Item No.:                    6a_supp 
Meeting Date:           October 7, 2014 
PreConditioned Air (PC Air)

Background 
What: 
PC Air project installed a system of
chillers, heaters, and pipes that
provide both the heating and cooling
to the aircraft from a central plant at
the Airport 
Why: 
Environmental Benefit: 
Aids in the elimination of carbon dioxide
generated by the aircraft APUs
equivalent to about 8,000 cars on the
road, or 40,000 metric tons of
greenhouse gases 
Economic Benefit: 
The benefit to the airlines is the
potential annual savings of 5 million
gallons of jet fuel

Design Schedule 
Original          Actual 
Start: 06-03-2009         07-19-2009 
Finish: 05-10-2010        05-10-2010 
FAA Grant application deadline required Notice to
Award by September 13, 2010 
Design schedule accelerated by 6 weeks to meet
FAA deadline for a ~ $22M grant 
Result, went out to bid with design about 80% 
Additional Project cost $14,540,643

Construction Schedule 
Notice of Award      09/13/2010 
Notice to Proceed     11/05/2010 
Original completion    12/11/2012 
Actual completion    05/16/2014 
Completion delayed by issues with piping
design

Budget 
May 2010   $40,600,000  Payback 1.4 years* 
Sept 2014   $55,140,463   Payback 2.4 years* 
*Payback calculated on total Port costs excluding $21.9 million grant. 
Cost growth 
Regulated Materials     $ 500,000 
Scope changes        $ 3,500,000 
Errors & Omissions      $ 9,000,000 
Schedule Impacts      $ 1,540,463 
Contractor's extended Overhead 
Additional Port soft costs

This request 
Final Change Order from Contractor 
Chilled Water Piping 
Concourse A piping insulation and anchors and
guides (Scope Change) 
Concourse B, C and South Satellite anchors and
guides (Replacement) 
Complete 4 gates (S-3, S-16, D-1, and N-6)

Unfinished Gate N-6

Typical Finished Gate

Solid Guide Illustration 
Installed on Concourse A, B, C and South cold water legs

Frosty Pipe Guide 
The problem with solid connection on cold water lines

Insulated Anchor Illustration 
Recommended to fix icing issue on Concourse A, B, C and South cold water legs

Insulated Pipe Anchors 
No ice

Conclusion 
Justification for project still valid. Positive
Return on Investment, and rapid payback 
Winner of AGC 2014 Build Washington and
ENR Airports/Transit Best Project Awards 
20 degree chilled water piping requires
insulated anchors and guides 
Cost of omissions are project costs