2/7/23 Hem #7
City Council
Item #7 RTC 23-74
Informational Report on
Written Petition:
Noise Levels at Levi's
1852
Stadium Concerts
THE MISSION CIT
February 7, 2023
1 City of
Santa Clara
The Center of What's Possible
Concert Noise Levels
Background: Written Petition
• June 21, 2022 Council considered a Written Petition submitted by Anurag Aggrawal and Ajay Thadhlani and other residents of North Santa Clara near Levi's Stadium Petitioners
• Petition referenced impact of noise upon residents from the Sunday, May 15, 2022 Coldplay concert and fireworks
• Council voted unanimously to place the item on a future City Council meeting agenda
2 2
POST MEETING MATERIAL
1 City of
Santa Clara
The Center of What's Possible
Concert Noise Levels
#3
Unattended Noise Monitoring Hughes Elementary
Stadium: 1,800 ft
Wilson Ihrig & Associates performed
Ave de Lago &
Ave de los Arboles
analysis of noise data received from
Stadium: 2,700 ft
Stadium
unattended noise monitoring station
#1
Cheeney & Lenox
Stadium: 1,850 ft
4624 Cheeney
Stadium: 2,460 ft
3 3
City of
Santa Clara
The Center of What's Possible
Concert Noise Levels
Attended Noise Monitoring
2382 Avenida De Guadalupe
For The Weeknd and Elton John
Concerts Wilson Ihrig performed
attended (live) noise monitoring at
nanou anony
the Cheeney & Lenox station and Monitoring Station
locations where residents
previously shared noise complaints
2340 Esperanca Ave
through the Written Petition
regarding the Coldplay Concert
4305 Watson Circle
4 2
City of
Santa Clara
The Center of What's Possible
Concert Noise Levels
Regulatory Context
1. Stadium Permit Conditions of Approval:
Maximum sound level exposure at the nearest residences to the east and south of Stadium shall be a target of 60 dBA Leq (1 hour average)
2. Noise levels predicted in Stadium EIR:
Concert noise levels would be approximately 66 dBA Leq or less at the nearest residences south of the stadium
Hourly average noise levels would exceed ambient hourly average noise levels by 4 dBA Leq and background noise levels by 19 to 24 dBA 5 5
City of
Santa Clara
The Center of What's Possible
Concert Noise Levels
Analysis Methodology
1. Analysis differentiates jet noise from concert noise by automated filter or by detailed manual analysis
2. Analysis reflects refinements to account for jet noise, so not to attribute jet noise to concert noise levels
3. Analysis accounts for the drop in noise levels that occurs between the nearest residential use (e.g., a rear yard property line) and the location where noise monitoring took place
6 6
3 City of
Santa Clara
The Center of What's Possible
Concert Noise Levels
Analysis Results
1. Coldplay (May 15, 2022) - exceeded Stadium Permit noise level target by up to 9 dBA Leq and the concert-noise level predicted for the EIR by up to 3 dBA Leq
2. The Weeknd (August 27, 2022) - exceeded Stadium Permit target by 3 dBA Leq, but did not exceed the concert-noise level predicted for the EIR
3. Elton John (October 9, 2022) - did not exceed either the Stadium Permit noise level target or the concert-noise level predicted for the EIR 7 7
City of
Santa Clara
The Contero Whats Postiba
Concert Noise Levels
Next Steps
1. Results suggest that noise levels vary from concert to concert and can be influenced by the way in which the concert is conducted
2. Staff will work with stadium management so that future events at the stadium conform with City requirements
8 8
4 City Council
CL ARA
Item #7 RTC 23-74
CITY OF SAN CALIFORNIA Informational Report on
Written Petition:
Noise Levels at Levi's
1852
Stadium Concerts
THE MISSION CIN
February 7, 2023
5