1. Omaha Riverfront Redevelopment Project Brownfields 2004 C. Dale Jacobson, P.E., DEE

2. Historical Land Use  Metal Salvage Yard  Railroad Repair Shops  Storage Tank Farm  Commercial Barge Dock  Municipal Waste Incinerator  Municipal Solid Waste Recycling Facility

3. Historical Land Use  Burt-Izard Sewer and Pump Station  Grace Street Ditch  Fire Training Center  Construction and Demolition Landfill  Small Park  Undeveloped Areas

4. Historical Research  Interviews  Aerial Photographs  Historic Topographic Maps  Historic City Maps  Sanborn Fire Insurance Maps

5. Potential Concerns  Metals  VOCs  Petroleum Hydrocarbons  Explosive Residues  Dioxin and Furan  Asbestos  PCBs

6. Regulatory  Nebraska Remedial Action Plan Monitoring Act  Nebraska Department of Environmental Quality  City of Omaha (all property except Railroad Repair Shops) Administrative Order on Consent  United States Environmental Protection Agency  Union Pacific Railroad

7. Field Investigation  Ground Water Monitoring Wells  Soil Borings  Ground Water Samples  Soil Samples

8. Analytical Work  Soil and Ground Water Analyzed for  Metals  VOCs and SVOCs  Petroleum Hydrocarbons  Nitrogen Fertilizer  Explosives  Dioxin and Furan  PCBs

9. Area-Specific Focus  Railroad Repair Shops  Petroleum  Lead  Asbestos  Metal Salvage Yard  Metals  Petroleum  Explosives  PCBs

10. Area-Specific Focus  Dock  Nitrogen Fertilizer  Metals  Petroleum  Asbestos  Construction and Demolition Landfill  Metals  Fire Training Center  Petroleum

11. Area-Specific Focus  Municipal Incinerator  Dioxin  Furan  Undeveloped Areas  VOCs  SVOCs  Metals

12. Site-Specific Target Levels (SSTLs)  No Soil Action Levels Established in Nebraska Regulations  Calculated Using Soil Analytical Results  Identify Compounds of Potential Concern  Nine COPCs Identified  Determine Human Health Risk

13. Site-Specific Target Levels (SSTLs)  Three Exposure Scenarios  Construction Excavation Worker  Child at Daycare  Commercial Worker

14. Maximum Contaminant Levels (MCLs)  NDEQ-Nebraska Title 118  Establish MCLs for Ground Water  Consistent with USEPA MCLs

15. Soil Samples Exceeding SSTLs

16. Ground Water Samples Exceeding MCLs

17. Additional Analytical Results  Furan - Not Detected  Dioxin - Not Detected  Explosives - Not Detected  Nitrogen Fertilizer - Detected  Petroleum - Detected

18. Regulatory Compliance  Initial Evaluation  Remedial Action Plans Submitted to NDEQ  Tier I Risk-Based Corrective Action Investigations - UST Locations  Evaluation Response  Tier I RBCA Reports - No Further Action (NDEQ)  Drum Storage Investigations - Clean Closure Under RCRA Regulations (NDEQ)

19. Remedial Action  Engineered Cap  3 to 6 Feet of 10 -7 cm/sec Clay  Restrictions  Cap Penetration  Drinking Water Well Installation  Recovered Metals  Recycled Off-Site  Concrete  Crushed and Reused On-Site  Petroleum-Impacted Soil Disposal  100,000 C.Y.  Nitrogen Fertilizer Recycled On-Site  21,000 C.Y.

20. Remedial Action  Lead-Impacted Soil Disposal  45,000 C.Y.  Paint-Impacted Soil Disposal  7,000 C.Y.  Asbestos-Impacted Soil Disposal  42,000 C.Y.

21. Remedial Action  Ground Water  Remediation Not Required  Designated RAC-3 by the NDEQ  Ordinance Prohibits Drinking Water Wells within Omaha City Limits

22. Long-Term Monitoring Program  Semi-Annual Inspection and Maintenance of Cap  Quarterly Ground Water Monitoring  Quarterly Surface Water Monitoring

23. Additional Improvements  Stabilized Missouri River Bank  Grace Street Ditch  Enclosed Conduit  CSO Improvements  New Nicholas Street Sewer & Lift Station  CSO Improvements  Burt-Izard Pump Station  CSO Improvements

24. Current Development Gallup Corporate Campus National Park Service Building

25. Current Development Miller’s Landing Park Qwest Convention Center and Arena

26. Current Development Riverboat Concession River City Star River Boat Concession Marina

27. Future Development  Pedestrian Bridge Across Missouri River  Retail Shops  Condominiums  Gallup Campus Build-Out

28. Brownfields Success  Cooperative Effort Between  USEPA  NDEQ  City of Omaha  Union Pacific Railroad  Changed Impacted Industrial Area to:  Qwest Convention Center and Arena  Gallup Corporate Campus  National Park Service  Park  Riverfront Trail