PORT OF SEATTLE 
MEMORANDUM 

COMMISSION AGENDA             Item No.      6c 
Date of Meeting    March 31, 2009 
DATE:    February 27, 2009 
TO:     Tay Yoshitani, Chief Executive Officer 
FROM:    George England, Program Leader, Aviation Project Management Group 
Elizabeth Leavitt, Manager, Aviation Environmental Programs 
Richard Ottele, General Manager, Aviation Facilities and Infrastructure 
SUBJECT:  Perform design and construction of the North Snowmelt and North Cargo Pump
Station Improvements under the Adaptive Management phase of the
Comprehensive Stormwater Management Program (CSMP). 
ACTION REQUESTED: 
Request for authorization for the Chief Executive Officer, using previously authorized funds
under the CSMP, to complete design and contract documents; amend, execute, and award outside
professional services agreements for engineering and construction management; for Central
Procurement Office to advertise for and award the pre-purchase of equipment; for Port
Construction Services to advertise for bids, execute, and award Small Works construction
contracts; perform contract administration and execution; for the improvements to the North
Snowmelt and North Cargo pump stations for an estimated total project cost of $350,000. 
SYNOPSIS: 
The proposed project involves capital improvements to the North Snowmelt and North Cargo
pump stations located at the northeast corner of the airport, east of runway 16L/34R (east
runway). The improvements are intended to reduce the potential for pump station malfunctions 
to keep the flows moving to the Industrial Wastewater System plant for treatment rather than the
resulting overflows to a stormwater outfall regulated by the Airport's stormwater National
Pollution Discharge Elimination System (NPDES) permit. This project is necessary to gain
compliance with NPDES permit conditions. The proposed project will be implemented as an
element of the Adaptive Management phase of the Airport's CSMP. 
PROJECT DESCRIPTION AND JUSTIFICATION: 
The North Snowmelt and North Cargo pump stations were identified as facilities needed to meet
requirements of the Airport's NPDES permit issued by the Washington State Department of
Ecology (Ecology). The two pump stations are located in a drainage sub-basin at the northeast 
corner of the airport, east of runway 16L/34R. Both pump stations pump stormwater runoff into
the industrial wastewater system for treatment and discharge. However, if one or both of the

COMMISSION AGENDA 
T. Yoshitani, Chief Executive Officer 
February 27, 2009 
Page 2 of 6 

pump stations fail to operate properly, unintended overflows may occur at a stormwater outfall
regulated by the NPDES permit. Several pump system malfunctions occurred during 2008
storms resulting in three permit non-compliance conditions that required reporting to Ecology.
While no fines or penalties were levied by Ecology, the Port committed to evaluate the
malfunctions and to implement measures to reduce the probability of future non-compliance
conditions. 
Port staff investigated the pump station failures via a "root cause analysis" and identified several
corrective actions, including capital improvements and maintenance measures, which would 
enhance system reliability and work towards preventing future malfunctions and corresponding
overflows. As part of the reporting process to Ecology, the Port committed to implement all
corrective actions by October 15, 2009.
Previously the Port Commission authorized the entire CSMP, which included $12,400,000 for
the adaptive management phase of the program. Funding for this project request is included
within this previous authorization. The Aviation Maintenance Department will also perform
corrective maintenance measures estimated to cost approximately $5,000. Funding for this
maintenance work is within the annual approved expense budget and is not part of this request. 
Project Statement: 
Design and construct capital improvements to the North Snowmelt and North Cargo pump
stations, including an additional pump and wet well, enhanced telemetry, and associated civil,
mechanical, and electrical work, to increase system reliability by October 15, 2009 for a total
project budget of $350,000. 
Project Objectives: 
Increase reliability of the pump stations by providing pumping redundancy and enhancing 
operational monitoring systems, and enhancing the capability to respond quickly to potential
malfunctions, thus reducing potential future NPDES permit non-compliance conditions. 
PROJECT SCOPE OF WORK AND SCHEDULE: 
Scope of Work: 
The North Snowmelt pump station includes installation of an additional pumping unit and wet
well, water level sensor, an enhanced telemetry system and associated civil, mechanical, and
electrical site work. The North Cargo pump station includes installation of a water level sensor
and an enhanced telemetry system. The project design will be performed by Port Engineering;
however, if Port Engineering is not available then an outside engineer will be used. 
Project construction and construction management will be performed by Port Construction
Services (PCS) as a small works project. In order to meet the schedule, PCS plans to implement

COMMISSION AGENDA 
T. Yoshitani, Chief Executive Officer 
February 27, 2009 
Page 3 of 6 

the project using a combination of lump sum bid and for critical path items and selective use of
an open order contractor roster. 
In addition, long-lead items, such as the pump and other appurtenances may be pre-ordered as
owner-furnished equipment to allow the schedule to be met. 
Schedule: 
Design completion: May 15, 2009
Bid and award: May 16 to July 10, 2009 
Construction and commissioning: July 11 to October 15, 2009 
STRATEGIC OBJECTIVES: 
This project supports the following Port-wide strategies to exhibit Environmental Stewardship
through our Actions and become the cleanest and greenest most energy efficient in the world. 
The project also supports SeaTac Airport's Environmental strategies: 
Improve Water Quality: Implement stormwater best management practices to improve
stormwater runoff quality. 
Meet Environmental Obligations: The Port is obligated as a steward within the
community to comply with all environmental regulations. In addition, the conditions
within the 401 Certification and other permits are mandatory and must be complied with
as part of the implementation of the Master Plan Update. 
Monitor for Long-term Compliance (2002-2017): As a direct requirement of the 401
Certification and other permits, the Port is obligated to monitor stormwater quality and
quantity and ensure protection of local creeks.

COMMISSION AGENDA 
T. Yoshitani, Chief Executive Officer 
February 27, 2009 
Page 4 of 6 

FINANCIAL ANALYSIS: 
Capital Budget/Authorization Summary: 
The following capital budget and authorization summary is for CIP 102030, Comprehensive
Stormwater Management Program: 
Original Budget                               $5,125,000 
Budget Transfers                             $71,591,822 
Revised Budget                             $76,716,822 
Budget Reductions                          $(18,276,573) 
Current Budget                              $58,440,249 
CIP 102030 includes $12,400,000 for the Adaptive Management phase of
which approximately $164,000 has been expended to date for other
adaptive management efforts 
Previous Authorizations                         $78,853,027 
Authorization Transferred with Budget Transfers         $(2,136,205) 
Net Previous Authorizations                      $76,716,822 
Current Request for Authorization                         $0 
Total Authorizations                            $76,716,822 
Estimate of Remaining Budget to be Authorized               $0 

Project Cost Breakdown: 
Construction plus sales tax                           $200,000 
Design                                     $36,000 
Other                                      $114,000 
Total                                         $350,000 
Source of Funds: 
Airport Development Fund 03040.

COMMISSION AGENDA 
T. Yoshitani, Chief Executive Officer 
February 27, 2009 
Page 5 of 6 

Financial Analysis: 
CIP Category                                    Compliance 
Project Type                                     Environmental 
Risk adjusted discount rate                             Not Applicable 
Key risk factors                                     Not Applicable 
Project cost for analysis                                    $350,000 
Business Unit (BU)            Stormwater costs are allocated 86% to airfield
cost center and 14% to Landside 
Effect on business performance     NOI after depreciation for this project will be
positive due to recovery of 86% of the
operating and capital costs in the airfield cost
center through landing fees 
IRR/NPV                               Not Applicable 
CPE Impact                CPE will increase by less than $0.01 in 2010 
SUSTAINABILITY AND LIFE CYCLE COSTS: 
The annual operating costs of the pump stations are not expected to change significantly because 
of the project. They are expected to increase approximately $5,000 for the first year after
warranty expires and increase at a rate of 4% annually there after to cover increased wages,
benefits, and spare parts. Completing this project avoids long-term maintenance and regulatory
reporting costs by preventing pump failures, overflows, and inappropriate discharges. 
ALTERNATIVES CONSIDERED AND THEIR IMPLICATIONS: 
Alternative 1  Do not implement pump station improvements: The pump stations would remain
in their existing condition, additional system failures may occur in the future, stormwater
overflows may occur, and additional violations of the Stormwater NPDES permit may result.
The Department of Ecology could impose penalties for permit non-compliance. This alternative 
is not recommended. 
Alternative 2  Implement the pump station improvements as proposed: This alternative will
substantially increase system reliability, and minimize the chance of stormwater overflows and
permit non-compliance. This is the recommended alternative. 
TRIPLE BOTTOM LINE: 
The CSMP is driven by Port environmental stewardship, environmental regulatory requirements, 
and the mandatory conditions of the 401 Certification for the Master Plan Update and NPDES
402 Permit. The program provides a cost effective means of accomplishing necessary
environmental regulatory requirements. Facilities completed under this program provide an
overall benefit to the drainage basins, the community and the region by enhancing stormwater

COMMISSION AGENDA 
T. Yoshitani, Chief Executive Officer 
February 27, 2009 
Page 6 of 6 

detention and water quality that improves fish habitat and improves the ability for further
development within the Airport and the adjacent communities. 
BACKGROUND: 
The Comprehensive Stormwater Management Program (CSMP) was initiated in June 2002 in
response to permit conditions associated with the airport's Master Plan Update. Numerous
stormwater facilities were designed and constructed to meet regulatory requirements and are
currently operational. The stormwater program has now moved into its Adaptive Management
phase under which additional or upgraded stormwater facilities will be implemented to meet new 
regulatory conditions or to resolve other stormwater problems not previously anticipated. This 
project is part of the Adaptive Management phase. 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS: 
Previous Commission funding actions on CIP 102030 Comprehensive Stormwater Management
Plan include: 
On June 11, 2002, the Commission authorized $1,000,000 to conduct preliminary studies
and finalize program definition and planning for a new Comprehensive Stormwater
Management Program, CIP 102030. 
On March 11, 2003, the Commission authorized $9,354,000, which included: an
additional $4,125,000 for continuation of CIP 102030 Comprehensive Stormwater
Management Program Plan and Definition; $3,731,000 for initiating CIP 102108 Drives
Connection to IWS Project; $668,000 for initiating CIP 102109 Stormwater Pollution
Prevention Project; and $830,000 for initiating CIP 102146 Low Flow Pilot Program. 
On February 10, 2004, the Commission authorized $10,000,000 for continuation of CIP
102030, Comprehensive Stormwater Management Program Plan and Definition. 
On May 5, 2005, the Commission authorized $14,981,000 for continuation of CIP
102030, Comprehensive Stormwater Management Program Plan and Definition. 
On October 25, 2005, the Commission authorized $12,408,000 for continuation of CIP
102030, Comprehensive Stormwater Management Program Plan and Definition. 
On April 11, 2006, the Commission authorized an additional cost of $36,208,000 for
continuation of CIP 102030, Comprehensive Stormwater Management Program Plan and
Definition. Funding for Adaptive Management phase stormwater projects was authorized
by this action.