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Portland Harbor Superfund Site Draft Feasibility Study

Portland Harbor Superfund Site Draft Feasibility Study. Spring 2012 Bob Wyatt, Chair Jim McKenna, Senior Project Manager. Portland Harbor Superfund Site. Listed in 2000 as Superfund Site U.S. EPA and Oregon DEQ leading cleanup (with multiple federal and state agencies and Tribal governments)

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Portland Harbor Superfund Site Draft Feasibility Study

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  1. Portland Harbor Superfund SiteDraft Feasibility Study Spring 2012 Bob Wyatt, Chair Jim McKenna, Senior Project Manager

  2. Portland Harbor Superfund Site • Listed in 2000 as Superfund Site • U.S. EPA and Oregon DEQ leading cleanup (with multiple federal and state agenciesand Tribal governments) • Lower Willamette Group – 12 companies and 2 public agencies funding cleanup studies

  3. Portland Harbor Superfund Site • Nearly $100 million for studies, investigation, anddataanalysis over 10 years • Early cleanups have occurred in some areas • Sampling results through 2010 • EPA will determine final cleanup

  4. Portland Harbor Superfund Site Remedial Investigation report (river conditions and risks) submitted in 2011 River changed over 160 years of use Navigation channel – maintained to 40 feet deep Sediment coming in from upstream settles on river bottom

  5. What we know Contamination generally higher in deeper sediments than surface layer Contamination generally higher near shore than in navigation channel Natural recovery occurring mainly because cleaner sediment from upriver is moving into the harbor

  6. What we know Sediments contaminated mainly from historical use of river The potential risk from four chemical groups generally overlap the risks from other chemicals Those four chemical groups are: PCBs Dioxins/furans The pesticide DDT and its related breakdown products PAHs (polycyclic aromatic hydrocarbons) Contaminants also exist upstream

  7. Surface Sediment PCBs

  8. What we know • Risks to human health – cancer and non cancer • Risks to wildlife and sediment organisms - survival

  9. What we know Risk mostly from regularly eating local fish (bass, carp) No significant risk from swimming or beach use and eating migrating fish (salmon) Health advisories on fish consumption throughout all of Willamette Riverand not just Portland Harbor

  10. Draft Feasibility Study Options • Eleven alternatives • No Action (required by law to evaluate) • 5 are removal focused (dredging) • 5 are integrated (still involve significant dredging) • Assumes sources will be controlled

  11. Remedial Action Levels

  12. Sediment Cleanup Areas

  13. Cleanup Methods Combinations of methods used in different areas of the Site • Dredging • Capping • Treatment – in place or after dredging • Innovative Technologies • Monitored Natural Recovery • Enhanced Monitored Natural Recovery

  14. Alternatives

  15. Superfund Cleanup Criteria 2 Threshold • Protect human health and the environment • Comply with federal and state laws 5 Balancing • Long-term effectiveness and permanence • Reduce toxicity, mobility or volume through treatment • Short-term effectiveness • Implementability • Cost 2 modifying • State acceptance • Community acceptance DRAFT FS PROPOSED PLAN

  16. Draft Feasibility Study Options • All adequatelyreduce risks to human health and environment (except the No Action Alternative) • Differences - cleanup action levels, active cleanup time, impacts, use of technology, and cost

  17. PCB Sediment Concentration Over Time

  18. Total Site: 2,172 Acres Sediment Cleanup Areas

  19. Total Site Acres: 2,172 Current PCB Average: 84ppb Site-Wide PCB Reduction Construction TimePCB Averagea 45 Yearsb 2 to 6 years 44 pp 12 to 18 ppb 3 to 7 years 41 ppb 12 to 18 ppb 3 to 8 years 38 ppb 12 to 18 ppb 7 to 12 years 33 ppb 12 to 18 ppb 15 to 28 years 26 ppb 12 to 18 ppb 391 acres 191 acres 76 acres 95 acres 49 acres 1,357 acres 484 acres <17 ppb 17 to 75 ppb Alt. F >75 ppb Alt. E >200 ppb Alt. D >500 ppb Alt. C >750 ppb Alt. B >1,000 ppb • End of Construction • 45 years from start of construction.

  20. Alternatives Comparison

  21. Best Scoring Alternatives

  22. Next Steps • EPA reviews draft Feasibility Study • EPA prepares Proposed Plan • Public Comment on Proposed Plan • EPA issues Record of Decision • Agreements for cleanup implementation • Sources controlled • Cleanup actions begin • Monitoring over many years

  23. Contacts • EPA • www.epa.gov/region10/portlandharbor • LWG • www.lwgportlandharbor.org • Portland Harbor CAG • www.portlandharborcag.info

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