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4th Quarter 2020 Report

Fly Quiet Program O’Hare International Airport

Visit the O’Hare Noise Webpage on the Internet at www.flychicago.com/oharenoise 4th Quarter 2020 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 (ONCC), 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 Quarterly Fly Quiet Report. This report is shared with CDA staff, the ONCC, 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 4Q 2020 include:

Average Start Time: 10:14 p.m. Average Stop Time: 6:40 a.m. Average Nightly Time in FQM: 8:26 Average Nightly Operations in FQM: 80

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 quarter with the previous quarter as well as with the 12-month average. 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 quarter with the previous quarter as well as with the 12-month average. Percentage is a ratio whereas a percentage point is the difference between two percentages.

1 Airport Noise Compatibility Planning (14 CFR Part 150)

Chicago Department of Aviation Page 1 4th Quarter 2020 Highlights for 4Q 2020 include:

Departures Arrivals Most used nighttime departure runway: 28R – 49% Most used nighttime arrival runway: 28C – 44% 28R night departures increased by 9pp from 3Q 2020 28C night arrivals increased by 12pp from 3Q 2020 10C night departures decreased by 9pp from 3Q 2020 10C night arrivals decreased by 20pp from 3Q 2020 pp = Percentage Points

Nighttime operations represent 8% of the overall daily operations

Percent of Carrier Category Total United & American 29% Other Domestic 15% Other International 12% Dedicated Cargo 43% General Aviation 1% FQM Total 100%

ARRIVAL SUMMARY

A detailed summary is provided for the two most-used arrival runways (28C and 28R).

PREFERENTIAL FLIGHT TRACKS

As part of the Fly Quiet Program, the CDA worked with the ONCC, 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. A detailed airline deviation summary is provided for the two most-used departure runways (22L and 28R); the airline deviation is also compared to the data from the same quarter of the previous year.

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 4Q 2020 include:

Categories Percent Deviation

less than 0.5 miles 80% between 0.5 and 1.0 miles 17% greater than 1.0 miles 3%

Chicago Department of Aviation Page 2 4th Quarter 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. In February 2015, a citizen group created a software script to register aircraft noise complaints via the City of Chicago’s 311 site. In January 2018 the City of Chicago implemented a captcha to improve the performance of its 311 system by reducing the number of non-human submissions. On December 19, 2018, the City of Chicago launched a new software platform for service requests of all types, including aircraft noise complaints. This new platform includes multiple methods to submit a complaint including telephone, Internet and the free CHI 311 mobile app.

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 quarter. These totals only include complaints made within the State of to the O’Hare Noise Hotline toll-free number, online service, or CHI 311 mobile app. Data for noise complaints made prior to December 18, 2018, is available on the CDA’s website at www.flychicago.com/oharenoise.

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 quarter by airline. The Aircraft Ground Run-up Report displays the total number of ground run ups from the current quarter by aircraft. Both reports compare the percent utilization of the GRE facility to the percent utilization of other locations for ground run-ups. It also compares the current quarter’s GRE usage to the 12-month average and to the same quarter of the previous year.

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.

The data in this report displays the average Leq for the current quarter and its comparison to the previous four quarters. It also compares the current quarter’s Leq to the 12-month average. Numbers displayed in red represent an increase of at least 1 dB over the aircraft Leq from the same quarter of the previous year whereas numbers displayed in green represent a decrease of at least 1 dB from the aircraft Leq from the same quarter of the previous year.

Chicago Department of Aviation Page 3 4th Quarter 2020 Nighttime Hourly Operations Report Chicago O'Hare International Airport Period: 4th Quarter 2020 Time of Day: 10:00 p.m. to 7:00 a.m.

Average Arrivals and Departures by Hour FQM START FQM STOP 10:14 PM 6:40 AM 25

20 Average Fly Quiet Duration – 8:26, 80 Operations 15

10

5

0

5 Average Average Daily Operations 10

15

20 Nighttime Duration – 9:00, 103 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. 4Q20 Arrivals 4Q19 Arrivals Arrivals 12 Month Avg. 4Q20 Departures 4Q19 Departures Departures 12 Month Avg.

Chicago Department of Aviation Page 4 4th Quarter 2020 Runway Use Report Chicago O'Hare International Airport Period: 4th Quarter 2020 Time of Day: 10:00 p.m. to 7:00 a.m.

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 4Q 2020 1 0 0 0 1 5 2 0 5 0 1 0 0 0 7 21 3Q 2020 0 0 0 n/a 3 6 5 0 1 0 1 n/a 0 0 5 14 12 Month Avg. 1 0 0 n/a 4 8 3 0 5 0 1 n/a 0 0 5 24 Average Daily Arrivals 4Q 2020 0 3 1 0 0 2 6 0 1 4 8 0 4 0 27 5 3Q 2020 0 0 0 n/a 1 4 14 0 0 1 8 n/a 0 0 14 3 12 Month Avg. 0 1 1 n/a 1 4 15 0 0 4 14 n/a 3 0 25 5

Departures (10 p.m. to 7 a.m.) Arrivals (10 p.m. to 7 a.m.) 80% 80%

70% 70%

60% 60%

50% 50%

40% 40%

30% 30%

20% 20%

10% 10%

0% 0%

Percentage Departure Utilization Percentage Arrival Utilization 4Q 2020 4Q 2020 0 2 # 6

0 0 1 6

0 0 0 0 0 0

3 14 1 0 0 1 49 12 4 9

18 4 10 44 0 0 0 # 0 0

0 0 11 0 5

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

Chicago Department of Aviation Page 5 4th Quarter 2020 Runway Use Report Chicago O'Hare International Airport Period: 4th Quarter 2020 Time of Day: Fly Quiet Mode (FQM)

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 4Q 2020 1 0 0 0 1 4 2 0 5 0 1 0 0 0 7 17 3Q 2020 0 0 0 n/a 3 5 4 0 1 0 1 n/a 0 0 5 11 12 Month Avg. 1 0 0 n/a 2 5 3 0 2 0 0 n/a 0 0 5 13 Average Daily Arrivals 4Q 2020 0 3 0 0 0 2 4 0 1 3 5 0 0 0 21 5 3Q 2020 0 0 0 n/a 1 3 12 0 0 1 6 n/a 0 0 12 3 12 Month Avg. 0 2 0 n/a 0 3 9 0 0 3 7 n/a 0 0 15 4

Departures (FQM) Arrivals (FQM) 80% 80%

70% 70%

60% 60%

50% 50%

40% 40%

30% 30%

20% 20%

10% 10%

0% 0%

Percentage Departure Utilization Percentage Arrival Utilization 4Q 2020 4Q 2020 0 2 # 8

0 0 0 0

0 0 0 0 0 0

2 11 1 0 0 1 47 11 5 12

20 4 9 48 0 0 0 # 0 0

0 0 13 0 6

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

Chicago Department of Aviation Page 6 4th Quarter 2020 Nighttime Arrival Summary Chicago O'Hare International Airport Period: 4th Quarter 2020 Time of Day: Fly Quiet Mode (FQM)

Runway 28C Arrivals 4th Quarter 2020 4th Quarter 2019 Airline Arrivals Arrivals Name Type1 ABX Air C 18 -- Aerologic C 6 4 AeroMexico P 30 45 AeroUnion C 2 -- Air Icelandic C 1 -- Cargo C 5 -- Cargo C 6 2 P 31 5 Air Transport International C 32 -- AirBridge Cargo Airlines C 5 4 P 39 57 P 2 -- P 209 337 American Eagle/Envoy P 60 37 ANA Cargo C 2 -- Asiana Cargo C 25 7 ASL Airlines Belgium C 2 -- C 27 25 P 38 -- Airlines C 21 21 C 7 1 Cargo C 12 6 Cargo C 30 14 China Southern Cargo C 23 7 P 7 22 P 40 55 SkyCargo C 9 5 P 22 1 Etihad Cargo C 5 -- EVA Air Cargo C 6 3 FedEx C 197 149 P 62 66 General Aviation -- 9 14 P 28 -- Jetblue Airways P 5 45 C 39 8 Cargo C 37 17 LATAM Cargo C 8 -- Cargo C 7 5 National Air Cargo C 7 -- C 15 -- C 6 1 Freight C 17 6 Cargo C 33 18 P 29 27 P 2 -- Silk Way West Airlines C 13 4 C 3 3 Sky West Aviation P 55 139 C 2 -- P 95 116 P 1 -- C 3 3 TAP Air Portugal P 4 -- Turkish Cargo C 12 11 P 302 637 / P 21 16 United Express/Gojet P 2 8 UPS C 107 98 VivaAerobus P 13 2 P 41 12 C 21 6 Total 1,918 2,069 Note 1: Passenger Carrier (P) or Dedicated Cargo (C)

Chicago Department of Aviation Page 7 4th Quarter 2020 Nighttime Arrival Summary Chicago O'Hare International Airport Period: 4th Quarter 2020 Time of Day: Fly Quiet Mode (FQM)

Runway 28R Arrivals 4th Quarter 2020 4th Quarter 2019 Airline Arrivals Arrivals Name Type1 ABX Air C 8 -- Aerologic C 4 6 AeroMexico P 7 8 AeroUnion C 2 -- Icelandic C 2 -- Air France Cargo C 4 2 Air Transport International C 18 -- AirBridge Cargo Airlines C 3 5 Alaska Airlines P 9 14 American Airlines P 31 79 American Eagle/Envoy P 4 4 American Eagle/Mesa P 1 -- Asiana Cargo C 12 7 Atlas Air C 11 20 CargoLogicAir C 1 1 Cargolux Airlines C 10 13 Cargolux Italia C 5 -- Cathay Pacific Cargo C 5 2 China Airlines Cargo C 16 5 China Southern Cargo C 17 12 Delta Air Lines P 10 6 Emirates SkyCargo C 3 3 Ethiopian Airlines P 1 -- Etihad Cargo P 1 -- EVA Air Cargo C 7 2 FedEx C 64 47 Frontier Airlines P 4 15 General Aviation -- 2 5 Jetblue Airways P 1 13 Kalitta Air C 15 9 Korean Air Cargo C 8 8 LATAM Cargo Chile C 2 -- C 1 3 National Air Cargo C 6 -- Nippon Cargo Airlines C 3 -- Polar Air Cargo C 4 1 Qantas Freight C 5 3 Qatar Airways Cargo C 16 12 Silk Way West Airlines C 8 4 Sky West Aviation P 1 18 Sky Lease Cargo C 1 -- Spirit Airlines P 15 26 Sun Country Airlines P 3 -- Turkish Cargo C 12 6 United Airlines P 61 169 United Express/Air Wisconsin P 2 1 UPS C 39 42 VivaAerobus P 2 -- Volaris P 9 8 Western Global Airlines C 7 3 Total 483 582 Note 1: Passenger Carrier (P) or Dedicated Cargo (C)

Chicago Department of Aviation Page 8 4th Quarter 2020 Nighttime Preferential Flight Track Summary Chicago O'Hare International Airport Period: 4th Quarter 2020 Time of Day: Fly Quiet Mode (FQM)

Runway 22L Departures 4th Quarter 2020 4th Quarter 2019

Airline Average Average Departures Deviation Departures Deviation 1 Name Type (nautical miles) (nautical miles) ABX Air C 10 0.21 -- -- AeroMexico P 12 0.23 25 0.25 AeroUnion C 1 0.16 1 0.39 Air France P 1 0.10 -- -- Air France Cargo C 1 0.34 2 0.10 American Airlines P 61 0.35 99 0.28 American Eagle/Envoy P 1 0.51 20 0.39 Asiana Cargo C 5 0.22 5 0.22 Cargolux Airlines C 2 0.44 6 0.45 Cathay Pacific Cargo C 2 0.97 1 1.97 China Airlines Cargo C 6 0.46 -- -- Delta Air Lines P 29 0.36 9 0.17 Emirates SkyCargo C 4 0.23 4 0.15 Etihad Cargo C 1 2.69 -- -- EVA Air P 3 0.36 -- -- FedEx C 76 0.26 24 0.30 Frontier Airlines P 6 0.42 9 0.40 General Aviation -- 4 0.51 3 0.45 Jetblue Airways P 5 0.27 7 0.38 Kalitta Air C 2 0.62 2 0.62 Korean Air Cargo C 3 0.30 8 0.14 LATAM Cargo Chile C 2 0.15 -- -- Lufthansa Cargo C 3 0.40 -- -- Nippon Cargo Airlines C 2 0.22 1 0.06 Qatar Airways Cargo C 2 0.20 6 0.14 P 2 0.38 6 0.61 P 1 3.17 -- -- Spirit Airlines P 58 0.26 54 0.27 Swiss Air Lines P 2 0.48 -- -- P 1 0.19 -- -- Turkish Cargo C 2 0.23 3 0.24 United Airlines P 38 0.21 18 0.42 United Express/Air Wisconsin P 1 0.55 6 0.26 United Express/Gojet P 3 0.46 9 0.47 UPS C 28 0.37 18 0.33 P 1 0.13 -- -- VivaAerobus P 14 0.45 1 0.65 Volaris P 18 0.57 13 0.40 Western Global Airlines C 2 0.12 1 0.03 Overall 415 0.33 361 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 9 4th Quarter 2020 Nighttime Preferential Flight Track Summary Chicago O'Hare International Airport Period: 4th Quarter 2020 Time of Day: Fly Quiet Mode (FQM)

Runway 28R Departures 4th Quarter 2020 4th Quarter 2019

Airline Average Average Departures Deviation Departures Deviation 1 Name Type (nautical miles) (nautical miles) ABX Air C 19 0.35 -- -- Aerologic C 18 0.29 12 0.37 AeroMexico P 27 0.50 39 0.35 AeroUnion C 8 0.39 -- -- C 4 0.54 -- -- Air China Cargo C 1 0.84 1 0.28 Air France P 7 0.21 -- -- Air France Cargo C 17 0.36 22 0.29 Air Transport International C 7 0.24 -- -- AirBridge Cargo Airlines C 10 0.59 7 0.63 Alaska Airlines P 17 0.36 3 0.12 American Airlines P 181 0.41 174 0.38 American Eagle/Envoy P 1 0.40 49 0.18 Asiana Cargo C 20 0.23 34 0.35 ASL Airlines Belgium C 3 0.45 -- -- Atlas Air C 31 0.37 66 0.31 Boutique Air P 1 2.22 -- -- CargoLogicAir C 1 0.19 13 0.34 Cargolux Airlines C 27 0.42 29 0.44 Cargolux Italia C 11 0.58 4 0.22 Cathay Pacific Cargo C 15 0.31 15 0.46 China Airlines Cargo C 36 0.27 10 0.41 China Southern Cargo C 22 0.47 10 0.48 Copa Airlines P 4 0.69 -- -- Delta Air Lines P 96 0.28 15 0.31 / P 1 0.41 1 0.43 Emirates P 1 0.38 -- -- Emirates SkyCargo C 10 0.31 19 0.31 Etihad Cargo C 7 0.52 -- -- EVA Air P 49 0.48 39 0.52 EVA Air Cargo C 7 0.60 -- -- FedEx C 117 0.28 91 0.24 Frontier Airlines P 24 0.35 30 0.21 General Aviation -- 10 0.74 19 0.32 Jetblue Airways P 5 0.37 32 0.32 Kalitta Air C 23 0.32 12 0.27 Korean Air Cargo C 26 0.34 35 0.34 LATAM Cargo Chile C 6 0.17 -- -- LOT P 14 0.48 21 0.50 Lufthansa P 2 0.51 23 0.39 Lufthansa Cargo C 14 0.42 19 0.47 C 2 0.61 -- -- National Air Cargo C 6 0.26 -- -- Nippon Cargo Airlines C 23 0.31 13 0.36 Polar Air Cargo C 1 0.48 2 0.32 Qantas Freight C 5 0.45 14 0.48 Qatar Airways P 3 0.56 -- -- Qatar Airways Cargo C 39 0.44 34 0.45 Republic Airlines P 8 0.17 8 0.17 Royal Jordanian P 1 0.74 1 0.35 Scandinavian Airlines P 7 0.64 7 0.59 Silk Way West Airlines C 11 0.56 11 0.49 Airlines Cargo C 1 0.11 -- -- Sky Lease Cargo C 1 0.01 5 0.16 Sky West Aviation P 22 0.33 55 0.20 Southern Air C 11 0.62 5 0.61 Spirit Airlines P 72 0.41 37 0.34 Sun Country Airlines P 4 0.15 1 0.16 Suparna Airlines C 8 0.32 10 0.43 Swiss International Airlines P 14 0.35 -- -- Turkish Airlines P 5 0.67 3 0.55 Turkish Cargo C 19 0.63 18 0.40 United Airlines P 131 0.46 64 0.30 United Express/Air Wisconsin P 3 0.16 10 0.43 United Express/Gojet P 4 0.17 13 0.33 UPS C 59 0.21 38 0.17 Virgin Atlantic P 9 0.29 -- -- VivaAerobus P 24 0.50 4 0.24 Volaris P 32 0.41 31 0.42 Volga-Dnepr Airlines C 2 0.52 -- -- Western Global Airlines C 16 0.21 3 0.43 Overall 1,443 0.38 1,231 0.34 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 10 4th Quarter 2020 Nighttime Departure Track Report Chicago O'Hare International Airport Period: 4th Quarter 2020 Time of Day: 10:00 p.m. to 7:00 a.m.

3,359 FQM Departures 527 Non-FQM2 Departures 3,886 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 93% 67% 94% 94% 36% 89% 88% (2,037) 0.5 < 1.0 2% 33%n/a1 n/a1 6%n/a1 5%n/a1 57%n/a1 n/a1 2%n/a1 n/a1 n/a1 10% (424) >1.0 5% 0% 0% 1% 7% 9% 2% (78)

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 11 4th Quarter 2020 Nighttime Noise Complaint Report Chicago O'Hare International Airport Period: 4th Quarter 2020 Time of Day: 10:00 p.m. to 7:00 a.m.

Total Complaints Total Complaints Total Complaints Households Households Households for the Quarter for the Quarter for the Quarter Community1 Community1 Community1 Oct Nov Dec 4Q Oct Nov Dec 4Q Oct Nov Dec 4Q 20 20 20 20 20 20 20 20 20 20 20 20

Addison 1 1 -- 4 Gurnee -- 1 -- 1 Skokie 1 1 1 8 Algonquin ------Hampshire 1 1 1 13 Sleepy Hollow ------Arlington Heights 4 6 2 91 Hanover Park 1 1 1 16 South Elgin 1 1 1 5 Barrington Hills ------Harwood Heights 3 2 2 15 South Holland ------Bartlett 1 2 2 365 Hillside 1 1 1 8 St. Charles -- 1 1 3 Batavia ------Hoffman Estates 1 1 1 36 Unincorporated Cook ------Bensenville -- 1 -- 1 Itasca 4 5 5 431 Villa Park 1 -- 1 2 Berkeley 1 -- -- 1 La Grange Park ------Wayne ------Berwyn ------Libertyville -- 1 -- 2 West Chicago ------Bloomingdale 1 1 2 43 Lincolnwood 1 1 1 8 West Dundee ------Buffalo Grove 1 -- -- 1 Lombard 4 2 2 217 Western Springs 1 1 1 32 Burlington ------Long Grove ------Westmont ------Carol Stream ------Medinah -- 1 -- 2 Wheaton ------Carpentersville 1 1 1 15 Melrose Park ------Wilmette -- 1 -- 1 Chicago 47 53 43 3,489 Montgomery ------Winfield 1 1 1 23 Ward 38 6 10 5 369 Morton Grove 1 -- -- 1 Winnetka ------Ward 39 4 7 7 975 Mount Prospect ------Wood Dale 6 10 6 476 Ward 40 2 1 2 13 Mundelein ------Ward 41 19 17 13 769 Niles 2 2 1 396 Total 167 173 149 7,938 Ward 45 7 7 7 610 Norridge 10 7 6 149 Ward Other 9 11 9 753 Northbrook ------Deerfield ------Northfield ------METHOD OF COMPLAINT Des Plaines 4 4 4 45 Northlake ------Total % of Total Downers Grove ------Oak Park 1 -- -- 1 Website 7,662 96.5% Elburn ------Palatine 1 1 1 10 App 212 2.7% Elgin 1 1 1 37 Park Ridge 12 24 20 410 Telephone 64 0.8% Elk Grove Village 6 7 8 451 Prospect Heights ------Total 7,938 100% Elmhurst 22 14 12 499 River Forest ------NATURE OF COMPLAINT Elmwood Park ------River Grove -- -- 1 1 Evanston 1 1 1 99 Riverside ------Total % of Total Franklin Park 1 1 -- 3 Rolling Meadows ------Aircraft Noise 6,406 80.7% Geneva ------Roselle -- -- 1 5 Low Flying 562 7.1% Vibration 318 4.0% Gilberts 1 1 1 46 Rosemont ------Frequency 652 8.2% Glen Ellyn ------Schaumburg ------Other 0 0.0% Glenview 6 6 8 311 Schiller Park 14 6 8 165 Total 7,938 100% Note 1: Complaints made within the State of Illinois from households with verifiable addresses.

Chicago Department of Aviation Page 12 4th Quarter 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 13 4th Quarter 2020 Nighttime Aircraft Noise Report Chicago O'Hare International Airport Period: 4th Quarter 2020 Time of Day: 10:00 p.m. to 7:00 a.m. Metric: Aircraft Leq

1 Site Last 4 Quarters Monitored Noise Levels Community 4Q 2019 12 Month Avg. # 1Q 2020 2Q 2020 3Q 2020 4Q 2020

1 Arlington Heights 43.8 43.0 39.7 42.2 44.5 42.4 2 Melrose Park 42.0 37.2 36.6 36.0 40.7 38.7 3 Bensenville 55.5 52.2 52.2 54.9 56.8 54.0 4 Schiller Park 45.8 41.0 40.7 41.7 46.8 42.8 5 Chicago 48.1 44.6 45.3 45.1 49.9 46.0 7 Des Plaines 42.1 35.1 34.7 36.5 42.3 38.3 8 Des Plaines 49.1 43.3 41.8 47.1 49.3 46.2 10 Rolling Meadows 38.9 38.7 38.3 39.6 40.8 38.9 11 Chicago 45.6 44.2 43.4 43.5 44.9 44.3 12 Elk Grove Village 48.0 44.4 43.3 46.3 50.1 45.9 13 Elk Grove Village 52.4 42.4 42.3 44.4 53.1 47.7 14 Elk Grove Village 47.4 42.8 45.1 45.0 47.1 45.4 15 Franklin Park 40.7 35.1 36.2 37.8 40.1 38.0 16 Franklin Park 55.5 50.9 48.7 55.0 57.5 53.4 17 Harwood Heights 53.8 53.8 53.8 54.5 54.9 54.0 18 Norridge 50.5 50.1 50.0 50.6 51.2 50.3 19 Stone Park 44.4 35.0 36.1 43.2 46.7 41.4 20 Mount Prospect 44.1 42.3 41.5 42.6 46.8 42.7 21 Mount Prospect 40.2 38.4 37.8 38.0 42.4 38.7 22 Norridge 56.5 57.4 57.6 57.2 57.9 57.2 23 Northlake 53.0 42.5 43.3 49.6 55.8 49.1 24 Park Ridge 45.5 41.7 40.4 42.5 -- 43.0 25 Park Ridge 52.2 47.6 46.8 46.2 53.2 48.9 26 Park Ridge 47.4 42.1 40.3 40.9 48.2 43.7 27 Rosemont 59.0 50.8 50.0 49.0 60.1 54.4 28 Schiller Park 64.8 65.1 64.5 65.2 65.9 64.9 29 Wood Dale 57.7 57.4 57.7 58.8 58.2 57.9 30 Wood Dale 46.3 40.7 40.4 42.5 47.6 43.1 31 Bensenville 61.8 61.3 60.7 60.9 62.7 61.2 32 Wood Dale 55.7 52.7 53.3 55.5 58.1 54.5 33 Park Ridge 49.2 42.9 42.2 47.0 48.0 46.3 34 Elk Grove Village 49.2 46.8 46.8 50.4 52.0 48.6 35 Unincorporated Cook 47.1 36.8 35.7 44.5 48.9 43.4 37 Mount Prospect 37.0 35.2 36.8 37.6 38.4 36.7 42 Chicago 46.6 42.5 41.1 43.4 47.3 43.9 44 Itasca 55.3 55.0 55.2 53.8 55.7 54.9 Note 1: Leq (Equivalent Sound Level): The average sound energy level during a stated period of time. Red represents an increase of 1 dB or more from same quarter of the previous year (0 monitors). Green represents a decrease of 1 dB or more from same quarter of the previous year (29 monitors).

Chicago Department of Aviation Page 14 4th Quarter 2020 Airline Ground Run-Up Report Chicago O'Hare International Airport Period: 4th Quarter 2020 Time of Day: 24 Hours

All Airlines 4th Quarter 2020 3rd Quarter 2020 12 Month Avg. 1 Location Run-ups Percentage Run-ups Percentage Run-ups Percentage GRE 160 91% 195 93% 177 93% Other2 15 9% 14 7% 13 7% Total 175 100% 209 100% 190 100% GRE 23 79% 35 100% 37 90% Other2 6 21% 0 0% 4 10% Total 29 100% 35 100% 41 100% GRE 60 100% 84 100% 67 100% Other2 0 0% 0 0% 0 0% Total 60 100% 84 100% 67 100% GRE 61 100% 55 100% 55 100% Other2 0 0% 0 0% 0 0% Total 61 100% 55 100% 55 100% GRE 11 58% 18 67% 14 67% Other2 8 42% 9 33% 7 33% Total 19 100% 27 100% 21 100% GRE 5 83% 3 38% 4 67% Other Other2 1 17% 5 63% 2 33% Total 6 100% 8 100% 6 100%

Note 1: 12 Month Average equals the average of: 1Q 2020, 2Q 2020, 3Q 2020, and 4Q 2020. Note 2: Alternate locations are approved by FAA Air Traffic on an as needed basis.

Chicago Department of Aviation Page 15 4th Quarter 2020 Aircraft Ground Run-Up Report Chicago O'Hare International Airport Period: 4th Quarter 2020 Time of Day: 24 Hours

4th Quarter 2020 3rd Quarter 2020

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

A220 1 1 100% 0 0 --

A319 1 1 100% 6 6 100%

A320 0 0 -- 4 4 100%

A321 2 1 50% 0 0 --

B737 27 25 93% 39 37 95%

B747 1 0 0% 0 0 --

B757 5 3 60% 8 4 50%

B767 1 1 100% 4 0 0%

B777 10 3 30% 4 2 50%

B787 2 0 0% 1 0 0%

CRJ200/700/900 46 46 100% 33 33 100%

E140/145 43 43 100% 59 59 100%

E170/175 35 35 100% 49 49 100%

MD10/11 0 0 -- 1 0 0%

Other 1 1 100% 1 1 100%

TOTAL 175 160 91% 209 195 93%

Chicago Department of Aviation Page 16 4th Quarter 2020

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