Portable Noise Monitor Report

Portable Noise Monitor Report Chicago O Hare International Airport Site 2198 5N67 Rochefort Lane, Wayne May 9, 218 through June 3, 218 USH6-ILH49-ILS25 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 2198 deployed at 5N67 Rochefort Lane, Wayne May 9, 218 through June 3, 218 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 5N67 Rochefort Lane, Wayne between May 9 and June 3, 218. The monitor was located approximately 17.8 miles west from the center of the airport, as shown on the vicinity map Chicago Department of Aviation Page 1 Printed August 218

Portable Noise Monitor Report on page 4. The operations that primarily affected this location during the monitoring period were Arrivals on Runways 1L, 1C and 1R as shown on the map on page 13. Runway Use Reports 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. 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. The average number of measured aircraft events per day is also summarized in the table for each site. This includes a summary of all Chicago Department of Aviation Page 2 Printed August 218

Portable Noise Monitor Report 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 Lmax. The Lmax is the maximum or peak level that the noise reached during the aircraft overflight. When comparing Aircraft Noise Levels to other everyday sounds the Lmax 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 B738 s (Boeing 737-8). 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 August 218

Runway Use Report Period: May 9, 218 to June 3, 218 Time of Day: All Hours Runway Use (All Hours) Source: Airport Noise Management System (ANMS) Runway Utilization 4L 4R 9L 9R 1L 1C 1R 22L 22R 27L 27R 28L 28C 28R Average Daily Operations Departures 4 422 392 3 16 3 242 Arrivals 1 279 12 22 363 14 1 173 17 125 3 Percentage Utilization Departures 1% % % 34% 32% % % 13% % % % % % 2% Arrivals % % 23% 1% 2% 3% 11% % % 14% 9% % 1% % 5% Departures 5% Arrivals 4% 4% 3% 3% 2% 2% 1% 1% % % Percentage Departure Utilization Percentage Arrival Utilization #RE 1 # 23 9 #R #R 34 1 14 2 32 2 3 1 11 # # # 13 #R Chicago Department of Aviation Page 5 Printed August 218

Noise and Aircraft Events Report Period: May 9, 218 to June 3, 218 Site: 2198-5N67 Rochefort Lane Day Aircraft Measured DNL Community Aircraft Noise Events Daily Loud Events Events >85 Lmax May 9 51.9 64.5 7 May 1 49.9 56. 124 May 11 56.7 61.8 282 May 12 52.9 59.4 197 May 13 52.8 57.1 196 May 14 51.2 59.5 12 May 15 52.9 57.3 221 May 16 54. 56.3 212 May 17 59. 59.8 229 May 18 53.3 58.3 29 May 19 48.3 56.4 45 May 2 52.6 58.7 241 May 21 51.9 57.6 175 May 22 55.1 55. 88 May 23 5.4 62.2 91 May 24 56.6 57.9 23 May 25 46.7 64.9 12 May 26 37.7 53.1 11 May 27 44.5 53.7 55 May 28 5.5 56.1 135 May 29 48.9 56.5 113 May 3 49.4 57.9 9 May 31 43.7 62.4 13 Jun 1 52.1 56.7 26 Jun 2 52.6 61.4 184 Jun 3 48. 56.4 15 Average DNL Average Average Aircraft Community All Events >85 Lmax 52.6 59.5 137 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 August 218

Hourly Noise Level Report Period: May 9, 218 to June 3, 218 Site: 2198-5N67 Rochefort Lane 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 9 2 2 9 1 14 13 13 3 1 3 3 3 1 1 1 7 May 1 1 2 4 17 2 18 21 16 13 3 3 6 124 May 11 4 1 1 7 6 16 17 22 11 2 9 17 17 21 18 13 13 23 21 11 4 4 6 282 May 12 4 1 1 2 4 4 5 6 6 11 11 16 8 18 12 2 18 11 19 9 3 3 5 197 May 13 1 1 3 5 3 4 7 2 7 11 14 16 1 16 13 16 21 18 1 7 5 6 196 May 14 1 2 1 2 4 6 4 5 1 5 19 23 8 2 1 4 13 1 2 7 12 May 15 14 1 5 1 1 11 8 15 11 17 15 13 11 18 12 16 17 9 5 1 2 221 May 16 5 1 2 7 8 9 12 6 14 17 1 13 12 6 12 19 14 12 1 1 1 12 212 May 17 5 2 4 9 11 12 16 9 13 13 16 18 3 12 12 13 2 13 13 4 6 5 229 May 18 5 2 2 5 12 8 12 1 8 12 1 18 14 17 13 2 11 2 4 2 1 1 2 29 May 19 1 1 3 4 11 1 3 12 45 May 2 1 1 2 3 9 11 16 8 4 21 15 17 17 17 13 17 17 15 12 16 3 6 241 May 21 3 3 2 3 1 7 15 16 5 1 21 25 3 4 2 2 15 9 4 7 12 5 1 175 May 22 4 1 5 3 7 12 18 12 14 5 4 3 88 May 23 1 1 1 2 4 2 3 5 15 4 4 21 1 7 8 3 91 May 24 4 1 1 5 14 9 1 21 1 18 2 21 14 13 4 12 6 13 14 11 1 1 7 23 May 25 4 2 1 1 1 1 1 1 12 May 26 1 1 1 1 1 1 2 2 1 11 May 27 1 1 1 1 1 1 6 1 1 8 2 2 2 55 May 28 1 16 13 16 12 4 6 5 8 14 21 11 2 2 4 135 May 29 1 3 8 4 3 1 11 1 8 9 13 7 1 6 9 8 5 4 1 1 113 May 3 3 1 8 3 8 3 1 9 1 3 11 15 5 1 9 May 31 1 2 2 3 2 2 1 13 Jun 1 1 2 8 15 8 1 1 16 16 15 9 19 13 2 21 14 1 2 6 26 Jun 2 1 4 2 6 6 9 6 3 8 14 17 13 15 11 1 17 19 8 3 2 3 7 184 Jun 3 1 2 1 1 2 5 2 1 15 Average 2 1 1 2 3 4 5 7 4 8 8 1 9 8 7 9 9 12 1 7 3 2 4 137 Aircraft Noise Events are described on page 2 of this report. Chicago Department of Aviation Page 7 Printed August 218

Hourly Noise Level Report Period: May 9, 218 to June 3, 218 Site: 2198-5N67 Rochefort Lane 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 9 4 4 49 38 53 53 54 55 44 55 52 58 35 43 46 52 May 1 45 42 44 53 54 57 54 52 5 46 42 48 5 May 11 47 41 43 5 48 55 53 54 52 59 53 54 53 54 53 53 52 56 55 51 46 48 51 57 May 12 44 39 39 41 46 46 44 45 46 49 57 56 52 52 51 54 53 51 53 5 44 44 49 53 May 13 4 37 46 49 42 45 45 45 47 51 51 52 5 52 52 53 52 51 5 5 49 48 53 May 14 43 38 44 44 46 45 5 46 38 48 55 54 52 4 37 42 5 48 42 47 51 May 15 5 51 45 39 5 48 48 53 5 54 51 51 51 53 52 52 53 48 48 36 42 53 May 16 47 34 42 5 47 52 52 48 51 51 5 52 56 46 5 52 54 51 47 34 47 51 54 May 17 45 46 48 49 49 52 51 49 5 52 53 69 49 67 51 51 53 51 5 45 47 47 59 May 18 45 41 46 47 5 47 51 51 5 51 49 54 52 57 53 55 5 53 45 42 38 38 39 53 May 19 37 36 47 45 5 49 41 51 48 May 2 38 43 42 41 47 49 53 49 44 53 52 52 52 51 5 55 54 52 52 53 42 49 53 May 21 41 43 47 43 36 49 51 53 47 54 53 55 45 43 37 39 51 48 45 45 49 46 35 52 May 22 41 36 45 43 68 58 53 52 5 48 45 43 55 May 23 43 34 41 43 48 43 51 6 52 51 54 55 49 47 49 45 5 May 24 43 39 47 48 58 47 49 54 52 55 54 54 53 52 44 5 48 52 51 49 45 37 46 57 May 25 46 38 42 4 38 58 36 37 47 May 26 36 4 38 41 38 39 44 42 42 38 May 27 37 41 48 34 35 48 47 48 5 48 39 41 41 45 May 28 39 57 53 53 51 46 45 44 47 5 6 49 39 43 43 51 May 29 38 42 48 41 42 43 52 34 49 5 49 47 47 46 46 49 47 45 41 35 49 May 3 43 42 48 44 45 41 47 48 5 44 51 51 47 43 49 May 31 39 44 46 53 55 44 39 44 Jun 1 41 39 48 51 49 49 49 52 52 51 5 52 57 55 54 51 36 46 5 52 Jun 2 36 43 41 45 47 49 46 43 49 56 53 54 56 51 48 53 53 48 43 4 41 5 53 Jun 3 37 49 45 4 51 5 42 41 48 Energy Average 43 41 39 37 43 47 45 47 49 47 51 51 51 56 52 55 55 52 51 51 48 45 43 47 53 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 August 218

Noise Level Graph Report (DNL) Period: May 9, 218 to June 3, 218 Site: 2198-5N67 Rochefort Lane Aircraft and Community DNL Aircraft Community 75 7 65 Decibels (dba) 6 55 5 45 4 35 3 9 1 11 12 13 14 15 16 17 18 19 2 21 22 23 24 25 26 27 28 29 3 31 1 2 3 Day Of The Month Chicago Department of Aviation Page 9 Printed August 218

Aircraft Noise Events Graph Report (Lmax) Period: May 9, 218 to June 3, 218 Site: 2198-5N67 Rochefort Lane 6 Total Number of Measured Aircraft Noise Events 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 dba Max Max Noise Levels Chicago Department of Aviation Page 1 Printed August 218

Loudest Aircraft Noise Events Report Period: May 9, 218 to June 3, 218 Site: 2198-5N67 Rochefort Lane Aircraft Airline Event Time Aircraft Stage Ops 1 Rwy Lmax Graph Of Lmax May 17, 13:3 B738 3 A 1C 84.1 May 22, 16:31 B738 3 A 1C 83.8 May 22, 16:29 CRJ7 3 A 1R 83.4 May 23, 18:2 A319 3 A 1C 82.9 May 24, 1:48 B738 3 A 1C 8.9 May 9, 15:23 E145 3 D 28R 8.4 May 17, 15:33 A321 3 A 1C 79.7 May 17, 15:34 B738 3 A 1C 79.2 May 23, 17:16 B77W 3 A 1C 78.2 May 17, 15:16 B737 3 A 1C 77.8 May 9, 1:31 B738 3 A 1R 77.1 May 11, 6:25 CRJ7 3 A 1R 76.8 May 17, 15:38 CRJ2 3 A 1R 76.8 May 11, 19:42 CRJ2 3 A 1R 76.7 May 28, 1:1 CRJ2 3 A 1R 76.7 May 1, 17:13 B748 3 A 1C 76.1 May 24, 11:7 E45X 3 A 1R 75.8 May 22, 17:9 CRJ2 3 A 1R 75.6 May 22, 17:1 CRJ7 3 A 1R 75.5 May 11, 9:59 B739 3 A 1R 75.4 May 11, 16:43 MD9 3 A 1C 75.4 May 29, 1:24 B788 3 A 1C 75.1 May 9, 1:25 CRJ9 3 A 1R 74.9 May 1, 15:39 MD83 3 A 1C 74.9 May 11, 18:8 B788 3 A 1C 74.5 75 85 95 1 "D" represents departures, "A" represents arrivals. Chicago Department of Aviation Page 12 Printed August 218

Gate Location Report Period: May 17, 218 Operations: Arrivals and Departures Gate: Site 2198-5N67 Rochefort Lane Summary Arrivals: 799 Operations Left of Center: 536 (67%) Source: Airport Noise Management System (ANMS) Chicago Department of Aviation Departures: 1 : Left Boundary of Gate Page 13 Total Operations: 8 Operations Right of Center: 264 (33%) : Center of Gate : Right Boundary of Gate Printed August 218

Aircraft Altitude Report Period: May 17, 218 Operations: Arrivals and Departures Gate: Site 2198-5N67 Rochefort Lane Arrivals: 799 Operations Left of Center: 536 (67%) Summary Departures: 1 Total Operations: 8 Operations Right of Center: 264 (33%) 11, 1, 9, Above Airport Elevation (feet) 8, 7, 6, 5, 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 August 218

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