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4. Mitigation Monitoring and Reporting Program <br /> <br />TABLE 4-1 (CONTINUED) <br />TRANSIT DISTRICT DTPP AMENDMENTS MITIGATION MONITORING AND REPORTING PROGRAM <br />Redwood City Transit District DTPP Amendments 4-7 ESA / 202100421.00 <br />Final EIR October 2022 <br />MITIGATION MEASURES <br />Monitoring Program <br />Implementation <br />Responsibility <br />Monitoring and <br />Reporting Action <br />Monitoring <br />Responsibility <br />Monitoring <br />Schedule <br />Noise (cont’d.) <br />Mitigation Measure NO-1 (cont’d.) <br /> Noise Disturbance Coordinator. For projects that would last over one year in <br />duration, the City may choose to require the Project Applicant to designate a <br />“Noise Disturbance Coordinator” who shall be responsible for responding to any <br />local complaints about construction noise. The Disturbance Coordinator shall <br />determine the cause of the noise complaint (e.g., starting too early, bad muffler, <br />etc.) and institute reasonable measures to correct the problem. The Project <br />Applicant shall post, in a conspicuous location, a telephone number for the <br />Disturbance Coordinator at the construction site and include it in the notice sent <br />to neighbors regarding the construction schedule. (The Noise Disturbance <br />Coordinator shall work directly with an assigned City staff member.) <br /> <br />Mitigation Measure NO-2: Operational Noise Performance Standard: Prior to <br />the issuance of any building permit, future Project Applicants within the Transit <br />District area shall ensure that all mechanical equipment is selected and designed to <br />reduce impacts on surrounding uses by meeting the performance standards of <br />Chapters 36.7.B of the Redwood City Zoning Code, limiting noise from stationary <br />sources such as mechanical equipment to 55 dBA at the property lines. If noise <br />levels exceed these standards, the activity causing the noise shall be abated until <br />appropriate noise reduction measures have been installed and compliance has <br />been verified by the City. Methods of achieving these standards include, but are not <br />limited to, using low-noise-emitting HVAC equipment, locating HVAC and other <br />mechanical equipment within a rooftop mechanical penthouse, and using shields <br />and parapets to reduce noise levels to adjacent land uses. For emergency <br />generators, industrial-grade silencers can reduce exhaust noise by 12 to 18 dBA, <br />and residential-grade silencers can reduce such noise by 18 to 25 dBA (American <br />Society of Heating, Refrigeration, and Air Conditioning Engineers, Technical <br />Committee on Sound and Vibration, 2006). Acoustical screening can also be applied <br />to exterior noise sources and can achieve up to 15 dBA of noise reduction <br />(Environmental Noise Control, 2014). <br />An acoustical study shall be prepared by a qualified acoustical engineer during final <br />building design to evaluate the potential noise generated by building mechanical <br />equipment and to identify the necessary design measures to be incorporated to <br />meet the City’s standards. The study shall be submitted to the Director of the City of <br />Redwood City Community Development and Transportation Department for review <br />and approval before the issuance of any building permit. <br />Project Applicant, <br />qualified acoustical <br />engineer, City <br />Prepare acoustical <br />study during final <br />building design <br />Director of the City <br />of Redwood City <br />Community <br />Development and <br />Transportation <br />Department <br />Prior to issuance of <br />building permit