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3rd Quarter 2020 Report

Fly Quiet Program O’Hare International Airport

Visit the O’Hare Noise Webpage on the Internet at www.flychicago.com/oharenoise 3rd Quarter 2020 Report

BACKGROUND

On June 17, 1997, the City of Chicago announced that operating at 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 Chicago Department of Aviation 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 (FQM)

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, 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 3Q 2020 include:

Average Start Time: 10:14 p.m. Average Stop Time: 6:42 a.m. Average Nightly Time in FQM: 8:28 Average Nightly Operations in FQM: 68

OPERATIONS

O’Hare has seven 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 3rd Quarter 2020 Highlights for 3Q 2020 include:

Departures Arrivals Most used nighttime departure runway: 28R – 40% Most used nighttime arrival runway: 28C – 32% 9R night departures increased by 9pp from 2Q 2020 27L night arrivals increased by 6pp from 2Q 2020 10L night departures decreased by 11pp from 2Q 2020 10C night arrivals decreased by 3pp from 2SQ 2020 pp = Percentage Points

Nighttime operations represent 6% of the overall daily operations

Percent of Carrier Category Total United & American 27% Other Domestic 17% Other International 8% Dedicated Cargo 47% General Aviation 1% FQM Total 100%

ARRIVAL SUMMARY

A detailed summary is provided for the two most-used arrival runways (10C and 28C).

PREFERENTIAL FLIGHT TRACKS

As part of the Fly Quiet Program, the Chicago Department of Aviation 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 (10L 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 3Q 2020 include:

Categories Percent Deviation

less than 0.5 miles 87% between 0.5 and 1.0 miles 10% greater than 1.0 miles 3%

Chicago Department of Aviation Page 2 3rd 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 on one of the three identified 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 3rd Quarter 2020 Nighttime Hourly Operations Report Chicago O'Hare International Airport Period: 3rd 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 6:42 AM 25

20 Average Fly Quiet Duration – 8:28, 68 Operations 15

10

5

0

5 Average Average Daily Operations 10

15

20 Nighttime Duration – 9:00, 80 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. 3Q20 Arrivals 3Q19 Arrivals Arrivals 12 Month Avg. 3Q20 Departures 3Q19 Departures Departures 12 Month Avg.

Chicago Department of Aviation Page 4 3rd Quarter 2020 Runway Use Report Chicago O'Hare International Airport Period: 3rd 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 9R 10L 10C 10R 22L 22R 27L 27R 28L 28C 28R Average Daily Departures 3Q 2020 0 0 0 3 6 5 0 1 0 1 0 0 5 14 2Q 2020 0 0 0 0 10 5 0 1 0 0 0 0 5 13 12 Month Avg. 1 0 0 8 10 3 0 13 0 0 0 0 6 42 Average Daily Arrivals 3Q 2020 0 0 0 1 4 14 0 0 1 8 0 0 14 3 2Q 2020 0 0 0 0 4 16 0 0 0 5 1 0 16 4 12 Month Avg. 0 1 3 1 5 20 0 0 5 30 6 0 38 6

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 3Q 2020 3Q 2020 0 1 # 2

0 0 0 0

0 0

2 9 3 17

0 0 39 18 8 8

15 13 30 32 0 0 0 # 0 0

0 0 3 0 0

Chicago Department of Aviation Page 5 3rd Quarter 2020 Runway Use Report Chicago O'Hare International Airport Period: 3rd Quarter 2020 Time of Day: Fly Quiet Mode (FQM)

Runway Use (FQM) Source: Airport Noise Management System (ANMS) Runway Utilization 4L 4R 9L 9R 10L 10C 10R 22L 22R 27L 27R 28L 28C 28R Average Daily Departures 3Q 2020 0 0 0 3 5 4 0 1 0 1 0 0 5 11 2Q 2020 0 0 0 2 7 4 0 1 0 0 0 0 3 9 12 Month Avg. 1 0 0 2 5 2 0 3 0 0 0 0 4 12 Average Daily Arrivals 3Q 2020 0 0 0 1 3 12 0 0 1 6 0 0 12 3 2Q 2020 0 1 0 0 3 11 0 0 0 2 0 0 10 3 12 Month Avg. 0 2 0 0 4 10 0 0 4 9 0 0 16 5

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 3Q 2020 3Q 2020 0 0 # 2

0 0 0 0

0 0

2 9 3 15

0 0 36 18 9 8

17 15 31 32 0 0 0 # 0 0

0 0 3 0 0

Purple denotes Fly Quiet preferential departure and arrival runways.

Chicago Department of Aviation Page 6 3rd Quarter 2020 Nighttime Arrival Summary Chicago O'Hare International Airport Period: 3rd Quarter 2020 Time of Day: Fly Quiet Mode (FQM)

Runway 10C Arrivals 3rd Quarter 2020 3rd Quarter 2019 Airline Arrivals Arrivals Name Type1 ABX Air C 20 -- Aerologic C 6 8 AeroMexico P 6 60 AeroUnion C 1 -- P 2 1 Cargo C 1 1 P 17 -- Air Transport International C 46 -- AirBridge Cargo Airlines C 8 4 P 51 74 P 93 383 American Eagle/Envoy P 28 60 ANA Cargo C 5 -- Asiana Cargo C 12 15 C 25 26 P 11 -- CargoLogicAir C 1 5 Airlines C 15 20 C 1 -- Cargo C 13 7 Airlines Cargo C 12 3 C 1 5 China Southern Cargo C 6 8 P 39 71 SkyCargo C 1 14 Etihad Cargo C 4 -- FedEx C 81 70 P 70 53 General Aviation -- 9 16 P 1 -- C 17 13 Cargo C 24 22 Cargo C 6 -- National Air Cargo C 1 1 C 22 -- C 5 1 Freight C 10 2 Cargo C 17 13 Republic Airlines P 9 21 Silk Way West Airlines C 5 4 C 2 5 Sky West Aviation P 45 147 P 63 141 P 1 -- Turkish Cargo C 15 5 P 158 652 United Express/Gojet P 2 3 UPS C 70 49 VivaAerobus P 3 -- P 30 23 C 8 -- Total 1,099 2,006 Note 1: Passenger Carrier (P) or Dedicated Cargo (C)

Chicago Department of Aviation Page 7 3rd Quarter 2020 Nighttime Arrival Summary Chicago O'Hare International Airport Period: 3rd Quarter 2020 Time of Day: Fly Quiet Mode (FQM)

Runway 28C Arrivals 3rd Quarter 2020 3rd Quarter 2019 Airline Arrivals Arrivals Name Type1 ABX Air C 10 -- Aerologic C 8 2 AeroMexico P 7 46 Air France Cargo C 9 -- Air India P 14 -- Air Transport International C 47 -- AirBridge Cargo Airlines C 7 4 Alaska Airlines P 43 43 P 3 -- American Airlines P 87 258 American Eagle/Envoy P 5 22 ANA Cargo C 10 -- Asiana Cargo C 11 7 Atlas Air C 23 30 Boutique Air P 7 -- Cargolux Airlines C 16 8 Cargolux Italia C 1 -- Cathay Pacific Cargo C 6 2 Cargo C 21 1 China Southern Cargo C 10 5 Delta Air Lines P 49 40 Emirates SkyCargo C 2 4 P 6 -- EVA Air Cargo C 3 3 FedEx C 108 162 Frontier Airlines P 49 38 General Aviation -- 14 7 Japan Airlines P 1 -- Kalitta Air C 23 15 Korean Air Cargo C 30 21 C 7 1 Nippon Cargo Airlines C 27 1 Polar Air Cargo C 5 1 Qantas Freight C 10 5 Qatar Airways Cargo C 23 7 P 3 18 Silk Way West Airlines C 7 2 Sky West Aviation P 30 122 C 1 -- Spirit Airlines P 43 94 Sun Country Airlines P 2 -- C 1 4 Swiss International Airlines P 1 -- Turkish Cargo C 17 3 United Airlines P 168 593 United Express/ P 3 5 United Express/Gojet P 1 5 UPS C 89 116 VivaAerobus P 4 -- Volaris P 38 6 Western Global Airlines C 13 -- Total 1,123 1,701 Note 1: Passenger Carrier (P) or Dedicated Cargo (C)

Chicago Department of Aviation Page 8 3rd Quarter 2020 Nighttime Preferential Flight Track Summary Chicago O'Hare International Airport Period: 3rd Quarter 2020 Time of Day: Fly Quiet Mode (FQM)

Runway 10L Departures 3rd Quarter 2020 3rd Quarter 2019

Airline Average Average Departures Deviation Departures Deviation 1 Name Type (nautical miles) (nautical miles) ABX Air C 9 0.32 -- -- Aerologic C 3 0.09 13 0.26 AeroMexico P 2 0.18 33 0.25 AeroUnion C 1 0.02 -- -- Air France P 3 0.08 -- -- Air France Cargo C 6 0.12 12 0.18 AirBridge Cargo Airlines C 11 0.16 9 0.19 Alaska Airlines P 9 0.18 15 0.17 American Airlines P 68 0.19 160 0.20 ANA Cargo C 1 0.17 -- -- Asiana Cargo C 11 0.33 7 0.21 Atlas Air C 15 0.23 38 0.19 P 1 0.31 2 0.48 Cargolux Airlines C 13 0.20 16 0.25 Cargolux Italia C 1 0.29 -- -- Cathay Pacific Cargo C 10 0.23 10 0.60 China Airlines Cargo C 9 0.31 3 0.12 China Cargo Airlines C 3 0.26 7 0.43 China Southern Cargo C 5 0.12 3 0.12 Delta Air Lines P 17 0.21 4 0.21 Delta Connection/ P 1 0.28 2 0.16 Emirates SkyCargo C 2 0.12 9 0.19 Etihad Cargo C 4 0.14 -- -- EVA Air P 13 0.27 18 0.12 FedEx C 38 0.22 52 0.20 Frontier Airlines P 15 0.16 9 0.43 General Aviation -- 2 0.48 2 0.14 Kalitta Air C 7 0.23 2 0.10 Korean Air Cargo C 11 0.15 15 0.24 LOT P 8 0.11 3 0.10 Lufthansa Cargo C 9 0.19 6 0.19 Nippon Cargo Airlines C 12 0.12 5 0.11 Polar Air Cargo C 1 0.19 -- -- Qantas Freight C 4 0.12 6 0.14 Qatar Airways Cargo C 12 0.10 13 0.11 Republic Airlines P 1 0.17 9 0.26 Silk Way West Airlines C 6 0.35 6 0.19 Sky Lease Cargo C 2 0.25 5 0.11 Sky West Aviation P 5 0.16 21 0.27 Southern Air C 1 0.18 -- -- Spirit Airlines P 6 0.47 22 0.22 Suparna Airlines C 1 0.07 6 0.08 P 2 0.07 -- -- Turkish Cargo C 7 0.31 10 0.19 United Airlines P 50 0.16 46 0.18 United Express/Air Wisconsin P 1 0.22 3 0.19 UPS C 41 0.18 16 0.19 VivaAerobus P 5 0.29 -- -- Volaris P 16 0.26 16 0.16 Western Global Airlines C 13 0.16 4 0.54 Overall 494 0.20 638 0.21

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 3rd Quarter 2020 Nighttime Preferential Flight Track Summary Chicago O'Hare International Airport Period: 3rd Quarter 2020 Time of Day: Fly Quiet Mode (FQM)

Runway 28R Departures 3rd Quarter 2020 3rd Quarter 2019

Airline Average Average Departures Deviation Departures Deviation 1 Name Type (nautical miles) (nautical miles) ABX Air C 15 0.34 -- -- Aerologic C 15 0.63 4 0.57 AeroMexico P 4 0.44 40 0.43 Air Icelandic C 1 0.39 -- -- Air France P 12 0.27 -- -- Air France Cargo C 15 0.44 13 0.29 Air India P 1 0.91 -- -- AirBridge Cargo Airlines C 22 0.50 17 0.55 Alaska Airlines P 42 0.35 9 0.38 American Airlines P 167 0.37 207 0.39 American Eagle/Envoy P 6 0.24 33 0.22 Asiana Cargo C 17 0.25 11 0.29 ASL Airlines Belgium C 2 0.22 -- -- Atlas Air C 27 0.24 42 0.31 CargoLogicAir C 3 0.40 7 0.58 Cargolux Airlines C 25 0.55 17 0.45 Cargolux Italia C 6 0.41 -- -- Cathay Pacific Cargo C 16 0.51 11 0.44 China Airlines Cargo C 15 0.30 4 0.28 China Southern Cargo C 13 0.44 5 0.44 Delta Air Lines P 42 0.28 12 0.21 Emirates P 1 0.28 -- -- Emirates SkyCargo C 2 0.39 11 0.65 Etihad Cargo C 5 0.41 -- -- EVA Air P 18 0.52 23 0.62 FedEx C 64 0.26 51 0.28 Frontier Airlines P 39 0.34 27 0.20 General Aviation -- 8 1.06 8 0.17 P 1 0.44 2 0.39 Kalitta Air C 4 0.30 9 0.31 Korean Air Cargo C 28 0.36 20 0.39 LOT P 7 0.66 1 0.71 Lufthansa Cargo C 14 0.44 3 0.44 Nippon Cargo Airlines C 12 0.40 5 0.50 Polar Air Cargo C 1 0.41 -- -- Qantas Freight C 10 0.50 6 0.48 Qatar Airways P 1 0.50 -- -- Qatar Airways Cargo C 32 0.43 25 0.43 Republic Airlines P 12 0.24 14 0.20 Silk Way West Airlines C 8 0.57 3 0.71 Sky West Aviation P 8 0.24 31 0.28 Southern Air C 6 0.36 -- -- Spirit Airlines P 8 0.46 44 0.35 Sun Country Airlines P 2 0.46 -- -- Suparna Airlines C 1 0.25 3 0.58 Turkish Airlines P 5 0.77 1 0.70 Turkish Cargo C 15 0.66 14 0.49 United Airlines P 118 0.42 102 0.37 UPS C 52 0.25 20 0.16 VivaAerobus P 11 0.59 -- -- Volaris P 25 0.31 12 0.26 Western Global Airlines C 19 0.30 5 0.35 Overall 1,003 0.38 872 0.37 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 3rd Quarter 2020 Nighttime Departure Track Report Chicago O'Hare International Airport Period: 3rd Quarter 2020 Time of Day: 10:00 p.m. to 7:00 a.m.

2,774 FQM Departures 461 Non-FQM2 Departures 3,235 Total Departures

Preferential Flight Track Existing Runways Future Runways

Runway Departures (in %) versus Deviation (in nautical miles) Deviation 4L 4R 9L 9R 10C 10L 10R 22L 22R 27L 27R 28C 28L 28R (# tracks) < 0.5 56% n/a 92% 96% 41% 89% 85% (1,652) 0.5 < 1.0 11% n/a n/a1 5% n/a1 2% n/a1 55% n/a1 7% n/a1 n/a1 n/a1 12% (194) >1.0 33% n/a 3% 2% 4% 4% 3% (54)

n/a = not applicable Note 1: Runways 9L, 10C, 10R, 22R, 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 3rd Quarter 2020 Nighttime Noise Complaint Report Chicago O'Hare International Airport Period: 3rd 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 Jul Aug Sep 3Q Jul Aug Sep 3Q Jul Aug Sep 3Q 20 20 20 20 20 20 20 20 20 20 20 20

Addison ------Glenview 2 3 6 48 Skokie 1 1 1 18 Algonquin ------Gurnee ------Sleepy Hollow ------Arlington Heights 6 2 5 55 Hampshire 1 1 1 26 South Elgin 1 1 1 19 Barrington Hills ------Hanover Park 2 1 1 29 South Holland ------Bartlett 4 2 5 818 Harwood Heights 2 3 4 15 St. Charles 1 -- 1 9 Batavia -- -- 2 2 Hillside -- 1 1 5 Unincorporated Cook ------Bensenville 2 2 1 8 Hoffman Estates 1 1 1 38 Villa Park ------Berkeley ------Itasca 3 7 4 904 Wayne ------Berwyn ------La Grange Park ------West Chicago ------Bloomingdale 1 3 -- 113 Lincolnwood 1 1 1 12 West Dundee ------Buffalo Grove ------Lombard 1 1 1 127 Western Springs -- 1 1 7 Burlington ------Long Grove ------Westmont ------Carol Stream -- 1 -- 2 Medinah ------Wheaton ------Carpentersville 1 1 1 29 Melrose Park ------Wilmette 1 1 -- 2 Chicago 50 55 68 3,375 Montgomery ------Winfield 1 1 1 23 Ward 38 3 7 10 201 Morton Grove ------Winnetka ------Ward 39 6 6 5 740 Mount Prospect ------Wood Dale 8 9 7 315 Ward 40 4 5 5 58 Mundelein -- 1 1 2 Ward 41 19 18 28 580 Niles 3 2 1 400 Total 139 159 174 8,077 Ward 45 9 8 7 1,190 Norridge 5 11 10 291 Ward Other 9 11 13 606 Northbrook 1 -- -- 1 Deerfield -- -- 1 1 Northfield ------METHOD OF COMPLAINT Des Plaines 1 1 5 13 Northlake ------Total % of Total Downers Grove ------Oak Park ------Website 7,737 95.8% Elburn ------Palatine 1 1 1 5 App 265 3.3% Elgin 2 2 3 70 Park Ridge 13 20 15 224 Telephone 75 0.9% Elk Grove Village 4 10 7 620 Prospect Heights ------Total 8,077 100% Elmhurst 7 5 6 188 River Forest ------NATURE OF COMPLAINT Elmwood Park -- 1 -- 1 River Grove ------Evanston 1 1 1 60 Riverside ------Total % of Total Frankfort ------Rolling Meadows ------Aircraft Noise 6,036 74.7% Franklin Park ------Roselle 4 1 1 51 Low Flying 526 6.5% Vibration 492 6.1% Geneva ------Rosemont ------Frequency 1,021 12.7% Gilberts 1 1 1 81 Schaumburg 2 -- -- 3 Other 2 0.0% Glen Ellyn -- 1 -- 1 Schiller Park 4 2 7 66 Total 8,077 100% Note 1: Complaints made within the State of Illinois from households with verifiable addresses.

Chicago Department of Aviation Page 12 3rd 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 Existing Runways

Elk Grove 13

27R 33 Village 22R 34 Future Runways 41 39

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

27L Rosemont Itasca 4L (65 DNL) 32 41 45 Chicago Ward Boundaries

10L 22L 22 17

10C 28 44 29 31 28R Harwood Community Boundaries 28C Schiller Norridge Heights Wood 10R Park Dale 3 18 28L 65 DNL 4R Chicago 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: August 25, 2020 Cook County GIS Department File: ORD_RMT_Vers2.mxd Chicago Department of Aviation Page 13 3rd Quarter 2020 Nighttime Aircraft Noise Report Chicago O'Hare International Airport Period: 3rd 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 3Q 2019 12 Month Avg. # 4Q 2019 1Q 2020 2Q 2020 3Q 2020

1 Arlington Heights 44.5 43.8 43.0 39.7 43.4 43.1 2 Melrose Park 40.7 42.0 37.2 36.6 43.7 39.7 3 Bensenville 56.8 55.5 52.2 52.2 55.3 54.7 4 Schiller Park 46.8 45.8 41.0 40.7 47.2 44.4 5 Chicago 49.9 48.1 44.6 45.3 50.3 47.5 7 Des Plaines 42.3 42.1 35.1 34.7 43.0 39.9 8 Des Plaines 49.3 49.1 43.3 41.8 45.6 47.1 10 Rolling Meadows 40.8 38.9 38.7 38.3 41.3 39.3 11 Chicago 44.9 45.6 44.2 43.4 47.0 44.6 12 Elk Grove Village 50.1 48.0 44.4 43.3 50.1 47.3 13 Elk Grove Village 53.1 52.4 42.4 42.3 55.1 50.1 14 Elk Grove Village 47.1 47.4 42.8 45.1 44.7 46.0 15 Franklin Park 40.1 40.7 35.1 36.2 41.2 38.6 16 Franklin Park 57.5 55.5 50.9 48.7 55.6 54.5 17 Harwood Heights 54.9 53.8 53.8 53.8 56.0 54.1 18 Norridge 51.2 50.5 50.1 50.0 52.8 50.5 19 Stone Park 46.7 44.4 35.0 36.1 43.3 43.1 20 Mount Prospect 46.8 44.1 42.3 41.5 46.0 44.2 21 Mount Prospect 42.4 40.2 38.4 37.8 42.6 40.1 22 Norridge 57.9 56.5 57.4 57.6 59.2 57.4 23 Northlake 55.8 53.0 42.5 43.3 54.1 51.9 24 Park Ridge -- 45.5 41.7 40.4 -- 41.9 25 Park Ridge 53.2 52.2 47.6 46.8 56.2 50.8 26 Park Ridge 48.2 47.4 42.1 40.3 49.1 45.7 27 Rosemont 60.1 59.0 50.8 50.0 62.0 57.1 28 Schiller Park 65.9 64.8 65.1 64.5 67.6 65.1 29 Wood Dale 58.2 57.7 57.4 57.7 60.7 57.8 30 Wood Dale 47.6 46.3 40.7 40.4 46.5 44.8 31 Bensenville 62.7 61.8 61.3 60.7 64.6 61.7 32 Wood Dale 58.1 55.7 52.7 53.3 57.3 55.5 33 Park Ridge 48.0 49.2 42.9 42.2 53.0 46.6 34 Elk Grove Village 52.0 49.2 46.8 46.8 46.0 49.2 35 Unincorporated Cook 48.9 47.1 36.8 35.7 46.3 45.4 37 Mount Prospect 38.4 37.0 35.2 36.8 37.3 37.0 42 Chicago 47.3 46.6 42.5 41.1 48.3 45.1 44 Itasca 55.7 55.3 55.0 55.2 58.2 55.3 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 (32 monitors).

Chicago Department of Aviation Page 14 Revised 3rd Quarter 2020 Airline Ground Run-Up Report Chicago O'Hare International Airport Period: 3rd Quarter 2020 Time of Day: 24 Hours

All Airlines 3rd Quarter 2020 2nd Quarter 2020 12 Month Avg. 1 Location Run-ups Percentage Run-ups Percentage Run-ups Percentage GRE 195 93% 131 98% 199 93% Other2 14 7% 3 2% 14 7% Total 209 100% 134 100% 213 100% GRE 35 100% 29 97% 47 92% Other2 0 0% 1 3% 4 8% Total 35 100% 30 100% 51 100% GRE 84 100% 46 98% 73 100% Other2 0 0% 1 2% 0 0% Total 84 100% 47 100% 73 100% GRE 55 100% 43 100% 59 100% Other2 0 0% 0 0% 0 0% Total 55 100% 43 100% 59 100% GRE 18 67% 8 100% 17 68% Other2 9 33% 0 0% 8 32% Total 27 100% 8 100% 25 100% GRE 3 38% 5 83% 3 60% Other Other2 5 63% 1 17% 2 40% Total 8 100% 6 100% 5 100%

Note 1: 12 Month Average equals the average of: 4Q 2019, 1Q 2020, 2Q 2020, and 3Q 2020. Note 2: Alternate locations are approved by FAA Air Traffic on an as needed basis.

Chicago Department of Aviation Page 15 3rd Quarter 2020 Aircraft Ground Run-Up Report Chicago O'Hare International Airport Period: 3rd Quarter 2020 Time of Day: 24 Hours

3rd Quarter 2020 2nd 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

A319 6 6 100% 7 7 100%

A320 4 4 100% 1 1 100%

B737 39 37 95% 29 29 100%

B747 0 0 -- 1 1 100%

B757 8 4 50% 1 1 100%

B767 4 0 0% 1 0 0%

B777 4 2 50% 1 1 100%

B787 1 0 0% 1 0 0%

CRJ200/700/900 33 33 100% 34 34 100%

MD10/11 1 0 0% 0 0 --

E140/145 59 59 100% 26 25 96%

E170/175 49 49 100% 32 32 100%

Other 1 1 100% 0 0 --

TOTAL 209 195 93% 134 131 98%

Chicago Department of Aviation Page 16 3rd Quarter 2020

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