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Mitigation Measure 4.4-8: ~ To protect the riparian habitat associated with the <br /> Arroyo del Valle, a 100-foot setback shall generally be established from the top of the south <br /> bank of the Arroyo del Valle. No development or construction activities other than detention <br /> basins and Wails shall be allowed within the setback area. The Wails shall be setback as far as <br /> possible from Arroyo del Valle to minimize disturbance by people and maximize habitat values. <br /> Construction project fencing shall be placed at the outer edge of the setback area. The fencing <br /> shall be maintained until all construction activities are completed. The setback requirement for <br /> trails shall also apply to other riparian corridors within Specific Plan Area. <br /> <br />NOISE (Section 4.5) <br /> <br />SIGNIFICANT EFFECT <br /> <br />Impact 4.5-1: Noise from Construction Activities. Construction activities within the Specific Plan <br /> Area would generate intermittent and temporary increases in noise. Noise sensitive land uses <br /> may be subjected to intermittent noise levels in excess of the City's exterior noise standards. As <br /> a result, the generation of construction noise would be considered a potentially significant <br /> impact. <br /> <br />Changes or alterations have been required in, or incorporated into, the project which mitigate or avoid <br />the significant effects on the environment. <br /> <br />Facts in Support of Finding <br /> <br />The City of Pleasanton has adopted the following measures which will reduce potential noise impacts to <br />a less-than-significant level: <br /> <br />Mitigation Measure 4.5-1: Noise from Construction Activities in the Specific Plan Area <br /> Construction of housing, roads, other infrastructure, and other site improvements shall be limited <br /> to between the hours of 8:00 a.m. and 5:00 p.m., Monday through Saturday. <br /> <br />SIGNIFICANT EFFECT <br /> <br />Impact 4.5-2: Stationary. Source Noise Generated by Development. Noise generated by residential <br /> land uses would increase with site development. Noise level increases would also be anticipated <br /> with the school, park and potential commercial land uses. Because these increased noise levels <br /> would not be expected to exceed the City's threshold of 60 dBA L~, significant impacts would <br /> not be anticipated. <br /> <br />Changes or alterations have been required in, or incorporated into, the project which mitigate or avoid <br />the significant effects on the environment. <br /> <br />Facts in Support of Finding <br /> <br />The City of Pleasanton has adopted the following measures which will reduce potential noise impacts to <br />a less-than-significant level: <br /> <br />Vineyard Avenue Corridor Specific Plan Draft EIR -18- Findings <br /> <br /> <br />