Item 7a Supp
ITEM NO. _7a_supp__ DATE OF MEETING May 5, 2009 Briefing on the Lower Duwamish Superfund Site The Duwamish River 2 Active Industrial and Commercial Corridor with Two Residential Community Neighbors Growing Population Economic Habitat Restoration Competitiveness Global Marketplace Recreational and Commercial Uses 3 Who is Involved So Far? Regulatory Agencies 4 Who is LDWG? Regulatory Agencies Lower Duwamish Waterway Group 5 Roles and Responsibilities Regulatory Agencies Lower Duwamish Sampling Waterway Group Studies Plans Analyses 6 Key Milestones NOW 2001-2002 2009 2009 2011 2011 What and What and What and What and Where isThere's a Where is Where isHow Proposal Decision: Where is the Risk ?Problem the Risk ? the Risk ?Could it be to Clean How it will be the Risk? Cleaned Up? it Up Cleaned Up Superfund Remedial Feasibility Proposed Record of List (NPL) Investigation Study (FS) Plan (PP) Decision (RI) & Risk (ROD) Washington Assessments Cleanup Hazardous Action Plan Sites List (CAP) 7 Post-Decision Steps Negotiate Continue & Fund Design the Upland Construct Long-Term Cleanup Remedy Source the Remedy Monitoring Agreement Control 8 Ecology and EPA Active in Lower Duwamish Ecology has primary responsibility for controlling pollution from upland sources under the Model Toxics Control Act EPA has primary responsibility for in-water cleanup under Superfund or CERCLA and other authorities There is some overlap. 9 A Lot is Happening Now More Work Remains to be Done 10 Remedial Actions in LDW EPA Sites Ecology Sites Areas under Investigation 11 Contamination: What's the Concern? PCBs (Polychlorinated biphenyls) PAHs (Polycyclic aromatic hydrocarbons) Dioxins and furans Arsenic Other chemicals including phthalates 12 Study Area and LDWG - sponsored Early Action Areas 13 Contamination: Where Is It? 14 Starting to Look at Options 2001-2002 2009 2009 2011 2011 What and How Proposal Decision: There's a Where is to Clean How it will be Problem Could it be the Risk? Cleaned Up? it Up Cleaned Up Superfund Remedial Feasibility Proposed Record of List (NPL) Investigation Study (FS) Plan (PP) Decision (RI) & Risk (ROD) Washington Assessments Cleanup Hazardous Action Plan Sites List (CAP) 15 Cleanup Goals Seafood Consumption Worms and Benthic Invertebrates Direct Contact with Contaminants Fish and Wildlife Cleanup goal is to reduce risk. How will we go about It? 16 Source: Windward (2008) Average PCB concentrations in chinook salmon Source: EPA (2008) Multiple Technologies Available 19 Technologies Combine Into Five Options Early Actions Hot Spot Containment Removal Maximum Only Removal Focus Focus Removal Acres Managed : 34 Acres Managed : 193 Acres Managed: 193 Acres Managed: 193 Acres Managed: 315 Estimated Cost: Estimated Cost: Estimated Cost: Estimated Cost: Estimated Cost: $50 million $220 million $270 million $480 million $1.2 billion Years to Complete: 5 Years to Complete:10 Years to Complete: 11 Years to Complete: 17 Years to Complete: 41 Early Action & Containment Monitoring and Natural Recovery & Dredging Verification Monitoring 20 Regulatory Agencies Consider These Criteria When Evaluating an Option Protection of human health and the environment Consistent with all other environmental standards Effective Construction Includes Ability Cost Long Time & Treatment to Get Termtext Impacts It Done Acceptance of community, state and tribal nations 21 Figure ESb'b: Comparative MTCA Ratings Weighted Ratings Under MTCA Cost Alternative (Net Present Value) Total Benets by Criterion 3 Notes: a See Appendix J for detailed evaluation E] Overall Protectiveness -Permanence E] Long-Term Effectiveness El Management of short-term risks - lmplementability Community Involvement and Cleanup Alternatives Draft FS to recommend Approach but not an Alternative Clean up most contaminated areas first Robust monitoring, reevaluating modeling, revisit conclusions Invest in gaining understanding while moving forward Take additional actions as needed Community involvement process ongoing Conceptual Effect of Cleanup Approaches on Seafood Risks 24 Challenging Issues Balancing cost and time to achieve cleanup goals Maintaining multiple uses Avoiding recontamination Setting cleanup goals 25 www.portseattle.org
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