive monitoring program designed to: (a) determine the contaminants of concern at the site; and (b) assess the spatial extent (both horizontally and vertically) of such contaminants. Najarian Associates' investigations were bolstered by the developer's efforts to ensure that the site would be rendered safe and in compliance with the most stringent residential standards. The sampling program revealed that Hexavalent Chromium (Cr6+) was a key contaminant of concern and that it was confined to certain portions of the site.
| A team of scientists and professionals of the developer, in cooperation with the Jersey City Redevelopment Agency (JCRA), has generated a meticulous plan for remediating the site based on the extensive sampling database. The proposed remedial work plan has been approved by NJDEP and implemented. The plan entailed the removal of all soils that exceed the residential standards for Cr6+ and are situated above the water table. These tainted soils were disposed at an approved, off-site landfill. The plan also called for the installation of a slurry wall along the boundary of the site to isolate the project from possible contaminant sources within the adjacent properties. In addition, certain portions of the site have a capillary break and liner installed to provide added protection from potential groundwater sources. Finally, the entire site will be capped with clean soil having a minimum thickness of one-and-one-half (1.5) feet. |
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The contractor work was supervised by the staff of Najarian Associates on behalf of the developer. Completion of this remedial plan netted the construction of a 380-unit townhouse development.
Professional Services
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