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z.u ENVIRONMENTAL CHECKLIST <br />To reduce daytime noise impacts due to construction, the City shall require that construction <br />contractors muffle or control noise from construction equipment through implementakion of the <br />following measures: <br />Equipment and trucks used for construction shall utilize the best available noise control <br />techniques (e.g., improved mufflers, equipment redesign, use of intake silencers, ducts, <br />engine enclosures and acoustically-attenuating shields and shrouds, and installation of <br />blankets around the Project site, wherever feasible and necessary). Construction vehicles <br />shall be properly maintained and equipped with exhaust mufflers that meet state standards. <br />Impact tools (e.g., jackhammers and pavement breakers) used for construction shall be <br />hydraulically or electrically powered wherever possible to avoid noise associated with <br />compressed air exhaust from pneumatically powered tools. However, where use of <br />pneumatic tools is unavoidable, an exhaust muffler on the compressed air exhaust shall be <br />used; this muffler can lower noise levels from the exhaust by up to about 10 dBA. External <br />jackets on the tools themselves shall be used where feasible, and this could achieve a <br />reduction of 5 dBA. Quieter procedures shall be used such as drilling rather than impact <br />equipment whenever feasible. <br />^ Stationary noise sources shall be located as faz from sensitive receptors as possible. If they <br />must be located near sensitive receptors, they shall be muffled to the extent feasible and <br />enclosed within temporary sheds. <br />San Leandro Rccycled Water Projcct 2-39 ESA / 203193 <br />Draft IS/MND <br />