07 - Laserfiche WebLink

Acoustics Audiovisual Telecommunications Security Charles Salter PE David R. Sdwbs4 FASA Eric IBroodhmstl Mort, PE PFihp N. Sanders, IEED AP Thomas A. Schindor, PE Durand R. Bogart, PhD. FAES Ken Graven PE RCDD, CTS D Anthony P. Nosh PE Gutino L Mya Jason R. Duty. PE Boyd B. Rondo Thomas J. Corbett, CIS Eric A. Yoo Joshua M Roper, PE IEED AP Peter K. Hoist, PE LEEDAP Ethan G Salter PE LEED AP G mg L. Gdtan, RCDD Alexander K. Salter, PE Jeremy L Docker, PE Rob Harmon( PSP. NICE] III Andrew J. McKee Steven A Woods loth J Harrison Ymay C Patel Valerie C Smith PE BonpnMn D Per Elisabeth S. Kelon Ryon G. Roskop AIA NCARB Brian C Wourms Diego Hernandez Ryon A Schofield Ale. T. ScNoler Abner E. Hordes Adria) L lu Greg R. Enorsstoin Philip J Perry PMP Steve 1 loiby Kenneth W Itm Felipe Tesoro Blake M Wells, IEED GA Katherina M Moore Jordan I. Roberts SybrIle M Roth Bryce M Gro■en Heather A Solte. Deo E. Goruo Cothernrw F Spurlocl 1 July 2016 Todd Deutcher Catalyst Development Partners 18 Crow Canyon Court, Suite 190 San Ramon, CA 94583 Email: tdeutcher@catdevpartners.com EXHIBIT F Charles M. Salter ASSOCIATES INC. Subject: 536 St. John Street Residences, Pleasanton, CA Environmental Noise and Vibration Study Salter Project: 16 -0381 Dear Todd: 130 Sutter Street Floor 5 San Francisco, CA 94104 T 415.3970442 F 415.397.0454 www.crosolter,can As requested, we have conducted an environmental noise study for the project. The purpose of the study is to determine the noise environment at the proposed site, compare the measured data with applicable standards, and propose mitigation measures as necessary. This report summarizes the results of our study. It also summarizes our measurements and analysis of ground -borne vibration, which the State Building Code does not address. PROJECT CRITERIA State Building Code Part 1 of the Supplement to the 2013 California Building Code, effective 1 July 2015, requires that the indoor noise level in residential units not exceed DNLJ 45 dB where the exterior noise level is greater than DNL 60 dB. City Guide lines The City of Pleasanton Noise Element's' interior noise standard is consistent with the State requirement for multi - family housing. Additionally, there is a goal of a typical maximum interior noise level (Lmax3) 1 DNL (Day -Night Average Sound Level) — A descriptor for a 24 -hour A- weighted average noise level. DNL accounts for the increased acoustical sensitivity of people to noise during the nighttime hours. DNL penalizes sound levels by 10 dB during the hours from 10 PM to 7 AM. For practical purposes, the DNL and CNEL are usually interchangeable. DNL is sometimes written as Ldn. 2 City of Pleasanton Noise Element of General Plan, 2005 -2025, adopted 21 July 2009. 3 Lmax30 (Typical Maximum Sound Level) — There is no standardized metric to quantify "typical" maximum sound levels in an environment (instead of the absolute maximum sound level for a measurement period). The metric Lmax,o comes from a paper by Rob Greene ( "Max Level Intrusive Noise Limit: 1982 National Conference on Environmental and Occupational Noise "). It is based on the logarithmic average of the noisiest 30 percent of single events (e.g., train passbys, aircraft Flyovers).