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2 Envirorament�l Analysis <br /> The temporaty noise from routine construcrian acrivity,however,would be within the levels <br /> considered normallp acceptable at the residential districts on Brewste�Avenue and at the Kaiser <br /> Permanente facilities.The proposed construction activiry and equipment u-ould comply with the City <br /> noise orc�inance and wauld not result in prohibited incxeases in noise leveis in residenrial areas. <br /> Once constructed, noise levels from the US 101 undercrossing and Bair Island pum� station would <br /> be within the levels normallp acceptable for the sutrounding areas. The replacement putnps would be <br /> undergtound and would typically operate when submerged in the wet we11,which would dampen the <br /> pump noise. The emergency generator would have a naise enclosure,which would reduce noise <br /> levels to 71 dBr� at 50 feet. Noise levels at the adjacent commercial tises would be less than 65 dBA. <br /> The following measures would reduce noise impacts from project-related construction activities and <br /> the emergency generator: <br /> Mitigation Measure NOi 1: Construction Scheduling . <br /> The Contractor shall ensure that noise-generating construcrion activity is limited to between <br /> the hours of 7:3Q AI�Z and 4:00 PM,Monday through Friday,and noise levels generated by <br /> construcrion are pxohibited on Satutdays, 5undays and holidays. <br /> Mitigation Measure NQI 2: Construction Ec�uiprnent Mu£f�ers and Maintenance <br /> The Contractor shall equip all internal combust�on engine-driven equipment with intake and <br /> exhaust mufflers that are in good condition and designed for the equipment. <br /> Mitigation Measuse NOI 3: Quiet Equipment Selection <br /> The Contractor shall use quiet constreicrion ec�uipment,particularly air campressoxs,wherever <br /> possible. <br /> Mitigation Measu=e NOI 4:Noti�cation of Pile Driving <br /> The Contractor shall provide advanced written notification of the schedule for project pile <br /> driving acrivities to homes and i�usinesses on the east side of US 101 within 200 feet of the <br /> replacement pump statian site. <br /> Mitigation Measute NOI 5:Noise Disturbance Caordinator <br /> The City shall designate a "noise disturbance coordinator" who would be responsible far <br /> responding to any loca�complaints abaut construcrion noise. The distE.�rbance coordinatar <br /> would detennine the cause of the noise complaint (e.g., starting too early,bad muffler, etc.) <br /> and institute reasonabJ.e measures waxranted to correct the problem. The telephone number <br /> for the disturbance coordinator shall be posted in a conspicuous location at the construcrion <br /> site. <br /> Mitigation Measure NOI 6: Enclasure <br /> The Contractor shall select an avai�able sound atten�ation enclosure for the emergency <br /> generatot that wo�d reduce noise leveZs ta 71 dBA at 50 feet. <br /> .'-� G US 90� Pede.rt�zan UndercrossisagarrdBair <br /> I.rland Road Storrr�Drain Pump Station Project <br />