Superfund Information Systems: Site Profile

Superfund Site:

DEWEY LOEFFEL LANDFILL
NASSAU, NY

Cleanup Progress

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Cleaning up Superfund sites is a complex, multi-phase process. Learn more:

Site Milestones

Milestone Date(s)
Initial Assessment Completed 01/01/1980
Proposed to the National Priorities List 03/04/2010
Finalized on the National Priorities List 03/10/2011
Remedial Investigation Started 04/13/2010
Remedy Selected Estimated Sep - Nov 2022
Remedial Action Started Not Yet Achieved
Construction Completed Not Yet Achieved
Deleted from National Priorities List Not Yet Achieved
Most Recent Five-Year Review Not Yet Achieved
Site Ready for Reuse and Redevelopment Not Yet Achieved

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Cleanup Schedule by Operable Unit

During cleanup, a site can be divided into a number of distinct areas depending on its complexity. These areas, called operable units (OUs), may address geographic areas, specific problems, or areas where a specific action is required. Examples of typical operable units include construction of a groundwater pump and treatment system or construction of a cap over a landfill.

Milestone OU Start Date Completion Date OU ID
Administrative Order of Consent (EPA Performed) OU 00 - SITEWIDE 04/10/2012 00
Removal (EPA Performed) OU 00 - SITEWIDE 09/13/2011 10/12/2012 00
Administrative Order of Consent (EPA Performed) OU 01 - GW- LANDFILL 09/30/2013 01
Combined Remedial Investigation/Feasibility Study (EPA Performed) OU 01 - GW- LANDFILL 04/13/2010 09/30/2013* 01
Combined Remedial Investigation/Feasibility Study (PRP Performed, EPA Oversight) OU 01 - GW- LANDFILL 09/30/2013* Estimated Sep - Nov 2022 01
Record of Decision OU 01 - GW- LANDFILL Estimated Sep - Nov 2022 01
Administrative Order of Consent (EPA Performed) OU 02 - SEDIMENTS 10/30/2013 02
Removal (PRP Performed, EPA Oversight) OU 02 - SEDIMENTS 10/10/2017 Estimated Sep - Nov 2020 02
Combined Remedial Investigation/Feasibility Study (PRP Performed, EPA Oversight) OU 02 - SEDIMENTS 10/30/2013 02
Combined Remedial Investigation/Feasibility Study OU 03 - TRIBUTARY T11A Estimated Dec 2020 - Feb 2021 03

*NOTE: This date may not reflect the actual start or actual completion of the milestone. Either the lead for this activity changed, the project was phased, or the project did not fit the normal definitions of activities tracked in this table.

NOTE: Dates and estimated dates will not display for all milestones. Estimated dates only display for milestones planned within the next three fiscal years. Estimated dates and start dates will not display for the following enforcement milestones: Administrative Order of Consent, Consent Decree and Unilateral Administrative Order. Start dates will not display for the following document milestones: Five-Year Review, Record of Decision, Record of Decision Amendment, Explanation of Significant Differences and Partial NPL Deletion.

DISCLAIMER: The data on this page are derived from the Superfund Enterprise Management System and are solely for informational purposes. The data cannot be relied upon to create any substantive or procedural rights or requirements enforceable by any party in litigation with any member of the public, states, tribes, the United States or any federal agency. EPA reserves the right to change these data at any time without public notice.

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