Consultants in Acoustics Audiovisual System Design and Telecommunications 130 Sutter Street, Fifth Floor San Francisco California 94104 Tel: 415 397 0442 Fax: 415 397 0454 info@cmsalter.com www.cmsalter.com Charles M Salter, PE

David R Schwind, FAES

Anthony P Nash, PE

Eva Duesler

Thomas A Schindler, PE

Kenneth W Graven, PE

Eric L Broadhurst, PE

Philip N Sanders

Robert P Alvarado

John C Freytag, PE

Durand R Begault, Ph.D.

Michael D Toy, PE

Thomas J Corbett

Ross A Jerozal

Jason R Duty

Cristina L Miyar

Joey G D’Angelo

Eric A Yee

Joshua M Roper

Troy Gimbel

Randy D Waldeck

Peter K Holst

Andrew L Stanley

Christopher A Peltier

Timothy G Brown

Jeff Clukey

Ethan Salter

Elaine Y Hsieh

Alexander K Salter

Jeremy L Decker

Ryan McClain

Claudia Kraehe

Brian Good

Candice Huey

Josselyn Salter

Heather Migut

Marva D Noordzee

Debbie Garcia

Jasmine Recidoro

Alison Whitson

Consultants in Acoustics Audiovisual System Design and Telecommunications 130 Sutter Street, Fifth Floor San Francisco California 94104 Tel: 415 397 0442 Fax: 415 397 0454 info@cmsalter.com www.cmsalter.com Charles M Salter, PE

David R Schwind, FAES

Anthony P Nash, PE

Eva Duesler

Thomas A Schindler, PE

Kenneth W Graven, PE

Eric L Broadhurst, PE

Philip N Sanders

Robert P Alvarado

John C Freytag, PE

Durand R Begault, Ph.D.

Michael D Toy, PE

Thomas J Corbett

Ross A Jerozal

Jason R Duty

Cristina L Miyar

Joey G D’Angelo

Eric A Yee

Joshua M Roper

Troy Gimbel

Randy D Waldeck

Peter K Holst

Andrew L Stanley

Christopher A Peltier

Timothy G Brown

Jeff Clukey

Ethan Salter

Elaine Y Hsieh

Alexander K Salter

Jeremy L Decker

Ryan McClain

Claudia Kraehe

Brian Good

Candice Huey

Josselyn Salter

Heather Migut

Marva D Noordzee

Debbie Garcia

Jasmine Recidoro

Alison Whitson

27 October 2010 (revised 10 October 2011) Gordon Bell Cortel LLC 26 Stoneyford Avenue San Francisco, CA 94112 E-mail: gordon.bell@cortel-llc.com Subject: 1861 Solano Avenue, Berkeley, CA (CN4216) --

Acoustical Consulting CSA Project No. 10-0376

Dear Gordon: This letter has been revised to reflect the design changes for the subject project. AT&T is proposing to add 9 total cabinets instead of 5 cabinets. This letter summarizes the results of our acoustical analysis for the proposed wireless communications equipment to be located at the subject rooftop. We understand that up to nine new radio-base station (RBS) cabinets for AT&T will be installed in a service well between the lobby building and theater building of the Oaks Theater along Solano Avenue. The nearest noise-sensitive receivers are residential properties along Station Avenue to the north. In summary, the noise from the new AT&T equipment would comply with the City’s noise standards and would not be noticed due to the low noise output and significant acoustical shielding. Acoustical Criteria The Berkeley Noise Ordinance contains specific noise standards in Subsection 13.40.050, Exterior Noise Standards. For residential use, the upper noise limits for continuous noise sources areas follows: Zoning District Time Period Noise Level (dBA)1 R-1, R-2, R-1A, R-2A, and ESR

7:00 a.m. – 10:00 p.m. 10:00 p.m. – 7:00 p.m.

55 45

Additionally, the California Environmental Quality Act (CEQA) guidelines include a checklist of items, some of which related to noise and vibration. One item asks if the project will exceed any established noise standards or substantially increase existing ambient noise levels.

1 dBA--A-Weighted sound pressure level (or by weighting the amplitudes of various acoustical hearing. A 10-dB (decibel) increase in noise level specified by the U.S. EPA, OSHA, Caltrans, presented in this report are A-weighted.

C h a r l e s M S a l t e r A s s o c i a t e s I n c

Gordon Bell 27 October 2010(10 October 2011) Page 2

C ha r le s M Sa l t e r A ss o c i a t es 130 Sutter Street, Suite 500 San Francisco California 94104 Tel: 415.397.0442 Fax: 415.397.0454

To address the future increase in noise levels from this project, a change of 3 dB or less is considered just noticeable and not expected to cause significant community response. A change of 4 to 5 dB is marginal, but could be considered an impact if the resultant noise level exceeds “normally acceptable” levels. A change of more than 5 dB would be clearly noticeable and considered a significant impact, especially since it could potentially cause adverse community response. Noise Measurements On 24 to 26 September 2010, we conducted 48-hours of noise monitoring along Station Avenue. The purpose of this measurement was to document the existing background noise environment. We were unable to measure at the property line between the residents and the project because it was private property. We estimate that the noise levels at the back of the residents would be 5 decibels less that the measured levels along Station Avenue. At a distance of 10 feet west of Station Avenue centerline, we measured hourly background noise levels between 46 and 50 dB during the daytime hours (7:00 a.m. to 10:00 p.m.), and 37 to 45 dB at night (10:00 p.m. to 7:00 a.m.). The primary source of noise was mechanical equipment noise from rooftop equipment from businesses along Solano Avenue. We estimate that noise levels at the back of the residents would be 41 dB to 45 dB during the day and 32 dB to 40 dB during the night. Noise Analysis The proposed RBS cabinets are manufactured by Ericsson. Of the potential nine cabinets, two of would be model RBS 2106, and can each generate up to 60 dB at 1 meter (3.25 feet) depending on directivity and the ambient temperature. Two would be model RBS 3106, and are estimated to each generate no more than 61 dB at 1 meter (3.25 feet). Two would be model RBS 6601, and are estimated to each generate no more than 65 dB at 1 meter (3.25 feet). The remaining three cabinets are solid state, do not have any moving parts, and would not generate significant noise levels compared to the other six cabinets. All nine together are calculated to generate 71 dB at 1 meter (3.25 feet). The nearest neighboring receiver to this new equipment is a single-story house at 861 Station Avenue located to the north. Based on information shown in the Streamline Engineering drawings, the proposed equipment is located in a service well between the theater house and lobby building. The RBS cabinets would be located approximately 100 feet from the nearest residences separated by the theater house, which is 31 feet higher in elevation than the cabinets. Taking into account a “worst-case” warm weather day, the distance set-backs, shielding, and directivity, we calculate that the five cabinets would generate up to 22 dB at the nearest neighboring residences. This level complies with both daytime and nighttime standard. The addition of the AT&T equipment should not increase the existing ambient noise. Therefore, we would not expect any significant community response.

Gordon Bell 27 October 2010(10 October 2011) Page 3

C ha r le s M Sa l t e r A ss o c i a t es 130 Sutter Street, Suite 500 San Francisco California 94104 Tel: 415.397.0442 Fax: 415.397.0454

This concludes our comments on the subject project. Should you have any questions, please give us a call. Sincerely, CHARLES M. SALTER ASSOCIATES, INC.

Eric A. Yee Principal Consultant EAY P:\CSA_Projects\y2010\10-0376_EAY_Solano Ave (CN 4216)\Corresp Out\27oct10_ATT CN4126.doc

Encl.