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TABLE 1-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES <br />Significant Impact <br />Significance <br />Before <br />Mitigation Mitigation Measures <br />Significance <br />With <br />Mitigation <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. 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 />S 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 />LTS