4th Quarter 2018 Report

Fly Quiet Program Chicago O’Hare International Airport

Visit the O’Hare Noise Webpage on the Internet at www.flychicago.com/ORDNoise 4th Quarter 2018 Report

BACKGROUND

On June 17, 1997, the City of Chicago announced that airlines 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, 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 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 (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 4Q 2018 include:

Average Start Time: 11:03 p.m. Average Stop Time: 5:48 a.m. Average Nightly Time in FQM: 6:45 Average Nightly Operations in FQM: 89

1 Airport Noise Compatibility Planning (14 CFR Part 150)

Chicago Department of Aviation Page 1 4th Quarter 2018 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.

Highlights for 4Q 2018 include:

Departures Arrivals Most used nighttime departure runway: 28R – 50% Most used nighttime arrival runway: 27L – 33% 28R night departures increased by 19pp from 3Q 2018 28C night arrivals increased by 9pp from 3Q 2018 9R night departures decreased by 12pp from 3Q 2018 10C night arrivals decreased 10pp from 3Q 2018 pp = Percentage Points Nighttime operations represent 11% of the overall daily operations

ARRIVAL SUMMARY

A detailed airline summary is provided for the two most-used arrival runways (27L and 28C).

PREFERENTIAL FLIGHT TRACKS

As part of the Fly Quiet Program, the Chicago Department of Aviation 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. A detailed airline deviation summary is provided for the two most-used departure runways (28R and 10L); 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 2018 include:

Categories Percent Deviation

less than 0.5 miles 85% between 0.5 and 1.0 miles 14% greater than 1.0 miles 1%

Chicago Department of Aviation Page 2 4th Quarter 2018 NOISE COMPLAINTS

The Chicago Department of Aviation maintains a toll-free O’Hare noise hotline (1-800-435-9569) and an online service at www.flychicago.com/ORDNoise for citizens to express their concerns about particular incidents or about aircraft noise levels in general. The Nighttime Noise Complaint Report summarizes the number of complaints received and where the complainants were located. The tabular report lists the number of complaints by community as well as the number of individual complainants. The graph illustrates the nature of the complaints during the current quarter. Complaints include all complaints made within the State of Illinois to the O’Hare Noise Hotline toll-free number or online service.

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 35 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 2018 Nighttime Hourly Operations Report Chicago O'Hare International Airport Period: 4th Quarter 2018 Time of Day: 10:00 p.m. to 7:00 a.m.

Average Arrivals and Departures by Hour

25 FQM START FQM STOP 11:03 PM 5:48 AM 20

15 Time In Fly Quiet Mode – 6:45, 89 Operations 10

5

0

5

Average Daily Operations Daily Average 10

15

20 Nighttime – 9:00, 266 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. 4Q18 4Q17 4Q18 4Q17 Arrivals Departures Arrivals Arrivals Departures Departures 12 Mo Avg 12 Mo Avg

Chicago Department of Aviation Page 4 4th Quarter 2018 Runway Use Report Chicago O'Hare International Airport Period: 4th Quarter 2018 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 4Q 2018 1 0 0 14 12 1 0 22 0 0 0 0 6 56 3Q 2018 7 0 0 34 30 2 0 19 0 0 0 0 5 43 12 Month Avg. 3 0 0 23 20 2 0 17 0 0 0 0 4 46 Average Daily Arrivals 4Q 2018 0 0 6 1 9 22 1 0 0 51 13 0 37 12 3Q 2018 0 0 14 3 20 45 5 0 2 45 13 0 28 10 12 Month Avg. 0 0 10 2 12 37 3 0 0 46 11 0 30 9

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 2018 4Q 2018 0 1 # 0

0 0 4 9

0 0

0 12 1 33

0 0 50 11 6 8

5 1 14 24 0 0 0 # 1 0

0 0 20 0 0

Chicago Department of Aviation Page 5 4th Quarter 2018 Runway Use Report Chicago O'Hare International Airport Period: 4th Quarter 2018 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 4Q 2018 0 0 0 2 5 1 0 4 0 0 0 0 5 15 3Q 2018 2 0 0 4 10 2 0 2 0 0 0 0 3 11 12 Month Avg. 1 0 0 3 8 2 0 2 0 0 0 0 4 14 Average Daily Arrivals 4Q 2018 0 0 0 0 7 8 0 0 0 18 0 0 11 10 3Q 2018 0 0 0 0 17 15 0 0 1 15 0 0 7 9 12 Month Avg. 0 0 0 0 11 16 0 0 0 17 0 0 10 8

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 2018 4Q 2018 0 1 # 1

0 0 0 0

0 0

1 7 0 33

0 0 45 15 13 18

15 3 14 20 0 0 0 # 0 0

0 0 13 0 1

Purple denotes Fly Quiet preferential departure and arrival runways.

Chicago Department of Aviation Page 6 4th Quarter 2018 Nighttime Arrival Summary Chicago O'Hare International Airport Period: 4th Quarter 2018 Time of Day: Fly Quiet Mode (FQM)

Runway 27L Arrivals 4th Quarter 2018 4th Quarter 2017 Airline Arrivals Arrivals Name Type1

AeroMexico P 62 101 P 1 5 Air Canada Express/Sky Regional P 2 5 P 1 -- P 68 91 P 339 555 American Eagle/Envoy P 89 38 American Eagle/PSA Airlines P 4 2 C 1 1 P 4 -- Airways C 1 -- P 24 35 P 74 70 P 2 7 FedEx C 6 11 P 73 91 General Aviation -- 14 35 P 65 45 JetBlue Airways P 38 41 C 1 1 Airways C 1 3 Company P 3 -- Republic Airlines P 9 20 Sky West Aviation P 100 122 P 155 216 P 461 694 / P 32 39 United Express/ExpressJet P 9 15 United Express/Gojet P 3 17 United Express/Trans States P 2 12 UPS C 5 15 P 9 -- Wow Air P 3 23 Total 1,661 2,310 Note 1: Passenger Carrier (P) or Dedicated Cargo (C) Percent of Total Carrier Category 4Q18 4Q17 United & American 63% 66% Other Domestic 25% 22% Other International 10% 9% Dedicated Cargo 1% 1% General Aviation 1% 2%

Total 100% 100%

Chicago Department of Aviation Page 7 4th Quarter 2018 Nighttime Arrival Summary Chicago O'Hare International Airport Period: 4th Quarter 2018 Time of Day: Fly Quiet Mode (FQM)

Runway 28C Arrivals 4th Quarter 2018 4th Quarter 2017 Airline Arrivals Arrivals Name Type1

Aerologic C 3 -- AeroMexico P 24 32 Air Canada Express/Sky Regional P 1 2 P 9 11 AirBridge Cargo Airlines C 4 11 Alaska Airlines P 26 13 P 2 -- American Airlines P 158 193 American Eagle/Envoy P 33 11 American Eagle/PSA Airlines P 1 -- P 11 23 Atlas Air C 4 5 CargoLogicAir C 6 -- Airlines C 8 13 Airways P 6 5 Airlines C 8 5 C 3 1 C 6 3 Copa Airlines P 10 14 Delta Air Lines P 26 34 Emirates P 4 7 P 1 -- EVA Air P 2 3 FedEx C 104 94 Frontier Airlines P 22 30 General Aviation -- 7 10 Interjet P 21 12 P 1 -- JetBlue Airways P 12 7 Kalitta Air C 16 20 Lines P 12 12 Cargo C 6 8 National Air Cargo C 1 -- C 1 1 Qantas Airways C 6 5 Qatar Airways Company P 15 15 Republic Airlines P 4 3 P 1 -- P 1 -- Silk Way West Airlines C 2 -- C 1 1 C 3 5 Sky West Aviation P 38 50 Spirit Airlines P 38 61 C 2 6 P 1 7 United Airlines P 274 283 United Express/Air Wisconsin P 7 12 United Express/ASA P 2 2 United Express/Gojet P 2 8 United Express/Trans States P 4 3 UPS C 54 52 Volaris P 4 3 Western Global Airlines C 3 -- Wow Air P 3 -- Total 1,024 1,096 Note 1: Passenger Carrier (P) or Dedicated Cargo (C) Percent of Total Carrier Category 4Q18 4Q17 United & American 51% 52% Other Domestic 12% 13% Other International 13% 13% Dedicated Cargo 23% 21% General Aviation 1% 1%

Total 100% 100%

Chicago Department of Aviation Page 8 4th Quarter 2018 Nighttime Preferential Flight Track Summary Chicago O'Hare International Airport Period: 4th Quarter 2018 Time of Day: Fly Quiet Mode (FQM)

Runway 28R Departures

4th Quarter 2018 4th Quarter 2017 Airline

Average Average Name Type1 Departures Deviation Departures Deviation (nautical miles) (nautical miles) P 2 0.30 2 0.49 Aerologic C 8 0.48 15 0.40 AeroMexico P 56 0.35 84 0.31 Air Canada P 1 0.23 3 0.21 P 10 0.20 8 0.26 AirBridge Cargo Airlines C 21 0.61 35 0.57 Alaska Airlines P 2 0.14 3 0.20 American Airlines P 230 0.35 242 0.30 American Eagle/Envoy P 99 0.23 106 0.19 American Eagle/PSA Airlines P 7 0.15 3 0.17 Asiana Airlines P 66 0.35 87 0.33 Atlas Air C 28 0.31 26 0.29 Avianca P 32 0.39 -- -- P 1 0.15 3 0.41 CargoLogicAir C 9 0.46 1 0.11 Cargolux Airlines C 22 0.43 46 0.38 Cathay Pacific Airways P 16 0.34 32 0.37 C 13 0.28 4 0.11 China Cargo Airlines C 6 0.52 2 0.58 China Southern Airlines C 10 0.46 6 0.36 Copa Airlines P 11 0.23 -- -- Delta Air Lines P 10 0.22 10 0.11 Emirates P 8 0.37 15 0.37 Eva Airways P 43 0.58 62 0.52 FedEx C 81 0.23 133 0.21 Frontier Airlines P 5 0.30 6 0.21 General Aviation -- 17 0.20 22 0.59 Interjet P 42 0.26 51 0.25 JetBlue Airways P 5 0.21 5 0.21 Kalitta Air C 40 0.28 38 0.14 Korean Air Lines P 30 0.29 47 0.35 LOT P 8 0.69 11 0.52 Lufthansa P 5 0.28 12 0.26 C 19 0.40 14 0.30 National Air Cargo C 1 0.78 7 0.36 C 20 0.42 47 0.34 Qantas Airways C 7 0.43 13 0.48 Qatar Airways P 21 0.44 25 0.44 Republic Airlines P 7 0.31 34 0.21 Royal Jordanian P 1 0.79 4 0.46 Scandinavian Airlines P 5 0.22 22 0.37 Silk Way West Airlines C 2 0.57 -- -- Singapore Airlines C 2 0.41 7 0.20 Sky Lease Cargo C 6 0.23 5 0.40 Sky West Aviation P 94 0.23 142 0.19 Spirit Airlines P 27 0.37 49 0.28 Suparna Airlines C 5 0.22 13 0.35 Turkish Airlines P 11 0.44 11 0.42 United Airlines P 81 0.31 192 0.25 United Express/Air Wisconsin P 38 0.23 16 0.18 United Express/ASA P 25 0.33 5 0.09 United Express/Gojet P 3 0.13 24 0.18 United Express/Trans States P 2 0.31 13 0.24 UPS C 30 0.27 92 0.15 Volaris P 12 0.24 13 0.47 Western Global Airlines C 15 0.41 4 0.31 Wow Air P 14 0.38 -- -- Overall 1,392 0.35 1,872 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 Percent of Total Carrier Category Red represents a deviation greater than 1.0 nautical mile 4Q18 4Q17 Note 1: Passenger Carrier (P) or Dedicated Cargo (C) United & American 42% 42% Other Domestic 4% 4% Other International 28% 26% Dedicated Cargo 25% 27% General Aviation 1% 1%

Total 100% 100%

Chicago Department of Aviation Page 9 4th Quarter 2018 Nighttime Preferential Flight Track Summary Chicago O'Hare International Airport Period: 4th Quarter 2018 Time of Day: Fly Quiet Mode (FQM)

Runway 10L Departures

4th Quarter 2018 4th Quarter 2017 Airline

Average Average Name Type1 Departures Deviation Departures Deviation (nautical miles) (nautical miles) Aer Lingus P 2 0.10 2 0.17 Aerologic C 5 0.35 3 0.25 AeroMexico P 25 0.24 16 0.16 Cargo C 1 0.04 1 0.05 Air France P 5 0.16 1 0.16 AirBridge Cargo Airlines C 6 0.22 8 0.10 American Airlines P 45 0.28 38 0.28 American Eagle/Envoy P 6 0.13 5 0.22 American Eagle/PSA Airlines P 11 0.20 -- -- Asiana Airlines P 32 0.16 25 0.15 Atlas Air C 1 0.20 4 0.15 Avianca P 1 0.21 -- -- CargoLogicAir C 4 0.19 -- -- Cargolux Airlines C 14 0.13 7 0.33 Cathay Pacific Airways P 5 0.06 6 0.17 China Airlines C 5 0.19 1 0.30 China Cargo Airlines C 4 0.19 2 0.19 China Southern Airlines C 1 0.02 1 0.25 Copa Airlines P 2 0.10 -- -- Delta Air Lines P 1 0.10 3 0.14 Emirates P 10 0.36 1 0.13 P 7 0.26 -- -- Eva Airways P 1 0.17 12 0.14 FedEx C 23 0.16 48 0.26 Frontier Airlines P 57 0.15 -- -- General Aviation -- 4 0.79 2 0.12 Interjet P 26 0.17 7 0.51 Kalitta Air C 19 0.14 12 0.20 Korean Air Lines P 1 0.34 8 0.13 LOT P 15 0.10 8 0.12 Lufthansa P 5 0.12 7 0.23 Lufthansa Cargo C 2 0.15 8 0.10 National Air Cargo C 6 0.28 3 0.11 Nippon Cargo Airlines C 11 0.25 11 0.22 Norwegian Air UK P 6 0.02 -- -- Qantas Airways C 1 0.18 1 0.02 Qatar Airways P 4 0.19 6 0.13 Scandinavian Airlines P 10 0.09 5 0.26 Silk Way West Airlines C 1 0.11 -- -- Singapore Airlines C 6 0.24 -- -- Sky West Aviation P 2 0.10 14 0.36 Spirit Airlines P 1 0.39 5 0.20 Suparna Airlines C 5 0.12 2 0.10 Turkish Airlines P 8 0.20 4 0.38 United Airlines P 7 0.18 -- -- United Express/Air Wisconsin P 4 0.05 -- -- United Express/ASA P 1 0.04 -- -- United Express/Gojet P 7 0.04 2 0.21 UPS C 3 0.15 30 0.19 Volaris P 13 0.23 1 0.06 Western Global Airlines C 16 0.16 -- -- Wow Air P 6 0.10 -- -- Overall 464 0.18 320 0.19 Green represents a deviation of less than 0.5 nautical miles Orange represents a deviation between 0.5 and 1.0 nautical miles Percent of Total Carrier Category Red represents a deviation greater than 1.0 nautical mile 4Q18 4Q17 Note 1: Passenger Carrier (P) or Dedicated Cargo (C) United & American 18% 18% Other Domestic 13% 3% Other International 39% 34% Dedicated Cargo 29% 44% General Aviation 1% 1%

Total 100% 100%

Chicago Department of Aviation Page 10 4th Quarter 2018 Nighttime Departure Track Report Chicago O'Hare International Airport Period: 4th Quarter 2018 Time of Day: 10:00 p.m. to 7:00 a.m.

2,515 FQM Departures 7,316 Non-FQM2 Departures 9,831 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) < 0.5 100% 100% n/a 92% 94% n/a 49% n/a 90% n/a n/a 90% (2,137) 0.5 < 1.0 0% 0% n/a 6% n/a1 4% n/a 48% n/a 3% n/a n/a1 n/a 9% (341) >1.0 0% 0% n/a 2% 2% n/a 3% n/a 7% n/a n/a 1% (37)

n/a = not applicable Note 1: Runways 10C and 28C 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 2018 Nighttime Noise Complaint Report Chicago O'Hare International Airport Period: 4th Quarter 2018 Time of Day: 10:00 p.m. to 7:00 a.m.

Complaints by Community1 Nature of Noise Complaints

Total Number of Community Complaints Complainants

Addison 16 2 Arlington Heights 345 9 Bartlett 95 4 Bensenville 612 10 Bloomingdale 2 2 Carol Stream 1 1 Chicago 5,485 390 Ward 38 281 26 Low Flying 11% Ward 39 964 39 Ward 40 48 9 Ward 41 2,288 51 Ward 45 1,252 23 Aircraft Noise Frequency of Ward Other 430 20 73% Operations Ward Unknown 222 222 9% Des Plaines 660 9 Downers Grove 40 1 Elgin 15 2 Vibration Elk Grove Village 1,194 729 7% Elmhurst 62 17 Evanston 389 2 Franklin Park 17 16 Geneva 151 61 Not Reported Gilberts 78 1 1% Glen Ellyn 1 1 Glenview 107 7 Hampshire 90 2 Hanover Park 321 3 Harwood Heights 35 4 Hillside 14 3 Itasca 61 11 Lincolnwood 106 3 Lombard 2 2 Medinah 24 2 Mount Prospect 4 2 Niles 404 3 Norridge 109 13 Northbrook 1 1 Oak Park 1 1 Palatine 133 3 Park Ridge 1,027 68 Riverside 2 1 Rolling Meadow 26 1 Roselle 139 4 Schaumburg 39 12 Schiller Park 173 5 Skokie 110 4 South Barrington 3 1 South Elgin 8 3 St. Charles 64 4 Unincorporated Cook 46 1 Wayne 2 1 West Chicago 11 1 West Dundee 31 1 Western Springs 365 2 Winfield 98 2 Wood Dale 504 86

4Q 2018 Total2 13,223 1,514 3Q 2018 Total 24,659 3,437 12 Month Average3 35,641 9,836 1 Only includes complaints made from the State of Illinois. 2 Data includes complaints submitted only December 1 through December 18, 2018. Complaints for December 19 through December 31, 2018 are not included due to migration to the new 311 software platform. 3 12 Month Average equals average of: 1Q 2018, 2Q 2018, 3Q 2018 and 4Q 2018.

Chicago Department of Aviation Page 12 4th Quarter 2018 Chicago Department of Aviation Page 13 4th Quarter 2018 Nighttime Aircraft Noise Report Chicago O'Hare International Airport Period: 4th Quarter 2018 Time of Day: 10:00 p.m. to 7:00 a.m. Metric: Aircraft Leq

1 RMT Last 4 Quarters Monitored Noise Levels Community 4Q 2017 12 Month Avg. # 1Q 2018 2Q 2018 3Q 2018 4Q 2018

1 Arlington Heights 50.9 48.0 43.9 48.2 49.4 48.4 2 Melrose Park 47.7 52.9 53.7 51.0 47.9 51.9 3 Bensenville 56.6 55.1 49.3 57.4 55.5 55.5 4 Schiller Park 46.6 48.9 48.2 47.5 48.3 47.9 5 Chicago 51.6 52.6 52.1 51.1 52.3 51.9 7 Des Plaines 39.1 43.4 44.6 41.9 41.4 42.7 8 Des Plaines 45.5 50.7 53.5 49.5 49.0 50.6 10 Rolling Meadows 38.1 43.0 41.4 41.4 45.1 41.3 11 Chicago 44.8 47.2 47.0 45.4 44.0 46.2 12 Elk Grove Village 50.5 52.0 50.8 50.9 50.7 51.1 13 Elk Grove Village 54.1 56.2 55.9 53.1 55.7 55.0 14 Elk Grove Village 47.5 45.8 46.0 47.4 49.3 46.8 15 Franklin Park 40.0 43.4 42.9 41.8 39.7 42.2 16 Franklin Park 54.2 55.0 56.0 57.7 55.8 56.0 17 Harwood Heights 55.2 59.2 57.0 56.4 58.1 57.2 18 Norridge 51.3 53.2 52.8 51.6 -- -- 19 Stone Park 41.8 42.5 43.8 46.0 42.4 43.8 20 Mount Prospect 47.1 48.0 49.4 49.6 45.4 48.7 21 Mount Prospect 40.0 42.3 41.9 41.6 39.9 41.5 22 Norridge 58.0 59.6 59.8 59.3 59.4 59.2 23 Northlake 53.4 54.2 54.7 57.0 54.5 55.0 24 Park Ridge 41.9 46.2 47.3 44.7 43.7 45.5 25 Park Ridge 53.0 55.2 55.9 54.0 53.3 54.7 26 Park Ridge 45.9 49.8 50.0 48.4 47.1 48.8 27 Rosemont 60.3 62.4 62.4 60.8 60.0 61.6 28 Schiller Park 66.8 68.4 68.7 67.7 68.1 68.0 29 Wood Dale 58.6 61.1 61.0 59.3 58.2 60.1 30 Wood Dale 44.7 46.4 45.8 46.8 48.0 46.0 31 Bensenville -- -- 64.3 63.2 -- -- 32 Wood Dale 57.4 59.5 57.2 58.0 61.4 58.1 33 Park Ridge 50.4 54.2 54.6 54.5 52.2 53.7 34 Elk Grove Village 49.4 50.3 49.6 50.9 51.7 50.1 35 Unincorporated Cook 46.2 46.9 47.3 49.2 48.4 47.5 37 Mount Prospect 38.1 35.1 35.6 37.4 36.8 36.7 42 Chicago 48.3 49.9 53.9 49.1 48.5 50.9 44 Itasca 57.8 59.6 58.7 57.0 -- -- 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 (13 monitors). Green represents a decrease of 1 dB or more from same quarter of the previous year (8 monitors).

Chicago Department of Aviation Page 14 4th Quarter 2018 Airline Ground Run-Up Report Chicago O'Hare International Airport Period: 4th Quarter 2018 Time of Day: 24 Hours

All Airlines 4th Quarter 2018 3rd Quarter 2018 12 Month Avg. 1 Location Run-ups Percentage Run-ups Percentage Run-ups Percentage GRE 268 86% 232 88% 244 86% Other 42 14% 32 12% 40 14% Total 310 100% 264 100% 284 100% GRE 23 70% 55 86% 61 81% Other 10 30% 9 14% 14 19% Total 33 100% 64 100% 75 100% GRE 128 100% 67 99% 71 97% Other 0 0% 1 1% 2 3% Total 128 100% 68 100% 73 100% GRE 72 96% 92 100% 83 97% Other 3 4% 0 0% 3 3% Total 75 100% 92 100% 86 100% GRE 31 57% 15 44% 22 54% Other 23 43% 19 56% 19 46% Total 54 100% 34 100% 41 100% GRE 14 70% 3 50% 7 70% Other Other 6 30% 3 50% 3 30% Total 20 100% 6 100% 10 100%

Ground Run-Up Locations 4Q 2018 Other 14%

GRE 86%

112 Month Average equals the average of: 1Q 2018, 2Q 2018, 3Q 2018, and 4Q 2018 .

Chicago Department of Aviation Page 15 4th Quarter 2018 Aircraft Ground Run-Up Report Chicago O'Hare International Airport Period: 4th Quarter 2018 Time of Day: 24 Hours

4th Quarter 2018 3rd Quarter 2018

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

A300 1 1 100% 0 0 0%

A319 7 4 57% 6 6 100%

A320 6 5 83% 10 8 80%

A321 3 2 67% 2 2 100%

B737 41 35 85% 54 52 96%

B747 0 0 0% 0 0 0%

B757 20 6 30% 10 1 10%

B767 6 1 17% 6 1 17%

B777 1 1 100% 6 1 17%

B787 3 0 0% 6 0 0%

CRJ200/700/900 106 104 98% 96 96 100%

DC10 2 0 0% 2 0 0%

E145 75 75 100% 41 41 100%

E170/175 32 31 97% 25 24 96%

E190 1 1 100% 0 0 0%

MD11 4 0 0% 0 0 0%

MD90 1 1 100% 0 0 0%

Other 1 1 100% 0 0 0%

TOTAL 310 268 86% 264 232 88%

Chicago Department of Aviation Page 16 4th Quarter 2018

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