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Section 4.0 – Environmental Setting and Discussion of Impacts <br /> <br /> <br />City of Redwood City 74 Initial Study/Mitigated Negative Declaration <br />Sandpiper Elementary School Facilities Expansion November 2016 <br />4.12.2 Environmental Checklist <br /> <br />NOISE <br /> Potentially <br />Significant <br />Impact <br />Less Than <br />Significant <br />With <br />Mitigation <br />Incorporated <br />Less Than <br />Significant <br />Impact <br />No Impact Beneficial <br />Impact <br />Information <br />Source(s) <br />Would the project result in: <br />1) Exposure of persons to or generation <br />of noise levels in excess of standards <br />established in the local general plan <br />or noise ordinance, or applicable <br />standards of other agencies? <br /> 1-3 <br />2) Exposure of persons to, or <br />generation of, excessive <br />groundborne vibration or <br />groundborne noise levels? <br /> 1 <br />3) A substantial permanent increase in <br />ambient noise levels in the project <br />vicinity above levels existing <br />without the project? <br /> 1-3 <br />4) A substantial temporary or periodic <br />increase in ambient noise levels in <br />the project vicinity above levels <br />existing without the project? <br /> 1-3 <br />5) For a project located within an <br />airport land use plan or, where <br />such a plan has not been adopted, <br />within two miles of a public <br />airport or public use airport, would <br />the project expose people residing <br />or working in the project area to <br />excessive noise levels? <br /> 1,18 <br />6) For a project within the vicinity of a <br />private airstrip, would the project <br />expose people residing or working in <br />the project area to excessive noise <br />levels? <br /> 1 <br /> <br />4.12.3 Noise Impacts <br /> <br />4.12.3.1 Noise Thresholds <br /> <br />The CEQA Guidelines state that a project will normally be considered to have a significant impact if <br />the noise levels generated by the project will substantially increase existing noise levels at noise <br />sensitive receivers on a permanent or temporary basis. CEQA does not define what noise level <br />increase should be considered substantial. <br />7.A. - Page 105