Portable Noise Monitor Report

Portable Noise Monitor Report Chicago O Hare International Airport Site 2117 5843 N. Christiana Avenue, Chicago July 14, 217 through August 2, 217 USH5-ILH15-ILS8-CHI39 Visit the O Hare Noise webpage on the Internet at www.flychicago.com/ordnoise

Portable Noise Monitor Report City of Chicago Department of Aviation Portable Noise Monitor Report Chicago O Hare International Airport Site 2117 deployed at 5843 N. Christiana Avenue, Chicago July 14, 217 through August 2, 217 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 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 44 noise monitors around O Hare and Midway, 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 and Midway Noise Compatibility Commission utilize data from the ANMS to facilitate the development and management of noise abatement programs at the Airport. 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 airport. 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 5843 N. Christiana Avenue, Chicago between July 14 and August 2, 217. The monitor was located approximately 1 miles east from the center of the airport, as shown on Chicago Department of Aviation Page 1 Printed September 217

Portable Noise Monitor Report the vicinity map on page 4. The operations that primarily affected this location during the monitoring period were Arrivals on Runways 27L and 27R as shown on the map on page 13. 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. 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 summarize 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 and community 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. Community noise is noise from all other sources such as highways, railroads as well as background noise. The relative noise level of each of these sources is also shown graphically in this report. The daily aircraft noise level varies from day to day. This is primarily because different runways are used under different wind conditions which affect 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. The measured noise levels in this report are not necessarily representative of the noise level on an annual basis, nor are they used to determine eligibility for the Residential Sound Insulation Program. Chicago Department of Aviation Page 2 Printed September 217

Portable Noise Monitor Report 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 1. 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 aircrafts that generated the highest noise events were usually arrivals and departures by A319 and A32 s (Airbus A319 and Airbus A32). Aircraft Operations within the Vicinity of the Noise Monitor The map on page 13 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 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 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 3 Printed September 217

Runway Use Report Period: July 14, 217 to August 2, 217 Time of Day: All Hours Runway Use (All Hours) Source: Airport Noise Management System (ANMS) Runway Utilization 4L 4R 9L 9R 1L 1C 1R 15 22L 22R 27L 27R 28L 28C 28R 33 Average Daily Operations Departures 8 379 337 3 1 193 1 345 15 Arrivals 3 256 4 16 328 15 4 3 4 226 154 163 14 n/a Percentage Utilization Departures 1% % % 3% 26% % % % 15% % % % % % 27% 1% Arrivals % % 2% % 1% 26% 8% % % 1% 18% 12% % 13% 1% % 4% Departures 4% Arrivals 3% 3% 2% 2% 1% 1% % % Percentage Departure Utilization Percentage Arrival Utilization #R 1 # 1 2 12 1 3 18 27 26 1 1 26 13 8 # # 15 Chicago Department of Aviation Page 5 Printed September 217

Noise and Aircraft Events Report Period: July 14, 217 to August 2, 217 Site: 2117-5843 N. Christiana Avenue Day Aircraft Measured DNL Community Aircraft Noise Events Daily Loud Events Events >85 Lmax Jul 14 57.3 58.8 468 Jul 15 57.3 58.4 43 Jul 16 53.5 59.9 144 Jul 17 52. 57.8 142 Jul 18 58.3 59.1 425 Jul 19 56.8 61.1 258 Jul 2 56. 62.3 252 Jul 21 57.1 59.9 25 Jul 22 57.4 63.4 329 Jul 23 58.2 59. 447 Jul 24 54.4 6.1 143 Jul 25 54.1 59.6 14 Jul 26 6.8 58.7 51 Jul 27 55.7 6.6 197 Jul 28 56.4 61.1 144 Jul 29 54.3 6.5 149 Jul 3 54. 6.4 178 Jul 31 59. 57.7 376 Aug 1 57.2 56.1 341 Aug 2 56.7 56.6 346 Average DNL Average Average Aircraft Community All Events >85 Lmax 56.8 59.9 283 The measured noise levels in this report are not necessarily representative of the noise level on an annual basis, nor are they used to determine eligibility for the Residential Sound Insulation Program. Only aircraft noise is considered when creating the FAA approved noise contour. Chicago Department of Aviation Page 6 Printed September 217

Hourly Noise Level Report Period: July 14, 217 to August 2, 217 Site: 2117-5843 N. Christiana Avenue 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 Jul 14 6 28 34 31 25 3 33 32 29 37 34 28 28 35 31 25 1 1 468 Jul 15 1 6 15 32 21 25 35 3 29 3 27 22 35 29 31 34 16 12 43 Jul 16 1 9 7 9 1 13 8 8 7 8 8 1 11 7 9 3 9 7 144 Jul 17 1 1 1 11 8 12 5 1 1 5 1 4 8 4 7 9 9 8 13 6 142 Jul 18 1 5 19 34 38 22 28 31 19 21 29 27 27 21 34 2 23 2 6 425 Jul 19 14 25 32 27 18 16 16 9 1 6 17 8 13 11 12 1 12 2 258 Jul 2 1 7 5 1 15 27 29 32 22 27 13 1 1 16 1 14 9 4 252 Jul 21 1 1 1 7 26 33 13 14 11 13 15 6 15 18 21 14 15 9 7 1 25 Jul 22 1 1 4 8 1 12 9 24 33 28 22 29 27 26 31 23 15 2 13 9 2 329 Jul 23 1 23 25 1 19 29 33 35 27 31 26 9 3 18 28 45 38 23 15 447 Jul 24 4 1 1 9 13 3 5 6 6 8 7 4 12 1 7 12 11 6 1 6 2 143 Jul 25 1 1 1 11 11 11 7 8 4 5 7 14 11 1 7 11 8 5 7 14 Jul 26 1 9 21 23 34 26 23 25 31 27 2 22 28 29 29 28 25 41 33 17 18 51 Jul 27 6 1 1 1 3 14 15 13 8 13 4 5 12 14 15 14 9 9 13 9 5 3 1 197 Jul 28 1 1 11 7 4 12 6 4 13 8 11 7 11 6 9 1 5 11 5 2 144 Jul 29 2 1 7 8 9 12 3 2 8 6 9 9 7 11 11 15 6 16 6 1 149 Jul 3 1 1 2 2 7 12 9 12 1 11 16 7 1 1 16 8 8 12 4 12 7 1 178 Jul 31 1 1 1 17 22 35 3 18 34 23 28 26 28 27 21 11 18 1 2 15 7 1 376 Aug 1 1 13 22 35 29 3 32 18 27 24 31 24 9 5 23 34 8 3 341 Aug 2 14 9 32 31 22 33 33 29 22 29 27 27 1 3 15 7 2 1 346 Average 1 1 6 15 2 18 13 19 19 19 17 19 19 16 13 16 17 13 13 7 3 283 Aircraft Noise Events are described on page 2 of this report. Chicago Department of Aviation Page 7 Printed September 217

Hourly Noise Level Report Period: July 14, 217 to August 2, 217 Site: 2117-5843 N. Christiana Avenue 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 Jul 14 48 56 59 58 56 6 57 57 57 58 56 57 55 58 6 55 34 35 57 Jul 15 4 48 53 6 55 57 63 61 57 57 57 58 59 6 59 56 55 52 57 Jul 16 48 51 49 51 53 51 49 5 49 55 5 55 55 48 51 5 55 51 53 Jul 17 45 42 38 5 49 56 47 49 5 49 5 48 51 47 5 52 52 52 51 48 52 Jul 18 45 51 57 57 58 56 58 57 58 57 57 56 58 62 57 57 55 56 5 58 Jul 19 53 57 58 57 58 61 52 5 54 48 56 52 53 55 51 52 52 42 57 Jul 2 48 51 5 39 56 6 59 56 55 57 57 5 53 57 54 53 54 44 56 Jul 21 44 48 36 5 57 58 52 51 5 54 54 54 53 55 58 51 52 54 49 51 57 Jul 22 52 51 45 5 34 53 51 57 59 57 56 58 56 59 59 57 55 48 54 54 46 57 Jul 23 5 55 55 5 57 57 57 58 57 57 55 54 44 56 57 58 58 56 53 58 Jul 24 52 48 44 52 53 48 49 48 5 51 51 45 5 52 49 53 54 46 5 5 39 54 Jul 25 38 52 36 54 51 5 52 51 49 49 53 53 52 54 53 52 5 47 53 54 Jul 26 43 52 55 57 6 59 55 57 62 6 59 57 57 57 59 59 58 61 57 56 55 61 Jul 27 49 38 4 52 47 53 52 54 48 52 49 47 55 56 56 56 55 56 56 55 48 43 39 56 Jul 28 44 49 55 46 48 52 5 48 55 51 54 52 56 58 59 56 5 51 49 53 56 Jul 29 49 4 5 5 53 53 45 42 51 47 52 53 55 53 53 54 53 54 53 41 54 Jul 3 44 45 42 45 49 5 49 51 53 52 55 55 51 51 57 51 51 58 47 51 49 45 54 Jul 31 35 33 34 54 56 6 57 55 6 59 61 59 6 6 59 6 58 58 5 53 52 47 59 Aug 1 52 52 55 57 58 47 6 56 57 57 56 55 51 48 58 58 55 49 57 Aug 2 53 51 57 59 57 59 58 57 56 57 58 62 55 46 55 51 45 39 57 Energy Average 45 37 41 4 44 49 54 56 55 54 57 57 57 55 56 55 57 56 56 56 54 53 51 47 57 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 8 Printed September 217

Noise Level Graph Report (DNL) Period: July 14, 217 to August 2, 217 Site: 2117-5843 N. Christiana Avenue Aircraft and Community DNL Aircraft Community 75 7 65 Decibels (dba) 6 55 5 45 4 35 3 14 15 16 17 18 19 2 21 22 23 24 25 26 27 28 29 3 31 1 2 Day Of The Month Chicago Department of Aviation Page 9 Printed September 217

Aircraft Noise Events Graph Report (Lmax) Period: July 14, 217 to August 2, 217 Site: 2117-5843 N. Christiana Avenue 7 Total Number of Measured Aircraft Noise Events 6 Number of Events 5 4 3 2 1 2 31 42 53 64 75 86 97 18 dba Max Noise Levels Chicago Department of Aviation Page 1 Printed September 217

Loudest Aircraft Noise Events Report Period: July 14, 217 to August 2, 217 Site: 2117-5843 N. Christiana Avenue Aircraft Airline Event Time Aircraft Stage Ops 1 Rwy Lmax Graph Of Lmax Jul 26, 11:2 A32 3 A 27L 84.4 Jul 19, 1:16 E145 3 A 27L 83.8 Jul 26, 2:3 CRJ2 3 A 27L 82.2 Jul 15, 12:1 A319 3 A 27L 8.6 Jul 18, 17:11 E145 3 A 27L 8.6 Jul 28, 18:5 A319 3 D 9R 8.2 Jul 14, 15:9 E145 3 A 27L 8.2 Jul 28, 17:19 A319 3 D 9R 79.9 Jul 15, 11:59 A32 3 A 27L 79.2 Jul 14, 19:4 CRJ2 3 A 27L 78.9 Jul 15, 18:1 CRJ7 3 A 27L 78.6 Jul 2, 1:4 E145 3 A 27L 78.3 Jul 27, 19:15 MD83 3 D 9R 78.3 Jul 27, 16:3 B748 3 D 1L 78.1 Aug 1, 1:33 B738 3 A 27R 78. Jul 28, 23:9 B748 3 D 1L 77.7 Jul 27, 17:58 B744 3 D 1L 77.6 Jul 14, 19:2 CRJ2 3 A 27L 77.6 Jul 25, 4:7 B744 3 D 1C 77.5 Jul 25, 6:58 A32 3 D 9R 77.4 Jul 31, 19:34 E145 3 D 9R 77.4 Jul 18, 6:23 A32 3 A 27L 77.4 Jul 22, 1:26 MD82 3 A 27L 77.4 Jul 15, 9:13 B738 3 A 27L 77.3 Jul 16, 4:29 B739 3 A 28R 77.3 75 85 95 1 "D" represents departures, "A" represents arrivals. Chicago Department of Aviation Page 12 Printed September 217

Gate Location Report Period: July 26, 217 Operations: Arrivals and Departures Site: 2117-5843 N. Christiana Avenue Summary Arrivals: 666 Operations Left of Center: 62 (93%) Source: Airport Noise Management System (ANMS) Chicago Department of Aviation Departures: 1 : Left Boundary of Gate Page 13 Total Operations: 667 Operations Right of Center: 47 (7%) : Center of Gate : Right Boundary of Gate Printed September 217

Aircraft Altitude Report Period: July 26, 217 Operations: Arrivals and Departures Site: 2117-5843 N. Christiana Avenue Arrivals: 666 Operations Left of Center: 62 (93%) Summary Departures: 1 Total Operations: 667 Operations Right of Center: 47 (7%) 6, 5, Above Airport Elevation (feet) 4, 3, 2, 1, -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 14 Printed September 217

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