Environmental Assessment


Ford Motor Company has enrolled the Twin Cities Assembly Plant site in the following two programs with the Minnesota Pollution Control Agency (MPCA). All reports and press releases posted below relate to Ford's participation in these programs. Explanations of each program are provided below. MPCA Voluntary Investigation and Cleanup (VIC) MPCA Petroleum Brownfields Program


Environmental assessment activity began at the site in 2007.  Testing around and under buildings occurred as soils were exposed, and tests and activities were documented and reviewed by the Minnesota Pollution Control Agency.  A history of the environmental testing, reports and remediation activities are documented in the complete list of "Reports/Work Plans" below.

Comprehensive site wide testing of the 122-acre Ford parcel concluded in Spring 2016.  Environmental remediation work has begun and will continue over the next couple of years.  Additional spot testing and remediation work plans will be undertaken as necessary if new findings are made during the remediation process.

Ford's 22-acre river parcel, containing "Area C", has undergone soil boring tests and has wells installed for periodic sampling and water quality monitoring.  Information on "Area C" is included in the list of documents below.  

Reports/Work Plans

[LISTED from oldest to most recent] Phase I Environmental Site Assessment (June 29, 2007)
Soil Investigation Report - Baseball Fields - Feature 139 (September 7, 2007)
Soil Investigation and Risk Assessment Work Plan - Baseball Fields - Feature 139 (September 7, 2007)
Initial Phase II - Exterior Investigation Report (October 31, 2007)
Additional Soil Investigation and Surface Soil Risk Assessment - Baseball Fields - Feature 139 (December 19, 2007) Briefing Letter Executive Summary Full ReportFigures Tables Appendices
Response Action Implementation Report - Baseball Fields - Feature 139 (March 13, 2008)
Groundwater Seep & Mississippi River Sampling Work Plan (April 11, 2008)
Supplemental Phase II Exterior Investigation Work Plan (May 13, 2008)
North Parking Area Supplemental Phase II - Exterior Investigation Work Plan (May 19, 2008)
Quarterly Groundwater Sampling Event (June 27, 2008)
Quarterly Groundwater Sampling Event (December 31, 2008)
Phase II - Interior Investigation Work Plan (May 28, 2010)
Tunnel 1A Response Action Implementation Report(January 1, 2011)
Seep and River Sampling Events(February 22, 2011)
Final/Initial Receptor Survey (July 18, 2011)
Underground Storage Tank (UST) Sump Sampling Events (December 5, 2012)
MPCA Approval - UST Sump Sampling Report(February 8, 2013)
Final Supplemental Phase II Exterior Investigation Report(May 31, 2012)
MPCA Response - Revise Supplm Phase II Exterior Report(February 4, 2013)
Revised - Final Supplm Phase II Exterior Investigation Report(40MB) (May 29, 2013)
MPCA Approval - Revised Supplm Phase II Exterior Investig. Report(Sept 5, 2013)
North Parking Area Statistical Analysis NFA Request (July 2012, 2013)
MPCA Response - North Parking Area NFA Request(February 7, 2013)
Final Propane Sampling of tank removals (May 6, 2013)
Underground Storage Tank (UST) Removal - Environmental Contingency Plan (April 9, 2013)
MPCA Approval - UST Removal Contingency Plan (May 28, 2013)
Subsurface Investigation Work Plan - Element 1 (July 15, 2013)
MPCA Approval - Subsurface Investigation Work Plan - Element 1 (September 17, 2013)
Site-Wide Environmental Contingency Plan during demolition(July 17, 2013)
MPCA Approval - Environmental and Site-Wide Contigency Plan (August 14, 2013)
Area C - Comprehensive Site History and Investigation Report(5MB) (April 4, 2014)

Subsurface Investigation Work Plan - Element 2 (June 6, 2014)
Retention Pond Work Plan (July 11, 2014)
Data Collected from Monitoring Wells Along the Mississippi (September 2, 2014)
Area C Investigation Work Plan (March 17, 2015)
MPCA Approval - Area C Investigation Work Plan(May 19, 2015)
Underground Gasoline Storage Tank Removal Report (April 13, 2015)
Site Decommissioning Response Action Plan (April 1, 2015)
MPCA Approval - Site Decommissioning RAP (May 22, 2015)

PDF iconFinal Phase II Comprehensive Investigation Report – Overview (March 31, 2016 - revised from Dec. 2015 Draft)
Please note: The full report and 7 appendices total nearly 3,000 pages of technical data (175 MB).  This overview excerpt from the report provides a summary of the information.  The MPCA response letter below requests modest revisions to the report regarding data presentation, which will not change the findings.  Additional testing is outlined at the end of the Overview document and will be reported here when available.

MPCA Response – Final Phase II Comprehensive Investigation Report (February 19, 2016)

Final Site Decommissioning Response Action Plan (SDRAP) Implementation Report (March 31, 2016) and MPCA Approval - SDRAP Addendums March 7, 2016  Please note: This overview excerpt from the report provides a summary of the information.  The appendices for these reports are very large, with large sets of numbers and field notes, and are therefore not posted here.  They are available upon request.

Interim Response Action Plan for Isolated Impact Area (June 8, 2016)

Comprehensive Phase II Site Investigation Report: Soil Addendum (August 8. 2016) -- SummaryTablesFigures 1-5 and 6-10
Please note: The summary, tables and figures provide key information and highlights from the report.  The report appendices are large documents, with tables of numbers and field notes.  They are available upon request.


Environmental Health Questions

For questions and concerns about environmental health issues related to ongoing investigations at the site, please call:

  • Amy Hadiaris, Minnesota Pollution Control Agency - 651-757-2402image