Superfund Information Systems: Site Profile

Superfund Site:

COAKLEY LANDFILL
NORTH HAMPTON, NH

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 07/01/1983
Proposed to the National Priorities List 10/15/1984
Finalized on the National Priorities List 06/10/1986
Remedial Investigation Started 08/29/1985
Remedy Selected 06/28/1990
Final Remedy Selected 09/30/1994
Remedial Action Started 01/25/1996
Final Remedial Action Started 03/10/1999
Construction Completed 09/29/1999
Deleted from National Priorities List Not Yet Achieved
Most Recent Five-Year Review 09/26/2016
Site Ready for Reuse and Redevelopment 03/23/2011

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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
Consent Decree (EPA Performed) OU 00 - SITEWIDE 05/05/1992 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 09/25/2001 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 09/21/2006 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 09/22/2011 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 09/26/2016 00
Five-Year Review OU 00 - SITEWIDE Estimated Sep - Nov 2021 00
Consent Decree (EPA Performed) OU 01 - SOURCE 08/29/1995 01
Combined Remedial Investigation/Feasibility Study (State Performed) OU 01 - SOURCE 08/29/1985 06/28/1990 01
Record of Decision (EPA Performed) OU 01 - SOURCE 06/28/1990 01
Explanation of Significant Differences (EPA Performed) OU 01 - SOURCE 03/22/1991 01
Explanation of Significant Differences (EPA Performed) OU 01 - SOURCE 05/17/1996 01
Explanation of Significant Differences (EPA Performed) OU 01 - SOURCE 09/29/1999 01
Explanation of Significant Differences (EPA Performed) OU 01 - SOURCE 09/20/2007 01
Explanation of Significant Differences (EPA Performed) OU 01 - SOURCE 07/29/2009 01
Remedial Design (PRP Performed, EPA Oversight) OU 01 - SOURCE 06/19/1992 01/25/1996 01
Remedial Action (PRP Performed, EPA Oversight) OU 01 - SOURCE 01/25/1996 03/08/2000 01
Operation and Maintenance (PRP Performed, EPA Oversight) OU 01 - SOURCE 09/29/1999 01
Consent Decree (EPA Performed) OU 02 - OFFSITE GW 01/11/1999 02
Combined Remedial Investigation/Feasibility Study (EPA Performed) OU 02 - OFFSITE GW 09/27/1990 09/30/1994 02
Proposed Plan (PRP Performed, EPA Oversight) OU 02 - OFFSITE GW 04/01/2015 04/30/2015 02
Record of Decision (EPA Performed) OU 02 - OFFSITE GW 09/30/1994 02
Explanation of Significant Differences (EPA Performed) OU 02 - OFFSITE GW 09/20/2007 02
Explanation of Significant Differences (EPA Performed) OU 02 - OFFSITE GW 07/29/2009 02
Explanation of Significant Differences (EPA Performed) OU 02 - OFFSITE GW 08/04/2015 02
Remedial Design (PRP Performed, EPA Oversight) OU 02 - OFFSITE GW 10/23/1998 03/10/1999 02
Remedial Action (PRP Performed, EPA Oversight) OU 02 - OFFSITE GW 03/10/1999 03/08/2000 02
Long-Term Response Action (PRP Performed, EPA Oversight) OU 02 - OFFSITE GW 03/08/2000 02

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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