PORT OF SEATTLE 
MEMORANDUM 
COMMISSION AGENDA               Item No.      5c 
ACTION ITEM 
Date of Meeting     March 18, 2014 
DATE:    March 10, 2014 
TO:      Tay Yoshitani, Chief Executive Officer 
FROM:   Wayne Grotheer, Director, Aviation Project Management Group 
David Soike, Director, Aviation Facilities and Infrastructure 
SUBJECT:  Grease Interceptor Augmentation 2013 (CIP C#800551) 
Amount of This Request:        $1,304,700   Source of Funds:  Airport Development
Fund 
Est. Total Project Cost:          $1,559,200 
Est. State and Local Taxes:         $93,280 
ACTION REQUESTED 
Request Commission authorization for the Chief Executive Officer to advertise, award, execute, 
and construct a major works construction contract for the Grease Interceptor Augmentation
Project (CIP #C800551) at Concourse C and the South Satellite at the Seattle-Tacoma
International Airport in the amount of $1,304,700. 
SYNOPSIS 
This request is to install two underground 9,000-gallon grease interceptors to serve the South
Satellite, supplementing the Airport-wide system of grease interceptors. The Concourse C
locations will be served using the existing north CTE 9,000 interceptor. These new interceptors
will collect grease waste from existing and planned food/beverage units not currently served,
significantly reducing the risk of clogged sewer lines in the project areas. These new interceptors
and connections will also bring the Airport into compliance with the Uniform PlumbingCode 
and the Midway Sewer District for release of grease water waste.  This project was included in
the 2014  2018 capital budget. 
BACKGROUND 
Grease interceptors are underground holding tanks that remove grease from waste water before
the water is discharged into the sanitary sewer system. Greasy water moves from food service
units through drains via gravity. For waste water to drain to a grease interceptor, a continual
downhill slope must be maintained. Grease interceptors must be placed in appropriate locations 
for food service units to have the proper unobstructed slope required for drainage. The lack of
grease interceptors increases the risk of sewer line clogs that could significantly impact tenants
and Airport operations.

Template revised May 30, 2013.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
March 10, 2014 
Page 2 of 5 
This project anticipated installing one interceptor on Concourse C to serve existing and future
food beverage locations. During design the engineers found that there is not a good location on
the north side of Concourse C to place an interceptor and be able to get the slope needed to serve
any food beverage on the eastern portion of Concourse C. The engineering team looked for the
next option and found that they could achieve the slope needed to serve Beecher's and a future
food/beverage in the same area as Beecher's by going to the north CTE interceptor. This project
will provide the stainless steel piping from Beecher's (usable by the additional food beverage) to
the north CTE interceptor. It was also determined during design that sufficient slope could not
be reached at the south satellite to serve all underserved food beverage locations by installing
only one interceptor therefore two interceptors will be installed on the South Satellite.
In the early 2000s, the Airport began a comprehensive program to install grease interceptors at
various locations around the Airport to serve existing and future food service concessions. Due
to budgetary constraints, the program was only partially completed. Since that time, the Airport 
has installed new food service units not served by grease interceptors. 
PROJECT JUSTIFICATION AND DETAILS 
The expansion of food service units at the Airport has resulted in a lack of grease interceptor
coverage in certain areas, leaving the Airport at risk for interruptions to tenant and Airport
operations from sewer line clogs, as well as the resultant maintenance costs. Further, the current
arrangements of unserved food beverage units results in the Port being non-compliant with the
national Uniform Plumbing Code and the requirements of the Midway Sewer District, which
serves the Airport, for release of grease water waste. These conditions, coupled with plans for
future food/beverage units in areas not serviced by existing interceptors, require that the Port
install the proposed grease interceptors. The 9,000-gallon grease interceptors will have capacity
for current and future nearby uses. The units will be placed underground to avoid impact on 
aircraft operations. 
Project Objectives 
Provide for the hook-up to accessible grease interceptors for unserved existing as well
as future food/beverage locations at the Airport. 
Reduce the risk of sewer line clogs from grease water waste released into the sewer
lines, causing disruption to tenants and Airport operations as well as increased
maintenance costs. 
Make the Airport compliant with grease water waste discharge requirements of the
National Uniform Plumbing Code and the Midway Sewer District. 
Reduce the incidence of high levels of biological oxygen demand (BOD) in the sanitary
sewer system discharging to Midway Sewer District. 
Scope of Work 
The project will install two underground 9,000-gallon grease interceptors to serve unserved areas
South Satellite supplementing the Airport-wide system of grease interceptors. This project will

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
March 10, 2014 
Page 3 of 5 
install piping from the underserved food beverage locations on Concourse C to the existing north 
CTE interceptor.
Schedule 
Commission Authorization for Design                       May 2013 
Request Commission Authorization to Advertise, Execute and Construct  March 2014 
Construction Start                                       September 2014 
Project Complete                                     December 2014 
FINANCIAL IMPLICATIONS 
Budget/Authorization Summary              Capital     Expense   Total Project 
Original Budget                      $1,559,200          $0    $1,559,200 
Previous Authorizations                  $353,500          $0      $353,500 
Current request for authorization            $1,205,700          $0    $1,205,700 
Total Authorizations, including this request     $1,559,200          $0    $1,559,200 
Remaining budget to be authorized               $0          $0          $0 
Total Estimated Project Cost              $1,559,200          $0    $1,559,200 
Project Cost Breakdown                     This Request       Total Project 
Construction                                $928,910          $928,910 
Construction Management                     $108,500         $108,500 
Design                                       $0          $254,500 
Project Management                          $60,010         $159,010
Permitting                                   $15,000           $15,000 
State & Local Taxes (estimated)                    $93,280           $93,280 
Total                                     $1,205,700         $1,559,200 
Budget Status and Source of Funds 
This project was included in the 2014  2018 capital budget and plan of finance within CIP
#C800551. The funding source will be the Airport Development Fund. This project is
categorized as a non-aeronautical project as it exclusively supports the concessions business.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
March 10, 2014 
Page 4 of 5 
Financial Analysis and Summary 
CIP Category             Compliance 
Project Type              Terminal Infrastructure 
Risk adjusted discount rate     N/A 
Key risk factors             N/A 
Project cost for analysis        $1,559,200 
Business Unit (BU)          Terminal  Non-aeronautical 
Effect on business performance  NOI after depreciation will decrease 
IRR/NPV             N/A 
CPE Impact             None. 
Lifecycle Cost and Savings 
There will be annual operating and maintenance cost increases of approximately $7,500 to
regularly pump the new interceptors out. However, these costs may be partially offset by the
reduction of sewer district surcharges currently being assessed due to high BOD. Further, the
new interceptors will significantly reduce the risk of emergency expenses for cleaning sewer line
clogs. 
STRATEGIES AND OBJECTIVES 
This project contributes to the Port's Century Agenda objective of meeting the region's air
transportation needs at the Airport for the next 25 years. The project increases the capacity and
flexibility of tenant spaces. Allowing for additional food/beverage locations throughout the
Airport will better serve passengers and enhance customer service. The project demonstrates the
Port's commitment to being a good environmental steward for our partner the Midway Sewer
District by removing grease before waste water leaves the Airport. 
TRIPLE BOTTOM LINE 
Economic Development 
This project supports the growth of the Airport's food and beverage concessions business. 
Environmental Responsibility 
Installing interceptors will capture the grease that would otherwise be routed to a treatment plant.
The grease pumped from interceptors will be trucked to a materials recycling facility and
processed for use as a biofuel. Over the lifecycle, capital costs are at least partially offset by
savings in surcharges and maintenance of clogged sanitary sewers. This project demonstrates
environmental sustainability by improving existing Port assets and looking at the total cost of
ownership. The project aligns with the Port's goal of improving the long-termsustainability of
its facilities and operations.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
March 10, 2014 
Page 5 of 5 
Community Benefits 
This project supports the Airport's strategic goal of operating a world-class international airport
by anticipating and meeting the needs of our tenants, and passengers; and managing our assets to
minimize long-term total cost of ownership. Installing grease interceptors will protect the Port's
sanitary sewer lines from the harmful effects of grease, anticipate future need, and decrease
surcharge fees. The project manager and Central Procurement Office will coordinate with the
Office of Social Responsibility to determine opportunities for small business participation in
support of Resolution No. 3618. 
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1)  Install individual grease traps in food preparation area drain lines. Grease traps
capture a small amount of the grease that passes through them. Significant time and expense for
frequent cleaning is required to ensure that the traps are free from clogs and work effectively.
This is not the recommended alternative. 
Alternative 2)  Do nothing. The result of doing nothing would be grease build up in sewers
leading to blockages and increasing maintenance costs and increased surcharges by the local
sewer district. This is not the recommended alternative. 
Alternative 3)  Install grease interceptors and connections to existing grease interceptors at
locations where there are food service units not connected to grease interceptors to fully serve
the current and anticipated concessions footprint. This is the recommended alternative. 
ATTACHMENTS TO THIS REQUEST 
Grease Interceptor Map 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
On May 28, 2013, Commission authorized design funds for the Grease Interceptor
Augmentation Project.