PORT OF SEATTLE 
CORRECTED COPY                  MEMORANDUM 
COMMISSION AGENDA             Item No.      5d 
ACTION ITEM             Date of Meeting  September 11, 2012 
DATE:    August 31, 2012  Corrected October 17, 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:    $776,910.00     Source of Funds: Project Contingency 
Est. State and Local Taxes: $3,035,141.13     Total Project Cost: $44,125,000 

ACTION REQUESTED:
Request Commission authorization for the Chief Executive Officer to issue Change Order
No. 113 for Contract MC-0316677, Centralized Pre-Conditioned Air (PC Air) Project at
Seattle-Tacoma International Airport in the amount of $776,910 for changes to the pipe routing
at D Concourse. 
SYNOPSIS:
On September 13, 2010, the Port executed a construction contract for PC Air to Lydig
Construction. During construction, the contractor identified many obstructions to the pipe
routing for Concourse D that were not addressed within the contract documents. In its submittals
for piping fabrication of Concourse D, the contractor proposed alternate pipe routings to avoid
obstructions, ease installation, and accommodate the building expansion joints not indicated on
the drawings. After reviewing the contractor's proposal, the Port approved the revised routings
as these routings provided equivalent performance at the lowest cost to the Port when compared
to the contract design shown in the bid documents. As a result, additional construction costs of
$776,910 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
install the necessary piping. The total amount of the contractor's proposal was $1,345,160, of
which the Port acknowledges an undisputed amount of $776,910 to be issued under Change
Order No. 113.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
August 31, 2012 
Page 2 of 4 
The construction contingency will be used to pay for this change order. While the project budget
is sufficient for now, staff intends to return to Commission later this year to request additional
authorization. 
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 had omitted many of the existing building details which required re-routing
many of the pipe runs. The Concourse D pipe routing is the longest and experienced the biggest
impact of all the concourses.
CHANGE ORDER DESCRIPTION: 
The following information relates to the pending change order scope and cost: 
Change Order No. 113 
Scope of work: The contractor shall provide a revised piping system at Concourse D per
approved shop drawing 15010-015.01 for the total amount of $776,910. 
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
included interferences where the pipe was to be installed along with missing building details.
Working collaboratively with the contractor, Port staff and design consultant agreed upon a new
routing which simplified the installation of the pipe. However omissions in the design regarding
building expansion joints required the addition of numerous pipe expansion joints and associated
appurtenances that were not in the original bid documents. This routing constitutes the lowest

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
August 31, 2012 
Page 3 of 4 
cost and impact option to the project to complete pipe routing to D Concourse (which eventually
feeds the North Satellite as well). 
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                         $31,171,944.00 
This request, Change Order No. 113                    $776,910.00 
Subtotal Construction Costs                       $31,948,854.00 
Anticipated sales tax @ 9.5%                        $3,035,141.13 
Revised Contract Amount                       $34,983,995.13 
*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. 
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,

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
August 31, 2012 
Page 4 of 4 
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.