EPA Provides Update On Activity At Olin Chemical Superfund Site

The EPA recently provided a community update on the Olin Chemical Superfund Site:

Community Update (February 2023)
Olin Chemical Superfund Site – Wilmington, Mass.

The 60 day public comment period for the draft Community Involvement Plan (CIP) ended on January 18th. EPA is evaluating the comments that were received and aims to finalize the CIP by early spring. EPA will also prepare a summary for the community of the comments that were received, together with EPA’s responses.

Under EPA oversight, Olin collected data in 2021 and 2022 to fill data gaps. This data will help to determine the depth and shape of bedrock, ultimately improving the effectiveness of future remediation. The data is currently being evaluated. Additional data collection will occur in late spring.

In May, Olin began a treatability study to evaluate options to treat Dense Aqueous Phase Liquid (or DAPL) and contaminated groundwater that will be pumped out of the aquifer. Last summer, Olin collected and prepared over 200 gallons of a DAPL/groundwater mixture to use in the study. Throughout the fall and winter, Olin has been testing various treatment methods on this mixture. EPA anticipates that the study will be completed this spring and will share the results with the community.

EPA and MassDEP continue negotiations with the Potentially Responsible Parties (PRPs) for the site, with the goal of reaching an agreement (a Consent Decree) to conduct or finance the cleanup actions selected in EPAs March 2021 Record of Decision.

For more information, please contact:
Charlotte Gray EPA Community Involvement Coordinator
(617) 918-1243

EPA Community Update

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