Item No. 6f supp
Meeting Date: June 12, 2018

Begin Clean-up Design on
Lower Duwamish Waterway

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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
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