PORT OF SEATTLE 
MEMORANDUM 
COMMISSION AGENDA               Item No.      4e 
ACTION ITEM 
Date of Meeting    September 8, 2015 
DATE:    August 24, 2015 
TO:      Ted Fick, Chief Executive Officer 
FROM:   Dave Soike, Director, Aviation Facilities and Capital Program 
SUBJECT:  Utility Agreement Grease Pick-up 
Amount of This Request:         $500,000   Source of Funds:   Airport Development
Fund 
Est. Total Cost:                $500,000 
ACTION REQUESTED 
Request Commission authorization for the Chief Executive Officer to execute a contract for
waste pumping services at Seattle-Tacoma International Airport. The total estimated value of
this request is $500,000 for a three-year contract.
SYNOPSIS 
The grease interceptors collect grease from the restaurant wastewater prior to entering the
airport's sanitary sewer system. Grease interceptor pumping and cleaning is required to prevent
grease blockages.  Blocked or full grease interceptors and sewage lines would result in sewage
overflows into the airport terminal. 
The frequency of servicing will be on an on-call basis.  Port staff monitors the grease
interceptors and determines when servicing is required. 
Seattle-Tacoma International Airport (Airport) utilizes 16 grease interceptors with a
combined capacity of approximately 430,000 gallons. 

BACKGROUND 
This work has been historically performed utilizing the Washington State Department of
Enterprise Services contract for Waste Pumping Services. Funding for this work is included in
the annual utilities expense budget as approved by Port Commission. Annual expenses are less
than $150,000 a year. The Airport currently utilizes the Washington State Department of
Enterprise Services (DES) contract number 07612 - Waste Pumping Services. The Port intends
to issue a competitive procurement to test the market and make certain the Port is attaining fair
and reasonable prices.


Template revised May 30, 2013.

COMMISSION AGENDA 
Ted Fick, Chief Executive Officer 
August 24, 2015 
Page 2 of 3 
PROJECT JUSTIFICATION AND DETAILS 
Grease Interceptor pumping and cleaning is required to prevent grease blockages.  Blocked or
full grease interceptors and sewage lines would result in sewage overflows into the airport
terminal. 
Scope of Work 
Sea-Tac Airport utilizes 16 Grease Interceptors with a combined capacity of approximately
430,000 gallons. These grease interceptors are serviced on an on-call basis. After pumping the
interceptors are pressure washed. 
Schedule 
The grease interceptors are serviced on an on-call basis.
FINANCIAL IMPLICATIONS 
Budget Status and Source of Funds 
The cost of grease interceptor pumping is included in the annual operating budget. As such , the
funding source is the Airport Development Fund. 
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1) Develop In-house grease pumping capabilities. Purchase the necessary pumping
equipment, hire, and train staff to service grease traps in-house. Training and start-up costs are
not included in the estimate below. This work would be infrequent for Port Staff (less than one 4
hr service call per week), so the Port would likely not have the efficiency or economies of scale
of a firm that specializes in this work. The estimate below does not include these inherent
inefficiencies and start-up costs. 
Cost Estimate: 
Amortized annual asset cost ($250,000 capital costs, Vactor Truck)             $34,000 
Annual maintenance on Vactor Truck (estimated)                       $15,000 
Waste Disposal Fees (429,000 gallons per year at $0.27/gal)                 $115,830 
Labor (46 service calls per year @ 4 hours/call @ $100.00/hr) 
This is an on-call service. Actual annual hours may vary.                  $18,400 
Total annual estimated cost                                       $183,230
Pros: 
Develop In-house capabilities 
Cons: 
Higher Cost 
This is not the recommended alternative.

COMMISSION AGENDA 
Ted Fick, Chief Executive Officer 
August 24, 2015 
Page 3 of 3 
Alternative 2)  Contract out for grease interceptor pumping and cleaning services to ensure
lowest possible pricing. Contract duration is three years.
Cost Estimate: 
Waste Disposal Fees (429,000 gallons per year at $0.27/gal)                $115,830 
Labor (46 service calls per year @ 4 hours/call @ $127.50/hr)               $23,460 
Total annual estimated cost                                      $139,290

Pros: 
Lowest cost. 
Ability to use on-call contractor, hours can be adjusted to meet the need. 
Cons: 
None. 
This is the Recommended Alternative 
ATTACHMENTS TO THIS REQUEST 
None. 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
None.