PORT OF SEATTLE 
CORRECTED COPY                  MEMORANDUM 
COMMISSION AGENDA             Item No.      6c 
ACTION ITEM             Date of Meeting   October 2, 2012 
DATE:    September 24, 2012  Corrected October 10, 2012 
TO:     Tay Yoshitani, Chief Executive Officer 
FROM:    Ralph Graves, Managing Director, Capitol Development 
Janice Zahn, Assistant Engineering Director 
SUBJECT:  Centralized Pre-Conditioned Air Project at Seattle-Tacoma International Airport 
MC-0316677
Amount of This Request:    $509,013.00     Total Project Cost: $44,125,000 
Source of Funds: Project Contingency and Airport Development Fund 
Est. State and Local Taxes: $3,035,141.13     Total Contract Cost: $35,541,364.37 

ACTION REQUESTED:
Request Commission authorization for the Chief Executive Officer to issue Change Order
No. 119 for Contract MC-0316677, Centralized Pre-Conditioned Air (PC Air) Project at Seattle-
Tacoma International Airport, in the amount of $509,013 for changes to the routing of piping at
the North Satellite Utility Tunnel and Mechanical Room. 
SYNOPSIS:
On September 13, 2010, the Port executed a construction contract for PC Air to Lydig
Construction. The bid documents identified two locations that would be used to access the North
Satellite tunnel for installation of the piping, noting that actual locations and sizes of openings
would be coordinated at a later date. After reviewing the indicated locations and performing a
survey of the actual tunnel location and dimensions, it was determined the specified locations
would not work. Working with the designer and contractor, the Port accepted a revised routing
that provided the required access. The new access points were more restrictive and resulted in a
longer route. Additionally, the hot water heat exchanger for the North Satellite also required
modifications to work with the high pressure steam at this location. The contract bid documents
indicated that a low pressure steam system existed in this location. As a result, additional
construction costs of $509,013 have been identified that were unknown at bid time.
A change order is required to compensate the contractor for additional costs due to insufficient
detail being provided on the contract documents to accurately bid the amount of work needed to

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
September 24, 2012  Corrected October 10, 2012 
Page 2 of 4 
install the necessary piping and heat exchanger. The total amount of the contractor's proposal
was $920,301, of which the Port acknowledges an undisputed amount of $509,013 to be issued
under Change Order No. 119. 
The construction contingency will be used to pay for this change order. No additional funds are
requested. 
BACKGROUND: 
The PC Air project will allow flight crews to turn off aircraft auxiliary engines and plug in to the
Airport infrastructure to receive both heated and cooled air. This will lower costs to the airlines
while producing significant environmental benefits by reducing the release of tens of thousands
of tons of carbon dioxide (CO2) emissions each year. This project is a cost-effective way to aid
the airlines while improving the quality of the environment. The airlines have approved funding
for this project, most of which will now be covered by the Federal Aviation Administration
(FAA) Voluntary Airport Low Emission (VALE) grant. The VALE grant is contingent on
completing the work within three years of grant approval. 
Lydig Construction was the low bidder with contract execution on September 13, 2010. The
original contract amount was $27,013,400.00 with a contract completion date of December 12,
2012. 
The contract design utilized tunnel access locations that were unusable and specified a low
pressure steam heat exchanger as opposed to high pressure steam available at that location. The
result of the final tunnel access points was a longer route and additional joints and modifications
to the heat exchanger to accept high pressure steam. 
CHANGE ORDER DESCRIPTION: 
The following information relates to the pending change order scope and cost: 
Change Order No. 119 
Scope of work: The contractor shall provide a revised heating water system for the North
Satellite and revised pipe routing for the North Satellite Utility Tunnel and Mechanical Room per
approved shop drawing 15010-017.01 for the total amount of $509,013. 
The change order is being issued unilaterally because the value of the change order is being
protested by the contractor. The remainder of the difference between the contractor's proposal
and this change order will be addressed as a disputed claim. 
JUSTIFICATION: 
Subsequent to the execution of the construction contract, it was discovered that the designed
routing did not include enough information for the contractor to properly bid the work. This

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
September 24, 2012  Corrected October 10, 2012 
Page 3 of 4 
included locations indicated for accessing the North Satellite Utility Tunnel. Working
collaboratively with the contractor, Port staff and design consultant agreed upon a new routing
that allowed the installation of the piping in the tunnel. This routing constitutes the lowest cost
and impact option to the project to complete pipe routing to the North Satellite. 
CONTRACT INFORMATION: 
The following information relates to the contract and competitive award: 
Contract award date:                         September 13, 2010 
Original period of performance:    September 13, 2010  December 12, 2012 
Previous contract extensions:                      37 Working Days 
Contract extension this change order:                       0 Days* 
Current Contract Completion Date:                 January 17, 2013 
FINANCIAL INFORMATION: 
Original contract amount:                        $27,013,400.00 
Previous Change Orders Executed:                   $4,158,544.00 
Current contract amount                         $31,948,854.00 
This request, Change Order No. 119                    $509,013.00 
Subtotal Construction Costs                       $32,457,867.00 
Anticipated sales tax @ 9.5%                        $3,083,497.37 
Revised Contract Amount                       $35,541,364.37 
*As there are multiple issues affecting the completion of the work, additional time may be
granted by separate change order after an analysis of whether this specific issue impacted the
project critical path and delayed the construction schedule. 
OTHER DOCUMENTS ASSOCIATED WITH THIS REQUEST: 
None. 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS: 
On January 13, 2009, the Commission authorized procurement and execution of service
agreements with consultants to perform design, prepare contract documents, and perform
contract administration for the Pre-Conditioned Air project at Seattle-Tacoma International
Airport in the amount of $3,770,000.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
September 24, 2012  Corrected October 10, 2012 
Page 4 of 4 
On May 11, 2010, the Commission authorized staff to advertise for bids, apply a Project Labor
Agreement (PLA), and authorize Port Construction Services to perform pre-construction work,
including moving tenants, for Phase I and Phase II of the PC Air Project (CIP # C800238) at the
Airport and execute a construction contract. This authorization was for $36,830,000. The
estimated total project cost is $40,600,000. 
On May 24, 2011, the Commission authorized execution of a $400,000 amendment to the
professional service agreement with Stantec Consulting. Total project funding authorization
remained at $40,600,000. 
On September 27, 2011, the Commission authorized a budget increase $3,525,000 to cover
additional costs to the construction budget, outside professional services and PMG soft costs.
Total project funding authorization increased to $44,125,000. 
On September 11, 2012 the Commission authorized execution of Change Order 113 in the
amount of $776,910 for changes to the pipe routing at D Concourse. Total project funding
authorization remained at $44,125,000.