Source: http://www.airportsites.net/SEA-Part150/questions.htm
Timestamp: 2013-06-19 16:44:11
Document Index: 682532792

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Frequently Asked Questions What is a Part 150 Study?
How do I comment on the study?
To provide mitigation measures that are sensitive to the needs of the community; To minimize the impact of mitigation measures on local tax bases; and
top of page How long will the Part 150 Study take to complete?
top of page What is the purpose of noise monitoring? Field measurements from the airport's permanent monitoring system and the temporary monitors established as part of the study have been collected for use in the study. The measurements were compared with pre-existing database information related to aircraft noise level and performance characteristics in the FAA's Integrated Noise Model. The information collected during the measurement program included acoustical output, as measured at known locations, as well as flight trajectory data (the aircraft's three-dimensional location) relative to the noise measurement site. This information was used to ensure that the input data into the Integrated Noise Model was as accurate as possible.
top of page What is the Integrated Noise Model?
top of page What is DNL?
top of page What are Noise Exposure Maps (NEM)?
top of page How do I comment on the study?
Comments may be made in person during the May 15 Open House / Public Hearing, or by submitting written comments no later than May 30, 2013 to:
Rob AdamsPart 150 Project ManagerLandrum & Brown11279 Cornell Park Dr.Cincinnati, Ohio 45242
top of page Since the third runway opened, have operations on the runway been more frequent than anticipated?
top of page Under what set of circumstances are aircraft expected to use the third runway?
top of page Can Sea-Tac Airport restrict operations on its runways?
top of page Where does the Port of Seattle receive funding for noise mitigation projects?
top of page What type of noise mitigation projects can the Port of Seattle spend funds on?
top of page Can the Port of Seattle use tax levy funds for noise mitigation projects?
top of page What noise mitigation efforts has the Port already undertaken?
top of page What set of circumstances makes noise reduction efforts for residents around Sea-Tac Airport a challenge?
top of page Is Sea-Tac Airport getting quieter due to improved aircraft technology?
top of page What results can the communities around Sea-Tac Airport expect from the new Part 150 process once it is complete?
The current Part 150 Study, Sea-Tac's fourth, began in November 2009. As part of their work, the consultants have developed new noise maps showing how the airport's overall noise affects the community now and in the future. They have conducted a wide-ranging review of all of the airport's noise reduction efforts and an evaluation of new ways to improve upon the efforts. Through the public workshops, the public helped to identify and shape the noise reduction recommendations that are included in the Draft Part 150 Study. The Port has been committed to a thorough and accessible public process throughout the Part 150 Study that continues to ensure there are multiple avenues for involvement and public comment. Click here for information on how to comment on the Draft Part 150 Study recommendations.
top of page How can I get involved with the Part 150 Study as it progresses and where can I find information?
A series of public workshops have been held at key milestones during the Part 150 Study. Open to all, each workshop was designed to make it easy for the public to provide input, ask questions and offer recommendations in a more personal setting. The fifth and final workshop will be held in conjunction with a Public Hearing on May 15, 2013 to accept comments on the Draft Part 150 recommendations. Click here for additional information on this meeting. To keep up-to-date throughout the Part 150 process, sign up to receive email updates on the Port's website.
top of page What happened with the recommendations from the last Part 150 Study?
Conduct a siting/feasibility study for a ground run-up enclosure (GRE/hush house). The Port of Seattle
completed a feasibility study in 2001, but since then a recommended site could not be finalized because of some serious airfield planning issues adjacent to the area that was designated for a future GRE. A GRE should be located in close proximity to the aircraft maintenance facilities of an airport's primary air carriers. The GRE has been reviewed again as part of the current Part 150 Study and is recommended for construction pending FAA approval.
These recommendations have been implemented. Ground run-ups are prohibited between midnight and 7 a.m., and if absolutely necessary, can only be conducted with approval from the airport and only if no longer than two minutes in duration. Airlines get a warning for the first violation and are fined $1,000 for the second violation. This fine doubles for each repeat violation within a 12-month timeframe. Install sound reduction measures (insulation and sound-dampening windows) in all schools within the 65 DNL.
Insulation and sound rated windows were installed in all 5 of the condominium complexes, with a total of 260 units. This work was completed in 2008. Purchase mobile home parks within the 70 DNL noise contour. This program was completed in 2009. The Port of Seattle acquired 5 mobile home parks with a total of 359 mobile homes units. Owners of those homes were relocated with financial and advisory assistance from the Port. Purchase residential properties experiencing noise levels of 65 DNL or greater located within the Approach Transition Zones (ATZ) of the proposed third runway. Completed in 2010, all residential parcels within the third runway's North ATZ
have been purchased, for a total of 69 homes, and these homeowners have been relocated with financial and advisory assistance from the Port. A re-evaluation of the third runway's South Approach Transition Zone has been conducted as part of the current Part 150 Update. There are sixteen single-family residences and
six apartment buildings remaining in the South ATZ that are eligible for voluntary acquisition.
Use Flight Management System (FMS) to better manage airline flight tracks. FMS is a computer system onboard aircraft that enables pilots to fly more precise routes. This, in turn, provides air traffic controllers with the ability to better manage flight tracks of incoming and outgoing aircraft. Following the 2002 Part 150, FMS departure procedures have been developed by the FAA for use of the Elliott Bay corridor and are routinely assigned to pilots.