Regulatory Activities

The Department of Environmental Quality announced that an agreement has been reached with the Dow Chemical Company on framework to begin immediate work toward the cleanup of dioxin contamination in Midland, along the Tittabawassee River, the Saginaw River, and Saginaw Bay.

"The framework enables us to take immediate actions while we continue to develop a responsible, science based, final resolution to the situation for residents, our communities, and the Mid-Michigan region," said Susan Carrington, Vice President and Director of the Michigan Dioxin Initiative for Dow Chemical.

To read the full announcement and learn more about the immediate actions planned, please visit the Michigan Department of Environmental Quality (MDEQ) website. The following documents are also available to download:

Work Plans:

Midland

• Midland Area Soils Remedial Investigation - October 15 (33MB PDF)

Titttabawassee River

• 2007 GeoMorph® Sampling and Analysis Plan, Upper and Middle Tittabawassee River, Midland, Michigan - July 2, 2007 (312MB PDF)
• Remedial Investigation Work Plan
  Tittabawassee River and Floodplain Soils, Midland, Michigan,Volume 1 - July 2, 2007 (24MB PDF)
• Remedial Investigation Work Plan
  Tittabawassee River and Floodplain Soils, Midland, Michigan,Volume 2 - July 2, 2007 (416KB PDF)
  • Remedial Investigation Work Plan, Tittabawassee River and Upper Saginaw River and Floodplain Soils, Midland, Michigan, Volume 2, Sections 6-8 - July 2, 2007 (7MB PDF)
  • Appendix E:  Summary of University of Michigan Dioxin Exposure Study - July 2, 2007 (15MB PDF)

Saginaw River

• Draft Saginaw River and Bay Current Conditions Report - September 17, 2007 (13MB PDF)
• Work Plan for Fall 2007 - September 17, 2007 (22MB PDF)
• Revised Saginaw River / Bay Remedial Investigation Scope of Work - October 15, 2007 (861KB PDF)

Reports:

• Data Evaluation Report in Support of Bioavailability Study, Midland Area Soils - March 2007 (6KB PDF)
• Revised Version of the Dow Direct Contact Criteria Report for Midland Area Soils (DCC Report) - November 30, 2007 (12KB PDF)
• Analytical Report for Fish Sampled from the Tittabawasee and Saginaw Rivers in Support of Human Health Risk Assesment - December 17, 2007 (23KB PDF)
• Analytical Report for Wild Game Sampled from the Tittabawasee and Saginaw River Floodplains in Support of Human Health Risk Assesment - December 17, 2007 (14KB PDF)

Submittal Letter:  Final GeoMorph Pilot UTR Site Characterization (48KB PDF)

GeoMorph Pilot Site Characterization Report:  Upper Tittabawassee River and Floodplain Soils, Midland, MI (365KB PDF)

• Appendix A – Study Area – Reaches a Through O, Reach Overview 100-Year Floodplain, Tittabawssee River (5MB PDF)
  
  
• Appendix B – Thalweg/Longitudinal Profile (79KB PDF)
  
  
• Appendix C – 1937 and 2004 Channel Comparison (45MB PDF)
  
  
• Appendix D – Sample Location Summary (246KB PDF)
  
  
• Appendix E – Method Comparability Study Summary USEPA 1613B and Method 1613-TRP/RT (128KB PDF)
  
  
• Appendix F – USEPA Appendix IX Target Analyte List (26KB PDF)
  
  
• Appendix G – 2006 Aerial Photography and High Resolution Topographic Mapping (50MB PDF)
  
  
• Appendix G2 - 2006 Aerial Photography and High Resolution Topographic Mapping (73MB PDF)
  
  
• Appendix H – Historic Outfalls, The Dow Chemical Company, Midland, Michigan (10MB PDF)
  
  
• Appendix I – Geochemistry Protocol and Results (828KB PDF)
  
  
• Appendix J – Report on Development of Hydrodynamic Model, Tittabawasse River (15MB PDF)
  
  
• Appendix K – Conceptual Model of Solids Movement, Tittabawasse River and Floodplain (94KB PDF)
  
  
• Appendix L – Maximum TEQ by Location Maps (99MB PDF)
  
  
• Appendix M – Surface TEQ Concentration Maps (99MB PDF)
  
  
• Appendix N – Cross-Sections (2MB PDF)
  
  
• Appendix O – Fixed-Interval and Random-on-Grid Maps, Statistical Calibration and Verification (23MB PDF)
  
  
• Appendix P – Technical Memorandum, Statistical Calibration and Verification (328KB PDF)
  
  
• Appendix Q – Preliminary In-Channel Sediment Inventory (35KB PDF)
  
  
• Appendix R – Site Characterization Data Summary Report (4MB PDF)
  
  
• Appendix S – Site Characterization Data Summary Report, Erosion Scar Sampling (93KB PDF)
  
  
• Appendix T – USEPA Appendix IX Laboratory Report, Summary of USEPA Appendix IX Site Positives, Tentatively Identified Compounds – USEPA 8260B, Tentatively Identified Compounds – USEPA 8270C (2MB PDF)
  
  

Dow-DEQ Framework of Agreement (77KB PDF)

Midland Soils IRA Map (620KB PDF)

Tittabawassee River Floodplain IRA Map (635KB PDF)

Midland Soils IRA Work Plan (333KB PDF)

Tittabawassee River Floodplain IRA Work Plan (528KB PDF)

Exposure Mitigation and Enhancements at Parks (19KB PDF)