Portable Noise Monitor Report

Chicago Midway International Airport

Visit the Midway Noise Management Webpage on the Internet at www.flychicago.com

Site 2182 4750 S. Komensky Avenue, Chicago June 20, 2017 through July 17, 2017

USH04-ILH01-ILS01-CHI14

Portable Noise Monitor Report

City of Chicago Department of Aviation Portable Noise Monitor Report

Chicago Midway International Airport

Site 2182 deployed at 4750 S. Komensky Avenue, Chicago

June 20, 2017 to July 17, 2017

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 Midway 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 150,000 flights and 400,000 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 Commissions 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 4750 S. Komensky Avenue, Chicago between June 20 and July 17, 2017. The monitor was located approximately 2 miles northeast from the center of the airport, as shown

Chicago Department of Aviation Page 1 Printed August 2017

Portable Noise Monitor Report

on the vicinity map on page 4. The operations that primarily affected this location during the monitoring period were Arrivals on Runways 22L and 22R as shown on the map on page 13. Runway Use Reports 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 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, community and total noise in Day-Night Average Sound Levels (DNL’s). DNL is a 24-hour time-averaged sound exposure level with a 10 decibel (dB) nighttime (10 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 Midway. Community noise is noise from all other sources such as highways, railroads as well as background noise. Total noise is both sources combined logarithmically. 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 August 2017

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 10. 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 75,000 lbs. were phased out of operation after December 31, 1999. The data shows that the aircraft that generated the highest noise events were arrivals by B737 and B738’s (Boeing 737-700 and Boeing 737-800). 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 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 3 Printed August 2017

Runway Use ReportChicago Midway International AirportPeriod: June 20, 2017 to July 17, 2017Time of Day: All Hours

Percentage Departure Utilization Percentage Arrival Utilization

0%

10%

20%

30%

40%

50%

04L & 04R 13C 22L & 22R 31C

Arrivals (All Hours)Departures (All Hours)

0%

10%

20%

30%

40%

50%

04L & 04R 13C 22L & 22R 31C

3035

33

2

1 32

34

33

Runway Utilization (All Hours) Source: Airport Noise Management System (ANMS)

Runway 04L & 04R 13C 22L & 22R 31CFlight Direction NE SE SW NWAverage Daily Operations

Departures 106 5 118 127Arrivals 117 2 117 121

Percentage UtilizationDepartures 30% 2% 33% 35%Arrivals 33% 1% 32% 34%

Runway Utilization (All Hours)

Chicago Department of Aviation Page 5 Printed August 2017

Noise and Aircraft Events ReportChicago Midway International AirportPeriod: June 20, 2017 to July 17, 2017Site: 2182 - 4750 S. Komensky Avenue

Measured DNLDaily Loud Events

Events >85 Lmax

Jun 20 67.1 60.4 67.8 261 62 Jun 21 66.9 61.6 68.0 348 16 Jun 22 71.6 60.4 71.8 409 216 Jun 23 64.4 62.9 66.7 48 11 Jun 24 54.2 63.5 63.9 30 0 Jun 25 64.8 59.7 66.0 47 9 Jun 26 64.5 58.8 65.5 62 9 Jun 27 69.1 58.3 69.4 201 54 Jun 28 71.9 63.2 72.4 420 241 Jun 29 71.0 59.4 71.3 388 203 Jun 30 70.3 60.2 70.7 348 113 Jul 1 49.4 59.0 59.4 25 0 Jul 2 68.0 60.4 68.7 244 100 Jul 3 66.5 64.9 68.7 282 6 Jul 4 -- -- -- -- --Jul 5 -- -- -- -- --Jul 6 60.3 57.6 62.1 112 13 Jul 7 63.4 56.5 64.2 220 1 Jul 8 67.3 61.1 68.2 255 1 Jul 9 69.5 58.1 69.7 345 138 Jul 10 68.0 63.4 69.3 238 72 Jul 11 69.3 57.5 69.5 288 90 Jul 12 71.1 61.6 71.5 367 194 Jul 13 66.4 57.6 67.5 117 34 Jul 14 65.1 57.3 65.6 174 1 Jul 15 67.7 56.1 67.8 185 82 Jul 16 66.8 58.1 67.3 325 3 Jul 17 60.5 56.3 61.9 185 0

Average DNL Average AverageAircraft Community Total All Events >85 Lmax67.8 60.5 68.5 228 64

Note: Total DNL represents the logarithmic sum of Aircraft and Community noise.

--Excluded due to high community noise.

DayAircraft Noise Events

Aircraft Community Total

Chicago Department of Aviation Page 6 Printed August 2017

Hourly Noise Level ReportChicago Midway International AirportPeriod: June 20, 2017 to July 17, 2017Site: 2182 - 4750 S. Komensky AvenueMetric: Aircraft Noise Events

Hour Of The Day00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23

Jun 20 1 0 0 0 0 2 16 27 23 18 5 28 22 7 13 20 15 15 14 12 22 0 1 0 261 Jun 21 0 0 0 0 0 8 3 16 18 19 15 14 24 27 23 30 17 17 17 23 23 26 15 13 348 Jun 22 1 0 0 0 0 3 19 23 20 17 23 29 23 27 26 23 24 26 31 21 24 28 14 7 409 Jun 23 9 2 0 0 1 1 1 0 3 5 1 2 2 4 3 1 1 0 0 2 2 2 1 5 48 Jun 24 2 0 0 0 0 1 4 2 0 1 1 1 5 1 0 2 3 1 1 0 1 1 3 0 30 Jun 25 0 0 1 0 0 0 0 1 3 2 2 1 1 2 2 2 2 2 2 2 3 0 7 12 47 Jun 26 5 3 1 0 0 4 3 1 1 3 1 2 2 4 2 1 0 2 2 5 3 1 5 9 62 Jun 27 7 0 2 1 0 3 19 26 23 6 1 2 5 3 3 24 16 6 1 0 6 28 11 8 201 Jun 28 8 2 1 1 0 4 16 32 21 17 20 29 35 25 26 21 25 13 33 22 23 27 13 6 420 Jun 29 5 0 0 0 0 3 17 24 16 20 18 30 24 29 24 19 17 22 30 17 23 29 14 7 388 Jun 30 8 0 1 0 0 3 23 23 24 13 25 26 29 12 18 20 22 20 17 13 16 25 4 6 348 Jul 1 0 0 0 0 0 1 0 1 0 1 0 3 1 0 1 0 1 1 0 5 0 3 6 1 25 Jul 2 2 0 0 0 0 0 5 2 3 10 14 23 20 20 19 15 16 7 6 19 22 22 9 10 244 Jul 3 6 4 1 0 0 9 11 14 30 19 11 10 25 16 23 19 14 12 8 19 10 5 14 2 282 Jul 4 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --Jul 5 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --Jul 6 0 0 1 0 1 3 3 2 2 3 2 3 1 5 14 21 13 19 9 3 0 1 3 3 112 Jul 7 0 0 0 0 1 0 0 0 1 3 13 10 10 11 22 21 17 11 13 19 24 17 18 9 220 Jul 8 3 1 0 0 0 3 18 13 16 28 9 10 15 21 13 12 12 13 7 9 24 11 16 1 255 Jul 9 2 1 0 0 0 0 10 23 11 18 13 24 22 28 18 17 17 23 30 23 25 22 10 8 345 Jul 10 6 2 0 0 0 0 0 0 0 1 1 15 29 21 20 20 14 17 23 15 17 6 12 19 238 Jul 11 4 1 0 1 0 11 6 5 2 4 3 4 19 27 23 18 16 19 27 23 19 32 10 14 288 Jul 12 9 2 1 0 0 4 15 23 23 6 8 12 19 30 41 22 17 18 18 21 24 30 17 7 367 Jul 13 9 6 2 0 1 2 3 2 2 12 9 1 2 6 26 9 3 4 2 5 4 1 2 4 117 Jul 14 1 0 0 0 0 5 5 4 3 9 4 1 4 1 4 2 9 20 12 17 27 19 14 13 174 Jul 15 4 1 0 0 0 0 3 2 3 2 1 1 12 10 3 17 11 18 23 19 20 17 10 8 185 Jul 16 1 3 0 1 0 4 14 18 15 29 18 12 17 23 21 22 12 18 12 26 19 11 24 5 325 Jul 17 0 2 0 0 0 2 4 6 19 16 11 14 12 9 7 6 12 12 5 14 18 11 2 3 185

4 1 0 0 0 3 8 11 11 11 9 12 15 14 15 15 13 13 13 14 15 14 10 7 228

Aircraft Noise Events are described on page 2 of this report.

--Excluded due to high community noise.

Average

Date Count

Chicago Department of Aviation Page 7 Printed August 2017

Hourly Noise Level ReportChicago Midway International AirportPeriod: June 20, 2017 to July 17, 2017Site: 2182 - 4750 S. Komensky AvenueMetric: Aircraft Leq

Hour Of The Day00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23

Jun 20 45 0 0 0 0 56 68 70 68 67 61 70 69 60 59 62 62 61 63 62 65 0 51 0 67 Jun 21 0 0 0 0 0 53 53 60 66 65 64 63 68 67 66 66 64 66 63 69 69 69 64 65 67 Jun 22 55 0 0 0 0 59 70 69 69 68 67 71 70 70 68 69 69 69 72 69 70 71 68 66 72 Jun 23 67 60 0 0 58 34 56 0 48 51 38 47 46 47 47 38 46 0 0 44 46 43 41 48 64 Jun 24 44 0 0 0 0 43 51 43 0 36 40 36 54 40 0 41 45 42 45 0 39 39 56 0 54 Jun 25 0 0 41 0 0 0 0 40 46 41 43 41 41 45 50 48 47 47 46 48 52 0 64 67 65 Jun 26 63 60 56 0 0 48 46 46 43 46 36 42 39 45 24 42 0 46 56 53 47 40 61 64 65 Jun 27 63 0 46 41 0 60 68 69 67 59 40 42 48 47 44 65 63 62 42 0 62 70 66 64 69 Jun 28 66 59 58 44 0 60 68 70 69 67 69 70 72 70 71 68 70 66 73 70 71 72 68 65 72 Jun 29 58 0 0 0 0 62 69 70 68 66 67 70 70 70 69 67 67 68 71 68 68 71 67 65 71 Jun 30 67 0 56 0 0 63 70 70 68 65 68 70 69 63 65 66 66 67 66 65 68 70 59 47 70 Jul 1 0 0 0 0 0 47 0 41 0 40 0 48 39 0 39 0 38 36 0 47 0 43 51 40 49 Jul 2 43 0 0 0 0 0 50 42 45 65 66 68 68 69 68 67 66 64 62 68 70 71 65 66 68 Jul 3 63 62 54 0 0 61 60 64 68 64 63 61 67 64 63 62 63 62 60 64 61 60 60 51 66 Jul 4 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --Jul 5 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --Jul 6 0 0 48 0 50 57 44 43 43 48 42 44 46 62 66 65 62 67 64 43 0 37 44 43 60 Jul 7 0 0 0 0 40 0 0 0 42 44 62 60 60 59 65 64 63 61 62 64 68 65 63 59 63 Jul 8 57 50 0 0 0 57 66 61 63 68 63 63 63 65 63 61 63 64 61 65 69 64 66 56 67 Jul 9 59 56 0 0 0 0 65 70 66 68 66 67 68 69 67 67 67 70 70 69 69 70 66 65 69 Jul 10 65 60 0 0 0 0 0 0 0 40 39 68 70 68 68 67 65 69 69 63 61 56 66 64 68 Jul 11 61 53 0 37 0 64 62 48 43 46 51 60 68 67 67 66 67 67 70 69 68 71 66 66 69 Jul 12 66 59 50 0 0 59 66 69 68 60 61 68 68 72 73 69 67 68 69 69 70 72 68 65 71 Jul 13 67 65 57 0 47 44 45 45 47 64 63 41 57 60 69 63 47 45 39 52 54 34 44 46 66 Jul 14 46 0 0 0 0 52 50 47 43 53 52 45 47 41 50 43 58 65 63 65 67 66 65 63 65 Jul 15 59 53 0 0 0 0 47 47 46 44 36 41 67 65 43 66 66 68 69 69 69 69 66 65 68 Jul 16 49 61 0 57 0 58 64 63 63 68 64 64 62 66 63 62 62 63 61 67 64 60 64 55 67 Jul 17 0 57 0 0 0 47 49 52 65 64 60 64 59 60 54 53 54 59 52 61 65 65 42 44 61

EnergyAverage 61 56 49 43 44 58 64 65 65 64 63 65 66 66 66 65 64 65 66 66 67 67 64 62 68

Note: ## is aircraft events above 65 dB daytime (7 a.m. - 10 p.m.) or 55 dB nighttime (10 p.m. - 7 a.m.)--Excluded due to high community noise.

DNLDate

Chicago Department of Aviation Page 8 Printed August 2017

Noise Level Graph Report (DNL)

Chicago Midway International Airport

Period: June 20, 2017 to July 17, 2017

Site: 2182 - 4750 S. Komensky Avenue

02

03

04

05

06

07

08

09

10

11

12

--Excluded due to high community noise.

40

45

50

55

60

65

70

75

80

20 21 22 23 24 25 26 27 28 29 30 01 02 03 -- -- 06 07 08 09 10 11 12 13 14 15 16 17

Decib

els

(d

BA

)

Day Of The Month

Aircraft, Community and Total DNL Aircraft

Community

Total

Chicago Department of Aviation Page 9 Printed August 2017

Aircraft Noise Events Graph Report (Lmax)Chicago Midway International AirportPeriod: June 20, 2017 to July 17, 2017Site: 2182 - 4750 S. Komensky Avenue

Total Number of Measured Aircraft Noise Events

Nu

mb

er o

f Ev

ents

dBA Max Noise Levels

0

200

400

600

800

1000

1200

20 31 42 53 64 75 86 97 108

Chicago Department of Aviation Page 10 Printed August 2017

Loudest Aircraft Noise Events Report

Chicago Midway International Airport

Period: June 20, 2017 to July 17, 2017

Site: 2182 - 4750 S. Komensky Avenue

Aircraft Airline Event Time Aircraft Stage Ops1

Rwy Lmax Graph Of Lmax

Jul 02, 21:07 B738 3 A 22L 93.6

SR22 Jul 08, 22:00 B737 3 D 04R 92.1

B738 Jun 28, 14:45 B738 3 A 22L 91.3

Jun 28, 14:45 B738 3 A 22L 91.3

B737 Jun 28, 18:15 B737 3 A 22L 91.0

B737 Jun 28, 18:15 B737 3 A 22L 91.0

B737 Jul 15, 12:54 B737 3 A 22L 90.6

HELO Jun 28, 21:40 B738 3 A 22L 90.4

B737 Jun 28, 21:40 B738 3 A 22L 90.4

B737 Jun 28, 21:33 B738 3 A 22L 90.3

B350 Jun 28, 21:33 B738 3 A 22L 90.3

FA50 Jul 12, 13:27 B738 3 A 22L 89.8

B737 Jun 28, 22:43 B737 3 A 22L 89.5

B738 Jun 29, 12:50 B738 3 A 22L 89.5

B737 Jun 28, 22:43 B737 3 A 22L 89.5

B737 Jun 29, 12:50 B738 3 A 22L 89.5

A319 Jun 22, 11:59 B738 3 A 22L 89.3

CL30 Jun 22, 11:59 B738 3 A 22L 89.3

B738 Jun 29, 14:38 B737 3 A 22L 89.3

B737 Jun 28, 19:44 B737 3 A 22L 89.3

B737 Jun 29, 14:38 B737 3 A 22L 89.3

CL30 Jun 28, 19:44 B737 3 A 22L 89.3

B737 Jun 28, 18:18 B738 3 A 22L 89.2

B738 Jun 28, 18:18 B738 3 A 22L 89.2

B737 Jul 06, 16:07 B737 3 D 04R 89.2

1 "D" represents departures, "A" represents arrivals.

9575 85

Chicago Department of Aviation Page 12 Printed August 2017

Gate Location ReportChicago Midway International AirportPeriod: June 28, 2017Operations: Arrivals and DeparturesGate: Site 2182

Source: Airport Noise Management System (ANMS)

Summary

Arrivals: 407Operations Left of Center: 336 (83%)

Departures: 0 Total Operations: 407Operations Right of Center: 71 (17%)

: Right Boundary of Gate: Center of Gate: Left Boundary of Gate

Chicago Department of Aviation Page 13 Printed August 2017

Aircraft Altitude ReportChicago Midway International AirportPeriod: June 28, 2017Operations: Arrivals and DeparturesGate: Site 2182

Note: Airport elevation is based on published aeronautical chartsSource: Airport Noise Management System (ANMS)

Summary

Arrivals: 407Operations Left of Center: 336 (83%)

0

500

1,000

1,500

2,000

2,500

3,000

-1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0

Ab

ove

Air

po

rt E

leva

tio

n (

feet

)

Deviation From Center of Gate (miles)

Departures: 0 Total Operations: 407Operations Right of Center: 71 (17%)

Chicago Department of Aviation Page 14 Printed August 2017

Midway Noise Hotline: 1-800-914-8537 www.flychicago.com/midwaynoise