From approximately 1972 to 1985, this 12.5-acre facility operated to recondition 55-gallon drums that contained various types of residual wastes. Waste from the operations at the site consisted of ash and slag from the incinerator processes. Residual and caustic wastes were generated from the rinse processes to clean the drums. In addition, the NJDEP historical documents indicated that hundreds of drums containing paints, resins, ash, waste oil, and unknown contents were located throughout the site.
The site is approximately 12.5 acres, of which more than half is heavily wooded. While the subsurface is primarily sand, the geology was identified to contain layers of silts and clays where contaminants tended to collect. Contamination has been identified at depths exceeding 80 feet below grade. Since the site had accepted drums that potentially contained unknown residual wastes, evaluation and characterization for contaminants of concern while keeping costs to a minimum—has been a challenge. However, through the use of profiling and conventional sampling, both data collection and characterization have been achieved efficiently and cost effectively.
Site investigations included various types of subsurface techniques such as Membrane Interface Probe (MIP), direct-push, and conventional auger/ mud-rotary drilling to evaluate for various volatile organic, semi-volatile organic compounds, metals, PCBs, pesticides and numerous other chemical compounds such as dioxins/furans. Kleinfelder had developed detailed conceptual site investigation approach, a detailed site investigation workplan, and a comprehensive site-specific HASP and QAPP for the investigations.
The investigations were streamlined through the use of real-time investigation tools such as MIP and groundwater profiling techniques. Through these techniques, Kleinfelder was able to quickly characterize the 12.5-acre property and identify key zones at depth that contained contaminants of concern migrating beneath the site.
Winslow Township, New Jersey
New Jersey Department of Treasury