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Page 2 of 2 <br /> <br />review/comment by approximately October 31, 2018. It will then take approximately six months to <br />collect and incorporate all comments and authorize publication of the official delisting notice. <br /> <br />EPA publishes a notice of its intention to delete the site from the National Priorities List in the Federal <br />Register and notifies the community of its availability for comment (30-day public comment period). <br />After the close of the comment period, EPA issues a Responsiveness Summary to address the public’s <br />comments. EPA then publishes a formal deletion notice in the Federal Register, requests concurrence <br />letters from the Army and MPCA, and places a final deletion report in the Information Repository for the <br />TCAAP site. EPA headquarters staff anticipates that federal delisting will be complete approximately 60 <br />days after publication of the notice (in or about June 2019). <br /> <br />Federal delisting (under CERCLA) will then be complete and the MPCA will begin delisting the site from <br />the Minnesota Permanent List of Priorities. MPCA staff will start the state delisting process as soon as <br />the MPCA has submitted its federal delisting concurrence letter to EPA. The MPCA publishes the <br />delisting notice in the State Register and provides for a 30-day public comment period. <br /> <br />Based on the foregoing, the County anticipates that federal and Minnesota delisting of TCAAP soil will be <br />complete in the fall of 2019. <br /> <br />Is the County able to begin grading and infrastructure work prior to formal site delisting by the EPA <br />and MPCA? <br />Yes. There is no need to complete the federal or Minnesota Superfund delisting process before work <br />starts on the site grading and infrastructure. The EPA and MPCA have already determined that land use <br />is unrestricted throughout the 427 acres. The County will prepare and submit a Contingency Plan and <br />Response Action Plan to MPCA for review/approval before starting work. Those documents will address <br />known impacts (e.g., residual soil impacts at former Bldg. 502 and Bldg. 103, and shallow impacted <br />groundwater) and any unexpected environmental impacts encountered during the work.