6f Lower Duwamish presentation

Item No. 6f supp
Meeting Date: June 12, 2018 
Begin Clean-up Design on
Lower Duwamish Waterway 

1

4th Amendment to the 
Administrative Order on Consent 
Begin the Cleanup Design for the
upper third of the LDW 
Approximately 2 miles 
Continue monitoring fish tissue and
water concentrations 
Continue to fund the seafood
consumption advisory efforts 
Port's cost $4-5M via Environmental Remediation Liability program 
2

Cleanup Design Includes 
Sampling to refine the extent and type of cleanup method 
Engineer design drawings and specifications 



3

Timeline 
2016      2017      2018      2019      2020      2021      2022      2023      2024 
ENR Carbon Pilot Study (AOC2) 

Pre-Design/Baseline Study (AOC3) 
Cleanup Design of the Upper Third (AOC4) 

Seafood Consumption Advisory (AOC1, AOC3, and AOC4) 

Construction 
4

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