1. DRAFT Noise Exposure Maps (NEMs) Years 2017 and 2022
Public Information Workshop
October 12, 2017

2. Introductions Tom Nissalke Walter Vinson Carrol Fowler
Director of Planning and Environmental
Walter Vinson
Public Program Coordinator
Carrol Fowler
Consultant, KB Environmental Sciences, Inc.

3. Objectives of This Presentation
Describe what are Noise Exposure Maps (NEMs)
Explain why the Year 2017/2022 NEMs were prepared
Provide an overview of airport operations
Summarize historical efforts by the DOA to address land uses that are not compatible with aircraft noise
Discuss the Federal Aviation Administration’s (FAA’s) requirements and methodologies that were used to prepare NEMs
Present the Draft NEMs
Disclose the agency/public involvement efforts to date
Inform you how to provide your comments on the Draft NEMs

4. Hartsfield-Jackson Basics
ATL is the world’s busiest airport
CY2017, approximately:
889,900 take-offs and landings
105 million passengers
610 thousand metric tons of cargo
City of Atlanta owns ATL; it’s Department of Aviation (DOA) operates the airport

5. Hartsfield-Jackson Basics (continued)
Imagery Date: March 31, 2017

6. What is an NEM?
NEMs are scaled depictions of an airport, the airport’s aircraft noise contours and the land uses surrounding the airport that are considered to be noncompatible with aircraft noise

7. Why Were Year 2017 and 2022 NEMs Prepared?
The FAA requests that airport sponsors that have a Noise Compatibility Program update an airport’s NEMs approximately every five years
The 2017/2022 NEMs for ATL will replace the NEMs that were previously determined to be in compliance with Title 14, Part 150 of the Code of Federal Regulations (14CFR150)

8. Land Uses That Are Noncompatible With Aircraft Noise
Noncompatible land uses are uses that are either normally noncompatible with the outdoor noise environment or uses that are not adequately attenuated (i.e., reduced) for indoor activities
Without proper attenuation methods, in aircraft noise contours of YDNL 65 dB or more, noncompatible land uses include:
Residences
Schools
Hospitals
Nursing homes
Churches
Land use
YDNL (expressed in dBA)
Below 65
65–70
70–75
75–80
80–85
Over 85
Residential
Residential, other than mobile homes and transient lodgings Y
N(1) N
Mobile home parks
Transient lodgings
Public Use
Schools
Hospitals and nursing homes 25 30
Churches (i.e., places of worship), auditoriums, and concert halls
Governmental services
Transportation
Y(2)
Y(3)
Y(4)
Parking
Commercial Use
Offices, business and professional
Wholesale and retail—building materials, hardware and farm equipment
Retail trade—general
Utilities
Communication
Manufacturing and Production
Manufacturing, general
Photographic and optical
Agriculture (except livestock) and forestry
Y(6)
Y(7)
Y(8)
Livestock farming and breeding
Mining and fishing, resource production and extraction
Recreational
Outdoor sports arenas and spectator sports
Y(5)
Outdoor music shells, amphitheaters
Nature exhibits and zoos
Amusements, parks, resorts and camps
Golf courses, riding stables and water recreation
SLUCM=Standard Land Use Coding Manual. Y (Yes) = Land Use and related structures compatible without restrictions. N (No) = Land Use and related structures are not compatible and should be prohibited. NLR = Noise Level Reduction (outdoor to indoor) to be achieved through incorporation of noise attenuation into the design and construction of the structure.
25, 30, or 35=Land use and related structures generally compatible; measures to achieve NLR of 25, 30, or 35 dB must be incorporated into design and construction of structure.
(1) Where the community determines that residential or school uses must be allowed, measures to achieve outdoor to indoor Noise Level Reduction (NLR) of at least 25 dB and 30 dB should be incorporated into building codes and be considered in individual approvals. Normal residential construction can be expected to provide a NLR of 20 dB, thus, the reduction requirements are often stated as 5, 10 or 15 dB over standard construction and normally assume mechanical ventilation and closed windows year round. However, the use of NLR criteria will not eliminate outdoor noise problems.
(2) Measures to achieve NLR 25 dB must be incorporated into the design and construction of portions of these buildings where the public is received, office areas, noise sensitive areas or where the normal noise level is low.
(3) Measures to achieve NLR of 30 dB must be incorporated into the design and construction of portions of these buildings where the public is received, office areas, noise sensitive areas or where the normal noise level is low.
(4) Measures to achieve NLR 35 dB must be incorporated into the design and construction of portions of these buildings where the public is received, office areas, noise sensitive areas or where the normal level is low.
(5) Land use compatible provided special sound reinforcement systems are installed.
(6) Residential buildings require an NLR of 25.
(7) Residential buildings require an NLR of 30.
(8) Residential buildings not permitted.
Note: 65 dB is generally identified as the threshold level of aircraft noise which is significant.
Table 1 of 14CFR150

9. What is a YDNL?
Aircraft noise is represented with a sound level metric referred to as a day-night sound level (DNL)
DNLs are 24-hour sound levels in decibels (dB) for which a ten dB penalty is applied to each sound level event between 10:00 p.m. and 7:00 a.m.
A YDNL is a 365-day (i.e., annual) average of daily DNL values
Note: In this example, there are 27 operations between
6 a.m. and 7 a.m. With the nighttime penalty applied,
270 operations are modeled.

10. What Historical Measures Have Been Taken to Reduce Noncompatible Land Uses in the Vicinity of ATL?
Initial reviews were performed in 1978 when the City of Atlanta sponsored an Airport Noise Abatement and Land Use Compatibility Study
Since that time, the DOA has prepared several updates to ATL’s NEMs

11. FAA Requirements for NEMs
NEMs must identify noncompatible land uses as of the date of submission
Forecast conditions are to be representative of conditions at least five years in the future
NEMs are to be prepared in consultation with states and public/planning agencies whose area, or any portion of whose area, of jurisdiction is within the 65 YDNL contour
Airport operators must certify that interested parties have had an adequate opportunity to submit their views, data and comments on the Draft NEMs

12. FAA Requirements for NEMs (Continued)
NEMS must also provide continuous contours depicting YDNLs of 65, 70 and 75 dB
Must identify runway locations, flight tracks, an airport’s boundary, noncompatible land uses and the location of noise sensitive buildings (e.g., schools, hospitals)
Estimates of the number of people residing within the YDNL 65, 70 and 75 dB contours must also be prepared

13. How Were the 2017/2022 NEMs Prepared?
The Draft NEMs were prepared using Version 2C Service Pack 2 of FAA’s Aviation Environmental Design Tool (AEDT)
The AEDT is a computer software system that models aircraft performance in space and time to derive estimates of aircraft noise
A detailed discussion of the ATL-specific data that was input to the AEDT is provided in the report entitled Draft Noise Exposure Maps Years and 2022.
Available for review on the internet, here at the Tech Campus and at the College Park and Forest Park branch libraries.

14. Year 2017 NEM

15. Year 2022 NEM

16. Comparison: 2017 and 2022
By 2022 the number of aircraft operations (arrivals and departures) is forecast to increase by 30 operations a day
There should be a notable decrease in the contour lobes that are primarily due to departures and an increase in the lobes that are primarily due to arrivals
Decrease
Decrease
Increase
Decrease
Decrease
Increase
Decrease
Increase
Increase
Dashed Contours are for Year 2022

17. Why Do the Contours Change?
The change in aircraft departure noise by 2022 is primary due to Delta Air Lines intention to phase out their MD-88s (to be replaced with A321s and CS100s)
Sound Exposure Level (SEL) 65, 70 and 75 dB Contours
Arrival
Departure
MD-88
A321
CS100

18. Why Do the Contours Change?
The change is also due to the replacement of FedEx DC10s/A306s with B763s
Sound Exposure Level (SEL) 65, 70 and 75 dB Contours
Arrival
Departure
DC10
A306
B763

19. Coordination
Prior to tonight’s Workshop:
June 15th – Presentation to the Atlanta Airport Affairs Committee
June 28th – Scoping session with elected officials (invitees: officials of College Park, East Point, Forest Park, Hapeville, Clayton County and Fulton County)
June 29th – Open house/scoping session with the public

20. Purpose of Tonight’s Public Information Workshop
This workshop is being held to:
Present the Draft Year 2017 and 2022 NEMs
Provide you with an overview of the requirements for and the process of developing the NEMs
Afford you the opportunity to comment on the correctness and adequacy of the Draft NEMs and descriptions of forecast aircraft operations at ATL

21. Comments Submit in writing tonight (comment box)
Provide verbally to court reporter
Mail to Walter Vinson, Public Program Coordinator (address on comment sheet) to
Comments are due November 10, 2017 and will be included in the
Final Noise Exposure Map document.

22. Next Steps Agency/Public Comment Period……Sept 28th – Nov 10th
Finalize NEMs and Report Nov 13th – Dec 1st
Submit to FAA………………………...Dec 4th
Again, comments may be:
Submitted in writing tonight (comment box)
Provided verbally to the court reporter
Mailed to Walter Vinson, Public Program Coordinator (address on comment sheet)
ed to (also on comment sheet)
Comments are due November 10, 2017

23. Thank you for attending tonight’s workshop.
DOA staff and their representatives are here
to answer questions you may have regarding
the information in this presentation and/or the
Draft Year 2017 and 2022 NEMs
This presentation will be repeated at 7 p.m.
Aerials that depict the aircraft noise contours are
available for your review in the lobby
Questions?