Attachment 7 - Noise StudyVeneklasen Associates
Consultants in Acoustics | Noise | Vibration | AV | IT
1711 Sixteenth Street • Santa Monica California 90404 • tel: 310.450.1733 • fax: 310.396.3424 • www.veneklasen.com
September 27, 2022
Red Hook Capital Partners
2120 East Grand Ave, Suite #135
El Segundo, CA 90245
Attention: Ingrid Canedo | Project Manager
Subject: 2780 East Wagner
Anaheim, California
Property Line Noise Assessment
Veneklasen Project No. 6338-005
Dear Ingrid,
Veneklasen Associates, Inc. (Veneklasen) provides the following assessment of the expected noise due to the future
operation of the proposed 2780 East Wagner project and how it affects adjacent residential properties located west of
the proposed space. Noise is compared to the City of Anaheim noise criteria, as applicable. This report documents our
acoustical comments.
1.0 INTRODUCTION
This study was conducted to determine the impact of the expected noise due to the future operation of the
2780 East Wagner project in Anaheim, California. Veneklasen’s scope of work included calculating the
expected future exterior noise levels impacting the site, comparing them against existing conditions and
determining the method, if any, required to reduce the interior and exterior sound levels to meet the
applicable code requirements of the City of Anaheim.
The project is an Educational Institution-General Use proposed by Scholarship Prep Public Schools at an
existing church and school site. The project is bounded by East Wagner Ave to the north, existing residential
uses to the west, and a flood basin to the east and south. Orange freeway (CA-57) is located at the west side
three blocks away.
2.0 NOISE CRITERIA
Leq (equivalent continuous sound level) is defined as the steady sound pressure level which, over a given
period of time, has the same total energy as the actual fluctuating noise.
2.1 Municipal Code
The Anaheim Municipal Code, Chapter 6.70 Sound Pressure Levels, Section 6.70.010, Established, states this:
No person shall within the City create any sound radiated for extended periods from any premises
which produces a sound pressure level at any point on the property line in excess of sixty decibels (Re
0.0002 Microbar) read on the A-scale of a sound level meter. Readings shall be taken in accordance
with the instrument manufacturer’s instructions, using the slowest meter response.
The sound level measuring microphone shall be placed at any point on the property line, but not
closer than three (3) feet from any wall and not less than three (3) feet above the ground, where the
above listed maximum sound pressure level shall apply. At any point the measured level shall be the
average of not less than three (3) readings taken at two (2) minute intervals. To have valid readings,
the levels must be five (5) decibels or more above the levels prevailing at the same point when the
source’s of the alleged objectionable sound are not operating.
ATTACHMENT NO. 7
Veneklasen Associates
2780 East Wagner; Anaheim, California
Property Line Noise Assessment
Veneklasen Project No. 6338-005
September 27, 2022–Page 2
www.veneklasen.com
In summary, the project noise levels (children’s activities over an extended period) shall not raise the noise
level on the adjacent residential property to more than 60 dBA.
3.0 EXTERIOR NOISE ENVIRONMENT
3.1 Noise Measurements
Veneklasen visited the site on Tuesday, April 12, 2022 and completed short-term noise measurements using
an NTi XL2 Sound Level Meter. Appendix II provides additional information related to the noise
measurements. Table 1 and Figure 1 show the location and summary of the noise measurements, based on
the current facility operations and the expected future noise sources.
Table 1 – Measured Sound Levels
Location Description Leq dBA
S1 Loud chat of kids at snack time, 5 feet away. 72
S2 Ambient background noise levels, between spaces 61
S3 Ambient background noise levels, open area 58
S4 Teenagers playing basketball, freeway noise at distance 63
Figure 1 – Aerial View of Project Site Showing Measurement Locations
3.2 Computer Modeling
Veneklasen has utilized computer noise modeling software in order to predict noise levels from future school
activities from locations marked in the new design.
Veneklasen Associates
2780 East Wagner; Anaheim, California
Property Line Noise Assessment
Veneklasen Project No. 6338-005
September 27, 2022–Page 3
www.veneklasen.com
The primary purpose of the computer model was to determine the noise levels at the property line of the
residential area to the west of the project site due to the new number of students and outdoor activities.
Table 2 shows the outdoor activities and their number of students as provided by the client.
Table 2 – Outdoor Activities Information
Outdoor Activity # of students
Electives 120 – 180
Recess 120 – 180
Lunch 60 – 120
Afterschool program Up 120
Drop-off/Pickup Up 480
The information shown in Table 2 was used in the calculations. Appendix I provide the simulation of expected
noise levels for different scenarios for the area surrounding the project site.
The values shown in figures on Appendix I do not include the background noise levels at site.
3.3 Noise Assessment
Veneklasen assessed the potential noise due to the noise sources and the new number of students attending
Scholarship Prep at East Wagner Avenue. By using the scenarios from the simulations, Veneklasen has
predicted the expected noise at the property line of concern. The analysis was completed with taking into
account the reduction in sound level due to distance and shielding from buildings.
Noise levels obtained from the S1 and S4 measurements were used as sample of noise to recreate Recess,
Lunch, Electives and Afterschool program activities. A noise measurement taken recently from another school
project was used to recreate the Drop-off/pick-up noise levels. The extended expected levels at the property
line, as determined from the computer model were used in the calculation of the expected noise levels due
to the new layout. The client specified that the outside use of intercom or bell system won’t be implemented
for this project.
The results expected at the residential property line, after considering the new number of students per
activity and their predicted exterior noise levels due the new layout is 60 dBA or less. This result takes into
consideration the city requirement for a 15 ft setback from the property line, the existing solid wall along the
property line, the orientation of the buildings, and the background noise levels combined with the results
obtained from the simulations presented in Appendix I.
The predicted noise levels under the new layout is not expected to exceed 60 dBA over an extended period of
time, which is in compliance to the noise criteria set by the City of Anaheim noise ordinance.
4.0 SUMMARY
Veneklasen was contracted to assess any potential noise disturbance to an adjacent receptor due to the
proposed new design and increase of number of students to 480. Acoustical measurements were taken of
typical current exterior noise activities in the existing space and used to calculate expected receiver noise
levels at the sensitive neighboring residential properties.
According to our calculations, noise levels at the residential area are expected to be in compliance with the
City of Anaheim Municipal Code requirements summarized above without any modifications to the proposed
design.
Veneklasen Associates
2780 East Wagner; Anaheim, California
Property Line Noise Assessment
Veneklasen Project No. 6338-005
September 27, 2022–Page 4
www.veneklasen.com
If you have any questions or comments regarding this report, please do not hesitate to contact us.
Sincerely,
Veneklasen Associates, Inc.
Colin Spohr, Cathleen Novak
Senior Associate Associate
Veneklasen Associates
2780 East Wagner; Anaheim, California
Property Line Noise Assessment
Veneklasen Project No. 6338-005
September 27, 2022–Page 5
www.veneklasen.com
APPENDIX I – SIMULATION OF ACTIVITIES NOISE LEVELS
Figure 2 – Simulation of Drop-off/Pick-up (90/120 students) Noise Levels, Leq, dBA
*note that the light blue box in Figure 2 denotes pick up and drop off area
Figure 3 – Simulation of Drop-off/Pick-up (up to 480 students) Noise Levels, Leq, dBA
*note that the light blue box in Figure 3 denotes pick up and drop off area
Veneklasen Associates
2780 East Wagner; Anaheim, California
Property Line Noise Assessment
Veneklasen Project No. 6338-005
September 27, 2022–Page 6
www.veneklasen.com
Figure 4 – Simulation of Play Areas (90/120 students) Noise Levels, Leq, dBA
*note that the light blue box in Figure 4 denotes student play area
Figure 5 – Simulation of Play Areas (up to 180 students) Noise Levels, Leq, dBA
*note that the light blue box in Figure 4 denotes student play area
Veneklasen Associates
2780 East Wagner; Anaheim, California
Property Line Noise Assessment
Veneklasen Project No. 6338-005
September 27, 2022–Page 7
www.veneklasen.com
APPENDIX II – MEASURED HOURLY NOISE LEVELS
Location Start Time Duration LAeq
S1 3:19 pm 0:04:00 72
S2 3:28 pm 0:10:00 61
S3 3:41 pm 0:18:00 58
S4 4:32 pm 0:02:30 63