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<br />. <br /> <br />. <br /> <br />. <br /> <br />acceptable noise level <br />family dwellings would <br />interior noise standards <br />night. <br /> <br />of 65 dB CNEL. The proposed single- <br />also be required to meet the City's <br />of 55 dBA during the day and 45 dBA at <br /> <br />The project site is situated within an area that consists of <br />residential land uses. Roadways adj acent to the proj ect site <br />have relatively low traffic volumes. Existing noise levels <br />within the project area are anticipated to be less than 65 dB <br />CNEL. For those dwelling units that have outdoor living areas <br />adj acent to proj ect area roadways, a concrete block wall would <br />be provided to reduce noise levels. Additionally, based on a <br />typical attenuation factor of 20 dBA with windows closed for <br />Title 24 residential development, interior noise levels for the <br />project would not exceed the City's interior noise standards. <br /> <br />The proposed project would generate a minimal amount of traffic <br />within the project area. No significant increases in existing <br />noise levels are expected to occur from project related traffic. <br /> <br />B. <br /> <br />Exposure of persons to or generation of <br />groundborne vibration or groundborne noise levels. <br /> <br />excessive <br /> <br />Less Than Significant Impact <br /> <br />Vibration is a trembling, quivering, or oscillating motion of <br />the earth. Vibration can be either natural as in the form of <br />earthquakes, volcanic eruptions, sea waves, landslides, etc., or <br />man-made as from explosions, the action of heavy machinery, or <br />heavy vehicles such as trucks or trains. Both natural and man- <br />made vibration may be continuous such as from operating <br />machinery, or transient as from an explosion. <br /> <br />Construction operations for the proposed project would involve <br />conventional construction equipment and building practices. No <br />significant vibration impacts would result from construction <br />operations. Additionally, the operation of the proposed project <br />would not result in any long-term vibration impacts. <br /> <br />D. <br /> <br />A substantial temporary or periodic increase in ambient <br />noise levels in the project vicinity above levels existing <br />without project. <br /> <br />Potentially Significant Unless Mitigation Incorporated <br /> <br />Short-term noise impacts <br />preparation, excavation, <br /> <br />associated with <br />construction of <br /> <br />site <br />the <br /> <br />are impacts <br />grading, and <br /> <br />20 <br /> <br />3'~~lí~ <br />