Superfund Information Systems: Site Profile

Superfund Site:

NYANZA CHEMICAL WASTE DUMP
ASHLAND, MA

Cleanup Progress

On this page:

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

Site-Wide Milestones

Milestone Date(s)
Preliminary Assessment/Site Investigation Completed 10/01/1982
Proposed to the National Priorities List 12/30/1982
Finalized on the National Priorities List 09/08/1983
Remedy Selected 09/04/1985
Remedial Action Started 12/31/1987
Construction Completed Not Yet Achieved
Deleted from National Priorities List Not Yet Achieved
Most Recent Five-Year Review 05/13/2014
Site Ready for Reuse and Redevelopment Not Yet Achieved

Top of Page


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
Removal OU 00 - SITEWIDE 04/21/1987 04/30/1987 00
Removal OU 00 - SITEWIDE 05/11/1987 06/10/1988 00
Removal OU 00 - SITEWIDE 05/13/1992 06/18/1992 00
Removal OU 00 - SITEWIDE 12/11/1988 02/10/1989 00
Five-Year Review OU 00 - SITEWIDE 04/12/2004 00
Five-Year Review OU 00 - SITEWIDE 05/13/2009 00
Five-Year Review OU 00 - SITEWIDE 05/13/2014 00
Five-Year Review OU 00 - SITEWIDE 08/17/1999 00
Five-Year Review OU 00 - SITEWIDE 11/10/1993 00
Remedial Investigation OU 01 - OU1 SOURCE CONTROL 01/28/1983 01
Feasibility Study OU 01 - OU1 SOURCE CONTROL 09/04/1985 01
Record of Decision OU 01 - OU1 SOURCE CONTROL 09/04/1985 01
Remedial Design OU 01 - OU1 SOURCE CONTROL 05/05/1986 12/11/1987 01
Remedial Action OU 01 - OU1 SOURCE CONTROL 12/31/1987 09/25/1992 01
Operation and Maintenance OU 01 - OU1 SOURCE CONTROL 09/21/1992 01
Feasibility Study OU 02 - OU2 OFF-SITE GW 04/25/2017 02
Combined Remedial Investigation/Feasibility Study OU 02 - OU2 OFF-SITE GW 05/21/1987 09/23/1991 02
Record of Decision OU 02 - OU2 OFF-SITE GW 09/23/1991 02
Remedial Design OU 02 - OU2 OFF-SITE GW 04/08/1992 09/27/2006 02
Remedial Action OU 02 - OU2 OFF-SITE GW 09/27/2006 06/30/2008 02
Remedial Action OU 02 - OU2 OFF-SITE GW 09/27/2007 02
Operation and Maintenance OU 02 - OU2 OFF-SITE GW 05/01/2008 02
Combined Remedial Investigation/Feasibility Study OU 03 - OU3 WETLANDS AND DRAINAGE WAYS 05/21/1987 03/30/1993 03
Record of Decision OU 03 - OU3 WETLANDS AND DRAINAGE WAYS 03/30/1993 03
Remedial Design OU 03 - OU3 WETLANDS AND DRAINAGE WAYS 07/27/1993 09/28/1998 03
Remedial Action OU 03 - OU3 WETLANDS AND DRAINAGE WAYS 09/08/1998 05/30/2002 03
Operation and Maintenance OU 03 - OU3 WETLANDS AND DRAINAGE WAYS 07/23/2003 03
Combined Remedial Investigation/Feasibility Study OU 04 - OU4 SUDBURY RIVER 02/18/1993 09/30/2010 04
Record of Decision OU 04 - OU4 SUDBURY RIVER 09/30/2010 04
Remedial Design OU 04 - OU4 SUDBURY RIVER 12/14/2010 04/03/2013 04
Remedial Action OU 04 - OU4 SUDBURY RIVER 09/24/2014 09/21/2017 04
Operation and Maintenance OU 04 - OU4 SUDBURY RIVER 09/21/2017 04

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.

Top of Page