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SAN LEANDRO SHORELINE DEVELOPMENT DRAFT EIR <br />CITY OF SAN LEANDRO <br />EXECUTIVE SUMMARY <br />TABLE 1-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES <br />Significant Impact <br />NOISE -4. Construction activities associated with buildout <br />of the Project would result in substantial temporary or <br />periodic increases in ambient noise levels in the vicinity of <br />the Project site above existing levels. <br />Significance <br />Before <br />Mitigation <br />LTS = Less Than Significant S = Significant SU = Significant Unavoidable Impact <br />Mitigation Measures <br />access Marina Boulevard; in addition, rubberized asphalt is only <br />effective at roads in which cars travel at high speeds, as it only <br />reduces tire -asphalt noise, but the speed limit in that segment is <br />low, making this solution not effective. Therefore, no feasible <br />mitigation measures are available to reduce these impacts. <br />Therefore, on -road vehicle noise due to the project would result in <br />substantial permanent increases in ambient noise levels along <br />Marina Boulevard west of Aurora Drive, and this impact would be <br />significant and unavoidable. <br />NOISE -4: The Project shall implement the following measures. <br />■ Construction equipment shall be well maintained and used <br />judiciously to be as quiet as practical. Equipment and trucks used <br />for project construction shall utilize the best available noise <br />control techniques (e.g., improved mufflers, equipment redesign, <br />use of intake silencers, ducts, engine enclosures, and acoustically <br />attenuating shields or shrouds), wherever feasible; <br />■ Utilize "quiet" models of air compressors and other stationary <br />noise sources where such technology exists. Select hydraulically - <br />or electrically -powered equipment and avoid pneumatically <br />powered equipment where feasible. Impact tools (e.g., jack <br />hammers, pavement breakers, and rock drills) used for project <br />demolition or construction shall be hydraulically or electrically <br />powered wherever possible to avoid noise associated with <br />compressed air exhaust from pneumatically powered tools. <br />However, where use of pneumatic tools is unavoidable, an <br />exhaust muffler on the compressed air exhaust shall be used. <br />Quieter procedures shall be used, such as drills rather than <br />impact equipment, whenever such procedures are available and <br />consistent with construction procedures; <br />■ Locate stationary noise -generating equipment as far as possible <br />from sensitive receptors that adjoin construction sites. Construct <br />temporary noise barriers or partial enclosures to acoustically <br />shield such equipment where feasible; <br />■ Prohibit unnecessary idling of internal combustion engines; <br />Significance <br />With <br />Mitigation <br />LTS <br />1-34 DECEMBER 2014 <br />