2020 Annual Report

Fly Quiet Program Chicago O’Hare International Airport

Visit the O’Hare Noise Webpage on the Internet at www.flychicago.com/oharenoise 2020 Annual Report

BACKGROUND

On June 17, 1997, the City of Chicago announced that operating at Chicago O’Hare International Airport had agreed to use designated noise abatement flight procedures in accordance with the Fly Quiet Program. The Fly Quiet Program was implemented in an effort to further reduce the impacts of aircraft noise on the surrounding neighborhoods.

The Fly Quiet Program is a voluntary program that encourages pilots and air traffic controllers to use designated nighttime preferential runways and flight tracks developed by the Chicago Department of Aviation (CDA) in cooperation with the O'Hare Noise Compatibility Commission, the airlines, and the air traffic controllers. These preferred routes direct aircraft over less-populated areas, such as forest preserves, highways, as well as commercial and industrial areas.

As part of the Fly Quiet Program, the CDA prepares a Fly Quiet Report. This report is shared with CDA staff, the O'Hare Noise Compatibility Commission, the airlines, the Federal Aviation Administration (FAA), and the general public. The Fly Quiet Report contains detailed information regarding Fly Quiet Mode, runway use, flight operations, flight tracks, and noise complaints and 24-hour tracking of ground run-ups. The data presented in this report is compiled from the Airport Noise Management System (ANMS) and airport operation logs.

FLY QUIET MODE

The FAA considers nighttime hours as 10:00 p.m. - 7:00 a.m.1 It is the CDA’s goal for the Fly Quiet Program to occur during the entire nine-hour nighttime period of 10:00 p.m. to 7:00 a.m., however due to operational demand by the airlines and traveling public, Fly Quiet is typically limited to a period less than nine hours. Fly Quiet Mode (FQM), the period of time in Fly Quiet, starts each night on or after 10:00 p.m., once demand allows for two departure runways and one arrival runway and allows for the use of the preferential flight tracks as outlined in the CDA’s Fly Quiet Manual. Demand for the majority of the night allows for one arrival runway and one departure runway. Once demand increases in the morning where additional runways are needed and preferential flight tracks can no longer be utilized, Fly Quiet Mode stops.

Highlights for 2020 include:

Average Start Time: 10:22 p.m. Average Stop Time: 6:28 a.m. Average Nightly Time in FQM: 8:06 Average Nightly Operations in FQM: 74

1 Airport Noise Compatibility Planning (14 CFR Part 150)

Chicago Department of Aviation Page 1 2020 OPERATIONS

O’Hare has eight runways that are all utilized at different times depending on a number of conditions including weather, airfield pavement and construction activities, and air traffic demand.

The Runway Use Reports disclose runway utilize for the period and compares the average percentage of use for each runway during the current year. The percentage of use for departures and arrivals is shown graphically for each runway. This data is presented for all aircraft types during Fly Quiet Mode. The Nighttime Hourly Operations Report compares the arrivals and departures by hour in 15 minute increments to the current year. Percentage is a ratio whereas a percentage point is the difference between two percentages.

Highlights for 2020 include:

Departures Arrivals Most used nighttime departure runway: 28R – 47% Most used nighttime arrival runway: 28C – 34% 28C night departures increased by 8pp from 2019 28C night arrivals increased by 7pp from 2019 9R night departures decreased by 11pp from 2019 27L night arrivals decreased 6pp from 2019 pp = Percentage Points Nighttime operations represent 9% of the overall daily operations

PREFERENTIAL FLIGHT TRACKS

As part of the Fly Quiet Program, the CDA worked with the O'Hare Noise Compatibility Commission, the airlines, and the air traffic controllers to identify preferred runways and flight tracks for nighttime operations at O’Hare. The preferred routes direct aircraft over less-populated areas in an effort to limit the effects of noise on the surrounding communities.

Adherence to nighttime departure preferential flight tracks is measured by the ANMS. An average deviation graphic and table is provided for all runways. The Nighttime Departure Track Report measures FQM deviation (in nautical miles) from the preferred flight tracks and is divided into three categories:

Highlights for 2020 include:

Categories Percent Deviation

less than 0.5 miles 84% between 0.5 and 1.0 miles 13% greater than 1.0 miles 3%

A detailed deviation summary is also provided for the current year that shows total arrivals, total departures, and average FQM deviation (in nautical miles) from the preferred flight tracks.

Chicago Department of Aviation Page 2 2020 NOISE COMPLAINTS

The CDA maintains a toll-free noise hotline (1-800-435-9569) and an online service at www.flychicago.com/oharenoise, and a free CHI 311 mobile app for citizens to express their concern about particular aircraft events or aircraft noise levels in general. The Nighttime Noise Complaint Report summarizes the number of complaints received from households with verifiable addresses and where the households were located. The tables illustrate the method of complaints, and nature of complaints during the specified year. These totals only include complaints made within the State of Illinois to the O’Hare Noise Hotline toll-free number, online service, or CHI 311 mobile app.

GROUND RUN-UPS

Ground run-ups are aircraft engine tests that are performed to ensure that the engines are working properly after maintenance is performed. Ground run-ups typically occur at night and generate high levels of noise for extended periods of time. In 1997, the CDA constructed a ground run-up enclosure (GRE) at O’Hare to help reduce the noise impacts of ground run-ups on the communities surrounding the airport. This facility was the first of its kind in the United States. When it is not possible to use the GRE, run-ups are performed at one of the four alternative locations. In the fall of 2017, the CDA relocated the GRE from its original location to a new location approximately 1,100 feet to the northeast, but still located on the Scenic Hold Pad.

The Airline Ground Run-up Report displays the total number of ground run ups from the current year by airline. The Aircraft Ground Run-up Report displays the total number of ground run ups from the current year by aircraft. Both reports compare the percent utilization of the GRE facility to the percent utilization of other locations for ground run-ups.

NOISE

The Nighttime Aircraft Noise Report summarizes noise measurements from each of the 36 noise monitors located around O’Hare. The data presented summarizes the Equivalent Sound Level (Leq). Leq is used to identify the average sound level over a given period of time (in this case 10 p.m. to 7 a.m.) and is the metric used for this analysis as it is the most appropriate noise measure for periods of time less than 24 hours.

Chicago Department of Aviation Page 3 2020 Nighttime Hourly Operations Report Chicago O'Hare International Airport Period: January 1, 2020 through December 31, 2020 Time of Day: 10:00 p.m. to 7:00 a.m.

Average Arrivals and Departures by Hour

FQM START FQM STOP 25 10:22 PM 6:28 AM

20

15 Average Fly Quiet Duration – 8:06, 74 Operations 10

5

0

5 Average Average Daily Operations 10

15

20 Nighttime Duration – 9:00, 121 Operations 25

10 p.m. 11 p.m. 12 a.m. 1 a.m. 2 a.m. 3 a.m. 4 a.m. 5 a.m. 6 a.m. 2020 Arrivals 2019 Arrivals 2020 Departures 2019 Departures

Chicago Department of Aviation Page 4 2020 Runway Use Report Chicago O'Hare International Airport Period: January 1, 2020 through December 31, 2020 Time of Day: 10:00 p.m. to 7:00 a.m.

Average Runway Use (10 p.m. to 7 a.m.) Source: Airport Noise Management System (ANMS) Runway Utilization 4L 4R 9L 9C 9R 10L 10C 10R 22L 22R 27L 27C 27R 28L 28C 28R

Average Daily Departures 2020 1 0 0 0 4 8 3 0 5 0 1 0 0 0 5 23 2019 1 0 0 n/a 24 22 2 0 21 0 0 n/a 0 0 4 55 Average Daily Arrivals 2020 0 1 1 0 1 4 14 0 0 3 14 0 3 0 24 5 2019 0 1 9 n/a 2 8 41 1 0 2 41 n/a 8 0 44 8

Departures (10 p.m. to 7 a.m.) Arrivals (10 p.m. to 7 a.m.) 50% 50%

40% 40%

30% 30%

20% 20%

10% 10%

0% 0%

Percentage Departure Utilization Percentage Arrival Utilization 2020 2020 0 1 # 5

0 0 2 5

0 0 0 0

7 20 1 1

0 0 47 16 5 6

11 6 20 34

0 0 0 0 # 0

0 0 11 0 2

Runway 9C-27C was commissioned on November 5, 2020.

Chicago Department of Aviation Page 5 2020 Runway Use Report Chicago O'Hare International Airport Period: January 1, 2020 through December 31, 2020 Time of Day: Fly Quiet Mode (FQM)

Average Runway Use (FQM) Source: Airport Noise Management System (ANMS) Runway Utilization 4L 4R 9L 9C 9R 10L 10C 10R 22L 22R 27L 27C 27R 28L 28C 28R

Average Daily Departures 2020 1 0 0 0 2 5 3 0 2 0 0 0 0 0 5 12 2019 0 0 0 n/a 3 7 2 0 4 0 0 n/a 0 0 4 14 Average Daily Arrivals 2020 0 2 0 0 0 3 9 0 0 3 6 0 0 0 15 4 2019 0 1 0 n/a 0 7 17 0 0 1 13 n/a 0 0 18 7

Departures (FQM) Arrivals (FQM) 50% 50%

40% 40%

30% 30%

20% 20%

10% 10%

0% 0%

Percentage Departure Utilization Percentage Arrival Utilization 2020 2020 0 2 # 7

0 0 0 0

0 0 0 0

6 15 1 1

0 0 41 17 7 10

16 9 22 34

0 0 0 0 # 0

0 0 8 0 4

Runway 9C-27C was commissioned on November 5, 2020. Purple denotes Fly Quiet preferential departure and arrival runways.

Chicago Department of Aviation Page 6 2020 Nighttime Preferential Flight Track Summary (1/2) Chicago O'Hare International Airport Period: January 1, 2020 through December 31, 2020 Time of Day: Fly Quiet Mode (FQM)

Average Departure Airlines Type1 Arrivals Departures Deviation (nautical miles) ABX Air C 102 210 0.28 Aer Lingus P 1 3 0.21 Aerologic C 81 112 0.39 AeroMexico P 182 191 0.31 AeroUnion C 9 14 0.24 Air Icelandic C 4 11 0.42 Air Canada Express/Sky Regional P 9 7 0.29 Air China Cargo C 11 14 0.50 P 33 1 0.33 Air France P 2 70 0.20 Air France Cargo C 49 147 0.33 Air India P 73 7 0.73 Air Transport International C 358 26 0.12 AirBridge Cargo Airlines C 101 174 0.37 P 479 127 0.28 All Nippon Airways P 5 3 0.41 P -- 1 0.07 P 1,795 1,103 0.31 American Eagle/Envoy P 534 143 0.22 ANA Cargo C 35 -- -- Asiana Cargo C 147 186 0.26 ASL Airlines Belgium C 4 11 0.31 C 267 363 0.27 P 99 9 2.02 British Airways P -- 4 0.54 CargoLogicAir C 4 10 0.40 Cargolux Airlines C 192 265 0.32 Cargolux Italia C 30 43 0.38 Cathay Pacific Cargo C 78 172 0.44 China Airlines Cargo C 141 181 0.28 China Cargo Airlines C 3 10 0.24 China Eastern Airlines P -- 1 0.40 China Southern Airlines C 116 112 0.35 Copa Airlines P 62 10 0.48 P 524 386 0.30 / P 3 12 0.20 EL AL Israel Airlines P -- 1 0.16 Emirates P 7 8 0.26 Emirates SkyCargo C 43 81 0.25 Ethiopian Airlines P 32 -- -- Etihad Airways P -- 3 0.08 Etihad Cargo C 21 52 0.43 EVA Air P 4 287 0.41 EVA Air Cargo C 22 24 0.44 FedEx C 1,097 955 0.25 P 612 185 0.30 General Aviation -- 147 143 0.40 Green represents a deviation of less than 0.5 nautical miles Orange represents a deviation between 0.5 and 1.0 nautical miles Red represents a deviation greater than 1.0 nautical mile Note 1: Passenger Carrier (P) or Dedicated Cargo (C)

Chicago Department of Aviation Page 7 2020 Nighttime Preferential Flight Track Summary (2/2) Chicago O'Hare International Airport Period: January 1, 2020 through December 31, 2020 Time of Day: Fly Quiet Mode (FQM)

Average Departure Airlines Type1 Arrivals Departures Deviation (nautical miles) Hainan Airlines P 11 29 0.29 Icelandair P -- 1 0.68 Interjet P 151 159 0.29 Japan Airlines P 34 -- -- JetBlue Airways P 107 27 0.37 C 235 162 0.29 Korean Air Cargo C 256 324 0.28 LATAM Cargo Colombia C 17 16 0.15 LOT P 4 96 0.37 Lufthansa P 2 26 0.45 Lufthansa Cargo C 50 194 0.38 Martinair C -- 6 0.24 National Air Cargo C 23 23 0.22 Nippon Cargo Airlines C 162 219 0.31 C 40 11 0.25 Qantas Freight C 90 91 0.43 Qatar Airways P 4 45 0.25 Qatar Airways Cargo C 256 317 0.33 Republic Airlines P 104 50 0.19 Royal Jordanian P 2 1 0.74 Scandinavian Airlines P -- 41 0.46 Silk Way West Airlines C 72 87 0.51 Singapore Airlines Cargo C -- 1 0.11 C 27 31 0.17 Sky West Aviation P 875 303 0.23 C 9 32 0.49 P 956 335 0.28 P 11 13 0.17 Suparna Airlines C 13 18 0.21 Swiss Air Lines P 1 26 0.27 TAP Air Portugal P 9 -- -- Turkish Airlines P 30 70 0.43 Turkish Cargo C 105 161 0.50 P 3,092 950 0.29 / P 108 50 0.21 United Express/CommutAir P -- 2 0.06 United Express/ExpressJet P 126 6 0.27 United Express/Gojet P 48 38 0.30 United Express/Mesa P 1 -- -- United Express/Trans States P 10 11 0.26 UPS C 909 648 0.24 Virgin Atlantic P -- 14 0.28 VivaAerobus P 37 100 0.48 Volaris P 309 331 0.41 Volga-Dnepr Airlines C -- 5 0.39 C 89 129 0.25 Overall 15,903 11,077 0.31 Green represents a deviation of less than 0.5 nautical miles Orange represents a deviation between 0.5 and 1.0 nautical miles Red represents a deviation greater than 1.0 nautical mile Note 1: Passenger Carrier (P) or Dedicated Cargo (C)

Chicago Department of Aviation Page 8 2020 Nighttime Departure Track Report Chicago O'Hare International Airport Period: January 1, 2020 through December 31, 2020 Time of Day: 10:00 p.m. to 7:00 a.m.

11,077 FQM Departures 6,888 Non-FQM2 Departures 17,965 Total Departures

Preferential Flight Existing Runways Future Runways Track Runway Departures (in %) versus Deviation (in nautical miles) Deviation 4L 4R 9C 9L 9R 10C 10L 10R 22L 22R 27C 27L 27R 28C 28L 28R (# tracks) < 0.5 86% 67% 94% 94% 36% 89% 87% (6,989) 0.5 < 1.0 6% 27%n/a1 n/a1 3%n/a1 3%n/a1 57%n/a1 n/a1 6%n/a1 n/a1 n/a1 10% (1,052) >1.0 8% 6% 3% 3% 7% 5% 3% (293)

n/a = not applicable Note 1: The departures from runways 9C, 9L, 10C, 10R, 22R, 27C, 27R, 28C, and 28L are shown in white and do not have preferential flight tracks. Note 2: Non-FQM departures are shown in purple. Flight tracks shown until 3,000' Mean Sea Level (MSL).

Chicago Department of Aviation Page 9 2020 Nighttime Noise Complaint Report Chicago O'Hare International Airport Period: January 1, 2020 through December 31, 2020 Time of Day: 10:00 p.m. to 7:00 a.m.

Total Complaints Total Complaints Total Complaints Households Households Households for the Year for the Year for the Year Community1 Community1 Community1 1Q 2Q 3Q 4Q 1Q 2Q 3Q 4Q 1Q 2Q 3Q 4Q 2020 2020 2020 20 20 20 20 20 20 20 20 20 20 20 20

Addison 1 2 -- 1 12 Glencoe 1 ------1 Skokie 1 1 1 1 138 Algonquin ------Glenview 21 6 9 12 564 Sleepy Hollow ------Arlington Heights 6 5 7 7 350 Gurnee 2 -- -- 1 4 South Barrington ------Barrington ------Hampshire 1 1 1 1 152 South Elgin 2 1 1 1 78 Barrington Hills 1 ------2 Hanover Park 3 3 2 1 208 St. Charles 1 1 1 1 24 Bartlett 6 5 7 2 2,395 Harwood Heights 5 5 8 4 52 Unincorp. Cook ------Batavia -- -- 2 -- 2 Hillside 1 -- 1 1 28 Villa Park ------2 2 Bensenville 2 3 4 1 20 Hoffman Estates 2 1 1 1 128 Wayne ------Berkeley 1 1 -- 1 6 Itasca 5 7 7 7 4,373 West Chicago -- 1 -- -- 1 Berwyn ------Kildeer -- 1 -- -- 1 West Dundee ------Bloomingdale 5 1 3 2 274 La Grange 1 ------1 Western Springs 1 1 1 1 83 Buffalo Grove ------1 1 La Grange Park -- 1 -- -- 1 Westmont ------Burlington ------Libertyville ------1 2 Wheaton ------Carol Stream 1 -- 1 -- 3 Lincolnwood 1 1 1 1 59 Wilmette 1 -- 1 1 16 Carpentersville 1 1 1 1 85 Lombard 4 4 1 4 620 Winfield 1 2 1 1 199 Chicago 98 104 101 83 16,877 Medinah 1 1 -- 1 18 Winnetka ------Ward 38 10 10 12 12 1,067 Morton Grove ------1 1 Wood Dale 11 16 12 11 2,009 Ward 39 13 16 9 10 3,975 Mundelein -- -- 1 -- 2 Ward 40 7 8 8 4 338 Niles 2 1 3 2 1,865 Total 322 266 281 277 40,234 Ward 41 34 33 38 29 2,731 Norridge 9 9 15 13 713 Ward 45 16 22 16 11 3,932 Northbrook -- 1 1 -- 4 Ward Other 18 15 18 17 4,834 Northfield 1 ------1 METHOD OF COMPLAINT Deerfield -- -- 1 -- 1 Northlake 1 ------1 Total % of Total Des Plaines 13 4 6 9 191 Oak Park ------1 1 Website 38,927 96.8% Downers Grove ------Palatine 1 1 1 1 154 App 1,018 2.5% Elburn ------Park Ridge 53 26 31 32 2,978 Telephone 289 0.7% Elgin 2 3 4 1 231 Prospect Heights ------Total 40,234 100% Elk Grove Village 11 10 12 12 1,882 River Forest ------Elmhurst 32 16 12 26 1,954 River Grove ------1 1 NATURE OF COMPLAINT Elmwood Park -- -- 1 -- 1 Riverside ------Total % of Total Evanston 1 1 1 1 379 Rolling Meadows ------Aircraft Noise 31,071 77.2% Franklin Park 1 1 -- 1 31 Roselle 1 2 4 1 280 Low Flying 2,316 5.8% Geneva 1 2 -- -- 4 Rosemont -- 2 -- -- 7 Vibration 1,558 3.9% Gilberts 1 1 1 1 343 Schaumburg -- 3 2 -- 7 Frequency 5,242 13.0% Other 47 0.1% Glen Ellyn -- 1 1 -- 3 Schiller Park 4 6 9 21 410 Total 40,234 100% Note 1: Complaints made within the State of Illinois from households with verifiable addresses.

Chicago Department of Aviation Page 10 2020 Northfield Prospect Heights !!37

Arlington Rolling Heights Glenview Meadows Chicago O'Hare !10 ! International Airport Mount Prospect Golf City of Chicago 1 ! !21 Lori E. Lightfoot, Mayor Jamie L. Rhee, Commissioner of Aviation Morton Des Plaines !20 Grove Permanent Noise

Niles Monitor Locations !!7 !!24 14 ! Legend Park Ridge (! Permanent Noise Monitors (36) !!26 8 12 9L !! 42

! !13 !! Existing Runways

Elk Grove ! 27R 33

R !

2 ! Village 2 !34 Future Runway 41 39

9C 25 !! O'Hare Modernization Program 27 5 27C !! 9R !! Build-Out Noise Contour

27L Rosemont 4 (65 DNL) Itasca L

!32 41 ! L 45 Chicago Ward Boundaries 10L 22 !!22 !!17 10C 28

28R !! !44 !!29 !31 Harwood Community Boundaries ! ! 28C Schiller Norridge Heights Wood 10R Park Dale !3 !18 ! 28L ! 4 Chicago 65 DNL R !!16 Bensenville !!4 38 !!30 Franklin !!11 Park 36 15 31 !! 30 Addison River Elmwood !!23 Grove Park !!35 Northlake !!2 29 Miles Stone Elmhurst Park Oak Melrose 37 012 ± Park !!19 Park River Forest Date: December 9, 2020 File: ORD_RMT_Vers2.mxd Chicago Department of Aviation Page 11 2020 Nighttime Aircraft Noise Report Chicago O'Hare International Airport Period: January 1, 2020 through December 31, 2020 Time of Day: 10:00 p.m. to 7:00 a.m. Metric: Aircraft Leq

1 Site Last 10 Years Monitored Noise Levels Community # 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020

1 Arlington Heights 51.5 51.0 50.0 45.9 48.3 48.8 48.1 48.4 42.9 42.4 2 Melrose Park 44.1 48.4 44.3 46.5 47.6 48.1 49.2 51.9 42.9 38.7 3 Bensenville 52.2 53.0 51.9 54.6 54.7 54.9 54.7 55.5 56.0 54.0 4 Schiller Park 44.8 50.1 46.7 49.6 43.4 49.3 47.4 47.9 47.3 42.8 5 Chicago 49.8 49.5 48.1 61.4 52.1 52.0 54.7 51.9 50.5 46.0 7 Des Plaines 45.1 48.3 43.1 43.8 41.9 40.6 40.6 42.7 42.8 38.3 8 Des Plaines 50.7 51.3 50.4 50.4 46.8 45.2 50.3 50.6 47.8 46.2 10 Rolling Meadows 50.6 51.5 54.9 47.2 44.5 48.7 46.8 41.3 40.4 38.9 11 Chicago 47.1 53.4 50.2 54.2 44.3 45.4 46.2 46.2 46.4 44.3 12 Elk Grove Village 48.6 55.4 51.1 56.9 51.6 53.3 51.3 51.1 50.1 45.9 13 Elk Grove Village 64.3 64.2 64.3 56.9 59.7 60.3 57.4 55.0 54.3 47.7 14 Elk Grove Village 52.1 52.6 52.7 49.7 52.7 52.4 50.0 46.8 47.3 45.4 15 Franklin Park 47.4 50.1 46.0 43.6 40.8 43.5 40.9 42.2 41.0 38.0 16 Franklin Park 55.0 61.5 54.4 54.6 55.7 54.4 54.8 56.0 56.1 53.4 17 Harwood Heights 61.3 57.2 56.6 69.4 57.2 57.3 57.7 57.2 55.6 54.0 18 Norridge2 ------52.3 52.4 50.3 19 Stone Park 41.3 50.8 41.5 45.2 41.8 40.6 41.4 43.8 45.2 41.4 20 Mount Prospect 51.9 52.8 52.5 57.8 46.8 46.9 44.7 48.7 46.0 42.7 21 Mount Prospect 46.4 45.1 44.1 37.3 41.0 43.2 39.7 41.5 43.1 38.7 22 Norridge 60.3 58.6 59.2 57.8 56.8 59.0 60.7 59.2 58.7 57.2 23 Northlake 54.5 55.2 55.2 53.3 55.9 54.4 54.8 55.0 55.0 49.1 24 Park Ridge 44.5 45.5 42.8 44.4 42.0 44.2 45.3 45.5 41.0 43.0 25 Park Ridge 47.8 53.2 47.9 51.9 52.4 54.0 54.0 54.7 55.2 48.9 26 Park Ridge 47.6 47.3 45.4 46.8 45.1 45.8 47.3 48.8 49.4 43.7 27 Rosemont 55.1 56.6 54.2 57.8 58.6 61.1 60.6 61.6 61.7 54.4 28 Schiller Park 70.2 68.5 68.9 67.8 66.2 66.1 67.9 68.0 66.9 64.9 29 Wood Dale 59.6 56.8 57.4 58.0 58.6 59.1 59.4 60.1 59.8 57.9 30 Wood Dale 45.7 51.1 46.0 46.2 43.8 46.3 47.0 46.0 46.6 43.1 31 Bensenville3 ------63.9 61.2 32 Wood Dale 55.3 54.2 55.0 58.0 58.9 58.2 59.5 58.1 57.4 54.5 33 Park Ridge 43.9 48.2 47.6 49.9 50.6 49.8 51.7 53.7 53.2 46.3 34 Elk Grove Village 49.1 51.2 50.6 50.9 50.4 52.6 50.7 50.1 50.1 48.6 35 Unincorporated Cook 44.5 50.9 49.4 47.7 48.8 47.8 47.7 47.5 47.6 43.4 37 Mount Prospect 47.0 49.8 47.8 46.4 37.2 39.0 37.1 36.7 40.4 36.7 42 Chicago4 ------46.6 48.1 50.9 48.2 43.9 44 Itasca5 ------58.4 57.7 54.9 1 Leq (Equivalent Sound Level): The average sound energy level during a stated period of time. 2 Site 18 was commissioned on January 12, 2018. 3 Site 31 was commissioned on August 3, 2018. 4 Site 42 was commissioned on June 27, 2015. 5 Site 44 was commissioned on January 12, 2018.

Chicago Department of Aviation Page 12 2020 Aircraft Ground Run-Up Report Chicago O'Hare International Airport Period: January 1, 2020 through December 31, 2020 Time of Day: 24 Hours

Run-ups Run-ups in Percentage Aircraft Total GRE Use of GRE

A220 1 1 100%

A319 19 18 95%

A320 15 13 87%

A321 4 2 50%

B737 164 156 95%

B747 2 1 50%

B757 19 10 53%

B767 6 1 17%

B777 18 7 39%

B787 10 0 0%

CRJ200/700/900 170 170 100%

E140/145 193 192 99%

E170/175 134 134 100%

MD10/11 1 0 0%

Other 2 2 100%

TOTAL 758 707 93%

Chicago Department of Aviation Page 13 2020 Airline Ground Run-Up Report Chicago O'Hare International Airport Period: January 1, 2020 through December 31, 2020 Time of Day: 24 Hours

Run-ups Run-ups Run-ups Percentage Total in GRE Other Use of GRE

All Airlines 758 707 51 93%

163 147 16 90%

270 269 1 100%

84 57 27 68%

219 219 0 100%

Other 22 15 7 68%

Chicago Department of Aviation Page 14 2020

Chicago Department of Aviation O’Hare Noise Hotline: 1-800-435-9569 www.flychicago.com/oharenoise