Airport Noise Management System Chicago O Hare International Airport

December 218 Monthly Report Airport Noise Management System Chicago O Hare International Airport Visit the O Hare Noise webpage on the Internet at www.flychicago.com/ordnoise

Airport Noise Management System Monthly Report Report Descriptions Background Installed in 1996, the Airport Noise Management System (ANMS) enables the City of Chicago to monitor the amount of noise being generated over the communities surrounding Chicago O Hare International Airport (O Hare) by the aircraft operating at the Airport. The ANMS collects, analyzes and processes data from a number of sources of information including a network of 36 noise monitors around O Hare, Federal Aviation Administration (FAA) radar data, weather data, and noise complaints. Over 15, flights and 4, noise events are recorded by the ANMS each month for the Chicago Department of Aviation (CDA). The City of Chicago and the O Hare Noise Compatibility Commission (ONCC) utilize data from the ANMS to facilitate the development and management of noise abatement programs at the Airport. The following reports summarize pertinent monthly information from that data concerning the noise levels and operations at the Airport. Aircraft Operations Summary The chart below illustrates the trend in monthly aircraft operations at O Hare. Total monthly operations are based on the FAA s Air Traffic Activity Data System (ATADS). Aircraft Operations by Month Month 29 21 211 212 213 214 215 216 217 218 January 66,45 67,535 7,584 67,893 67,794 59,692 66,597 66,998 66,22 69,419 February 62,259 62,52 6,169 65,58 61,268 61,59 6,242 62,856 6,362 61,563 March 7,435 73,387 76,711 73,4 72,436 73,546 74,17 72,954 7,656 73,836 April 68,57 73,229 72,82 73,492 71,14 73,657 72,927 72,291 69,9 73,515 May 7,195 75,615 74,318 74,947 77,367 76,343 76,329 75,12 73,928 76,489 June 69,8 74,821 76,369 77,262 76,668 77,641 76,26 76,98 75,553 78,37 July 72,98 79,446 79,273 78,481 81,186 83,17 79,679 76,635 77,851 82,54 August 73,81 8,17 79,518 79,941 8,884 8,562 78,895 78,269 8,11 81,64 September 69,43 75,358 73,877 73,561 74,83 73,884 73,56 73,383 73,613 76,666 October 71,755 77,312 75,779 75,932 79,75 78,494 77,47 75,948 76,726 8,875 November 66,938 72,72 69,54 7,146 71,488 71,915 7,466 69,958 71,369 73,2 December 66,996 7,585 7,344 67,95 69,178 72,123 68,928 66,261 71,85 76,3 Total 827,899 882,617 878,798 878,18 883,287 881,933 875,136 867,635 867,49 93,747 Aircraft Fleet Mix Report The Aircraft Fleet Mix Report summarizes the number and type of aircraft operating at O Hare during all hours of the day and during the nighttime hours. In 199, Congress passed the Airport Noise and Capacity Act (ANCA) to create a more comprehensive method for regulating aircraft noise. ANCA tasked the FAA with establishing a national noise policy, as well as substituted advances in quiet engine technology for restrictions on airport operations. These aircraft noise standards are codified in FAA Part 36 regulations, Noise Standards: Aircraft Type and Airworthiness Certification. Aircraft must meet Part 36 standards to receive type or airworthiness certificates to operate in the United States. There are five stages of noise standards for aircraft: Stage 1, Stage 2, Stage 3, Stage 4, and Stage 5. Currently, all aircraft operating at O Hare and within the United States are Stage 3 or 4. These aircraft, such as the Airbus A32 and new Boeing 737 s (B737) use a quieter type of engine that significantly reduces noise at the source. Stage 5 noise standards will apply to new aircraft designed, manufactured, and certificated after December 31, 217. Chicago Department of Aviation Page 1 December 218

Wind Summary Wind is a key factor influencing runway use and operation. Aircraft performance requirements make it necessary for aircraft to take off and land into the wind for safety purposes. Ideally, aircraft should take off and land into the wind as the increased airflow over the wings provides improved lift. The diagram to the right summarizes the percent of wind occurrences by direction based on hourly data from the KORD Automated Surface Observing System (ASOS), which is a joint effort of multiple government agencies. Runway Use Report O Hare has seven runways that are all utilized at different times depending primarily upon the prevailing wind conditions on the airfield, as well as any runway maintenance. The Runway Use Report presents the average percentage of use for each runway for the current month, the previous month, and a 12-month average. The percentage of use for departures and arrivals is shown graphically for each runway. This data is for daytime hours (7 a.m. to 1 p.m.) and for all aircraft types. Also shown is the runway use for nighttime hours (1 p.m. to 7 a.m.). Percentage is a ratio whereas a percentage point (pp) is the difference between two percentages. Departures Arrivals Most used departure runway: 28R 49% Most used arrival runway: 27L 3% 28R departures increased by 7pp from November 218 28C arrivals increased by 4pp from November 218 1L departures decreased by 6pp from November 218 1C arrivals decreased by 5pp from November 218 At O Hare, the primary runways face east to west. In east flow, aircraft depart the primary runways to the east; arriving aircraft approach from the west. Conversely, in west flow, aircraft depart the primary runways to the west and arrivals come from the east. Due to prevailing winds, the FAA Air Traffic Control Tower can sometimes use the same runways for an extended period of time. At times one may notice a shift in the way airplanes fly over an area, and this is usually because the flow of air traffic has changed and different runways are in use. The below graphic represents the percentage difference between the two primary flows during the current month. December 218 WEST FLOW 78% EAST FLOW 22% Chicago Department of Aviation Page 2 December 218

Aircraft Noise Report The Aircraft Noise Report summarizes noise measurements from each of the 36 permanent noise monitors located around the Airport. The data presented summarizes the Day-Night Average Sound Levels (DNL s). DNL is a 24-hour time-averaged sound exposure level with a 1 decibel (db) nighttime (1 p.m. to 7 a.m.) weighting to account for the lower background noise levels during the nighttime hours. The dataset for the current month includes 1,9 monitor-days out of a possible 1,116 monitor-days (98%). The data display the measured aircraft DNL for each month and a comparison to the same month of the previous year, and compares the current month to the 12-month average. The aircraft noise report identifies noise from the existing aircraft operations at O Hare. The modeled values for each monitor are shown for 1997, 2, and the OMP Build-Out Noise Contours. The aircraft noise levels for each monitor vary from month to month. This is primarily due to runways being utilized differently under changing wind conditions. The modeled 65 DNL noise contour at O Hare has shrunk in size consistently since 1979 (right) despite an increase in total aircraft operations because of the replacement of Stage 1 and 2 aircraft with Stage 3 and 4 aircraft mandated by ANCA. Noise Complaint Report The CDA maintains a toll-free noise hotline (1-8-435-9569) and an online service at www.flychicago.com/ordnoise for citizens to express their concern about particular aircraft events or aircraft noise levels in general. The 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 graphs illustrate the nature of complaints during the specified month. Also shown are complaints by month displaying seasonal trends. The chart below illustrates the trend in monthly complaints. These totals only include complaints made within the State of Illinois to the O'Hare Noise Hotline toll-free number or online service. Complaints by Month 1 Month 29 21 211 212 213 214 215 216 217 218 January 86 97 1,349 5,635 1,357 6,321 39,5 359,633 354,185 252,878 February 1,186 968 1,6 3,236 966 7,472 122,83 343,149 337,94 33,499 March 1,69 1,222 1,29 2,175 1,42 11,145 352,846 468,691 466,189 61,588 April 985 1,478 1,99 1,113 1,863 1,961 48,468 459,26 565,697 56,516 May 1,235 1,168 1,192 1,21 1,881 21,436 47,523 415,778 66,591 5,2 June 1,131 1,587 1,34 1,332 2,419 22,566 436,119 483,443 483,252 37,144 July 1,466 1,77 849 1,74 2,28 27,956 382,999 512,849 49,368 3,16 August 1,649 1,358 2,5 1,47 2,296 3,249 42,716 53,447 427,557 31,286 September 1,883 1,29 3,12 993 2,124 32,532 388,767 434,796 476,86 32,37 October 1,514 1,27 3,292 1,366 3,496 33,866 41,379 43,855 519,276 25,912 November 825 1,234 3,443 877 4,763 3,748 351,873 319,437 465,943 23,72 December 1,55 85 4,44 1,16 4,646 32,959 345,168 263,238 33,35 13,822 2 Total Calls 14,858 14,346 24,47 21,497 29,493 268,211 4,58,161 4,967,342 5,522,273 648,672 Note 1: In February 215, a citizen group created a software script to register aircraft noise complaints via the City of Chicago s 311 site. In January 218 and with the support of the ONCC, the City of Chicago implemented a captcha to improve the performance of its 311 system by reducing the number of non-human submissions. Note 2: Data includes complaints submitted only December 1 through December 18, 218. Complaints for December 19 through December 31, 218 are not included due to migration to the new 311 software platform. Chicago Department of Aviation Page 3 December 218

Aircraft Fleet Mix Report Chicago O'Hare International Airport Period: December 218 Regional Aircraft Aircraft Average Average Operations Operations Percent Percent Per Day Per Night of Total of Total (All Hours) (1 p.m. - 7 a.m.) (All Hours) (1 p.m. - 7 a.m.) Percentage of Total Day Night CRJ2/7/9 648 52 26.6% 2.1% E135/E145 323 22 13.2%.9% E17/E175 28 2 11.5%.8% E19 25 2 1.%.1% Narrow-Body Aircraft C28 11 1.5%.% Subtotal 1,287 97 52.7% 4.% A319/32/321 356 51 14.6% 2.1% B717 24 1 1.%.% B737 51 55 2.9% 2.3% B757 38 9 1.6%.4% MD8 13 2.5%.1% Wide-Body Aircraft MD9.%.% Subtotal 941 118 38.6% 4.8% A3 4 2.2%.1% A33 13 1.5%.% A34 1.%.% A35 2.1%.% A38.%.% B747 35 11 1.4%.5% B767 24 5 1.%.2% B777 64 12 2.6%.5% B787 27 3 1.1%.1% DC1 3 1.1%.% MD11 9 4.4%.2% Subtotal 182 39 7.5% 1.6% General Aviation 3 2 1.2%.1% % 2% 4% Total 2,44 256 1% 1% Chicago Department of Aviation Page 4 December 218

Runway Use Report Chicago O'Hare International Airport Period: December 218 Time of Day: 7: a.m. to 1: p.m. Runway Use (7 a.m. to 1 p.m.) Source: Airport Noise Management System (ANMS) Runway Utilization 4L 4R 9L 9R 1L 1C 1R 22L 22R 27L 27R 28L 28C 28R Average Daily Departures December 218 2 134 11 324 9 1 54 November 218 4 25 17 1 265 2 449 12 Month Avg. 1 252 22 24 2 2 394 Average Daily Arrivals December 218 95 18 17 36 32 259 254 1 November 218 3 131 3 1 152 78 276 29 24 1 12 Month Avg. 172 8 1 195 82 248 184 176 2 Departures (7 a.m. to 1 p.m.) Arrivals (7 a.m. to 1 p.m.) 7% 7% 6% 6% 5% 5% 4% 4% 3% 3% 2% 2% 1% 1% % % Percentage Departure Utilization Percentage Arrival Utilization December # December 9 24 1 12 2 28 49 9 1 24 # 3 29 Chicago Department of Aviation Page 5 December 218

Runway Use Report Chicago O'Hare International Airport Period: December 218 Time of Day: 1: p.m. to 7: a.m. Runway Use (1 p.m. to 7 a.m.) Source: Airport Noise Management System (ANMS) Runway Utilization 4L 4R 9L 9R 1L 1C 1R 22L 22R 27L 27R 28L 28C 28R Average Daily Departures December 218 1 11 8 1 24 5 58 November 218 3 13 13 1 19 8 53 12 Month Avg. 3 23 2 2 17 4 46 Average Daily Arrivals December 218 3 1 7 16 63 13 34 9 November 218 1 6 1 1 25 1 49 12 31 11 12 Month Avg. 1 2 12 37 3 46 11 3 9 7% Departures (1 p.m. to 7 a.m.) 7% Arrivals (1 p.m. to 7 a.m.) 6% 6% 5% 5% 4% 4% 3% 3% 2% 2% 1% 1% % % Percentage Departure Utilization Percentage Arrival Utilization December 1 # December 2 9 11 1 43 53 7 5 6 5 1 11 23 # 22 Chicago Department of Aviation Page 6 December 218

Chicago Department of Aviation Page 7 December 218

Aircraft Noise Report (1 of 2) Chicago O'Hare International Airport Period: December 218 Metric: Aircraft DNL Site Community Last 12 Months of Monitored Noise Levels Last 12 Month Modeled Modeled Modeled # Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1 Dec Average 1997 2 OMP Build-Out 18 18 18 18 18 18 18 18 18 18 18 18 17 vs 1997 2 Values Values Values 1 Arlington Heights 58.3 57.4 56.9 55.7 57.8 54.3 56.8 53.6 53.3 55.1 54.3 56.1 53.4 56.1 63. 63. 5.5 2 Melrose Park 58. 6.4 58.8 63.6 63.4 63.2 63.8 62.4 64.9 62.6 62.6 51.7 57.2 62.2 63.4 61. 5.3 3 Bensenville 64.4 66.1 61. 57.3 64.4 62.5 -- -- 64.6 65.7 66.6 65.8 64.7 64.5 71.3 67.3 64.9 4 Schiller Park 55.6 56.7 58.2 58.1 58.9 58. 56.5 57.2 57.9 57. 56.3 56.1 55. 57.3 62.6 62.6 58.8 5 Chicago 59.2 58.7 57.6 59.3 6.8 59.7 59.8 59.5 58.4 59. 58.5 59.6 59.3 59.2 6.8 59.8 61.9 7 Des Plaines 5.6 51.6 52.2 52.3 53. 53. 54.1 54.5 52.6 52.9 53.6 51. 53.5 52.8 65.4 62. 48.5 8 Des Plaines 56.5 56.7 58.1 58.5 59.6 57.7 57.5 62.9 58.8 58.4 58.7 57.6 55.8 58.8 7. 68.8 6.8 1 Rolling Meadows 46.6 46.3 45. 5.1 52.2 51.4 5.3 49.9 48.7 49.9 47.7 49.5 5.2 49.4 59. 6.8 48.9 11 Chicago 52.1 52.2 55.3 55.2 55.9 55.4 54.5 56. 55.2 54.6 54.4 53.2 51.6 54.7 6.9 6.7 5.3 12 Elk Grove Village 58.6 58.4 6.4 6.6 61.4 62.3 62.3 6.6 6.8 6.5 59.8 59.2 57.8 6.6 66.7 62.1 57.6 13 Elk Grove Village 62.4 62.9 65.9 65.7 66.2 66.7 65.6 65.6 65.7 64.8 63.6 63. 63.8 65.1 8. 77.6 64.6 14 Elk Grove Village 58. 55.5 54.1 56.3 54.9 54.6 56.9 56.5 54.4 56.8 56.4 55.5 58. 56. 67.6 65.7 54.5 15 Franklin Park 5.4 51.8 54.2 53.7 54.2 52.7 51.7 52.7 53.7 53.3 53.1 53. 51.2 53. 64.1 62.6 53.6 16 Franklin Park 65.1 63.2 62.5 64. 63.9 64.6 64.6 64.9 64.6 66.9 66.4 66.2 66.3 64.9 72.2 72.1 63.4 17 Harwood Heights 62.2 61.6 62.2 63.1 63.6 63.8 63.4 63.5 63.5 64.3 62.7 62.1 62.9 63.1 66.4 65.4 57.9 18 Norridge 57.4 57.7 6.1 6.3 6.6 6.7 59.3 6.1 6. 59.9 59.3 58.2 -- -- n/a n/a n/a 19 Stone Park 54.4 53.2 53.1 53. 54.4 55. 55. 57.8 57. 58. 56.1 55.8 54.9 55.5 64.7 61.7 51.6 57.27 -- Data unavailable. n/a - Not Applicable 1. Red represents an increase of 1 db or more from the same month of the previous year (7 monitors). Green represents a decrease of 1dB or more from the same month of the previous year (3 monitors). 2. Red represents an increase of 1 db or more from the modeled 1997 noise contour level ( monitors). Green represents a decrease of 1dB or more from the modeled 1997 noise contour level (16 monitors). 3. The following 3 monitor-days were excluded due to high community noise values: Site 1 (1); Site 11 (27-28). 4. The following 3 monitor-days was not available due to malfunction: Site 2 (2,4); Site 3 (3). 5. Data is included for all days where data is collected for greater than 9% of the day. Chicago Department of Aviation Page 8 December 218

Aircraft Noise Report (2 of 2) Chicago O'Hare International Airport Period: December 218 Metric: Aircraft DNL Site Community Last 12 Months of Monitored Noise Levels Last 12 Month Modeled Modeled Modeled # Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1 Dec Average 1997 2 OMP Build-Out 18 18 18 18 18 18 18 18 18 18 18 18 17 vs 1997 2 Values Values Values 2 Mount Prospect 55.8 55.7 52.5 54.3 54.5 59.8 57.3 58.5 58.8 59.2 58.9 52.3 52.3 57.1 63.5 62.4 49.1 21 Mount Prospect 52.3 48.3 49.2 5.8 51.4 5.5 57.5 54.7 49.7 5.8 51. 48.7 54.5 52.1 59.6 58.6 53.6 22 Norridge 64.5 64. 64.6 65.3 66.4 67. 65.9 66.2 66.9 66.9 65.7 64.8 65.9 65.8 69.2 67.7 59.2 23 Northlake 63.8 62.8 61.2 61.6 61.8 62.9 62.9 63.2 61.6 64.8 64.4 65. 63.4 63.2 73.5 69.1 59.6 24 Park Ridge 49.8 49.3 55.1 53.8 56.6 56.2 55.8 57. 55.6 54. 55.2 55.2 52.2 55. 6.3 58.8 5.6 25 Park Ridge 59.1 6.6 63.4 62.8 64.7 63.9 62.9 64.7 64.9 62.9 62.5 62.3 62.8 63.2 69.1 61.8 66.7 26 Park Ridge 56. 55.8 58.6 57.8 6.1 59.5 58.4 6. 59.8 58.9 59.1 57.9 58.5 58.7 64. 61.2 59.5 27 Rosemont 66.2 67.2 7.7 69.9 71.4 71.1 7. 7.8 71. 69.6 69. 68.6 69.3 69.9 73. 67.6 7.2 28 Schiller Park 74.3 73.9 74.2 75. 75.7 76. 75.5 75.8 75.6 74.9 74.5 72.9 75. 74.9 79.6 78.7 67.9 29 Wood Dale 64.1 63.7 67.8 67.5 68.4 68.5 67.8 67.8 68.3 67.2 67. 66.1 66. 67.2 n/a n/a 65.1 3 Wood Dale 58.1 57.5 57.3 57.8 57.5 56.4 55.9 56.5 56. 57.6 57.7 57.7 58.7 57.2 n/a n/a 58.5 31 Bensenville -- -- -- -- -- -- -- 71.4 71.6 71.4 7.8 7.7 -- -- n/a n/a n/a 32 Wood Dale 66.1 65.7 62.2 64.8 64.1 65. 65.1 64.8 63.3 66. 64.5 64.9 66.4 64.8 71.2 66.4 63.8 33 Park Ridge 62.9 62.4 61.6 62.5 63.7 64. 63.9 64.5 63.4 64.4 63.8 64.8 63.6 63.6 n/a n/a 61.9 34 Elk Grove Village 57.9 57.2 55.8 57.7 58.9 58.2 59.3 59.1 57.1 59. 57.6 58.1 59.1 58.1 66.3 61.2 61.4 35 Unincorporated Cook 58.7 57.6 55.6 57. 56.9 56.3 57.7 6.3 57.5 59.3 59.2 58.8 59.6 58.1 7.8 65.4 54.7 37 Mount Prospect 46.9 47.6 49.1 47. 5.7 5.8 57.7 55.2 5.1 52.4 51.3 48.7 52.1 51.9 55.1 57. 5.5 42 Chicago 58.5 59.4 59. -- -- -- -- 6.8 59.6 6.4 58.6 58.7 6.2 59.4 n/a n/a n/a 44 Itasca -- 6.4 66.6 65.6 66.6 66.5 65.1 65.4 66.1 64.7 64.9 63.5 -- -- n/a n/a n/a 47.7 57.27 -- Data unavailable. n/a - Not Applicable 1. Red represents an increase of 1 db or more from the same month of the previous year (3 monitor). Green represents a decrease of 1dB or more from the same month of the previous year (7 monitors). 2. Red represents an increase of 1 db or more from the modeled 1997 noise contour level ( monitors). Green represents a decrease of 1dB or more from the modeled 1997 noise contour level (13 monitors). 3. The following 6 monitor-days were excluded due to high community noise values: Site 2 (19); Site 27 (1,27); Site 28 (3,13); Site 33 (28). 4. The following 14 monitor-days were not available due to malfunction: Site 2 (1-14). 5. Data is included for all days where data is collected for greater than 9% of the day. Chicago Department of Aviation Page 9 December 218

Noise Complaint Report Chicago O'Hare International Airport Period: December 218 Monthly Complaints by Community 1 Nature of Noise Complaints Community Complaints Complainants All Hours Nighttime All Hours Nighttime Addison 1 -- 1 -- All Hours Arlington Heights 124 17 5 5 Bartlett 74 29 3 3 Batavia 19 -- 19 -- Bensenville 1,451 282 9 5 Berkeley 1 -- 1 -- Bloomingdale 24 -- 1 -- Carol Stream 1 -- 1 -- Chicago 4,42 1,3 155 76 Ward 38 74 29 6 5 Ward 39 674 142 31 16 Ward 4 35 9 4 4 Ward 41 2,781 499 29 19 Ward 45 36 233 13 8 Ward Other 416 73 1 6 Ward Unknown 62 18 62 18 Des Plaines 219 123 6 5 Downers Grove 51 15 1 1 Elgin 3 4 3 1 Nighttime - 1: p.m. - 7: a.m. Elk Grove Village 1,951 178 792 118 Elmhurst 46 11 8 5 Elmwood Park 1 -- 1 -- Evanston 667 127 1 1 Franklin Park 6 6 6 6 Geneva 179 66 179 66 Gilberts 55 1 1 1 Glenview 12 1 1 1 Hampshire 25 11 2 1 Hanover Park 656 41 2 1 Harwood Heights 13 -- 2 -- Hillside 9 7 1 1 Itasca 13 2 5 2 Lincolnwood 239 16 3 3 Morton Grove 2 -- 1 -- Niles 341 66 2 1 Norridge 13 1 6 4 Northbrook 1 -- 1 -- Northlake 1 -- 1 -- Palatine 759 122 2 1 Park Ridge 68 114 38 27 Method of Noise Complaint Riverside 2 -- 1 -- Phone.3% Rolling Meadows 22 5 2 1 Internet 99.7% Roselle 57 32 1 1 Total 1% Schaumburg 116 -- 98 -- Schiller Park 22 21 3 2 Notes: Skokie 58 18 3 3 1. Complaints made within the State of Illinois. South Barrington 1 1 1 1 2. Data includes complaints submitted only December 1 through December South Elgin 1 -- 1 -- 18, 218. Complaints for December 19 through December 31, 218 St. Charles 33 3 3 1 are not included due to migration to the new 311 software platform. Unincorporated Cook 16 16 1 1 3. 62 of 155 complainants in Chicago are anonymous. Wayne 1 -- 1 -- 4. 781 of 792 complainants in Elk Grove Village are anonymous. Western Springs 341 56 1 1 5. 179 of 179 complainants in Geneva are anonymous. Winfield 37 7 2 1 6. 96 of 98 complainants in Schaumburg are anonymous. Wood Dale 482 65 27 13 7. 18 of 27 complainants in Wood Dale are anonymous. 2 December 218 Total 13,822 2,494 1,585 36 Previous Month Total 23,72 4,655 3,236 628 4 5 6 3 7 Aircraft Noise 69% Aircraft Noise 7% Frequency of Operations 1% Frequency of Operations 8% Vibration 6% Vibration 6% Other % Low Flying 15% Other % Low Flying 16% Chicago Department of Aviation Page 1 December 218

Chicago Department of Aviation Page 11 December 218

O Hare Noise Hotline: 1-8-435-9569 www.flychicago.com/ordnoise