Superfund Information Systems: Site Profile

Superfund Site:

OTTAWA RADIATION AREAS
OTTAWA, IL

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 04/01/1982
Proposed to the National Priorities List 07/29/1991
Finalized on the National Priorities List 10/14/1992
Remedial Investigation Started 03/26/1993
Remedy Selected 09/08/2000
Final Remedy Selected 09/24/2003
Remedial Action Started 07/20/2006
Final Remedial Action Started Estimated Jul - Sep 2021
Construction Completed Not Yet Achieved
Deleted from National Priorities List Not Yet Achieved
Most Recent Five-Year Review 11/07/2016
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 12/31/1990 00
Removal (EPA Performed) OU 00 - SITEWIDE 01/04/1988 06/14/1991 00
Removal (EPA Performed) OU 00 - SITEWIDE 01/14/1988 06/14/1991 00
Removal (EPA Performed) OU 00 - SITEWIDE 01/20/1988 09/11/1988 00
Removal (EPA Performed) OU 00 - SITEWIDE 09/28/1994 07/31/1997 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 11/07/2011 00
Five-Year Review (EPA Performed) OU 00 - SITEWIDE 11/07/2016 00
Five-Year Review OU 00 - SITEWIDE Estimated Nov 2021 - Jan 2022 00
Consent Decree (EPA Performed) OU 01 - NPL-8 CONSERVATION AREA 05/18/2010 01
Removal (EPA Performed) OU 01 - NPL-8 CONSERVATION AREA 06/27/1996 07/31/1997 01
Combined Remedial Investigation/Feasibility Study (EPA Performed) OU 01 - NPL-8 CONSERVATION AREA 03/26/1993 09/08/2000 01
Remedial Design (EPA Performed) OU 01 - NPL-8 CONSERVATION AREA 09/11/2002 03/26/2007 01
Remedial Action OU 01 - NPL-8 CONSERVATION AREA Estimated Jul - Sep 2021 01
Remedial Investigation (EPA Performed) OU 02 - NPL-1,4, 9, AND 11 11/03/1997 09/08/2000 02
Remedial Investigation (EPA Performed) OU 02 - NPL-1,4, 9, AND 11 06/06/2000 09/24/2003 02
Record of Decision (EPA Performed) OU 02 - NPL-1,4, 9, AND 11 09/24/2003 02
Record of Decision Amendment (EPA Performed) OU 02 - NPL-1,4, 9, AND 11 08/16/2010 02
Explanation of Significant Differences (EPA Performed) OU 02 - NPL-1,4, 9, AND 11 03/21/2007 02
Explanation of Significant Differences (EPA Performed) OU 02 - NPL-1,4, 9, AND 11 09/24/2018 02
Remedial Design (EPA Performed) OU 02 - NPL-1,4, 9, AND 11 09/11/2002 07/20/2006 02
Remedial Action (EPA Performed) OU 02 - NPL-1,4, 9, AND 11 07/20/2006 09/27/2016 02
Remedial Action (EPA Performed) OU 02 - NPL-1,4, 9, AND 11 09/30/2016 07/27/2017 02
Removal (EPA Performed) OU 03 - LEAD SITES 01/28/2002 12/21/2002 03
Remedial Action (EPA Performed) OU 04 - ROWE PROPERTY 09/19/2018 Estimated Jul - Sep 2020 04
Combined Remedial Investigation/Feasibility Study (EPA Performed) OU 05 - RI/FS 08/02/2005 03/21/2007 05
Remedial Design (EPA Performed) OU 05 - RI/FS 03/26/2007 12/05/2007 05
Remedial Action (EPA Performed) OU 05 - RI/FS 06/30/2008 02/03/2010 05
Record of Decision (EPA Performed) OU 06 - SEMS 09/08/2000 06
Record of Decision Amendment (EPA Performed) OU 06 - SEMS 09/06/2013 06
Explanation of Significant Differences (EPA Performed) OU 06 - SEMS 08/02/2012 06

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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