Portable Noise Monitor Report

Portable Noise Monitor Report Chicago O Hare and Midway International Airports Site 217 1149 Candlewood Drive, Downers Grove May 17, 214 through May 31, 214 Visit the O Hare and Midway Noise Management Webpages on the Internet at www.flychicago.com

Portable Noise Monitor Report City of Chicago Department of Aviation Portable Noise Monitor Report Chicago O Hare and Midway International Airports Site 217 deployed at 1149 Candlewood Drive, Downers Grove May 17, 214 through May 31, 214 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 O Hare and Midway by the aircraft operating at the Airports. The ANMS collects, analyzes and processes data from a number of sources of information including a network of 44 noise monitors around O Hare and Midway, 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 and Midway Noise Compatibility Commission utilize data from the ANMS to facilitate the development and management of noise abatement programs at the Airports. The purpose of the portable noise monitors is to provide aircraft noise information at specific residences that may be of interest to citizens living around the airports. The City also uses this data to supplement the noise data measured by the permanent sites. The following paragraphs summarize pertinent information from the data collected at the portable noise monitoring site. Description of Noise Monitoring Location The noise monitor was placed at 1149 Candlewood Drive, Downers Grove between May 17 and May 31, 214. The monitor is located approximately 12 1/2 miles southwest from the center of O Hare and Chicago Department of Aviation Page 1 October 214

Portable Noise Monitor Report approximately 14 miles west from the center of Midway, as shown on the vicinity map on page 5. The operations that primarily affected this location during the monitoring period were Departures on Runway 28R and Arrivals on 28C from O Hare and Departures on Runway 22L from Midway as shown on the map on page 15. Runway Use Reports O Hare has eight runways that are all utilized at different times depending primarily upon the prevailing wind conditions on the airfield, as well as any runway maintenance. Aircraft performance requirements make it necessary for aircraft to depart and land into the wind for safety purposes. Midway has five runways that are all utilized at different times depending upon the wind conditions at the airport. Aircraft performance makes it necessary for aircraft to take-off and land into the wind for safety and stability. The use of the runways at Midway is important because it effects which communities experience more overflights. The Runway Use Report presents the average daily runway use and the percentage of use for each runway. The percentage of use of each runway is also shown graphically at the bottom of the page for departures and arrivals separately. Noise Level Reports The Noise Level Reports summarizes measurement results at the noise monitoring site. The data presented summarizes the noise levels and the individual measured aircraft events. The noise data presents the measured noise during the period of the measurements for aircraft, community and total noise in 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. Aircraft noise is noise attributable to aircraft operating at O'Hare or Midway. Community noise is noise from all other sources such as highways, railroads as well as background noise. Total noise is both sources combined. The relative noise level of each of these sources is also shown graphically in this report. Chicago Department of Aviation Page 2 October 214

Portable Noise Monitor Report The daily aircraft noise level varies from day to day. This is primarily because different runways are used under different wind conditions which effect where the aircraft fly. The daily noise levels measured, while this monitor was at this location, are only a short sample and are indicative of the levels during the time period when the monitor was installed. It is not necessarily representative of the noise level on an annual basis. The average number of measured aircraft events per day is also summarized in the table for each site. This includes a summary of all measured aircraft events as well as the number of noise level events above 85 db. The total measured aircraft events are also shown graphically in the table on page 12. Top Noise Level Reports The 25 loudest aircraft noise events, while the monitor was at this location, are shown in the attached report with the highest event presented at the top. This report lists the date and time of the noise event, the noise level of the event and the type of aircraft that was identified as causing that event. The noise data presented for each aircraft event is the L max. The L max is the maximum or peak level that the noise reached during the aircraft overflight. When comparing Aircraft Noise Levels to other everyday sounds the L max is the appropriate measure to use. Operational information includes which runway the aircraft used, if it was a departure or arrival (D or A), the airline, and the aircraft type. FAR Part 36 is a government regulation that certifies the noise levels of different aircraft types with Stage 2 generally being the louder aircraft and Stage 3 the quieter aircraft. All louder Stage 2 aircraft weighing more than 75, lbs. were phased out of operation after December 31, 1999. The data shows that the aircraft that generated the highest noise events were usually arrivals by MD-8 s (McDonnell Douglas 8). Aircraft Operations within the Vicinity of the Noise Monitor The map on page 15 shows a graphical representation of traffic that flew within the vicinity of the monitoring location. A virtual gate was established to extend one mile on either side of the monitoring Chicago Department of Aviation Page 3 October 214

Portable Noise Monitor Report location. The day that presented the highest daily level of aircraft noise for the monitoring period was chosen to display. Green tracks represent aircraft that departed O Hare or Midway and red tracks represent arrivals that flew within the vicinity of the monitoring location. Also included in the analysis is a penetration plot showing the altitudes of the aircraft that flew through the established gate. Chicago Department of Aviation Page 4 October 214

Rosemont Legend Roselle 29 Itasca Wood Dale 65 DNL Schiller Park Norridge 1149 Candlewood Drive Downers Grove, IL Skokie OMP Build-Out Noise Contour MDW 218 Noise Contour Bloomingdale Bensenville 294 Community Boundaries Existing Runways Chicago Existing Runways to be Decommissioned Glendale Heights Addison 29 Northlake Franklin Park River Grove Elmwood Park Future Runways Miles 1 2 Stone Park Melrose Park Elmhurst River Forest Chicago Lombard Villa Park Berkeley Bellwood Maywood Oak Park Glen Ellyn 355 Hillside Forest Park 29 Oakbrook Terrace Broadview 88 Westchester North Riverside Berwyn Cicero Oak Brook La Grange Park Brookfield Riverside Lisle 217 Downers Grove 34 Westmont Clarendon Hills Hinsdale 294 Western Springs La Grange McCook Lyons Forest View Stickney 65 DNL 55 Countryside Summit Willowbrook Burr Ridge Hodgkins

Runway Use Report Chicago O'Hare International Airport Period: May 17, 214 to May 31, 214 Time of Day: All Hours Runway Use (All Hours) Source: Airport Noise Management System (ANMS) Runway Utilization 4L 4R 9L 9R 1L 1C 14L 14R 22L 22R 27L 27R 28C 28R 32L 32R Average Daily Operations Departures 24 1 191 289 1 225 1 444 5 3 Arrivals 166 96 27 24 1 4 1 33 159 223 15 Percentage Utilization Departures 2% % % 16% 24% % % % 18% % % % % 36% 4% % Arrivals % % 14% 8% 2% 17% % % % % 25% 13% 19% 1% % % Departures Arrivals 7% 7% 6% 6% 5% 5% 4% 4% 3% 3% 2% 2% 1% 1% % % Percentage Departure Utilization Percentage Arrival Utilization 2 14 13 4 16 8 26 36 24 2 1 17 19 18 Runway 1C-28C was commissioned on October 17, 213. Chicago Department of Aviation Page 6 October 214

Runway Use Report Chicago Midway International Airport Period: May 17, 214 to May 31, 214 Time of Day: All Hours Runway Utilization (All Hours) Source: Airport Noise Management System (ANMS) Runway Utilization (All Hours) Runway 4L & 4R 13C 22L & 22R 31C Flight Direction NE SE SW NW Average Daily Operations Departures 14 1 113 66 Arrivals 159 5 11 51 Percentage Utilization Departures 42% 3% 34% 2% Arrivals 49% 1% 34% 16% Departures (All Hours) 9% 8% 7% 6% 5% 4% 3% 2% 1% % 4L & 4R 13C 22L & 22R 31C Arrivals (All Hours) 9% 8% 7% 6% 5% 4% 3% 2% 1% % 4L & 4R 13C 22L & 22R 31C Percentage Departure Utilization Percentage Arrival Utilization 2 42 1 34 35 3 49 16 Chicago Department of Aviation Page 7 October 214

Noise and Aircraft Events Report Chicago O'Hare and Midway International Airports Period: May 17, 214 to May 31, 214 Site: 217-1149 Candlewood Drive Day Measured DNL Aircraft Community Total Aircraft Noise Events Daily Loud Events Events >85 Lmax May 17 37.6 57.7 57.8 14 May 18 47.3 58.3 58.7 21 May 19 43.5 57.9 58.1 53 May 2 45.2 57.6 57.9 52 May 21 41.1 56.5 56.7 4 May 22 4.5 53.3 53.5 37 May 23 4.8 56.2 56.4 38 May 24 41.4 59.9 6. 44 May 25 4. 53.3 53.5 22 May 26 42.7 53.4 53.7 35 May 27 37.3 56.4 56.5 3 May 28 41.7 58.1 58.2 26 May 29 42.8 53.2 53.6 6 May 3 45.5 54. 54.5 62 May 31 41.5 55.2 55.4 37 Average DNL Average Average Aircraft Community Total All Events >85 Lmax 42.7 56.6 56.8 38 Chicago Department of Aviation Page 8 October 214

Hourly Noise Level Report Chicago O'Hare and Midway International Airports Period: May 17, 214 to May 31, 214 Site: 217-1149 Candlewood Drive Metric: Aircraft Leq Date Hour Of The Day 1 2 3 4 5 6 7 8 9 1 11 12 13 14 15 16 17 18 19 2 21 22 23 DNL May 17 39 41 38 39 35 41 49 4 38 May 18 32 5 49 41 3 37 42 43 36 43 36 5 47 May 19 42 46 5 48 42 35 45 44 43 41 46 45 51 41 44 May 2 41 48 42 5 39 46 5 48 42 32 43 41 45 May 21 38 42 4 32 38 5 47 48 48 31 3 39 35 41 May 22 3 46 51 46 33 36 41 41 35 41 4 4 May 23 43 45 36 39 51 39 42 42 42 45 37 35 38 41 May 24 31 42 43 43 46 49 48 43 47 39 38 41 May 25 33 47 35 51 42 35 42 34 4 May 26 38 5 39 47 36 34 45 42 37 42 43 43 May 27 43 41 43 36 39 37 4 41 43 4 35 39 37 May 28 34 38 34 41 42 42 49 37 39 34 37 4 49 41 39 42 May 29 43 45 43 48 43 43 44 44 47 41 4 36 41 42 4 4 43 May 3 37 45 38 47 44 46 42 47 43 41 29 47 4 41 51 3 38 37 45 May 31 37 41 33 42 42 44 35 43 45 42 43 38 41 42 Energy Average 26 25 22 31 23 33 4 45 45 42 45 44 44 44 41 42 42 39 4 44 37 4 34 43 Note: ## is aircraft events above 65 db daytime (7 a.m. - 1 p.m.) or 55 db nighttime (1 p.m. - 7 a.m.) Chicago Department of Aviation Page 9 October 214

Hourly Noise Level Report Chicago O'Hare and Midway International Airports Period: May 17, 214 to May 31, 214 Site: 217-1149 Candlewood Drive Metric: Aircraft Noise Events Date Hour Of The Day 1 2 3 4 5 6 7 8 9 1 11 12 13 14 15 16 17 18 19 2 21 22 23 Count May 17 1 2 3 2 2 1 1 2 14 May 18 1 2 2 2 1 1 1 5 2 2 1 1 21 May 19 5 7 9 6 2 3 3 2 3 1 7 2 2 1 53 May 2 2 7 4 4 5 4 4 8 6 1 3 3 52 May 21 1 4 4 2 3 6 1 3 3 1 1 2 1 4 May 22 1 7 12 5 1 2 2 2 1 3 1 37 May 23 4 4 1 3 1 3 2 2 3 2 1 2 1 38 May 24 2 3 3 4 7 6 3 4 7 2 3 44 May 25 1 4 2 5 4 1 4 1 22 May 26 2 5 4 4 2 1 9 3 1 2 2 35 May 27 3 2 5 2 1 2 3 1 7 2 1 1 3 May 28 1 2 2 2 3 2 3 1 1 1 2 1 2 2 1 26 May 29 4 5 4 3 3 6 3 5 7 4 4 4 3 1 2 2 6 May 3 1 1 2 9 4 4 2 8 6 2 1 7 3 4 5 1 1 1 62 May 31 1 1 2 3 6 4 1 4 4 4 4 2 1 37 Average 2 4 4 2 3 4 2 4 2 3 2 2 1 1 1 1 38 Aircraft Noise Events are described on page 2 of this report. Chicago Department of Aviation Page 1 October 214

Noise Level Graph Report (DNL) Chicago O'Hare and Midway International Airports Period: May 17, 214 to May 31, 214 Site: 217-1149 Candlewood Drive Aircraft, Community and Total DNL Aircraft Community Total 85 8 75 Decibels (dba) 7 65 6 55 5 45 4 35 17 18 19 2 21 22 23 24 25 26 27 28 29 3 31 Day Of The Month Chicago Department of Aviation Page 11 October 214

Aircraft Noise Events Graph Report (Lmax) Chicago O'Hare and Midway International Airports Period: May 17, 214 to May 31, 214 Site: 217-1149 Candlewood Drive 6 Total Number of Measured Aircraft Noise Events 5 Number of Events 4 3 2 1 2 31 42 53 64 75 86 97 18 dba Max Noise Levels Chicago Department of Aviation Page 12 October 214

Loudest Aircraft Noise Events Report Chicago O'Hare and Midway International Airports Period: May 17, 214 to May 31, 214 Site: 217-1149 Candlewood Drive Aircraft Airline Event Time Aircraft Stage Ops 1 Rwy Lmax Graph Of Lmax MD88 DAL May 25, 14:16 MD88 3 D 28R 8.3 MD83 AAL May 2, 13:3 MD83 3 D 28R 76.6 MD83 AAL May 19, 2:52 MD83 3 D 1L 76.3 MD82 AAL May 19, 9:22 MD82 3 D 28R 75.2 MD88 DAL May 23, 12:3 MD88 3 D 28R 75.1 MD82 AAL May 21, 13:23 MD82 3 D 28R 75. MD82 AAL May 3, 2:14 MD82 3 D 28R 75. MD83 AAL May 18, 8:47 MD83 3 D 28R 74.8 MD83 AAL May 18, 22:44 MD83 3 D 28R 74.5 MD83 AAL May 2, 16:43 MD83 3 D 28R 74.3 MD83 AAL May 18, 9:26 MD83 3 D 28R 74.2 MD82 AAL May 26, 9:22 MD82 3 D 28R 74.1 MD83 AAL May 21, 14:36 MD83 3 D 28R 73.5 MD83 AAL May 24, 11: MD83 3 D 28R 73.4 MD83 AAL May 21, 11:4 MD83 3 D 28R 73.2 MD82 AAL May 29, 1:7 MD82 3 D 22L 72.9 MD83 AAL May 24, 12:42 MD83 3 D 22L 72.8 MD83 AAL May 17, 19:52 MD83 3 D 28R 72.7 MD83 AAL May 29, 15:17 MD83 3 D 1L 72.3 MD82 AAL May 28, 13:38 MD82 3 D 1L 71.8 MD83 AAL May 28, 2:46 MD83 3 D 1L 71.7 MD88 DAL May 2, 11:41 MD88 3 D 28R 71.5 MD83 AAL May 2, 17:4 MD83 3 D 22L 71.2 RCH May 24, 14:13 MD83 3 D 28R 69.4 MD83 AAL May 22, 21:19 B738 3 D 28R 69.1 1 "D" represents departures, "A" represents arrivals. Chicago Department of Aviation Page 14 October 214

Gate Location Report Chicago O'Hare and Midway International Airports Period: May 18, 214 Operations: Arrivals and Departures Gate: Site 217-1146 Candlewood Drive Summary Arrivals: 1 Operations Left of Center: 26 (54%) Source: Airport Noise Management System (ANMS) Chicago Department of Aviation Departures: 38 : Left Boundary of Gate Page 15 Total Operations: 48 Operations Right of Center: 22 (46%) : Center of Gate : Right Boundary of Gate October 214

Aircraft Altitude Report Chicago O'Hare and Midway International Airports Period: May 18, 214 Operations: Arrivals and Departures Gate: Site 217-1146 Candlewood Drive Arrivals: 1 Operations Left of Center: 26 (54%) Summary Departures: 38 Total Operations: 48 Operations Right of Center: 22 (46%) 12, 11,5 11, 1,5 1, 9,5 Above Airport Elevation (feet) 9, 8,5 8, 7,5 7, 6,5 6, 5,5 5, 4,5 4, 3,5 3, 2,5 2, 1,5 1, 5-1. -.8 -.6 -.4 -.2..2.4.6.8 1. Deviation From Center of Gate (miles) Note: Airport elevation is based on published aeronautical charts Source: Airport Noise Management System (ANMS) Chicago Department of Aviation Page 16 October 214

O Hare Noise Hotline: 1-8-453-9569 Midway Noise Hotline: 1-8-914-8537 www.flychicago.com