Item No. 8e_supp
Meeting Date: February 9, 2021
Industrial Wastewater System (IWS)
Segregation Meters
Budget Increase Request
Presenters:
Brad Benson
Paul Shen
Sarah Cox

Background and Justification
Scope: Install four Total Organic Carbon analyzers into the Industrial Wastewater
System (IWS) that will sample wastewater prior to lagoon storage.
Purpose: Segregation of stormwater with higher and lower levels of contamination.
Goal: Maintain compliance with King County and Washington Department of
Ecology permits and be in alignment with the All Known Available Reasonable
Methods of Treatment initiative.


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IWS Segregation Meters Project Location
(southwest end of airport)






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Actions to Meet Future Effluent Limitations
Measures to Meet Reduced Limits        Implementation            Compliance Schedule
Hybrid Deicing Trucks (50% fleet)                Complete                         2019
IAF, NSAT, Concourse D           2019
IWS to the SDS Diversions
SAMP NTP                    SAMP NTP
TOC Meter Project                             Capital Project Underway        2020
Blend to Temperature
50% applicators                           50%: Complete                 2023
100% applicators                         100%: New Facility             2025
Upgrade IWTP Controls                        IWTP Controls Project           2024
High Concentration Storage
Snow Melt Improvements       2025
(Minimum 1M gal)
Lagoons Mixing Pumps                       IWTP Improvement Project      2025

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Potential project risks
Risk               Description          Prob.  Impact       Mitigation Plan
Delay construction until
Project is dependent on dry                       weather improves. IWTP
Weather delay    weather for construction         M       H    must remain operational.
Increased project budget.
Added additional
contingency.
Will conduct contractor
outreach during
Project delay      Bid irregularity, bid protest        M        H    advertisement.
Continue to have detailed
Due to project proximity to FAA                   coordination meetings with
Fiber Optic lines, detailed                           FAA. Submitted updated
coordination required prior to                     documents to FAA for
FAA approval      construction starting              L       H    review.


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Project Cost Estimate and Budget Request
Authorized Capital Budget                                  $2,242,000
Current Estimate at Completion (Ready to Bid)              $3,857,000
Total Additional Budget Request                            $1,615,000
Primary Cost Drivers
Aggressive construction schedule (6 day work schedule)
Concrete Encased Duct Bank for TOC meter fiber
Temporary Erosion Control for duct bank construction
TOC Analyzers (Two to Four)
Class 1 Division 1, Electrical Classification for electrical equipment
Procurement/project delivery method
Additional Security (X ray support)

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Critical project milestones
2/23/21 Advertise for Construction
3/25/21  Bid Opening
5/4/21   Construction Contact Executed
6/17/21 Notice to Proceed Issued to Contractor
9/15/21  Substantial Completion

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Alternatives
Alternative 1  Do not install four new Meters
Cost Implications: $450,000 in capital costs spent to date would need to be expensed.
Pros:
No Capital Costs required.
Cons:
The Port of Seattle would not be in compliance with King County and Washington Department of
Ecology permits.
The IWTP will continue to mix low level and high level contaminated wastewater and discharge
that wastewater for treatment at a cost to Port of Seattle.
Does not ensures the Port of Seattle meets King County Discharge Permit restrictions and the
Port will not be in alignment with the All Known Available Reasonable Methods of Treatment
initiative.
This is not the recommended alternative.

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Alternatives
Alternative 2  Install four new analyzers
Cost Implications: $3,857,000 in capital is required.
Pros:
The IWTP will be able to segregate low level and high level contaminated wastewater and
discharge only the wastewater that requires treatment to Valley View Sewer District sanitary
sewers and to the King County South Wastewater Treatment Plant and thus reduce the fees paid
by the Port of Seattle for wastewater treatment.
The Port of Seattle remains in compliance with King County and Washington Department of
Ecology permits.
The Port of Seattle meets King County Discharge Permit restrictions and is in alignment with the
All Known Available Reasonable Methods of Treatment initiative.
Cons:
Requires a capital investment total of $3,857,000.
This is the recommended alternative.

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Appendix



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Improve IWS Segregation
High and Low Aircraft Deicer Concentration




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Cost Increase Detail



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