PORT OF SEATTLE 
MEMORANDUM 

COMMISSION AGENDA             Item No.      6c 
Date of Meeting    October 27, 2009 
DATE:    September 29, 2009 
TO:      Tay Yoshitani, Chief Executive Officer 
FROM:    Michael Ehl, Director, Airport Operations 
Paul Grace, Senior Manager, Airport Operations 
SUBJECT:  Request authorization to procure 29 low-floor, compressed natural gas shuttle
buses for transportation services between the Consolidated Rental Car Facility
and the Main Terminal at Seattle-Tacoma International Airport (Airport). 
ACTION REQUESTED 
Request Port of Seattle Commission authorization for the Chief Executive Officer to prepare
contract documents, advertise a request for proposals, and procure 29 low-floor, compressed
natural gas (CNG) shuttle buses for the estimated amount of $16,000,000 as a part of the total
Consolidated Rental Car Facility (CRCF) project cost of $419,306,000, bringing the total
authorized amount to $374,371,346 
SYNOPSIS 
This memorandum requests authorization to advertise for and procure 29 new CNG buses for
passenger transportation between the Main Terminal Baggage Claim/Arrivals level of the
Airport to the Customer Services Building on the 5th Floor of the CRCF. The number of buses
reflects the project goal to purchase a bus fleet with adequate capacity for a minimum of two
years past the spring 2012 opening date of the CRCF. The Commission has previously
authorized $358,371,346 for the following program elements: 1) Construction of the CRCF, 
2) Design of Off-Site Roadways, and 3) Design of the Bus Maintenance Facility. This
authorization will increase the project authorization by $16,000,000, for a total authorized
project cost to date of $374,371,346. Future authorization will be requested for construction of
the Off-Site Roads, Bus Maintenance Facility, and Main Terminal Improvements design and
construction. 
BACKGROUND 
Initial development of the Consolidated Rental Car Facility concept envisioned two alternatives
for transportation service between the Main Terminal and the Customer Service Building:

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
September 29, 2009 
Page 2 of 8 
1) Transit-type Shuttle Buses or 2) Automated People Mover. Cost analysis and ridership
projections based on Airport activity levels indicated that the transit-style bus is most cost
effective. 
Airport staff determined the magnitude of the bus purchase by combining real-world examples of
rental car shuttle bus operations at other airports with historical rental car data and growth
assumptions for Sea-Tac passenger demand. The analysis utilized the latest Airport passenger
activity forecast from July 2009. The Airport passenger forecast indicates a flat growth rate for
2010 and slight growth in the following years. Rental car passenger demand was forecast to 2014
based on the assumption there is a stable relationship between passenger demand and rental car
transactions. The table below summarizes the passenger forecast used for the fleet sizing analysis. 
Year       Growth Rate     MAP* Level 
2009          -4.5%          30.7 
2010           0%           30.7 
2011           1%           31.1 
2012          2.5%           31.8 
2013          2.7%           32.7 
2014          2.7%           33.6 
*Note: MAP refers to Million Annual Passengers 
Field data for existing rental car shuttle bus operations were collected at the following airports:
Phoenix, Las Vegas, Dallas/Fort Worth, and Baltimore. Dwell times, occupancy and bag counts
were combined with manufactures' specification data to complete a detailed peak-hour schedule.
Buses were assumed to accommodate 30 passengers per trip. Passengers were assumed to take 5
seconds per person to either board or alight the bus. Distance to the facility is 2 miles and
headways varied from 1 minute during the peak hour to a maximum of 5 minutes during the
lowest traffic (late night) times. 
The peak-hour scheduling exercise was extrapolated to future years based on the Airport's latest
forecast. The extrapolation analysis resulted in a forecasting tool that staff used to determine that
24 buses will be necessary for the new rental car shuttle bus operation. A maintenance factor was
included in the analysis to take into account the number of buses likely to be out of service due to
mechanical or technical problems. Combined with a maintenance rate factor of 20%, the resulting
analysis concluded that 29 buses will be necessary to begin service in March 2012 and provide
enough fleet capacity to operate through at least 2014. As part of the initial purchase, staff intends
to negotiate options for additional buses to meet future passenger activity levels. If necessary,
Port of Seattle employee buses could be utilized on a contingency basis to increase capacity. 
Recent conversations with bus manufacturers indicate bus production can range from 12 to 18
months, depending on the order. In the case of this purchase, fit-out activities would occur at the
manufacturer. Examples of the fit-out include application of the exterior bus graphic and
installation of Port of Seattle specific hardware such as digital voice recordings or driver cameras. 
Currently, bus delivery is scheduled for the fall of 2011. The analysis above has been shared with
the rental car agencies and has received their support.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
September 29, 2009 
Page 3 of 8 

PROJECT DESCRIPTION/SCOPE OF WORK 
Project Statement: Provide CRCF shuttle bus fleet capacity sufficient to meet demand for opening 
day of the CRCF plus two years based on the current Airport passenger growth forecast. 
Project Objectives: Provide reliable and environmentally friendly transportation service between
the Main Terminal and the CRCF Customer Service Building. 
Scope of Work: Procure 29 CNG, low-floor, transit-style buses in a perimeter configuration to
transport a minimum of 30 passengers and their luggage to and from the CRCF. The project will
provide funding for the procurement and fit-out of all buses including mechanical equipment,
interior finishes, exterior finishes, computerized diagnostic systems, and maintenance training. 
STRATEGIC OBJECTIVES 
The CRCF project, including the requested shuttle buses, supports the Port's strategy to "Ensure
Airport Vitality" and to "Exhibit Environmental Stewardship through our Actions." The RCF
program provides a long-term solution for rental car operations at the Airport. The CRCF busing
operation will be supported by a fleet of CNG-powered buses to minimize air emission impacts
caused by combustion equipment. 
FINANCIAL IMPLICATIONS 
Budget/Authorization Summary 
Original Budget                                            $17,327,000 
Budget Increase                                                   $0 
Revised Budget                                           $16,000,000 
Previous Authorizations                                              $0 
Current Request for Authorization                                 $16,000,000 
Total Authorizations, Including this Request                           $16,000,000 
Remaining Budget to be Authorized                               $1,327,000 
Cost Summary 
Description                Unit  Quantity  Unit Cost  Line Total     Total 
Bus Purchase 
Prepare RFP              LS     1     $100,000    $100,000 
Bus Purchase Price           EA     29     $400,000  $11,600,000 
Contingency                    16%            $1,856,000 
Sales Tax                       9.5%             $1,278,300 
Subtotal                                  $14,834,000

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
September 29, 2009 
Page 4 of 8 
Bus Fit-Out 
Bus Fit-Out (Radios, Digital     EA     29      $34,000    $986,000 
Voice Player, Cameras, etc.) 
Startup/Training             LS      1      $180,000    $180,000 
Subtotal                                   $1,166,000 
TOTAL ESTIMATED COST                          $16,000,000 
Source of Funds 
This project was included in the 2009-13 capital budget and plan of finance as a business plan
prospective project. The Customer Facility Charge (CFC) provides 100% of the funding for the
RCF shuttle bus purchase. The requested authorization is consistent with the original budget
developed for the RCF program and consistent with past presentations. Once procured, operation
and maintenance of the fleet will also be covered by CFCs. 
Financial Analysis 
CIP #                          800032 
CIP Category                    Capacity Growth 
Project Type                      Business Expansion 
Risk-adjusted Discount Rate            N/A 
Key Risk Factors                   Increased procurement costs due to market
conditions 
Project Cost Analysis                 $16,000,000 
Business Unit                      Landside  Rental Cars 
IRR/NPV                    N/A 
CPE Impact                    No impact due to CFC funding source 
Knowing that a rubber-tire type transit bus solution was necessary, Airport staff, in consultation
with the rental car industry, investigated the life cycle cost impacts and environmental
implications for various fuel types. Three bus types were explored: 1) Clean Diesel, 
2) Compressed Natural Gas, and 3) Hybrid Diesel Electric. A total cost of ownership analysis was
conducted using King County Metro records for hybrid and diesel buses and Port of Seattle
records for CNG buses. 

Clean Diesel    CNG    Hybrid Diesel Electric 
Initial Capital Costs          $315,000   $390,000            $530,000 
Annual Maintenance Costs     $17,500    $12,000            $7,500 
Annual Fuel Costs           $27,345    $28,037            $24,965 
NET PRESENT VALUE   $1,006,772  $1,000,489        $1,011,046

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
September 29, 2009 
Page 5 of 8 
The total cost of ownership between all types of bus varied by 1%. This result is inconclusive.
However, given the Port's familiarity with maintaining CNG buses and the established
environmental benefits associated with natural gas, Port staff recommended CNG-fueled buses for
the CRCF shuttle operation. 
ENVIRONMENTAL SUSTAINABILITY/COMMUNITY BENEFITS 
Air emissions from vehicles utilizing CNG are significantly lower than versions using gasoline or
diesel. Emission savings include: 35% nitrous oxides, 90% carbon monoxide and particulate
matter, and 25% carbon dioxide in comparison to fossil fuels such as diesel fuel or gasoline. 
TRIPLE BOTTOM LINE SUMMARY 
This project is budgeted with contingency and is expected to be at or below the authorized
amount. Air quality considerations were a major factor in choosing CNG technology for the bus
purchase. The Port currently operates a fleet of sixteen (16) CNG buses for its Employee Parking
operation and is satisfied with their long life and durability. The buses discussed in this request
will be built with similar material and handling specifications. 
PROJECT SCHEDULE 
Description/Task                Date 
Advertise Request for Proposals      December 2009 
Proposals Due                 January 2010 
Bus Manufacturer Selection         January 2010 
Negotiations and Execute Contract     February 2010 
Initial Delivery                   Fall 2011 
Operation                    March 2012 
PREVIOUS COMMISSION ACTION 
The following list of previous Commission actions or briefings are only related to the design and
construction of the RCF program and do not include the related property acquisition actions. 
February 9, 1998, the Commission authorized $2,125,000 for the solicitation and execution of
contracts for outside professional services for preparation of project analysis reports (PARs).
The RCF project is one of three projects that undertook the PAR process with a total budget of
$790,000. 
June 27, 2000, the Commission authorized $412,000 to complete post PAR pre-design and
project definition for the RCF project. 
March 27, 2001, the Commission authorized $3,500,000 for the completion of schematic
development for the RCF project. 
July 8, 2004, the Commission was briefed on the status of the RCF program. 
October 12, 2004, the Commission was briefed on the status of the RCF program.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
September 29, 2009 
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November 9, 2004, the Commission authorized $18,675,000 for the completion of facility
design for the RCF project, and for procurement of a GC/CM for the delivery of the project. 
May 24, 2005, the Commission heard the first reading and on June 14, 2005, the Commission
passed Resolution No. 3542 which imposed a CFC on customers of rental car companies
accessing the Airport for the purposes of financing, designing, constructing, operating, and
maintaining a consolidated RCF and common use transportation equipment and facilities, 
which are used to transport customers between the consolidated RCF and other Airport
facilities. 
January 9, 2007, the Commission was briefed on the status of the RCF program. 
February 27, 2007, the Commission authorized $9,210,183, including $6,460,183 in additional
design funding for the RCF program and $2,750,000 for preconstruction services and for
demolition of buildings on the RCF site. 
April 30, 2007, the Commission authorized $1,800,000 for a five-year Cost Advancement
Agreement for technical consulting services to support the Airport rental car concessionaires in
their deliberations with the Airport. 
June 12, 2007, the Commission authorized $870,000 in additional design funding for technical
consulting services to support the Airport Rental Car Concessionaires. 
January 22, 2008, the Commission was briefed on the reassessment of the RCF alternatives
and the status of the RCF program. The Commission imposed a moratorium of undefined
duration on the program. 
February 26, 2008, the Commission deferred action on the project and requested a Project
Management Plan be created. 
March 11, 2008, the Commission authorized $5,000,000, including $850,000 for additional
design funding for the RCF program and $4,150,000 for additional preconstruction services
and for preparation of the RCF site for construction. 
April 22, 2008 the Commission was briefed on the status of the RCF program. 
May 13, 2008, the Commission authorized 1) $3,574,300 in additional design funds for the
RCF program, 2) the award of the GC/CM contract to Turner Construction Company and
$286,500,000 for the construction of the RCF project, and 3) the execution of a change order
in the amount of $1,606,710 for additional construction staff and logistics facilities. 
June 3, 2008 the Commission authorized a Change Order exceeding $200,000 for the RCF
project. 
June 10, 2008, the Commission heard the first reading and on July 1, 2008, the Commission
passed Resolution No. 3599, which amends and restates Resolution 3542 and requires Port
staff to raise the CFC to satisfy all of the obligations of the Bonds. 
June 10, 2008, the Commission heard the first reading and on July 1, 2008, the Commission
passed Resolution No. 3600, which authorized the issuance and sale of special facility CFC
revenue bonds in series in the aggregate principal amount not to exceed $425,000,000 for the
RCF program.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
September 29, 2009 
Page 7 of 8 
June 24, 2008 the Commission was briefed on the status of the RCF program. 
August 5, 2008 the Commission authorized a Change Order exceeding $200,000 for the RCF
project. 
August 26, 2008 the Commission was briefed on the status of the RCF program. 
September 23, 2008 the Commission was briefed on the status of the RCF program. 
October 21, 2008, the Commission authorized the use of up to $20,000,000 in general Airport
funds to provide temporary funding for the RCF program. 
October 28, 2008 the Commission was briefed on the status of the RCF program. 
November 11, 2008 the Commission was briefed on the status of the RCF program and
authorized $552,000 for the ORI project for design and advance utility relocations. 
December 15, 2008 the Commission authorized the suspension of most work under the
contract for construction of the RCF project for an indefinite period, not to exceed one year.
Design for the BMF and ORI projects would continue. 
January 27, 2009 the Commission was briefed on the status of the RCF program and financial
markets. 
March 5, 2009 the Commission was briefed on the status of the financial markets and financial
plan options for the RCF program. 
May 12, 2009 the Commission was briefed on the proposed financial plan for the RCF
program. 
June 2, 2009, the Commission heard the first reading and on June 9, 2009, the Commission
passed Resolution No. 3619, which authorized the issuance and sale of revenue bonds in the
aggregate principal amount not to exceed $425,000,000 for the RCF program. 
June 2, 2009, the Commission heard the first reading and on June 9, 2009, the Commission
passed Resolution No. 3620, which authorized the issuance and sale of Subordinate Lien
Revenue Bond Anticipation Note in the principal amount not to exceed $100,000,000 for the
RCF program. 
June 2, 2009 the Commission authorized $607,000 for the BMF project for design of the CNG
Fueling Facility and the advance relocation of facilities. 
June 9, 2009, the Commission heard the first reading and on June 23, 2009, the Commission
passed Resolution No. 3621, which authorized the issuance and sale of CFC Revenue Bond
Anticipation Note in the principal amount not to exceed $100,000,000 for the RCF program. 
June 23, 2009 the Commission was briefed on the upcoming action request to lift suspension
and to restart the entire RCF program. 
June 30, 2009 the Commission authorized; 1) lifting the suspension and restarting the entire
RCF program, 2) an additional $591,670 design funds for the Bus Maintenance Facility (BMF)
and Off-Site Roadway Improvements (ORI), 3) an additional $27,826,000 construction funds
for the RCF and Main Terminal Improvements (MTI) projects, 4) executing multiple change

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
September 29, 2009 
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orders for the suspension/restarts costs and schedule impacts, and 5) a one-time change to
increase the cumulative total of all change orders from 10% to 18% for the RCF GC/CM Total
Construction Contract (TCC).