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The Eastern Michaud Flats Superfund Site covers approximately 2,530 acres northwest of Pocatello, Idaho. It includes two adjacent phosphate ore processing facilities. The former FMC Corporation operated a facility from the early 1940’s until December 2001. The J.R. Simplot Company Don Plant is still an active facility. EPA issued a Record of Decision (ROD) for the site in 1998. A Supplemental Remedial Investigation and Feasibility Study (RI/FS) was issued in 2010 for the FMC portion of the site, while groundwater remediation at the Simplot site is ongoing. Site Update The FMC Corporation will begin cleanup work at their former phosphorus processing facility under a Unilateral Administrative Order from EPA. EPA’s Order requires FMC to design, implement and pay for the actions specified in the September 2012 Interim Record of Decision Amendment under oversight by EPA and the Shoshone-Bannock Tribes. Requirements include: Develop detailed technical plans and specifications for the cleanup actions Construct caps over contaminated soil Treat groundwater to prevent contamination from moving toward the Portneuf River Read the Order: Unilateral Administrative Order for Remedial Design and Remedial Action (PDF) (51 pp, 415K) Read the fact sheet about the Interim Record of Decision Amendment: Plan to Address Pollution at Former FMC Phosphorus Processing Plant (PDF) (4 pp, 725K) Technical Documents Key Superfund Documents: Unilateral Administrative Order for Remedial Design and Remedial Action (PDF) (51 pp, 415K) Interim Record of Decision Amendment for the Eastern Michaud Flats Superfund Site, FMC Operable Unit (PDF) (299 pp, 19MB) - October 2012 Proposed Plan for Interim Amendment to the FMC Record of Decision (PDF) (110 pp, 6MB) - September 2011 Site-Wide Gas Assessment Report for FMC Operable Unit (PDF) (196 pp, 24MB) - December 2010 Unilateral Order issued to FMC for Phosphine Gas at Additional Closed RCRA Ponds (PDF) (47 pp, 673K) - June 2010 2010 Interim Record of Decision Amendment for the Simplot Operable Unit (PDF) (56 pp, 1MB) - January 2010 2009 Proposed Plan to Amend the Record of Decision for the Simplot Operable Unit (PDF) (42 pp, 3.9MB) 2006 Unilateral Order to FMC to install a gas treatment system (PDF) (37 pp, 7.4MB) Appendix A, Statement of Work (PDF) (10 pp, 109K) Appendix B, Action memo (PDF) (13 pp, 3.3MB) 2003 Administrative Order on Consent (PDF) (28 pp, 980K) 1998 Superfund Record of Decision (ROD) ID Number: EPA/541/R-98/034 Text Only (PDF) (172 pp, 285K)- June 8, 1998 1998 Superfund Record of Decision (ROD) ID Number: EPA/541/R-98/034 with Maps/Tables (PDF) (227 pp, 15MB) - June 8, 1998 1998 ROD color Figures (PDF) (9 pp, 6MB) Other Superfund Documents: Administrative Records: Note: The FMC/RCRA Ponds Time Critical Removal Administrative Record is available from Region 10 Superfund Records Center Administrative Record Table of Contents (PDF) (2 pp, 19K) Administrative Record Index (PDF) (111 pp, 433K) Administrative Record for Time Critical Removal Actions (PDF) (2 pp, 17K) Administrative Record Table of Contents and Index for the 16S Pond Removal Action (PDF) (21 pp, 202K) Administrative Record Index for the FMC/RCRA Ponds Time Critical Removal Action (PDF) (19 pp, 131K)

Site Information Site Progress Profile Site Summary (NPL PAD) RCRA Site Summary Pond 16 Removal Action Decision Documents Technical Documents Fact Sheets Photo Gallery Site Map Information Repository Locations Freedom of Information Act (FOIA) Requests Contact Us: Project Managers: Simplot Area and Off-Plant Areas Jannine Jennings (jennings.jannine@epa.gov) 206-553-2724 or 800-424-4372 FMC Kevin Rochlin (rochlin.kevin@epa.gov) (206) 553-2106, or 800-424-4372 Community Involvement Coordinator: Kay Morrison (morrison.kay@epa.gov) (206) 553-8321, 800-424-4372 Cleanup Timeline 2011 Simplot OU- GW Extraction System completion (August);GW extraction and monitoring (ongoing);Completion of lower gypstack lining (Summer);Start of upper west compartment gypstack lining (Summer) FMC OU -GW Monitoring Report (Spring); RCRA Post Closure Plan Modification (Fall); UAO RCRA Ponds (ongoing); Proposed Plan and Public Meetings (Fall); Offplant OU -Vegetation monitoring (Summer/Fall) 2010 2009 2008 1990 - 2007

FMC Supplemental Remedial Investigation and Feasibility Study (RI/FS):

• FMC Plant OU – Interim CERCLA 2009 Groundwater Monitoring Report (PDF) (173 pp, 2MB) - February 2011
• Ready for Reuse Determination FMC Plant Operable Unit, SRIA Parcels 4 to 6 (PDF) (29 pp, 12MB) - November 2010
• FMC Supplemental Feasibility Study (PDF) (413 pp, 27MB) - July 2010
• FMC Supplemental Feasibility Study Appendices (PDF) (1038 pp, 34MB) - July 2010
• FMC Supplemental Feasibility Study Revised Work Plan (PDF) (271 pp, 8.6MB) - March 2010
• FMC Supplemental Remedial Investigation Volume 1: Report (PDF) (586 pp, 25MB) - January 2010 (Appendices are available for review at any repository location, or upon request to Kira Lynch (lynch.kira@epa.gov) / 206-553-2144)
• FMC Supplemental Remedial Investigation Addendum Report (PDF) (157 pp, 11.7MB) - January 2010 (Appendices are available upon request to Kira Lynch (lynch.kira@epa.gov) / 206-553-2144)
• FMC Groundwater Current Conditions Report (PDF) (429 pp, 10.8MB) - June 2009
• Tables and Figures (PDF) (115 pp, 12.6MB)
• Appendices (PDF) (890 pp, 24.3MB)
• Statement of Work (PDF) (20 pp, 159K) - October 9, 2003
• Figure 1 Map (PDF) (1 page, 96K)
• Figure 2 Decision Tree (PDF) (1 page, 47K)

Simplot Documents:

• 2011 Groundwater / Surface Water Remedy (PDF) (191 pp, 12.2MB) - March 2012. The 2011 annual summary of operational information, monitoring results and performance evaluations of the groundwater/surface water remedy for the Simplot Operable Unit of the Eastern Michaud Flats Superfund Site.
• Simplot Groundwater and Surface Water Monitoring Plan (PDF) (438pp, 11MB) - June 2010
• Simplot Groundwater Extraction System Remedial Design Report (PDF) (299pp, 30MB) - June 2010
• Simplot Groundwater Extraction System Remedial Action Work Plan (PDF) (41pp, 1MB) - January 2010
• 2009 Groundwater Extraction System Report (PDF) (273 pp, 33.4MB)
• 2007 Simplot Groundwater Extraction System Report (PDF) (81 pp, 3.9MB)
• 2006 Simplot Groundwater Extraction System Report (PDF) (72 pp, 3.2MB)
• 2002 Simplot Consent Decree (PDF) (82 pp, 2.7MB)
• Appendix A: EMF Record of Decision (PDF) (227 pp, 23MB)
• Appendix B: Statement of Work (PDF) (31 pp, 1MB)

Off-site Documents

• Final Off-Plant OU Soils RAD Report (PDF) (61 pp, 7.7MB) - November 2010

RCRA Cleanup Actions:

• RCRA Hazardous Waste Management at FMC
• Request RCRA Documents through the FOIA Process

Other Documents:

• Evaluation Of Water Quality Impacts Associated With FMC and Simplot Phosphate Ore Processing Facilities, Pocatello, Idaho (PDF) (112 pp, 4.9MB) - IDEQ, 2004
• Ecological Risk Assessment (PDF) (390 pp, 8MB) - July 1995

Fact Sheets and Outreach


Fact Sheets

• Plan to Address Pollution at Former FMC Phosphorus Processing Plant (PDF) (4 pp, 725K) - October 2012
• Revised Cleanup Plan Proposed for FMC Operable Unit (PDF) (6 pp, 775K) - September 2011
• EPA Orders FMC to Treat Phosphine Gas at Additional Closed Ponds (PDF) (4 pp, 1.6MB) - June 2010
• February 2009 - Simplot OU Record of Decision Change Fact Sheet (PDF) (2 pp, 79K)
• June 2008 - Fact Sheet and July Public Meeting Notice (PDF) (4 pp, 157K)
• December 2006 - EPA orders FMC to address gases from former waste pond (PDF) (2 pp, 114K)

Public Meetings

• July 25, 2008 Public Information Meeting Presentations (PDF) (39 pp, 3MB)

Southeast Idaho Update Newsletter

• Southeast Idaho Update Newsletter- FMC Pond 16S Toxic Gases Under Control (PDF) (6 pp, 914K) - April 2010
• Spring 2006 (PDF) (4 pp, 913K)
• Autumn 2003 (PDF) - (4 pp, 76K)
• Spring 2002 (PDF) (6 pp, 353K)
• Fall 2001 (PDF) - (5 pp, 291K)
• Summer 2001 (PDF) - (5 pp, 423K)
• August 2000 (PDF) - (8 pp, 40K)
• July 2000 (PDF) - (6 pp, 40K)

Information Repository Locations
Hard copy documents and information are available at the following locations during regular business hours:

American Falls Library
308 Roosevelt Street
American Falls, ID 83211
(208) 226-2335

Idaho State University Library
Government Documents
850 South 9th Avenue
Pocatello, Idaho 83209
(208) 282-3152

Shoshone-Bannock Library
Tribal Business Center
Pima Drive and Bannock Avenue
Fort Hall, Idaho 83203
(208) 478-3882

EPA Region 10 Superfund Records Center
1200 Sixth Avenue, Suite 900, ECL-076 (7th Floor)
Seattle, WA 98101
(206) 553-4494

Related Links

• Shoshone-Bannock Tribes
• Shoshone-Bannock Tribes Environmental Waste Management Program
• Idaho Department of Environmental Quality