PORT OF SEATTLE 
MEMORANDUM 
COMMISSION AGENDA 
STAFF BRIEFING 
Item No.        7a 
Date of Meeting    October 2, 2012 
DATE:    September 25, 2012 
TO:     Tay Yoshitani, Chief Executive Officer 
FROM:    Stan Shepherd, Manager Airport Noise Programs 
SUBJECT:  Part 150 Aircraft Noise and Land Use Compatibility Study Update 
SYNOPSIS: 
Today's Commission update will provide information about progress being made on the
Part 150 Study. The Part 150 Study is designed to identify significant existing and future
noise impacts to areas surrounding Sea-Tac Airport and recommend actions to address
those impacts. 
In early 2013, the Commission will be asked to approve a set of Part 150
recommendations before the Study is forwarded to the Federal Aviation Administration
(FAA) for review and final approval. Once the FAA approves the Noise Compatibility 
Plan, which is anticipated to be in the fall of 2013, Port staff can begin working on a 
prioritization and implementation plan with an associated budget to present to
Commission. Staff will also work with the Office of Social Responsibility to follow
federal Disadvantaged Business Enterprise (DBE) guidelines to allow for small business
opportunities.
HISTORY: 
The Part 150 Study began in late 2009. The Commission has been briefed five times on
the study in public session, providing numerous opportunities for public input. To date, 
there have been four large-scale public outreach events: February 24, 2010, in Des
Moines; June 9, 2010, in Burien; October 27, 2010, in Des Moines; and April 9, 2011, at
Sea-Tac Airport. All past outreach events were well attended and designed for maximum
public involvement.
Staff offered on several occasions to provide Part 150 information to city councils and
other interested groups within the communities of Southwest King County. A number of
community leaders took advantage of the offer including Federal Way City Council, 
SeaTac City Council, Des Moines City Council, City of SeaTac Hotel/Motel Committee,
Highline School District, Burien City Council and Normandy Park City Council.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
September 25, 2012 
Page 2 of 6 
Members of the study team also met with community-based organizations and elected
stakeholders at the local, state and federal levels.
Other community involvement efforts: 
Provided periodic briefings to the Highline Forum to ensure that elected leaders in
communities surrounding the Airport were kept informed and had the ability to
offer input throughout the process. To date, there have been eight briefings at the
Highline Forum. 
Hosted six Technical Review Committee meetings where the study team solicited
feedback on technical issues related to the study. The Technical Review
Committee is comprised of land-use planners from local airport communities and
representatives from the FAA, Puget Sound Regional Council, Boeing Field,
Washington State Department of Transportation, and Alaska and Horizon
Airlines.
Provided a special data review session for the public to ask questions specifically
about noise metrics used in a Part 150 Study. 
A final public session, which will be combined with a public hearing, is planned for early
2013. The goal of this event will be to formally gather public comments on the draft set
of Part 150 recommendations and to address any questions. This will be accomplished
through an informational session where the Part 150 consultant and Port staff will
answer questions and gather input. There will also be a separate public hearing following
the informational session, where the public can formally comments for the record, either
orally or in writing. 
PART 150 STUDY UPDATE: 
Noise Contour Evaluation 
The Day Night Level (DNL) noise contours are in the process of being updated to reflect
current aircraft operations and a five-year forecast. 
Noise Remedy Boundary Maps 
In order to reflect the updated noise contours, the proposed Noise Remedy Program
Boundary, which defines where insulation can potentially occur, is being revised. If
approved by the FAA, the revised Noise Remedy Program Boundary will define where
the Port may pursue FAA grants for noise mitigation. The newly revised boundary is
smaller than the current boundary, which was established in 1985. The change in the size
of the area within the Noise Remedy Program Boundary (Noise Remedy Area) is mostly
due to a significant decrease in the geographic area projected to experience noise levels at
or above 65 DNL in 2018. DNL noise contours are based on the yearly average of noise

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
September 25, 2012 
Page 3 of 6 
produced from all arriving and departing aircraft. The updated contours are smaller due
to the introduction of newer and quieter aircraft and fewer operations than previous years. 
Preliminary Recommended Noise Mitigation Options 
Port staff and the Part 150 consulting team have reviewed stakeholder input gathered
during the Part 150 Study process. Options that are considered feasible for having a
potential noise reduction benefit for the communities around Sea-Tac Airport will be
carried forward for further evaluation.
If any of these options are approved by the FAA, they could potentially be funded by
Airport Improvement Program (AIP) Grants at approximately 80%. Port staff will
prioritize them for Commission consideration, based on several criteria. The decisionmaking
criteria includes: 
noise reduction significance; 
funding eligibility; 
availability of Airport revenue and FAA grants; 
whether significant progress can be accomplished within a reasonable amount of
time since Part 150 programs typically span a five year timeframe. 

The following noise mitigation options represent the anticipated Part 150
recommendations to be submitted to the Commission for authorization:
Single Family Homes Sound Insulation  Continue offering sound insulation to
eligible homes within the revised Noise Remedy Program Boundary; 
Air Conditioning  Include air conditioning as part of the standard insulation
package for single family homes within the revised Noise Remedy Program
Boundary that have not been previously insulated. Homes that have already
received an insulation package will not be eligible for additional air conditioning; 
Multi Family Owner-Occupied Sound Insulation  Offer sound insulation to
eligible multi-family, owner-occupied residences (condominiums) inside the
revised Noise Remedy Program Boundary; 
Multi-Family Tenant-Occupied Sound Insulation  Offer sound insulation to
eligible apartment buildings inside the revised Noise Remedy Program Boundary; 
Ground Run-up Enclosure (GRE) Feasibility Study - A GRE is a large three-
sided structure within which aircraft can perform required engine testing, thereby
resulting in a quantifiable noise reduction impact on the surrounding
communities. The consulting team is evaluating potential locations for a GRE on 
the airfield.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
September 25, 2012 
Page 4 of 6 
Mobile and Manufactured Homes Avigation Easements  Offer to purchase
avigation easements for mobile and manufactured homes on private land within
the revised Noise Remedy Program Boundary; 
South Approach Transition Zone (ATZ) Voluntary Buy-outs  Voluntarily
offer to purchase residential properties experiencing noise levels of 65 DNL or
greater in the South ATZ of the Third Runway and offer relocation benefits. If
acquired, the parcels must be used in the future as commercial/industrial land, or
other compatible, non-residential uses; 
Church Sound Insulation Feasibility Study  Initiate a sound insulation study
to evaluate the noise levels at churches located within the revised Noise Remedy
Program Boundary. 
NEXT STEPS: 
We anticipate presenting a resolution for Commission consideration in early 2013.
What follows is a proposed schedule to complete the Part 150 Study. The dates may be
adjusted, based on issues related to time required for FAA reviews and potential
revisions. 
2012 
Prepare a preliminary draft Noise Compatibility Plan (NCP), which includes draft
recommendations ( in progress) 
Submit preliminary draft Part 150 Study to the FAA for review (October) 
Host a Technical Review Committee meeting (November) 
Brief Commission on draft NCP (December) 
2013 
Publish draft Part 150 and begin 45-day public comment period (1st Quarter) 
Host the final public outreach event including a formal public hearing (1st 
Quarter) 
Prepare any state environmental documentation needed based on proposed NCP 
(1st Quarter) 
Brief Commission on public outreach event and final NCP (2nd Quarter) 
Present Commission with a resolution to adopt NCP (2nd Quarter) 
Prepare final NCP to be submitted to the FAA (2nd Quarter)

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
September 25, 2012 
Page 5 of 6 
CONSULTANT CONTRACT FINANCIAL IMPLICATIONS: 
Original contract amount: $1,361,486 
Contract amendment for long range forecast and contour: $20,994 
Contract amendment for additional Ground Run-up Enclosure work: $26,500 
Contract amendment for delay and extension of contract: $57,468 
Total contract amount with amendments $1,466,448 
Cost to date $1,186,756 
Amount remaining on contract: $279,692 
Estimates for 2012: $174,692 
Estimates for 2013: $105,000 
Reimbursements to date from FAA grant: $949,404 
OTHER DOCUMENTS ASSOCIATED WITH THIS BRIEFING: 
PowerPoint Presentation 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS: 
August 17, 2011  Part 150 Briefing and Policy Roundtable with Mayors (or their
representatives) from Burien, Des Moines, Federal Way, Normandy Park, SeaTac
and Tukwila. 
June 28, 2011  Part 150 Noise and Land Use Compatibility Update Briefing
held in Federal Way. 
October 26, 2010  Part 150 Noise and Land Use Compatibility Update Briefing. 
June 22, 2010  Part 150 Noise and Land Use Compatibility Update Briefing. 
March 23, 2010  Part 150 Noise and Land Compatibility Study Update held in
Normandy Park. 
February 23, 2010  Part 150 Briefing and Policy Roundtable with Mayors (or
their representatives) from Burien, Des Moines, Federal Way, Normandy Park,
SeaTac and Tukwila. 
November 23, 2009  Authorization for the Chief Executive Officer to update the
Part 150 Noise Compatibility Plan for an overall approximate cost of $2.5 million,
representing an increase of $1.5 million over the previously authorized amount.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
September 25, 2012 
Page 6 of 6 
June 23, 2009  Authorization for the Chief Executive Officer to procure and
execute a contract for consultant services to implement an update to the Part 150
Noise Compatibility Plan for an estimated cost of $500,000 to $1.0 million.