SITE-WIDE REMEDIAL INVESTIGATION
Langan has implemented a comprehensive Remedial Investigation at this 250-acre active manufacturing facility to address and close numerous former waste treatment and disposal units, including a wastewater and sludge surface impoundment, an industrial waste landfill and a multiple lagoon and sludge disposal system. Initial remedial evaluations assessed the feasibility of consolidating wastes from the impoundment and lagoon system within the landfill or other sludge disposal areas. The impact of remedial activities at the active lagoon system, and an assessment of current operational discharges and potential system upgrades is of extreme importance to plant management. Langan is also characterizing groundwater conditions in the area of these waste disposal units. Detailed hydraulic analysis were performed to determine the interaction of tidal surface water bodies, shallow groundwater, deep groundwater and site hydrologic features. This has included piezometer installation, groundwater monitoring, surface water elevation measurements, aquifer testing and detailed logging of soil test borings. The results of the hydrogeologic assessment were used to evaluate the effectiveness of the existing groundwater monitoring system and to support development of a Groundwater Protection Program Plan for the ongoing NJPDES-DGW permit for the lagoons. This has involved evaluation of appropriate groundwater/surface water quality standards and compliance points for the permit. The results of the hydrogeologic assessment support the ongoing Remedial Investigation of Groundwater and Surface Water at the site.