Fly Quiet Program Chicago O Hare International Airport

3 rd Quarter 211 Report Fly Quiet Program Chicago O Hare International Airport Chicago Department of Aviation Visit the Community Noise Resource Center on the Internet at www.flychicago.com

3 rd Quarter 211 Report Background In 1997, Mayor Richard M. Daley 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 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 Chicago Department of Aviation officials, the O'Hare Noise Compatibility Commission, the airlines, and the general public. The Fly Quiet Report contains detailed information regarding nighttime 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. 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 Nighttime Runway Use Report 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 nighttime hours of 1: p.m. to 7: a.m. The Nighttime Hourly Operations Report compares the arrivals and departures by hour 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 3Q 211 include: Departures Arrivals Most used nighttime departure runway: 32L 42% Most used nighttime arrival runway: 28 29% 32R night departures increased by 4pp from 2Q 211 28 night arrivals increased by 6pp from 2Q 211 1 night departures decreased by 3pp from 2Q 211 1 night arrivals decreased by 7pp from 2Q 211 pp = Percentage Points Nighttime operations represent 11% of the overall daily operations 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. Chicago Department of Aviation Page 1 3rd Quarter 211

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 32L); 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 Flight Track Report measures deviation (in nautical miles) from the preferred flight tracks and is divided into three categories: less than.5 miles between.5 and 1. miles greater than 1. miles Noise Complaints The Chicago Department of Aviation maintains a toll-free O Hare noise hotline (1-8-435-9569) and an on-line service at www.flychicago.com 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 at the bottom of the page 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 on-line feature. 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 Chicago Department of Aviation 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 the 1 hold pad. The 32L hold pad is closed as of February 28, 21. 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 the 32L and 1 hold pads 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. Aircraft Noise The Nighttime Aircraft Noise Report summarizes noise measurements from each of the 33 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 1 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 2 3rd Quarter 211

Nighttime Runway Use Report Period: 3 rd Quarter 211 Time of Day: 1: p.m. to 7: a.m. Runway Use Source: Airport Noise Management System (ANMS) Runway Utilization 4L 4R 9L 9R 1 14L 14R 22L 22R 27L 27R 28 32L 32R Average Daily Departures 3Q 211 6 12 4 1 1 26 11 53 12 2Q 211 8 14 7 2 1 23 1 47 6 12 Month Avg. 6 1 5 1 1 24 12 44 8 Average Daily Arrivals 3Q 211 12 4 42 2 18 7 19 3 44 2 2Q 211 1 4 46 4 23 6 11 2 31 1 12 Month Avg. 9 3 36 2 2 7 16 2 37 1 Departures 7% 6% 5% 4% 3% 2% 1% % Arrivals 7% 6% 5% 4% 3% 2% 1% % Percentage Departure Utilization Percentage Arrival Utilization 9 3Q 211 5 2 3Q 211 4 2 42 11 9 3 13 9 3 27 29 1 1 1 21 8 Chicago Department of Aviation Page 3 3rd Quarter 211

Nighttime Hourly Operations Report Period: 3 rd Quarter 211 Time of Day: 1: p.m. to 7: a.m. Average Departures by Hour 7 6 Count of Total Departures 5 4 3 2 42 41 13 16 45 43 1 5 5 3 3 3 3 2 1 1 1 5 4 1 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. Hour 3Q11 2Q11 12 Month Average* Operations by Hour (%) 2Q 211 1 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. Total Departures 35.6% 1.9% 4.2% 2.4% 2.4% 1.4%.9% 4.1% 38.1% 1% Arrivals 14.7% 11.6% 5.% 2.1% 1.3% 2.1% 8.% 18.6% 36.7% 1% Average Arrivals by Hour 7 Count of Total Arrivals 6 5 4 3 2 1 53 48 27 23 21 22 17 17 8 12 12 7 3 3 2 2 3 3 1 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. Hour 3Q11 2Q11 12 Month Average* * 12 Month Average equals the average of 4Q 21, 1Q 211, 2Q 211, and 3Q 211. Chicago Department of Aviation Page 4 3rd Quarter 211

Nighttime Preferential Flight Track Summary Period: 3 rd Quarter 211 Time of Day: 11: p.m. to 6: a.m. Runway 32L Departures Airline 3rd Quarter 211 Departures Average Deviation (nautical miles) 3rd Quarter 21 Departures Average Deviation (nautical miles) Aeromexico 36.62 28.46 Aeromexico Connect 23.35 --- --- Air Canada 3.31 1 1.29 AirBridge Cargo 1.31 --- --- American Airlines 66.54 33.84 American Eagle 125.52 94.94 Asiana 23.9 18.31 Atlas Air 2.1 8.57 British Airways 11.9 6.24 Cargolux 15.49 14 1.11 Cathay Pacific 22.36 22.14 China Airlines 2.62 --- --- China Cargo Airlines 1.17 6.8 Comair 2.29 --- --- Continental 7.53 39.78 Continental Express/Chautauqua Airlines 26.68 19.95 Delta Air Lines 7.9 9.2 DHL 29.57 16.93 ExpressJet 65.44 33 1.43 FedEx 93.34 9.74 Grupo TACA 16.19 5.39 JetBlue Airways 3 1.23 --- --- Korean Air 16.25 17.14 LAN Cargo 1.3 --- --- LOT Polish Airlines 4.12 3.8 Lufthansa 7.17 --- --- Lufthansa Cargo 9.36 4.75 Nippon Cargo Airlines 34.12 31.2 Qantas Airways 3.28 6.12 Scandinavian Airlines 1.5 --- --- Singapore Air Cargo 1.31 12 1.5 Southern Air 7.14 19.14 Spirit Airlines 37.44 6.68 United 128.48 91.92 United Express/ASA 13.41 8 1.22 United Express/Colgan Air 1.9 --- --- United Express/GoJet 28.42 39 1.4 United Express/Mesa Airlines 17.47 9 1.43 United Express/Shuttle America 32.48 12.68 United Express/SkyWest 19.43 22.67 UPS 15.35 18.56 US Airways 47.56 44.74 USA 3 Airlines 2.64 4.9 World Airways 3.4 --- --- Overall 1,93.36 786.64 Green represents a deviation of less than.5 nautical miles Orange represents a deviation between.5 and 1. nautical miles Red represents a deviation greater than 1. nautical mile Chicago Department of Aviation Page 5 3rd Quarter 211

Nighttime Preferential Flight Track Summary Period: 3 rd Quarter 211 Time of Day: 11: p.m. to 6: a.m. Runway 22L Departures Airline 3rd Quarter 211 Departures Average Deviation (nautical miles) 3rd Quarter 21 Departures Average Deviation (nautical miles) Aeromexico 5.31 2.56 Aeromexico Connect 25.51 --- --- American Airlines 52 1.18 21.47 American Eagle 1.19 41.82 Atlas Air 8 1.1 1.23 Continental Express/Chautauqua Airlines 2.84 9 1.8 DHL 2 1.5 9.58 ExpressJet 4.88 8 1.11 FedEx 2.14 23.5 Singapore Airlines 1.21 --- --- Spirit Airlines 13.72 12.49 United 18 1.31 24 1.7 United Express/ASA 2.85 5.45 United Express/GoJet 7.88 9 1.2 United Express/Mesa Airlines 4.55 8 1.26 United Express/Shuttle America 7.8 1.75 United Express/SkyWest 11.76 11.75 United Express/Trans State Airlines 4 1.1 12.9 UPS 6.92 11.35 US Airways 7 2.16 11 1.58 Overall 199.82 245.79 Green represents a deviation of less than.5 nautical miles Orange represents a deviation between.5 and 1. nautical miles Red represents a deviation greater than 1. nautical mile Chicago Department of Aviation Page 6 3rd Quarter 211

Nighttime Flight Track Report rd Period: 3 Quarter 211 Time of Day: 11: p.m. to 6: a.m. Existing Runways to be Decommissioned Preferential Flight Track Existing Runways Future Runways Runway Departures (in %) versus Deviation (in nautical miles) Deviation 4L 4R 9L 9R 1 <.5 44% % 61% 7%.5 < 1. 12% 67% 11% >1. 44% 33% 28% 21% 9% 14L 14R 22L 22R 27L 27R 28 32L 32R 53% 66% 34% 5% 41% 72% 45% 12% 17% 29% % 27% 11% 3% 35% 17% 37% 5% 32% 17% 25% = not applicable Flight tracks shown until 3,' Mean Sea Level (MSL) Chicago Department of Aviation Page 7 3rd Quarter 211

Nighttime Noise Complaint Report Period: 3 rd Quarter 211 Time of Day: 1: p.m. to 7: a.m. Complaints by Community 1 Community Total Complaints Number of Complainants Arlington Heights 16 4 Bensenville 2 2 Berkeley 2 1 Bloomingdale 1 1 Carpentersville 1 1 Chicago 925 276 Des Plaines 216 25 Elmhurst 313 313 Elmwood Park 1 1 Franklin Park 1 1 Harwood Heights 3 2 Hillside 16 6 Itasca 93 14 Kildeer 7 7 Lake Forest 3 1 Lake Zurich 1 1 Medinah 1 1 Melrose Park 6 2 Mount Prospect 5 7 Niles 1 1 Norridge 8 8 Northfield 1 1 Park Ridge 13 55 Rolling Meadows 9 4 Roselle 6 5 Schiller Park 5 5 Villa Park 4 3 Wood Dale 7 5 Total Complaints 1 2 3 4 5 6 7 8 9 1 3Q 211 Total 1,829 753 2Q 211 Total 1,312 529 12 Month Average 2 1,228 483 Nature of Noise Complaints Low Flying 37% Not Reported % Frequency of Operations 14% Aircraft Noise 47% Vibration 2% 1 Only includes calls made from the State of Illinois. 2 12 Month Average equals average of: 4Q 21, 1Q 211, 2Q 211 and 3Q 211. Chicago Department of Aviation Page 8 3rd Quarter 211

Airline Ground Run-Up Report Period: 3 rd Quarter 211 Time of Day: 24 Hours All Airlines 3rd Quarter 211 2nd Quarter 211 12 Month Avg. 1 Location Run-ups Percentage Run-ups Percentage Run-ups Percentage GRE 178 82% 212 85% 191 84% 1 Hold Pad 39 18% 37 15% 35 16% 32L Hold Pad % % % Total 217 1% 249 1% 226 1% GRE 64 79% 5 75% 45 74% 1 Hold Pad 17 21% 17 25% 16 26% 32L Hold Pad % % % Total 81 1% 67 1% 62 1% GRE 31 1% 57 1% 64 99% 1 Hold Pad % % 1 1% 32L Hold Pad % % % Total 31 1% 57 1% 65 1% GRE 1 % % 1 1% 1 Hold Pad % % % 32L Hold Pad % % % Total 1 % % 1 1% GRE 21 58% 22 54% 25 62% 1 Hold Pad 15 42% 19 46% 15 38% 32L Hold Pad % % % Total 36 1% 41 1% 39 1% GRE 61 9% 83 99% 57 95% Others 1 Hold Pad 7 1% 1 1% 3 5% 32L Hold Pad % % % Total 68 1% 84 1% 6 1% Ground Run-up Locations 3Q 211 1 Hold Pad 18% GRE 82% 1 12 Month Average equals the average of: 4Q 21, 1Q 211, 2Q 211 and 3Q 211 Chicago Department of Aviation Page 9 3rd Quarter 211

Aircraft Ground Run-Up Report Period: 3 rd Quarter 211 Time of Day: 24 Hours 3rd Quarter 211 3rd Quarter 21 Aircraft Run-ups Total Run-ups in GRE Percentage Use of GRE Run-ups Total Run-ups in GRE Percentage Use of GRE A319 4 3 75% 11 5 45% A32 11 7 64% 12 11 92% B737 8 8 1% 1 8 8% B747 3 % 4 1 25% B757 17 6 35% 13 6 46% B767 14 2 14% 9 2 22% B777 2 2 1% 14 3 21% DC9Q 2 % % E135/145 59 59 1% 63 62 98% MD8 53 5 94% 49 47 96% Regional Jet (unspecified type) 43 41 95% 33 32 97% Other 1 % 2 2 1% TOTAL 217 178 82% 22 179 81% Chicago Department of Aviation Page 1 3rd Quarter 211

Nighttime Aircraft Noise Report Period: 3 rd Quarter 211 Time of Day: 1: p.m. to 7: a.m. Metric: Aircraft Leq RMT # Community Last 4 Quarters Monitored Noise Levels 1 4Q 21 1Q 211 2Q 211 3Q 211 3Q 21 12 Month Avg. 1 Arlington Heights 48.8 49.3 54.5 51.1 5.5 51.5 2 Melrose Park 44.1 43.4 45.4 43. 44.9 44.1 3 Bensenville 53.8 51.1 52.1 51. 51.7 52.2 4 Schiller Park 46.3 43.8 42.7 45.6 48.3 44.8 5 Chicago 49.5 49. 5.2 5.4 52.6 49.8 6 2 Chicago 48.7 49.5 -- -- 52.1 5.4 7 Des Plaines 42.6 42.6 45.6 47.5 44.6 45.1 8 Des Plaines 48.5 51.2 52. 5.4 45.9 5.7 1 Rolling Meadows 48.9 48.8 51.2 52.2 5.9 5.6 11 Chicago 45.6 46. 48.9 47.1 46.9 47.1 12 Elk Grove Village 47.9 47.3 48.4 5.2 51.5 48.6 13 Elk Grove Village 62.6 63.4 66. 64.4 68.9 64.3 14 Elk Grove Village 5.7 51. 52.9 53.3 52. 52.1 15 Franklin Park 46.1 46.7 48.3 48.2 48.5 47.4 16 Franklin Park 56.2 51.8 55.3 55.4 56.6 55. 17 Harwood Heights 58.6 65.2 57.7 59. 58.4 61.3 19 Stone Park 42.9 39.7 41.9 4. 41.7 41.3 2 Mount Prospect 51.1 5.2 53. 52.8 51. 51.9 21 Mount Prospect 44.7 45. 47.7 47.3 45.8 46.4 22 Norridge 6.4 59.8 6.6 6.5 6.2 6.3 23 Northlake 55.4 54.1 54.4 54. 55.4 54.5 24 Park Ridge 43.7 43.6 46.4 43.6 47. 44.5 25 Park Ridge 46.1 46.8 47.6 49.7 46.2 47.8 26 Park Ridge 46.4 47.3 49.5 46.7 46.3 47.6 27 Rosemont 54.4 54.5 56.6 54.7 54.2 55.1 28 Schiller Park 7.7 69.8 7. 7.3 7.1 7.2 29 Wood Dale 57.6 58.9 61.3 59.8 58.9 59.6 3 Wood Dale 46.3 44.7 45.8 45.9 45.1 45.7 32 Wood Dale 56.6 54.1 55.5 54.5 54.9 55.3 33 Park Ridge 4. 39.6 42.8 47.8 42.4 43.9 34 Elk Grove Village 46.6 46. 48.5 52.3 46.9 49.1 35 Unincorporated Cook 45.6 41.2 43.3 46.2 43.1 44.5 37 Mount Prospect 45.9 43. 45.3 5.3 42.7 47. 1 Leq (Equivalent Sound Level): The average sound energy level during a stated period of time. 2 RMT 6 was decommissioned on May 5, 211. Red represents an increase of 1 db or more from same quarter of the previous year (11 monitors). Green represents a decrease of 1 db or more from same quarter of the previous year (9 monitors). Chicago Department of Aviation Page 12 3rd Quarter 211

Chicago Department of Aviation O Hare Noise Hotline: 1-8-435-9569 www.flychicago.com