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In 2016, based on the monitoring and Base Line Ecological Risk Assessment (BERA) results, EPA initiated optimization of the final remedy by evaluating the potential for reduction or elimination of the availability of the PCB and lead waste in the Westerly Wetlands portion of the site through a treatability study. An EPA contractor is currently reviewing historical documents and preparing a work plan to conduct the treatability study/pilot study. Depending on the results of the treatability study, the next step will include an evaluation of the treatment options currently available for making PCBs and lead less bioavailable in this specific type of wetland environment. If treatment is feasible, the tasks may include a focused feasibility study, applying the in-situ treatment and development of a revised long term monitoring plan. The entire process should run for about two years.



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