1. Katana Consulting RNAV at MSP Part II: Measuring Airport Noise May 2013 Kevin Terrell Katana Consulting

2. Katana Consulting Agenda 1. Background and FAA outreach 2. The noise metric Day-Night-Level 3. Understanding alternative noise metrics 4. Applying alternative metrics at MSP 5. Summary and action plan

3. Katana Consulting 1 | Under RNAV, SW Minneapolis and Edina would have a 5x increase in noise and number of departures, with 23% of ~580 daily departures. 27 Xerxes Ave Penn Ave 2012 Departure 2012 Landing SOURCE: www.macnoise.com/flightrac for Tuesday, July 10th 2012 6am + 8 hours Runway 30L/R RNAV departure tracks Katana analysis Key road Proposed departure track RMT 50th Street 135 23% 173 30% 4 1% 3 1% 70 12% 98 17% 98 17% # daily RNAV flights % of daily total 100 17% 30R 30L

4. Katana Consulting To date RNAV is a national program run by the FAA and the federal government it will go into effect The key question locally is how exactly it will be implemented at MSP In November 2012 the MAC recommended to the FAA that they should only implement RNAV departures to the south of the airport, but not to the northwest Citizen feedback the key reason the MAC made this recommendation However, the MACs recommendation was just that a recommendation. The FAA can in theory do whatever it wants to do The FAA has tested RNAV to the south of MSP, but that trial was suspended. To our knowledge, the FAA has not tried to implement RNAV to the northwest of MSP We do not know when the FAA will make any firm decision on RNAV We must engage early and often in an informed way if we want to influence the outcome

5. Katana Consulting 1.1 | In early 2013 the FAA asked the MAC to provide guidance on community outreach efforts in order to facilitate RNAV departures off 30L/R. SOURCE: MAC

6. Katana ConsultingSOURCE: MSP 2020 Improvements Final Environmental Assessment 1. 2 | The MAC recently completed its 2020 plan, as directed by the Met Council. It will extend the 60 dB contour further into SW Minneapolis.

7. Katana Consulting 1.3 | A recent example of community outreach raises the issue of how well community feedback is integrated into the decision making process. For the MSP 2020 Expansion Plan, the MAC solicited concerns from the public until Friday, February 8th SOURCE: Minnesota State Register

8. Katana Consulting 1.4 | For RNAV, FAAs outreach will advise you that there is a Finding of No Significant Impact or FONSI relative to a noise limit of 65 dB DNL. SOURCE: FAA Airports Desk Reference, Chapter 17

9. Katana Consulting 1.5 | The 65 dB line the FAA uses for a FONSI extends at most about 1.5 miles from the end of runways 30L and 30R. Xerxes Ave Penn Ave 50th Street France Ave 30R 30L

10. Katana Consulting 1.6 | Locally we use the 60 dB line to decide if the MAC must provide noise mitigation. The FAA does not heed that community guideline for a FONSI. Xerxes Ave Penn Ave 50th Street France Ave 30R 30L

11. Katana Consulting Agenda 1. Background and FAA outreach 2. The noise metric Day-Night-Level 3. Understanding alternative noise metrics 4. Applying alternative metrics at MSP 5. Summary and action plan

12. Katana Consulting 2 | DNL is the modeled logarithmic average of noise exposure over the course of a year, adjusted for our extra sensitivity to nighttime noise. SOURCE: Overview of Noise Metrics at www.hmmh.com Ldn = 10*log10 10SEL/10 + 10(SELi+10)/10 i=n+1 m i=1 n 49.4 Daytime Nighttime + 10 dB

13. Katana Consulting 2.1 | However, noise experts recognize that DNL as a measurement is flawed. SOURCE: Whats In Your DNL?, Wyle Laboratories, 2006 Limited explanation Reducing noise exposure to a single value of DNL does not convey to the public the extent of the impact upon them Missing factors Not representative A DNL contour map does not tell residents how many times airplanes fly over them, at what time of day, what type of airplanes, or how those flights may interfere with activities, such as sleep and watching television If the number of aircraft noise events above the minimum threshold that an individual finds annoying increases, then the noise environment for that person has increased

14. Katana Consulting 2.2 | DNL does not account for real world perceptions of noise. SOURCE: Harris Miller Miller & Hanson Basic Aircraft Terminology

15. Katana Consulting 2.3 | The application of DNL is based on 40 year old research showing 13% of the population is highly annoyed by 65 decibels of average noise. SOURCE: EC Position Paper on Dose Response 2002, Katana analysis 1972 Highly Annoyed % of People Annoyed by Aircraft Noise % Average Noise Exposure (dB)

16. Katana Consulting 2.4 | Current research on plane noise indicates that a 55 dB contour line is a more appropriate place to draw that FONSI line. SOURCE: EC Position Paper on Dose Response 2002, Katana analysis 2002 Highly Annoyed % of People Annoyed by Aircraft Noise % Average Noise Exposure (dB) 1972 Highly Annoyed

17. Katana Consulting 2.5 | Additional research indicates that average noise levels over 55 dB can have a noticeable impact on the reading skills of schoolchildren. SOURCE: European Environment Agency report No 11/2010

18. Katana Consulting Agenda 1. Background and FAA outreach 2. The noise metric Day-Night-Level 3. Understanding alternative noise metrics 4. Applying alternative metrics at MSP 5. Summary and action plan

19. Katana Consulting 3 | California uses a more nuanced logarithmic measurement called CNEL that accounts for evening noise. Lden is similar and is used in Europe. Lden = 10*log10 10SEL/10 + 10(SEL+ 4.8)/10 1=n+1 m 10(SELi+10)/10 i=n+1 r i=1 n 49.4 Daytime Evening + 5 dB Nighttime + 10 dB CNEL @ MSP = ~ DNL + 1.5 decibels

20. Katana Consulting 3.1 | Several countries use the 55 dB CNEL contour to restrict uses due to health concerns. All of Europe is required to show the 55 dB contour. SOURCE: Methods of Assessment of Airport Noise, NJS Burton, London South Bank University 55 dB contour lines required 55 dB limit on noise

21. Katana Consulting 3.2 | N70 is an easy to understand measurement developed in Australia. It is calculated using the same noise model that the FAA uses for DNL. SOURCE: Expanding Ways to Describe and Assess Aircraft Noise, Department of Transport and Regional Services, Australia

22. Katana Consulting 3.3 | These additional noise measures are already approved by FAA. SOURCE: FAA Airports Desk Reference, Chapter 17

23. Katana Consulting 3.4 | Summary of noise measures DNL Flawed, logarithmic measurement + 65 dB DNL line for noise studies is based on 40 year old research CNEL, etc N70 Updated & slightly better logarithmic measurement + 55 dB contour line is required in EU and used by some to limit impact A simple, linear measurement = How many times a day can I not hear you because of a plane?

24. Katana Consulting Agenda 1. Background and FAA outreach 2. The noise metric Day-Night-Level 3. Understanding alternative noise metrics 4. Applying alternative metrics at MSP 5. Summary and action plan

25. Katana Consulting 4 | Recall that the FAA uses the 65 dB contour as the area to analyze for a FONSI. Xerxes Ave Penn Ave 50th Street France Ave SOURCE: www.macnoise.com

26. Katana Consulting 4.1 | Other countries use the 55 dB contour. Here, that extends to Penn Ave, beyond Lake Harriet and encompasses thousands of additional people. Xerxes Ave Penn Ave 50th Street France Ave SOURCE: MAC PBN Overview map, www.macnoise.com; Katana analysis

27. Katana Consulting 4.2 | Beyond Lake Harriet, departing flights from medium aircraft typically exceed 70 decibels, and would be counted as part of the N70 metric. SOURCE: www.macnoise.com Altitude

28. Katana Consulting 4.3 | With RNAV the N70 map to the northwest of MSP would likely blanket Minneapolis, Richfield & Edina with 100+ count tracks & the contour extends. Xerxes Ave Penn Ave France Ave 27 50th Street 2 1 N70 100+ N70 50+ Key road Number of daily flights greater than 70 dB (N70) SOURCE: www.macnoise.com; Katana analysis; 55 dB line is estimated based on current RMT data 55 dB DNL

29. Katana Consulting 4.4 | Arrivals would continue over the lakes, as is the case today. Xerxes Ave Penn Ave France Ave 27 50th Street 2 1 Number of daily flights greater than 70 dB (N70) SOURCE: www.macnoise.com; Katana analysis, 55 dB line is estimated based on current RMT data N70 100+ N70 50+ Key road 55 dB DNL Arrival path

30. Katana Consulting E G I J K L N V 4.5 | The 55 dB CNEL contour and N70 would affect 19 more schools than the FAA addresses today, including 1/3 of Minneapolis total public enrollment U F M HO 1 29 27 7 2 Local schools A.Lake Nokomis B.Our Lady of Peace C.Hale Community D.Roosevelt High E.Windom F.Annunciation G.Ramsey H.Field Community I.Washburn High J.Kenny K.Anthony L.Armatage M.Carondelet N.Lake Harriet Upper O.Southwest High P.Carondelet Q.Lake Harriet Lower R.Barton Open S.Pilgrim Lutheran T.Lake Country U.Burroughs V.Academy of Holy Angels 55 dB CNEL, est. 65 dB DNL 29 RMT N70, 100+ SOURCE: MAC PBN Overview, www.macnoise.com; Katana + community analysis; 55 dB CNEL based on 2011 RMT data 8 A

31. Katana Consulting Agenda 1. Background and FAA outreach 2. The noise metric Day-Night-Level 3. Understanding alternative noise metrics 4. Applying alternative metrics at MSP 5. Summary and action plan

32. Katana Consulting 5 | Summary Outdated metrics The FAAs FONSI is based on an outdated metric and a 40 year old understanding of the impact of noise New metrics available We just need to ask There are more current, more accurate and easier to understand ways to express the impact of noise on our community This is OUR community not the FAAs Those new metrics are available to us we just need to demand action from our representatives

33. Katana Consulting 5.1 | What you can do With Federal Reps Sen. Klobuchar Sen. Franken Rep. Ellison Rep. Paulsen With Local Reps In the Community Mayor Rybak C. Member Quincy C. Member Glidden C. Member Hodges Rep. Allen Rep. Hornstein Sen. Hayden Sen. Dibble Sen. Franzen Attend events Be an Event Captain Connect to resources File noise complaints Require the FAA to update how it measures noise for a FONSI Demand the use of CNEL, 55 dB and N70 to drive transparency and accountability. Dont fake it listen to the community! Get started now! >>> >>> >>>

34. Katana Consulting 5.2 | Filing a noise complaint is easy at www.macnoise.com

35. Katana Consulting Contact: Kevin Terrell kevin@katanaconsulting.com www.katanaconsulting.com Board Member, Lynnhurst Neighborhood Association For further information Sign our petition and donate at www.mspFairSkies.org Like us on Facebook at MSP Fair Skies