East Waterway Fact Sheet: Clean Up Alternatives

• East Waterway, Feasibility Study Cleanup Alternatives

Feasibility Study Documents

• Final Feasibility Study – June 2019
  • Complete FS
  • Executive Summary
  • Main Text of FS
  • Appendices
    • A – Supplemental Information for Selection of PRGS
    • B – Sediment Modeling Memoranda
    • C – Remediation Area Evaluation
    • D – Cap Modeling
    • E – Cost Estimate
    • F – Volume Calculations
    • G – Monitoring
    • H – Remaining Subsurface Contamination
    • I – Short-Term Effectiveness Metrics
    • J – Detailed Calculations and Sensitivity for Predictive Evaluation of Siter Performance Over Time and Recontamination Potential
    • K – Direct Atmospheric Deposition Evaluation
    • L – Alternatives Potential
• Final Remedial Alternative and Disposable Site Screening Memorandum – October 2012
• Final Anthropogenic Background Memorandum – July 2021

Remedial Investigation Documents

• Existing Information Summary Report – March 2008
• East Waterway Conceptual Site Model and Data Gaps Analysis Report – December 2008
• Sediment Data Reports
  • Subsurface Sediment Data Report – November 2010
  • Intertidal PAH Memorandum – September 2010
  • Surface Sediment Data Report – September 2010
  • Clam Survey, Geoduck Survey, Fish and Shellfish Tissue Collection PCB Congene and Dioxin/Furan Results Data Report – July 2010
  • Juvenile Chinook Salmon Tissue Data Report – May 2010
  • Fish and Shellfish Data Report – April 2010
  • Clam Data Report – January 2010
  • Surface Water Data Report – December 2009
  • Benthic Data Report November 2009
• Sediment Transport Evaluation Reports
  • East Waterway Sediment Transport Evaluation Approach Memorandum – December 2008
  • Sediment Transport Report – August 2012
• Source Control
  • Source Control Evaluation Approach Memorandum – June 2008
  • Initial Source Evaluation and Data Gaps Memorandum – December 2009
• Final Supplemental Remedial Investigation – January 2014
  • RI Text
  • Map Folios
    • Executive Summary and Section 1
    • Section 2
    • Section 3
    • Section 4 Part 1
    • Section 4 Part 2
    • Section 5 and 7
    • Sections 9 and 10
  • Appendices
    • Appendix A – Ecological Risk Assessment
      • ERA Text
      • ERA Maps
      • ERA Attachments
    • B – Baseline Human Health Risk Assessment
    • C – Food Web Model and Dioxin BSAF
    • D – Data Management and Interpolation Parameters
    • E – Spill Documentation
    • F – Status of Source Control Activities Within Storm Drainage Basins and CSO Basins
    • G – Properties Documentation
    • H – CSO and Stormwater Whole Water Data
    • I- Storm Drain and CSO Solids Data
    • J – Groundwater Data Summary Tables
    • K – Compiled Source Control Maps
    • L – Inspections
• HHRA cPAH Addendum – April 2019

Authorizing Documents

• Final Administrative Settlement Agreement and Order of Consent – October 2006
• Final Supplemental Remedial Investigation/Feasibility Study Workplan – July 2007