COMMISSION 
AGENDA MEMORANDUM                        Item No.          8e 
ACTION ITEM                            Date of Meeting      October 23, 2018 
DATE:     October 15, 2018 
TO:        Stephen P. Metruck, Executive Director 
FROM:    Jeffrey Brown, Director Aviation Facilities and Capital Programs 
Wayne Grotheer, Director, Aviation Project Management Group 
SUBJECT:  South Satellite (SSAT) Infrastructure Upgrades (CIP #C800798) 
Amount of this request:              $38,307,000 
Total estimated project cost:         $52,232,000 
ACTION REQUESTED 
Request Commission authorization for the Executive Director to: (1) increase the authorized
funds for the South Satellite Infrastructure Upgrades budget by the amount of $38,307,000; (2)
advertise, bid, and execute a major works construction project; and (3) use port crews and
small works contracts to assist with the project. The total estimated cost of this project is
$52,232,000.
EXECUTIVE SUMMARY 
This project will improve the effectiveness and reliability of the Heating, Ventilation, and Air
Conditioning (HVAC) system for the SSAT, a terminal that has seen dramatic passenger growth.
The scope of the work includes replacement and upgrade of the existing air handler and HVAC
system on the concourse level, ceiling, lights and associated electrical equipment, fire sprinkler
system, signage, portions of the terminal wide voice paging system, column cladding, and
carpet. This request is to authorize the construction and associated additional budget necessary
to complete this project. Commission authorized staff to proceed with the 90% design
development of this updated scope on June 26, 2018; the total estimated cost for this project
has not changed since this authorization.
The additional HVAC capacity will accommodate the expansion of the Airport Dining and Retail
(ADR) at the SSAT, providing needed customer amenities. Maintaining comfortable heating and
cooling is a basic necessity for a satisfying customer experience. While the Port is interested in 
undertaking a major renovation of the SSAT within the next 10 to 15 years, the inadequacy of
the HVAC system today and its risk of failure make this investment necessary. Equipment
installed as part of this project may not be compatible for the future SSAT renovation project
and the financial analysis for this project is based on this premise. 

Template revised April 12, 2018.

COMMISSION AGENDA  Action Item No. _8e_                                Page 2 of 8 
Meeting Date: October 23, 2018 

JUSTIFICATION 
The SSAT was constructed in 1971 and the core mechanical and electrical utilities of the original
concourse have remained largely unchanged since it was built. Demand on the mechanical
systems has approximately doubled since 1971, primarily from additional cooling load caused
by new electronic systems, increasing passenger traffic, and small facility additions.  Portions of
the HVAC Air Handler system failed recently due to age and condition. The outage during
equipment repairs caused a partial loss of cooling capacity in the SSAT for approximately six
weeks. 
Construction of this project was initially authorized on August 8, 2017. At that time, the scope
was limited due to plans to fully renovate the South Satellite in the next three to four years.
Since then, the decision was made to delay the full renovation of the satellite 10-15 years. In
February 2018, a single irregular construction bid of 180% of the engineer's estimatewas
received for the project and the solicitation was cancelled. Staff proceeded to identify
additional scope for the project to better address the needs of the facility over the next 10-15
years, improve constructability, and reduce risk to both the Port and contractor which should
make the project more attractive to potential bidders. Port Staff received Commission
authorization to proceed with the design of this new scope on July 10, 2018. The name of this
project has been changed from South Satellite HVAC Upgrade to South Satellite Infrastructure
Upgrades to better reflect the work being performed.
This project addresses the immediate operational needs at the SSAT and strives to minimize
scope that could be rendered obsolete by any future all-encompassing renovation project at
the SSAT. 
DETAILS 
This project will replace key components of a portion of the SSAT HVAC system. The project will
replace the constant volume air handler serving the Concourse level with a larger capacity and
more energy efficient variable air volume system and replace the obsolete distribution boxes
serving the concourse level. 
This project will replace the hot and cold deck fans, coils, and controls with an energy efficient
new air handler, coils, and controls. It will also install new ducting and diffusers to support
additional ADR requirements along with replacing the ceiling, lights and associated electrical
equipment, fire sprinkler system, signage, portions of the terminal wide voice paging system,
column cladding, carpet, and perform full RMM abatement on the concourse level.
Completion of this project will increase the heating and cooling energy efficiency approximately
15 to 20% on the SSAT concourse level system. Calculations estimate electric savings of 163,300
kwh/year on motor power and natural gas savings of 20,600 therms per year for heat for a total
energy savings of 26,168 therms and reduced  greenhouse gas emissions of  110 metric

Template revised September 22, 2016; format updates October 19, 2016.

COMMISSION AGENDA  Action Item No. _8e_                                Page 3 of 8 
Meeting Date: October 23, 2018 
tons/year. This represents a savings of approximately 0.2% of the total airport energy
consumption and 0.5% of the total airport greenhouse gas emissions. The new lighting will be
more energy efficient, replacing over 750 light fixtures, reducing energy consumption by over
50%. These efforts are in line with the Century Agenda goals to be the greenest and most
energy efficient port in North America. 
The old paraline ceiling will be replaced with a new metallic ceiling that will greatly improve the
aesthetics of the SSAT. The old ceiling is severely damaged, and the particular style is no longer
manufactured. 
In addition to the replacement of the old paraline ceiling, the project will install new lighting
and associated electrical equipment that is energy code  complaint and will improve the
aesthetic look of the concourse for passengers.
As part of replacing the ceiling the signage of the South Satellite will also be updated. Currently,
the signage is suspended from the paraline ceiling and this is an efficient time to replace the
signage. The new signage will improve the appearance of the concourse and better direct
passengers. To complement the new signage master plan, electricity will be provided to all signs
for LED lighting. 
The project will perform full Regulated Materials Management (RMM) abatement instead of
spot abatement; this increases the Expense budget by $3,033,000, for a total RMM expense of
$4,323,000. There are two reasons for conducting full RMM abatement in the plenum area of
the concourse: 
It removes the requirement for and future cost of conducting RMM abatement in
the future for this portion of the building. If only spot abatement was performed
now, and full abatement conducted in the future, e.g. for a full South Satellite
renovation,  substantial  additional  costs  would  be  incurred  to  perform  the
abatement. Abatement costs are rising at about 10 percent per year. 
Currently, RMM abatement is required just to enter the paraline ceiling, regardless
of the reason, this includes maintenance and inspections. Performing full abatement
will  remove  this  time  consuming,  intrusive  and  costly  requirement  allowing
maintenance staff easier access to vital pieces of infrastructure equipment. 
The current fire sprinkler system is almost 50 years old (installed in 1971). Per National Fire
Protection Association (NFPA) 25 directive, 10% of fire sprinkler heads are required to be tested
after 50 years. If a sprinkler head fails the test, all sprinkler heads in the area sampled must be
replaced. There is also a large portion of the fire sprinkler piping that is schedule 10 pipe, which
is thinner than schedule 40, which would be used today. Schedule 10 pipe failures in this and
other areas of the airport have highlighted the need to replace the thinner piping. Replacing the
aging system as part of the project removes the requirement to test the sprinkler heads. 


Template revised September 22, 2016; format updates October 19, 2016.

COMMISSION AGENDA  Action Item No. _8e_                                Page 4 of 8 
Meeting Date: October 23, 2018 
Carpet will also be replaced on the concourse as it is quite worn and in need of replacement.
The cost of replacing the worn carpet is about the same that it would cost to protect it with
plastic sheeting and plywood during construction. 
New, replacement equipment includes the following: 
1.  HVAC Air Handler 
2.  Cooling and Heating Coils and heating water piping 
3.  Controls and Variable Frequency Drives 
4.  Terminal Distribution Boxes 
5.  Diffusers 
6.  Motor Control Center 
7.  Light Fixtures 
8.  Electrical infrastructure for lights and signage 
9.  Fire Sprinkler System 
10. Signage 
11. Ceiling 
12. Carpet 
This project will: 
1.  Improve HVAC reliability 
2.  Provide additional HVAC capacity for concourse level areas and new tenant spaces 
3.  Improve energy efficiency 
4.  Facilitate maintenance 
5.  Replace obsolete equipment and infrastructure 
6.  Improve lighting throughout the SSAT 
7.  Improve  signage  from  the  STS  level  to  the  concourse  and  gates,  which  improves
passenger experience 
8.  Replace the aging and vulnerable fire sprinkler piping 
Small Business 
Aviation Project Management has been partnering with the Port's small business group to
ensure proper outreach via PortGen to small businesses and those owned by women and
minorities (WMBE firms). These activities range from email outreach and presentations, to
those businesses that may be interested in the opportunities this project presents. 
Schedule 
Activity 
Construction start                                2019 Quarter 1 
In-use date                                       2021 Quarter 3 


Template revised September 22, 2016; format updates October 19, 2016.

COMMISSION AGENDA  Action Item No. _8e_                                Page 5 of 8 
Meeting Date: October 23, 2018 
Cost Breakdown                                      This Request           Total Project 
Design Phase                                           $1,142,000            $3,029,000 
Construction Phase                                     $37,165,000           $49,203,000 
Total                                                        $38,307,000             $52,232,000 
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1  Cancel the project and continue to utilize the failed system. 
Cost  Implications:  $1,350,000  (expense  design,  capital  investment  for  communications
equipment relocation) 
Pros: 
(1)   Reduced capital expenditure 
Cons: 
(1)   This alternative does not provide a dependable indoor environment to facilitate airline
operations. 
(2)   This alternative would significantly degrade the quality of passenger experience at
Sea-Tac. 
(3)   This alternative would potentially lead to airlines insisting on processing departing
passengers in severely congested hold rooms on other concourses already being used
for other flights. 
(4)   This alternative does not provide reliable HVAC capacity (currently 30 percent under
capacity) for the increasing number of flights and additional tenant spaces. 
(5)   This  alternative  does  not  provide  capacity  for  any  additional  tenant  space
development. 
(6)   No capacity for the addition  of new airport dining and retail space, resulting in
reduced customer experience and Port revenues. 
This is not the recommended alternative. 
Alternative 2  Replace and upgrade the existing air handler and HVAC system (penthouse and
concourse level), replace the ceiling, lighting, sprinkler system, and signage on the concourse,
STS, and mezzanine levels, and above the escalators (not in the Federal Inspections Services or
International Corridor). Replace the carpeting on the concourse level and conduct full RMM
abatement wherever work is being performed. 
Cost Implications: $52,232,000 
Pros: 
(1)   This alternative provides dependable indoor environmental quality in all seasons for
the foreseeable future. 
(2)   This alternative improves the overall appearance of the SSAT, from the STS level to the
concourse, which is in line with the Century Agenda goal for making Sea-Tac the West
Coast "Gateway of Choice" for international travel. 

Template revised September 22, 2016; format updates October 19, 2016.

COMMISSION AGENDA  Action Item No. _8e_                                Page 6 of 8 
Meeting Date: October 23, 2018 
(3)   This alternative will provide the capacity for the existing (being remodeled) and new
tenant spaces. 
(4)   New signage will help passengers find where they are going easier. 
(5)   This alternative will improve energy efficiency in the HVAC system and will result in a
50 percent reduction in energy use for the lights. This alternative supports the Century
Agenda goal to "Be the greenest, most energy efficient Port in North America." 
Cons: 
(1)   This alternative has the highest capital investment 
(2)   This alternative has the longest construction timeline 
(3)   This alternative has the largest impact to operations with work being performed while
airline operations continue. 
(4)   Depending on when the full renovation of the SSAT occurs, the upgrades from this
project may only be used for 10 to 15 years. 
This is the recommended alternative. 
FINANCIAL IMPLICATIONS 
Cost Estimate/Authorization Summary               Capital        Expense           Total 
COST ESTIMATE 
Original estimate                                 $6,000,000        $150,000      $6,150,000 
Previous changes  net                         $41,909,000      $4,173,000     $46,082,000 
Current change                                         $0              $0              $0 
Revised estimate                              $47,909,000      $4,323,000    $52,232,000 
AUTHORIZATION 
Previous authorizations                         $12,635,000      $1,290,000     $13,925,000 
Current request for authorization               $35,274,000      $3,033,000     $38,307,000 
Total authorizations, including this request      $47,909,000      $4,323,000     $52,232,000 
Remaining amount to be authorized                    $0             $0             $0 
Annual Budget Status and Source of Funds 
The SSAT HVAC project (CIP #C800798) was included in the 2018-2022 capital budget and plan
of finance as a business plan prospective project with a total capital budget of $12,635,000 
(including the first cost increase of $6,635,000). The total cost increase, including a second one
of $35,274,000, totals $41,909,000.  This increase was transferred from the Aeronautical
Allowance (CIP #C800753), resulting in no net change to the Aviation capital budget. The
environmental remediation will be funded through the annual operating budget process. The
capital portion of this project will be funded with the Airport Development Fund and short-term
revenue bonds, recognizing that the improvements may have a life of 10  15 years. 

Template revised September 22, 2016; format updates October 19, 2016.

COMMISSION AGENDA  Action Item No. _8e_                                Page 7 of 8 
Meeting Date: October 23, 2018 
This project, with a budget of $10.4 million, was approved by the airlines through a Majority-in-
Interest (MII) vote on February 2017. The added scope and budget for this project as currently
proposed was presented to the airlines in May of 2018. A Majority-in-Interest ballot including
this cost increase is currently under review by the airlines.
Financial Analysis and Summary 
Project cost for analysis              $52,232,000 
Business Unit (BU)                  Terminal Building 
Effect on business performance    NOI after depreciation will increase 
(NOI after depreciation) 
IRR/NPV (if relevant)                N/A 
CPE Impact                        $0.36 CPE in 2022 
Future Revenues and Expenses (Total cost of ownership) 
This project replaces existing equipment that is old and dated. Regulated Materials Abatement
performed as part of this project will allow appropriate preventive maintenance  to be
performed on the equipment. This will increase O&M costs somewhat for this system. Aviation
Maintenance expects to be able to absorb this increase within current budget. The new system
will provide improved customer service and reliability.
No future revenues are anticipated as a result of the completion of this project. 
ATTACHMENTS TO THIS REQUEST 
(1)   Presentation slides 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
June 26, 2018  Commission approved the additional scope and authorized design at a cost
of $800,000 that was briefed on June 12, 2018. 
June 12, 2018  Commission was briefed on irregular bid and adding scope to the project to
reduce risk to the Port and Contractor. 
November 28, 2017  The Commission authorized $1,425,000 additional, for a total project
cost of $13,925,000. 
August 8, 2017  The Commission authorized $11,200,000 for the advertisement, bid, and
award the construction contract for the South Satellite HVAC Upgrade project. 
November 8, 2016  The Commission authorized $3,450,000 for the preparation of design
and construction bid documents, the advertising and execution of a major works
construction contract, and the utilization Port crews for the South Satellite Structural
Improvements (CIP C800818). 
July 24, 2012  The Commission authorized $6,500,000 for the redesign the SSAT HVAC
systems to meet current and future requirements. The design included adding an
additional  penthouse  system,  replacing  three  existing  systems,  reconfiguring  the

Template revised September 22, 2016; format updates October 19, 2016.

COMMISSION AGENDA  Action Item No. _8e_                                Page 8 of 8 
Meeting Date: October 23, 2018 
ductwork, and replacing all the distribution boxes. The 2012 estimated costs of these
improvements were about $37 million. The design effort was suspended in 2013 and
canceled in 2014 after staff determined that: 
(1) The SSAT would require a seismic upgrade to facilitate any new systems. 
(2) IAF and SAMP may change the use of SSAT. 
May 3, 2011  The Commission authorized the negotiation and execution of a professional
services contract for design services. No funding was associated with this authorization. 
September 22, 2009  The Commission was briefing on the condition of the HVAC systems
of the North and South Satellites. 















Template revised September 22, 2016; format updates October 19, 2016.