1. Background and lessons learned Managers Meeting February 13, 2014

2. Chemical Disposal 1947-1962 1947 Aerial Photo Former General Mills Facility 2010 East Hennepin Avenue Minneapolis

3. Generalized Groundwater Contamination Water Table

4. Groundwater Contamination

5. Soil and Groundwater Cleanup 1981“absorption pit” removed addressing the soil contamination. 1984 Response Order by Consent between MPCA and General Mills 1985 Extraction and Treatment of Contaminated Groundwater began. 2010 Groundwater system turned off. TCE concentrations below the cleanup concentrations established in the Consent Order

6. Soil Gas Investigation 2012-2013

7. Generalized Vapor Intrusion Dissolved contamination in groundwater

8. November 6, 2013 Mailing to Residents

9. Public Involvement Two Public Meetings November 12, 2013 Five Community Group Meetings “Office hours” sessions MPCA Project website E-mail distribution list for interested parties Widely covered in local media

10. Sub-slab Sampling

11. Building Mitigation

12. Current Status

13. Sub Slab Sampling XX properties sampled Sub Slab Sampling Results XX properties over 20ug/m3 Mitigation Systems XX mitigation systems installed

14. Additional Remedial Actions Roadmap figure

15. Questions & Discussion