2nd 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 2nd 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 2Q 2018 include:

Average Start Time: 10:53 p.m. Average Stop Time: 5:46 a.m. Average Nightly Time in FQM: 6:53 Average Nightly Operations in FQM: 105

1 Airport Noise Compatibility Planning (14 CFR Part 150)

Chicago Department of Aviation Page 1 2nd 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 2Q 2018 include:

Departures Arrivals Most used nighttime departure runway: 28R – 32% Most used nighttime arrival runway: 10C – 31% 10L night departures increased by 10pp from 1Q 2018 10C night arrivals increased by 10pp from 1Q 2018 28R night departures decreased by 16pp from 1Q 2018 28R night arrivals decreased 16pp from 1Q 2018 pp = Percentage Points Nighttime operations represent 12% of the overall daily operations

ARRIVAL SUMMARY

A detailed airline summary is provided for the two most-used arrival runways (10C and 27L).

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 2Q 2018 include:

Categories Percent Deviation

less than 0.5 miles 89% between 0.5 and 1.0 miles 9% greater than 1.0 miles 2%

Chicago Department of Aviation Page 2 2nd 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 2nd Quarter 2018 Nighttime Hourly Operations Report Chicago O'Hare International Airport Period: 2nd 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 10:53 PM 5:46 AM 20

15 Time In Fly Quiet Mode – 6:53, 105 Operations 10

5

0

5

Average Daily Operations Daily Average 10

15

20 Nighttime – 9:00, 292 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. 2Q18 2Q17 2Q18 2Q17 Arrivals Arrivals Departures Departures

Chicago Department of Aviation Page 4 2nd Quarter 2018 Runway Use Report Chicago O'Hare International Airport Period: 2nd 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 2Q 2018 2 0 0 30 28 3 0 17 0 0 0 0 2 40 1Q 2018 0 0 0 14 11 2 0 11 0 0 0 0 5 43 12 Month Avg. 3 0 0 19 17 2 0 16 0 0 0 0 4 43 Average Daily Arrivals 2Q 2018 0 1 13 3 13 52 3 0 0 37 11 0 28 8 1Q 2018 0 0 7 1 7 28 1 0 0 51 6 0 28 7 12 Month Avg. 0 2 8 2 8 34 2 0 4 45 9 0 31 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 2Q 2018 2Q 2018 2 0 # 0

0 0 8 7

0 0

0 24 2 22

0 0 7 32 23 5 16 2 3 31 0 2 0 0 # 0 0 0 14 0 0

Chicago Department of Aviation Page 5 2nd Quarter 2018 Runway Use Report Chicago O'Hare International Airport Period: 2nd 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 2Q 2018 1005113020000212 1Q 2018 000362010000418 12 Month Avg. 200382030000315 Average Daily Arrivals 2Q 2018 000012260001200117 1Q 2018 0000615000230096 12 Month Avg. 02008160031700118

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 2Q 2018 2Q 2018 0 # 3 0

0 0 0 0 0 0

18 0 13 0

0 0 17 33 31 10

6 8 38 16 0 0 0 0 # 0 0 0 1 6 0

Purple denotes Fly Quiet preferential departure and arrival runways.

Chicago Department of Aviation Page 6 revised 2nd Quarter 2018 Nighttime Arrival Summary Chicago O'Hare International Airport Period: 2nd Quarter 2018 Time of Day: Fly Quiet Mode (FQM)

Runway 10C Arrivals 2nd Quarter 2018 2nd Quarter 20172 Airline Arrivals Arrivals Name Type1

Aerologic C 8 -- AeroMexico P 67 21 P 1 6 Air Canada Express/Jazz P 1 -- Air Canada Express/Sky Regional P 3 -- AirBridge Cargo Airlines C 6 7 P 68 13 P 434 143 American Eagle P 39 -- American Eagle/Envoy P 40 19 American Eagle/PSA Airlines P 4 2 P 25 8 C 17 3 CargoLogicAir C 1 -- Airlines C 20 12 Airways P 9 3 C 5 -- C 1 1 P 7 7 P 32 8 P 70 23 Delta Connection/Endeavor Air P 5 2 P 13 1 Eva Airways P 5 2 FedEx C 97 33 Frontier Airlines P 54 20 General Aviation -- 14 3 P 57 10 jetBlue Airways P 35 7 Kalitta Air C 14 4 Lines P 29 14 LOT P 1 1 Cargo C 8 1 National Air Cargo C 1 1 C 6 3 Polar Air Cargo C 1 2 Airways P 3 -- Company P 20 4 Republic Airlines P 40 20 Silk Way Airlines C 2 -- P 1 -- Sky West Aviation P 146 59 Spirit Airlines P 220 57 C 3 1 P 5 1 P 651 190 United Express/ASA P 3 35 United Express/Gojet P 8 6 United Express/Trans States P 19 10 UPS C 48 23 VivaAerobus P 7 -- P 12 3 Western Global Airlines C 6 -- Wow Air P 11 -- Total 2,403 789 Note 1: Passenger Carrier (P) or Dedicated Cargo (C) Note 2: April 2017 is from 11:00 p.m. to 6:00 a.m. Percent of Total Carrier Category 2Q18 2Q17 United & American 58% 61% Other Domestic 19% 16% Other International 12% 10% Dedicated Cargo 10% 12% General Aviation 1% 1%

Total 100% 100%

Chicago Department of Aviation Page 7 2nd Quarter 2018 Nighttime Arrival Summary Chicago O'Hare International Airport Period: 2nd Quarter 2018 Time of Day: Fly Quiet Mode (FQM)

Runway 27L Arrivals 2nd Quarter 2018 2nd Quarter 20172 Airline Arrivals Arrivals Name Type1

AeroMexico P 32 27 Air Canada P 2 3 Air Canada Express/Sky Regional P 1 2 Air Choice One P 1 -- Alaska Airlines P 34 14 American Airlines P 214 177 American Eagle P 28 -- American Eagle/Envoy P 18 19 American Eagle/PSA Airlines P 2 -- Asiana Airlines P 1 -- Atlas Air C 2 1 Copa Airlines P 16 9 Delta Air Lines P 25 25 Delta Connection/Endeavor Air P 1 1 Emirates P 3 -- FedEx C 8 1 Frontier Airlines P 31 19 General Aviation -- 5 4 Interjet P 28 11 JetBlue Airways P 14 14 Qantas Airways P 1 -- Republic Airlines P 20 17 Sky West Aviation P 90 82 Spirit Airlines P 115 48 United Airlines P 391 237 United Express/ASA P 1 58 United Express/Gojet P 7 2 United Express/Trans States P 13 17 UPS C 7 6 VivaAerobus P 3 -- Volaris P 7 9 Western Global Airlines C 1 -- Wow Air P 10 -- Total 1,132 803 Note 1: Passenger Carrier (P) or Dedicated Cargo (C) Note 2: April 2017 is from 11:00 p.m. to 6:00 a.m. Percent of Total Carrier Category 2Q18 2Q17 United & American 69% 76% Other Domestic 20% 16% Other International 9% 7% Dedicated Cargo 2% 1% General Aviation 0% 0%

Total 100% 100%

Chicago Department of Aviation Page 8 2nd Quarter 2018 Nighttime Preferential Flight Track Summary Chicago O'Hare International Airport Period: 2nd Quarter 2018 Time of Day: Fly Quiet Mode (FQM)

Runway 28R Departures 2nd Quarter 2018 2nd Quarter 20172 Airline

Average Average Name Type1 Departures Deviation Departures Deviation (nautical miles) (nautical miles) P 1 0.27 -- -- Aerologic C 13 0.74 4 0.42 AeroMexico P 50 0.35 37 0.31 P 3 0.33 6 0.28 AirBridge Cargo Airlines C 19 0.58 26 0.62 Alaska Airlines P 7 0.31 6 0.26 American Airlines P 147 0.31 168 0.42 American Eagle P 26 0.28 -- -- American Eagle/Envoy P 33 0.18 23 0.28 American Eagle/PSA Airlines P 4 0.38 4 0.28 Asiana Airlines P 42 0.38 45 0.44 Atlas Air C 24 0.32 21 0.33 P 1 1.18 2 0.26 Cargolux Airlines C 18 0.43 20 0.53 Cathay Pacific Airways P 16 0.40 10 0.52 China Airlines C 3 0.22 -- -- China Cargo Airlines C 9 0.34 2 0.37 China Southern Airlines C 1 0.40 -- -- Copa Airlines P 2 0.19 -- -- Delta Air Lines P 7 0.24 5 0.19 Delta Connection P 2 0.20 1 0.50 Emirates P 14 0.52 13 0.41 Eva Airways P 27 0.58 32 0.53 FedEx C 64 0.30 41 0.36 Frontier Airlines P 10 0.31 3 0.59 General Aviation -- 9 0.35 4 0.21 Interjet P 48 0.35 25 0.43 jetBlue Airways P 6 0.34 5 0.17 Kalitta Air C 16 0.23 5 0.37 Korean Air Lines P 17 0.30 20 0.31 LOT P 12 0.59 2 0.49 Lufthansa P 21 0.58 21 0.45 C 10 0.45 8 0.34 C 1 0.85 -- -- National Air Cargo C 2 0.15 1 0.66 Nippon Cargo Airlines C 25 0.43 19 0.47 Norwegian Air UK P 1 0.62 -- -- Qantas Airways P 11 0.42 10 0.40 Qatar Airways P 21 0.45 8 0.54 Republic Airlines P 9 0.29 17 0.21 P 9 0.36 13 0.50 Silk Way West Airlines C 4 0.58 -- -- Singapore Airlines P 1 0.38 -- -- Sky West Aviation P 37 0.26 103 0.31 Spirit Airlines P 56 0.31 47 0.34 Suparna Airlines C 4 0.18 4 0.38 Turkish Airlines P 9 0.63 3 0.71 United Airlines P 118 0.27 111 0.32 United Express/ASA P 3 0.39 15 0.20 United Express/Gojet P 7 0.15 18 0.20 United Express/Trans States P 7 0.26 2 0.18 UPS C 25 0.20 20 0.30 Volaris P 9 0.33 15 0.50 Western Global Airlines C 8 0.24 1 0.10 Wow Air P 21 0.44 -- -- Overall 1,070 0.38 966 0.38 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 2Q18 2Q17 Note 1: Passenger Carrier (P) or Dedicated Cargo (C) United & American 37% 48% Note 2: April 2017 is from 11:00 p.m. to 6:00 a.m. Other Domestic 8% 7% Other International 31% 27% Dedicated Cargo 23% 18% General Aviation 1% 0%

Total 100% 100%

Chicago Department of Aviation Page 9 2nd Quarter 2018 Nighttime Preferential Flight Track Summary Chicago O'Hare International Airport Period: 2nd Quarter 2018 Time of Day: Fly Quiet Mode (FQM)

Runway 10L Departures 2nd Quarter 2018 2nd Quarter 20172 Airline

Average Average Name Type1 Departures Deviation Departures Deviation (nautical miles) (nautical miles) Aerologic C 12 0.20 2 0.11 AeroMexico P 52 0.24 30 0.28 Air Canada P 1 0.13 1 0.19 Air France P 6 0.12 3 0.30 P 1 0.29 -- -- AirBridge Cargo Airlines C 19 0.30 20 0.18 Alaska Airlines P 7 0.13 1 0.02 American Airlines P 124 0.24 77 0.27 American Eagle P 17 0.23 -- -- American Eagle/Envoy P 17 0.20 6 0.60 American Eagle/PSA Airlines P 3 0.27 3 0.29 Asiana Airlines P 57 0.26 46 0.22 Atlas Air C 23 0.15 20 0.20 P 1 0.32 -- -- Cargolux Airlines C 23 0.23 15 0.16 Cathay Pacific Airways P 22 0.41 16 0.30 China Airlines C 5 0.18 1 0.10 China Cargo Airlines C 6 0.22 1 0.15 China Southern Airlines C 2 0.11 2 0.13 Copa Airlines P 5 1.01 -- -- Emirates P 7 0.16 10 0.22 Eva Airways P 37 0.14 32 0.16 FedEx C 84 0.19 62 0.35 Frontier Airlines P 12 0.19 5 0.12 General Aviation -- 7 0.15 1 1.50 Airlines P 1 0.30 -- -- Interjet P 44 0.21 25 0.25 Jetblue Airways P 6 0.14 3 0.25 Kalitta Air C 26 0.24 3 0.11 Korean Air Lines P 14 0.15 13 0.17 LOT P 17 0.15 3 0.12 Lufthansa P 32 0.13 26 0.40 Lufthansa Cargo C 9 0.12 8 0.16 National Air Cargo C 3 0.26 1 0.18 Nippon Cargo Airlines C 24 0.25 25 0.20 Norwegian Air UK P 4 0.13 -- -- Polar Air Cargo C 1 0.32 1 0.17 Qantas Airways P 9 0.16 6 0.13 Qatar Airways P 15 0.16 11 0.15 Republic Airlines P 8 0.14 11 0.99 Scandinavian Airlines P 7 0.20 9 0.74 Silk Way West Airlines C 4 0.42 -- -- Singapore Airlines P 5 0.18 -- -- Sky West Aviation P 29 0.15 38 0.45 Spirit Airlines P 32 0.16 21 0.23 Suparna Airlines C 1 0.04 2 0.60 Turkish Airlines P 9 0.42 2 0.11 United Airlines P 60 0.24 49 0.37 United Express/ASA P 2 0.29 8 0.75 United Express/Gojet P 4 0.20 10 0.15 United Express/Trans States P 2 0.17 3 0.41 UPS C 36 0.18 25 0.35 Volaris P 6 0.61 17 0.16 Western Global Airlines C 5 0.17 -- -- Wow Air P 29 0.26 -- -- Overall 994 0.23 674 0.30 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 2Q18 2Q17 Note 1: Passenger Carrier (P) or Dedicated Cargo (C) United & American 27% 30% Note 2: April 2017 is from 11:00 p.m. to 6:00 a.m. Other Domestic 6% 5% Other International 38% 37% Dedicated Cargo 28% 28% General Aviation 1% 0%

Total 100% 100%

Chicago Department of Aviation Page 10 2nd Quarter 2018 Nighttime Departure Track Report Chicago O'Hare International Airport Period: 2nd Quarter 2018 Time of Day: 10:00 p.m. to 7:00 a.m.

2,803 FQM Departures 8,336 Non-FQM2 Departures 11,139 Total Departures

Preferential Flight Track Existing Runways Existing Runways Future Runways to be Decommissioned

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 88% 40% n/a 95% 94% n/a 40% n/a 100% n/a n/a 90% (2,490) 0.5 < 1.0 10% 40% n/a 3%n/a1 3% n/a 56% n/a 0% n/an/a1 n/a 8% (247) >1.0 2% 20% n/a 2% 3% n/a 4% n/a 0% n/a n/a 2% (66)

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 2nd Quarter 2018 Nighttime Noise Complaint Report Chicago O'Hare International Airport Period: 2nd 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 55 3 Arlington Heights 432 6 Barrington 6 3 Bartlett 64 7 Bensenville 739 27 Berkeley 1 1 Berwyn 2 1 Low Flying Bloomingdale 100 14 9% Carol Stream 8 2 Chicago 10,488 400 Frequency of Ward 38 924 40 Operations Ward 39 1,643 55 5% Ward 40 157 14 Ward 41 3,769 121 Aircraft Noise Vibration Ward 45 3,095 42 80% 6% Ward Other 804 34 Ward Unknown 96 94 Des Plaines 983 350 Downers Grove 108 1 Elgin 30 8 Elk Grove Village 2,935 1,254 Elmhurst 128 35 Not Reported Elmwood Park 3 2 1% Evanston 468 2 Franklin Park 36 4 Geneva 309 290 Gilberts 195 2 Glen Ellyn 5 3 Glendale Heights 1 1 Glenview 171 10 Hanover Park 581 4 Harwood Heights 16 8 Hillside 9 2 Hoffman Estates 5 1 Itasca 1,614 17 La Grange Park 2 2 Lincolnwood 240 3 Lombard 3 2 Medinah 2,479 48 Melrose Park 1 1 Montgomery 1 1 Morton Grove 2 2 Mount Prospect 8 3 Niles 483 4 Norridge 565 22 Northbrook 33 3 Palatine 9 4 Park Ridge 2,008 148 River Forest 28 28 River Grove 1 1 Roselle 377 10 Rosemont 5 2 Schaumburg 1,351 1,069 Schiller Park 516 10 Skokie 130 6 Sleepy Hollow 5 1 South Barrington 31 5 South Elgin 5 5 St. Charles 13 2 Unincorporated Cook 179 1 Villa Park 1 1 Wayne 18 4 West Chicago 29 5 West Dundee 118 3 Western Springs 31 1 Westmont 2 1 Wheaton 13 2 Wilmette 2 1 Winfield 84 45 Winnetka 1 1 Wood Dale 2,491 1,070 Community Unknown 28 28

2Q 2018 Total 30,785 5,003 1Q 2018 Total 73,897 29,389 12 Month Average2 234,463 66,775 1 Only includes calls made from the State of Illinois. 2 12 Month Average equals average of: 3Q 2017, 4Q 2017, 1Q 2018 and 2Q 2018.

Chicago Department of Aviation Page 12 2nd Quarter 2018 Chicago Department of Aviation Page 13 2nd Quarter 2018 Nighttime Aircraft Noise Report Chicago O'Hare International Airport Period: 2nd 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 2Q 2017 12 Month Avg. # 3Q 2017 4Q 2017 1Q 2018 2Q 2018

1 Arlington Heights 45.4 49.4 50.9 48.0 49.4 48.9 2 Melrose Park 51.5 47.9 47.7 52.9 50.4 50.6 3 Bensenville 54.6 55.5 56.6 55.1 54.7 55.5 4 Schiller Park 47.7 48.3 46.6 48.9 47.8 47.9 5 Chicago 58.0 52.3 51.6 52.6 53.9 54.5 7 Des Plaines 41.6 41.4 39.1 43.4 40.4 41.6 8 Des Plaines 53.6 49.0 45.5 50.7 50.4 50.6 10 Rolling Meadows 46.8 45.1 38.1 43.0 49.0 44.3 11 Chicago 48.3 44.0 44.8 47.2 46.8 46.4 12 Elk Grove Village 49.1 50.7 50.5 52.0 53.3 50.7 13 Elk Grove Village 57.2 55.7 54.1 56.2 58.8 55.9 14 Elk Grove Village 46.2 49.3 47.5 45.8 51.4 47.4 15 Franklin Park 41.8 39.7 40.0 43.4 42.1 41.5 16 Franklin Park 55.7 55.8 54.2 55.0 54.8 55.2 17 Harwood Heights 58.4 58.1 55.2 59.2 57.2 58.0 18 Norridge -- -- 51.3 53.2 -- -- 19 Stone Park 40.0 42.4 41.8 42.5 41.8 41.8 20 Mount Prospect 42.7 45.4 47.1 48.0 45.6 46.2 21 Mount Prospect 38.9 39.9 40.0 42.3 41.7 40.5 22 Norridge 62.3 59.4 58.0 59.6 59.8 60.1 23 Northlake 56.7 54.5 53.4 54.2 54.7 54.9 24 Park Ridge 47.1 43.7 41.9 46.2 46.5 45.2 25 Park Ridge 54.3 53.3 53.0 55.2 54.5 54.1 26 Park Ridge 47.2 47.1 45.9 49.8 48.6 47.8 27 Rosemont 60.7 60.0 60.3 62.4 61.2 60.9 28 Schiller Park 67.6 68.1 66.8 68.4 68.3 67.8 29 Wood Dale 60.0 58.2 58.6 61.1 60.2 59.6 30 Wood Dale 46.2 48.0 44.7 46.4 46.7 46.5 32 Wood Dale 60.0 61.4 57.4 59.5 57.9 59.8 33 Park Ridge 52.6 52.2 50.4 54.2 52.4 52.6 34 Elk Grove Village 50.0 51.7 49.4 50.3 51.2 50.4 35 Unincorporated Cook 48.0 48.4 46.2 46.9 48.5 47.5 37 Mount Prospect 37.7 36.8 38.1 35.1 36.7 37.1 42 Chicago 48.9 48.5 48.3 49.9 49.1 48.9 44 Itasca -- -- 57.8 59.6 -- -- 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 (10 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 2nd Quarter 2018 Airline Ground Run-Up Report Chicago O'Hare International Airport Period: 2nd Quarter 2018 Time of Day: 24 Hours

All Airlines 2nd Quarter 2018 1st Quarter 2018 12 Month Avg. 1 Location Run-ups Percentage Run-ups Percentage Run-ups Percentage GRE 258 83% 216 86% 168 57% Other 51 17% 35 14% 125 43% Total 309 100% 251 100% 293 100% GRE 95 79% 70 85% 55 57% Other 25 21% 12 15% 41 43% Total 120 100% 82 100% 96 100% GRE 50 89% 40 98% 30 56% Other 6 11% 1 2% 24 44% Total 56 100% 41 100% 54 100% GRE 86 93% 80 98% 61 68% Other 6 7% 2 2% 29 32% Total 92 100% 82 100% 90 100% GRE 22 65% 21 51% 16 43% Other 12 35% 20 49% 21 57% Total 34 100% 41 100% 37 100% GRE 5 71% 5 100% 6 35% Other Other 2 29% 0 0% 11 65% Total 7 100% 5 100% 17 100%

Ground Run-Up Locations 2Q 2018 Other 17%

GRE 83%

112 Month Average equals the average of: 3Q 2017, 4Q 2017, 1Q 2018 and 2Q 2018 .

Chicago Department of Aviation Page 15 2nd Quarter 2018 Aircraft Ground Run-Up Report Chicago O'Hare International Airport Period: 2nd Quarter 2018 Time of Day: 24 Hours

2nd Quarter 2018 1st 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

A319 8 6 75% 5 4 80%

A320 5 3 60% 10 8 80%

B737 114 97 85% 88 75 85%

B747 0 0 0% 0 0 0%

B757 10 9 90% 15 4 27%

B767 4 0 0% 4 0 0%

B777 4 0 0% 2 1 50%

B787 12 2 0% 0 0 0%

CRJ200/700/900 84 80 95% 57 55 96%

DC9Q 0 0 0% 0 0 0%

E135/145/175 64 57 89% 66 65 98%

MD80 3 3 100% 3 3 100%

Other 1 1 100% 1 1 100%

TOTAL 309 258 83% 251 216 86%

Chicago Department of Aviation Page 16 2nd Quarter 2018

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